示例#1
0
void btMultiBody::stepVelocities(btScalar dt,
                               btAlignedObjectArray<btScalar> &scratch_r,
                               btAlignedObjectArray<btVector3> &scratch_v,
                               btAlignedObjectArray<btMatrix3x3> &scratch_m)
{
    // Implement Featherstone's algorithm to calculate joint accelerations (q_double_dot)
    // and the base linear & angular accelerations.

    // We apply damping forces in this routine as well as any external forces specified by the 
    // caller (via addBaseForce etc).

    // output should point to an array of 6 + num_links reals.
    // Format is: 3 angular accelerations (in world frame), 3 linear accelerations (in world frame),
    // num_links joint acceleration values.
    
	int num_links = getNumLinks();

    const btScalar DAMPING_K1_LINEAR = m_linearDamping;
	const btScalar DAMPING_K2_LINEAR = m_linearDamping;

	const btScalar DAMPING_K1_ANGULAR = m_angularDamping;
	const btScalar DAMPING_K2_ANGULAR= m_angularDamping;

    btVector3 base_vel = getBaseVel();
    btVector3 base_omega = getBaseOmega();

    // Temporary matrices/vectors -- use scratch space from caller
    // so that we don't have to keep reallocating every frame

    scratch_r.resize(2*num_links + 6);
    scratch_v.resize(8*num_links + 6);
    scratch_m.resize(4*num_links + 4);

    btScalar * r_ptr = &scratch_r[0];
    btScalar * output = &scratch_r[num_links];  // "output" holds the q_double_dot results
    btVector3 * v_ptr = &scratch_v[0];
    
    // vhat_i  (top = angular, bottom = linear part)
    btVector3 * vel_top_angular = v_ptr; v_ptr += num_links + 1;
    btVector3 * vel_bottom_linear = v_ptr; v_ptr += num_links + 1;

    // zhat_i^A
    btVector3 * zero_acc_top_angular = v_ptr; v_ptr += num_links + 1;
    btVector3 * zero_acc_bottom_linear = v_ptr; v_ptr += num_links + 1;

    // chat_i  (note NOT defined for the base)
    btVector3 * coriolis_top_angular = v_ptr; v_ptr += num_links;
    btVector3 * coriolis_bottom_linear = v_ptr; v_ptr += num_links;

    // top left, top right and bottom left blocks of Ihat_i^A.
    // bottom right block = transpose of top left block and is not stored.
    // Note: the top right and bottom left blocks are always symmetric matrices, but we don't make use of this fact currently.
    btMatrix3x3 * inertia_top_left = &scratch_m[num_links + 1];
    btMatrix3x3 * inertia_top_right = &scratch_m[2*num_links + 2];
    btMatrix3x3 * inertia_bottom_left = &scratch_m[3*num_links + 3];

    // Cached 3x3 rotation matrices from parent frame to this frame.
    btMatrix3x3 * rot_from_parent = &matrix_buf[0];
    btMatrix3x3 * rot_from_world = &scratch_m[0];

    // hhat_i, ahat_i
    // hhat is NOT stored for the base (but ahat is)
    btVector3 * h_top = num_links > 0 ? &vector_buf[0] : 0;
    btVector3 * h_bottom = num_links > 0 ? &vector_buf[num_links] : 0;
    btVector3 * accel_top = v_ptr; v_ptr += num_links + 1;
    btVector3 * accel_bottom = v_ptr; v_ptr += num_links + 1;

    // Y_i, D_i
    btScalar * Y = r_ptr; r_ptr += num_links;
    btScalar * D = num_links > 0 ? &m_real_buf[6 + num_links] : 0;

    // ptr to the joint accel part of the output
    btScalar * joint_accel = output + 6;


    // Start of the algorithm proper.
    
    // First 'upward' loop.
    // Combines CompTreeLinkVelocities and InitTreeLinks from Mirtich.

    rot_from_parent[0] = btMatrix3x3(base_quat);

    vel_top_angular[0] = rot_from_parent[0] * base_omega;
    vel_bottom_linear[0] = rot_from_parent[0] * base_vel;

    if (fixed_base) {
        zero_acc_top_angular[0] = zero_acc_bottom_linear[0] = btVector3(0,0,0);
    } else {
        zero_acc_top_angular[0] = - (rot_from_parent[0] * (base_force 
                                                   - base_mass*(DAMPING_K1_LINEAR+DAMPING_K2_LINEAR*base_vel.norm())*base_vel));
		
        zero_acc_bottom_linear[0] =
            - (rot_from_parent[0] * base_torque);

		if (m_useGyroTerm)
			zero_acc_bottom_linear[0]+=vel_top_angular[0].cross( base_inertia * vel_top_angular[0] );

        zero_acc_bottom_linear[0] += base_inertia * vel_top_angular[0] * (DAMPING_K1_ANGULAR + DAMPING_K2_ANGULAR*vel_top_angular[0].norm());

    }



    inertia_top_left[0] = btMatrix3x3(0,0,0,0,0,0,0,0,0);//::Zero();
	
	
    inertia_top_right[0].setValue(base_mass, 0, 0,
                            0, base_mass, 0,
                            0, 0, base_mass);
    inertia_bottom_left[0].setValue(base_inertia[0], 0, 0,
                              0, base_inertia[1], 0,
                              0, 0, base_inertia[2]);

    rot_from_world[0] = rot_from_parent[0];

    for (int i = 0; i < num_links; ++i) {
        const int parent = links[i].parent;
        rot_from_parent[i+1] = btMatrix3x3(links[i].cached_rot_parent_to_this);
		

        rot_from_world[i+1] = rot_from_parent[i+1] * rot_from_world[parent+1];
        
        // vhat_i = i_xhat_p(i) * vhat_p(i)
        SpatialTransform(rot_from_parent[i+1], links[i].cached_r_vector,
                         vel_top_angular[parent+1], vel_bottom_linear[parent+1],
                         vel_top_angular[i+1], vel_bottom_linear[i+1]);

        // we can now calculate chat_i
        // remember vhat_i is really vhat_p(i) (but in current frame) at this point
        coriolis_bottom_linear[i] = vel_top_angular[i+1].cross(vel_top_angular[i+1].cross(links[i].cached_r_vector))
            + 2 * vel_top_angular[i+1].cross(links[i].axis_bottom) * getJointVel(i);
        if (links[i].is_revolute) {
            coriolis_top_angular[i] = vel_top_angular[i+1].cross(links[i].axis_top) * getJointVel(i);
            coriolis_bottom_linear[i] += (getJointVel(i) * getJointVel(i)) * links[i].axis_top.cross(links[i].axis_bottom);
        } else {
            coriolis_top_angular[i] = btVector3(0,0,0);
        }
        
        // now set vhat_i to its true value by doing
        // vhat_i += qidot * shat_i
        vel_top_angular[i+1] += getJointVel(i) * links[i].axis_top;
        vel_bottom_linear[i+1] += getJointVel(i) * links[i].axis_bottom;

        // calculate zhat_i^A
        zero_acc_top_angular[i+1] = - (rot_from_world[i+1] * (links[i].applied_force));
        zero_acc_top_angular[i+1] += links[i].mass * (DAMPING_K1_LINEAR + DAMPING_K2_LINEAR*vel_bottom_linear[i+1].norm()) * vel_bottom_linear[i+1];

        zero_acc_bottom_linear[i+1] =
            - (rot_from_world[i+1] * links[i].applied_torque);
		if (m_useGyroTerm)
		{
			zero_acc_bottom_linear[i+1] += vel_top_angular[i+1].cross( links[i].inertia * vel_top_angular[i+1] );
		}

        zero_acc_bottom_linear[i+1] += links[i].inertia * vel_top_angular[i+1] * (DAMPING_K1_ANGULAR + DAMPING_K2_ANGULAR*vel_top_angular[i+1].norm());

        // calculate Ihat_i^A
        inertia_top_left[i+1] = btMatrix3x3(0,0,0,0,0,0,0,0,0);//::Zero();
        inertia_top_right[i+1].setValue(links[i].mass, 0, 0,
                                  0, links[i].mass, 0,
                                  0, 0, links[i].mass);
        inertia_bottom_left[i+1].setValue(links[i].inertia[0], 0, 0,
                                    0, links[i].inertia[1], 0,
                                    0, 0, links[i].inertia[2]);
    }


    // 'Downward' loop.
    // (part of TreeForwardDynamics in Mirtich.)
    for (int i = num_links - 1; i >= 0; --i) {

        h_top[i] = inertia_top_left[i+1] * links[i].axis_top + inertia_top_right[i+1] * links[i].axis_bottom;
        h_bottom[i] = inertia_bottom_left[i+1] * links[i].axis_top + inertia_top_left[i+1].transpose() * links[i].axis_bottom;
		btScalar val = SpatialDotProduct(links[i].axis_top, links[i].axis_bottom, h_top[i], h_bottom[i]);
        D[i] = val;
		Y[i] = links[i].joint_torque
            - SpatialDotProduct(links[i].axis_top, links[i].axis_bottom, zero_acc_top_angular[i+1], zero_acc_bottom_linear[i+1])
            - SpatialDotProduct(h_top[i], h_bottom[i], coriolis_top_angular[i], coriolis_bottom_linear[i]);

        const int parent = links[i].parent;

        
        // Ip += pXi * (Ii - hi hi' / Di) * iXp
        const btScalar one_over_di = 1.0f / D[i];

		


		const btMatrix3x3 TL = inertia_top_left[i+1]   - vecMulVecTranspose(one_over_di * h_top[i] , h_bottom[i]);
        const btMatrix3x3 TR = inertia_top_right[i+1]  - vecMulVecTranspose(one_over_di * h_top[i] , h_top[i]);
        const btMatrix3x3 BL = inertia_bottom_left[i+1]- vecMulVecTranspose(one_over_di * h_bottom[i] , h_bottom[i]);


        btMatrix3x3 r_cross;
        r_cross.setValue(
            0, -links[i].cached_r_vector[2], links[i].cached_r_vector[1],
            links[i].cached_r_vector[2], 0, -links[i].cached_r_vector[0],
            -links[i].cached_r_vector[1], links[i].cached_r_vector[0], 0);
        
        inertia_top_left[parent+1] += rot_from_parent[i+1].transpose() * ( TL - TR * r_cross ) * rot_from_parent[i+1];
        inertia_top_right[parent+1] += rot_from_parent[i+1].transpose() * TR * rot_from_parent[i+1];
        inertia_bottom_left[parent+1] += rot_from_parent[i+1].transpose() *
            (r_cross * (TL - TR * r_cross) + BL - TL.transpose() * r_cross) * rot_from_parent[i+1];
        
        
        // Zp += pXi * (Zi + Ii*ci + hi*Yi/Di)
        btVector3 in_top, in_bottom, out_top, out_bottom;
        const btScalar Y_over_D = Y[i] * one_over_di;
        in_top = zero_acc_top_angular[i+1]
            + inertia_top_left[i+1] * coriolis_top_angular[i]
            + inertia_top_right[i+1] * coriolis_bottom_linear[i]
            + Y_over_D * h_top[i];
        in_bottom = zero_acc_bottom_linear[i+1]
            + inertia_bottom_left[i+1] * coriolis_top_angular[i]
            + inertia_top_left[i+1].transpose() * coriolis_bottom_linear[i]
            + Y_over_D * h_bottom[i];
        InverseSpatialTransform(rot_from_parent[i+1], links[i].cached_r_vector,
                                in_top, in_bottom, out_top, out_bottom);
        zero_acc_top_angular[parent+1] += out_top;
        zero_acc_bottom_linear[parent+1] += out_bottom;
    }


    // Second 'upward' loop
    // (part of TreeForwardDynamics in Mirtich)

    if (fixed_base) 
	{
        accel_top[0] = accel_bottom[0] = btVector3(0,0,0);
    } 
	else 
	{
        if (num_links > 0) 
		{
            //Matrix<btScalar, 6, 6> Imatrix;
            //Imatrix.block<3,3>(0,0) = inertia_top_left[0];
            //Imatrix.block<3,3>(3,0) = inertia_bottom_left[0];
            //Imatrix.block<3,3>(0,3) = inertia_top_right[0];
            //Imatrix.block<3,3>(3,3) = inertia_top_left[0].transpose();
            //cached_imatrix_lu.reset(new Eigen::LU<Matrix<btScalar, 6, 6> >(Imatrix));  // TODO: Avoid memory allocation here?

			cached_inertia_top_left = inertia_top_left[0];
			cached_inertia_top_right = inertia_top_right[0];
			cached_inertia_lower_left = inertia_bottom_left[0];
			cached_inertia_lower_right= inertia_top_left[0].transpose();

        }
		btVector3 rhs_top (zero_acc_top_angular[0][0], zero_acc_top_angular[0][1], zero_acc_top_angular[0][2]);
		btVector3 rhs_bot (zero_acc_bottom_linear[0][0], zero_acc_bottom_linear[0][1], zero_acc_bottom_linear[0][2]);
        float result[6];

		solveImatrix(rhs_top, rhs_bot, result);
//		printf("result=%f,%f,%f,%f,%f,%f\n",result[0],result[0],result[0],result[0],result[0],result[0]);
        for (int i = 0; i < 3; ++i) {
            accel_top[0][i] = -result[i];
            accel_bottom[0][i] = -result[i+3];
        }

    }

    // now do the loop over the links
    for (int i = 0; i < num_links; ++i) {
        const int parent = links[i].parent;
        SpatialTransform(rot_from_parent[i+1], links[i].cached_r_vector,
                         accel_top[parent+1], accel_bottom[parent+1],
                         accel_top[i+1], accel_bottom[i+1]);
        joint_accel[i] = (Y[i] - SpatialDotProduct(h_top[i], h_bottom[i], accel_top[i+1], accel_bottom[i+1])) / D[i];
        accel_top[i+1] += coriolis_top_angular[i] + joint_accel[i] * links[i].axis_top;
        accel_bottom[i+1] += coriolis_bottom_linear[i] + joint_accel[i] * links[i].axis_bottom;
    }

    // transform base accelerations back to the world frame.
    btVector3 omegadot_out = rot_from_parent[0].transpose() * accel_top[0];
	output[0] = omegadot_out[0];
	output[1] = omegadot_out[1];
	output[2] = omegadot_out[2];

    btVector3 vdot_out = rot_from_parent[0].transpose() * accel_bottom[0];
	output[3] = vdot_out[0];
	output[4] = vdot_out[1];
	output[5] = vdot_out[2];
    // Final step: add the accelerations (times dt) to the velocities.
    applyDeltaVee(output, dt);

	
}
示例#2
0
void BulletConstraintSolver()
{
	btPgsSolver pgs;
	btContactSolverInfo info;
	rbs.resize(0);

	for (int i=0;i<numRigidBodies;i++)
	{
		btRigidBody& rb = rbs.expandNonInitializing();

		rb.m_companionId=-1;
		rb.m_angularFactor.setValue(1,1,1);
		rb.m_anisotropicFriction.setValue(1,1,1);
		
		rb.m_invMass = bodies[i].getMassInv();
		rb.m_linearFactor.setValue(1,1,1);
		btVector3 pos(states[i].getPosition().getX(),states[i].getPosition().getY(),states[i].getPosition().getZ());
		rb.m_worldTransform.setIdentity();
		btQuaternion orn(states[i].getOrientation().getX(),states[i].getOrientation().getY(),states[i].getOrientation().getZ(),states[i].getOrientation().getW());
		rb.m_worldTransform.setRotation(orn);
		rb.m_worldTransform.setOrigin(pos);
		PfxMatrix3 ori(states[i].getOrientation());
		rb.m_worldTransform.setRotation(orn);

		PfxMatrix3 inertiaInvWorld = ori * bodies[i].getInertiaInv() * transpose(ori);
		rb.m_invInertiaWorld.setIdentity();

		if (rb.m_invMass)
		{
			for (int row=0;row<3;row++)
			{
				for (int col=0;col<3;col++)
				{
					rb.m_invInertiaWorld[col][row] = inertiaInvWorld.getElem(col,row);
				}
			}
		} else
		{
			rb.m_invInertiaWorld = btMatrix3x3(0,0,0,0,0,0,0,0,0);
		}
		rb.m_linearVelocity.setValue(states[i].getLinearVelocity().getX(),states[i].getLinearVelocity().getY(),states[i].getLinearVelocity().getZ());
		rb.m_angularVelocity.setValue(states[i].getAngularVelocity().getX(),states[i].getAngularVelocity().getY(),states[i].getAngularVelocity().getZ());
//		printf("body added\n");
	}

	btAlignedObjectArray<btCollisionObject*> bodyPtrs;
	bodyPtrs.resize(rbs.size());
	for (int i=0;i<rbs.size();i++)
	{
		bodyPtrs[i] = &rbs[i];
	}


	unsigned int numCurrentPairs = numPairs[pairSwap];
	PfxBroadphasePair *currentPairs = pairsBuff[pairSwap];

	PfxSetupContactConstraintsParam param;
	param.contactPairs = currentPairs;
	param.numContactPairs = numCurrentPairs;
	param.offsetContactManifolds = contacts;
	param.offsetRigidStates = states;
	param.offsetRigidBodies = bodies;
	param.offsetSolverBodies = solverBodies;
	param.numRigidBodies = numRigidBodies;
	param.timeStep = timeStep;
	param.separateBias = separateBias;

	BulletSetupContactConstraints(param);

	btAlignedObjectArray<btPersistentManifold*> manifoldPtrs;
	manifoldPtrs.resize(manifolds.size());

	for (int i=0;i<manifolds.size();i++)
	{
		manifoldPtrs[i] = &manifolds[i];
	}

	if (bodyPtrs.size() && manifoldPtrs.size())
	{
		pgs.solveGroup(&bodyPtrs[0],bodyPtrs.size(),&manifoldPtrs[0],manifoldPtrs.size(),0,0,info,0,0,0);

		for (int i=0;i<numRigidBodies;i++)
		{
			btVector3 linvel = rbs[i].getLinearVelocity();
			btVector3 angvel = rbs[i].getAngularVelocity();
			states[i].setLinearVelocity(PfxVector3(linvel.getX(),linvel.getY(),linvel.getZ()));
			states[i].setAngularVelocity(PfxVector3(angvel.getX(),angvel.getY(),angvel.getZ()));
		}
	}

	BulletWriteWarmstartContactConstraints(param);



}
void readNodeHierarchy(TiXmlElement* node,btHashMap<btHashString,int>& name2Shape, btAlignedObjectArray<ColladaGraphicsInstance>& visualShapeInstances,  const btMatrix4x4& parentTransMat)
{
	const char* nodeName = node->Attribute("id");
	//printf("processing node %s\n", nodeName);

	
	btMatrix4x4 nodeTrans;
	nodeTrans.setIdentity();

	///todo(erwincoumans) we probably have to read the elements 'translate', 'scale', 'rotate' and 'matrix' in-order and accumulate them...
	{
		for (TiXmlElement* transElem = node->FirstChildElement("matrix");transElem;transElem=node->NextSiblingElement("matrix"))
		{
			if (transElem->GetText())
			{
				btAlignedObjectArray<float> floatArray;
				TokenFloatArray adder(floatArray);
				tokenize(transElem->GetText(),adder);
				if (floatArray.size()==16)
				{
					btMatrix4x4 t(floatArray[0],floatArray[1],floatArray[2],floatArray[3],
									floatArray[4],floatArray[5],floatArray[6],floatArray[7],
									floatArray[8],floatArray[9],floatArray[10],floatArray[11],
									floatArray[12],floatArray[13],floatArray[14],floatArray[15]);

					nodeTrans = nodeTrans*t;
				} else
				{
					b3Warning("Error: expected 16 elements in a <matrix> element, skipping\n");
				}
			}
		}
	}

	{
		for (TiXmlElement* transElem = node->FirstChildElement("translate");transElem;transElem=node->NextSiblingElement("translate"))
		{
			if (transElem->GetText())
			{
				btVector3 pos = getVector3FromXmlText(transElem->GetText());
				//nodePos+= unitScaling*parentScaling*pos;
				btMatrix4x4 t;
				t.setPureTranslation(pos);
				nodeTrans = nodeTrans*t;

			}
		}
	}
	{
		for(TiXmlElement* scaleElem = node->FirstChildElement("scale");
				scaleElem!= NULL; scaleElem= node->NextSiblingElement("scale")) 
		{
			if (scaleElem->GetText())
			{
				btVector3 scaling = getVector3FromXmlText(scaleElem->GetText());
				btMatrix4x4 t;
				t.setPureScaling(scaling);
				nodeTrans = nodeTrans*t;
			}
		}
	}
	{
		for(TiXmlElement* rotateElem = node->FirstChildElement("rotate");
				rotateElem!= NULL; rotateElem= node->NextSiblingElement("rotate")) 
		{
			if (rotateElem->GetText())
			{
				//accumulate orientation
				btVector4 rotate = getVector4FromXmlText(rotateElem->GetText());
				btQuaternion orn(btVector3(rotate),btRadians(rotate[3]));//COLLADA DAE rotate is in degrees, convert to radians
				btMatrix4x4 t;
				t.setPureRotation(orn);
				nodeTrans = nodeTrans*t;
			}
		}
	}
	
	nodeTrans = parentTransMat*nodeTrans;
	
	for (TiXmlElement* instanceGeom = node->FirstChildElement("instance_geometry");
				instanceGeom!=0;
				instanceGeom=instanceGeom->NextSiblingElement("instance_geometry"))
	{
		const char* geomUrl = instanceGeom->Attribute("url");
		//printf("node referring to geom %s\n", geomUrl);
		geomUrl++;
		int* shapeIndexPtr = name2Shape[geomUrl];
		if (shapeIndexPtr)
		{
		//	int index = *shapeIndexPtr;
			//printf("found geom with index %d\n", *shapeIndexPtr);
			ColladaGraphicsInstance& instance = visualShapeInstances.expand();
			instance.m_shapeIndex = *shapeIndexPtr;
			instance.m_worldTransform = nodeTrans;
		} else
		{
			b3Warning("geom not found\n");
		}
	}

	for(TiXmlElement* childNode = node->FirstChildElement("node");
			childNode!= NULL; childNode = childNode->NextSiblingElement("node")) 
	{
		readNodeHierarchy(childNode,name2Shape,visualShapeInstances, nodeTrans);
	}
}
示例#4
0
//--------------------------------------------------------------------------------------
// Create any D3D11 resources that aren't dependant on the back buffer
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D11CreateDevice( ID3D11Device* pd3dDevice, const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc,
                                      void* pUserContext )
{
	
    g_pd3dDevice = pd3dDevice;
 
    HRESULT hr;

    ID3D11DeviceContext* pd3dImmediateContext = DXUTGetD3D11DeviceContext();

    V_RETURN( g_DialogResourceManager.OnD3D11CreateDevice( pd3dDevice, pd3dImmediateContext ) );
    V_RETURN( g_D3DSettingsDlg.OnD3D11CreateDevice( pd3dDevice ) );
    g_pTxtHelper = new CDXUTTextHelper( pd3dDevice, pd3dImmediateContext, &g_DialogResourceManager, 15 );

    D3DXVECTOR3 vCenter( 0.25767413f, -28.503521f, 111.00689f);
    FLOAT fObjectRadius = 378.15607f;

    D3DXMatrixTranslation( &g_mCenterMesh, -vCenter.x, -vCenter.y, -vCenter.z );
    D3DXMATRIXA16 m;
    D3DXMatrixRotationY( &m, D3DX_PI );
    g_mCenterMesh *= m;
    D3DXMatrixRotationX( &m, D3DX_PI / 2.0f );
    g_mCenterMesh *= m;

    // Compile the shaders to a model based on the feature level we acquired
    ID3DBlob* pVertexShaderBuffer = NULL;
	ID3DBlob* pGeometryShaderBuffer = NULL;
    ID3DBlob* pPixelShaderBuffer = NULL;
  
    switch( DXUTGetD3D11DeviceFeatureLevel() )
    {
        case D3D_FEATURE_LEVEL_11_0:
            V_RETURN( CompileShaderFromFile( L"cloth_renderer_VS.hlsl", "VSMain", "vs_5_0" , &pVertexShaderBuffer ) );
			V_RETURN( CompileShaderFromFile( L"cloth_renderer_PS.hlsl", "GSMain", "gs_5_0" , &pGeometryShaderBuffer ) );
            V_RETURN( CompileShaderFromFile( L"cloth_renderer_PS.hlsl", "PSMain", "ps_5_0" , &pPixelShaderBuffer ) );
            break;        
    }

    // Create the shaders
    V_RETURN( pd3dDevice->CreateVertexShader( pVertexShaderBuffer->GetBufferPointer(),
                                              pVertexShaderBuffer->GetBufferSize(), NULL, &g_pVertexShader ) );


	V_RETURN( pd3dDevice->CreateGeometryShader( pGeometryShaderBuffer->GetBufferPointer(),
                                              pGeometryShaderBuffer->GetBufferSize(), NULL, &g_pGeometryShader ) );
    

    V_RETURN( pd3dDevice->CreatePixelShader( pPixelShaderBuffer->GetBufferPointer(),
                                             pPixelShaderBuffer->GetBufferSize(), NULL, &g_pPixelShader ) );

    

    V_RETURN( pd3dDevice->CreateInputLayout( layout, ARRAYSIZE( layout ), pVertexShaderBuffer->GetBufferPointer(),
                                             pVertexShaderBuffer->GetBufferSize(), &g_pVertexLayout11 ) );

    SAFE_RELEASE( pVertexShaderBuffer );
    SAFE_RELEASE( pPixelShaderBuffer );
	SAFE_RELEASE( pGeometryShaderBuffer );


    // Load the mesh
    V_RETURN( g_Mesh11.Create( pd3dDevice, L"tiny\\tiny.sdkmesh", true ) );


    

    // Create a sampler state
    D3D11_SAMPLER_DESC SamDesc;
    SamDesc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
    SamDesc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
    SamDesc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
    SamDesc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
    SamDesc.MipLODBias = 0.0f;
    SamDesc.MaxAnisotropy = 1;
    SamDesc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
    SamDesc.BorderColor[0] = SamDesc.BorderColor[1] = SamDesc.BorderColor[2] = SamDesc.BorderColor[3] = 0;
    SamDesc.MinLOD = 0;
    SamDesc.MaxLOD = D3D11_FLOAT32_MAX;
    V_RETURN( pd3dDevice->CreateSamplerState( &SamDesc, &g_pSamLinear ) );


	

    // Setup constant buffers
    D3D11_BUFFER_DESC Desc;
    Desc.Usage = D3D11_USAGE_DYNAMIC;
    Desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
    Desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
    Desc.MiscFlags = 0;

    Desc.ByteWidth = sizeof( CB_VS_PER_OBJECT );
    V_RETURN( pd3dDevice->CreateBuffer( &Desc, NULL, &g_pcbVSPerObject ) );

    Desc.ByteWidth = sizeof( CB_PS_PER_OBJECT );
    V_RETURN( pd3dDevice->CreateBuffer( &Desc, NULL, &g_pcbPSPerObject ) );

    Desc.ByteWidth = sizeof( CB_PS_PER_FRAME );
    V_RETURN( pd3dDevice->CreateBuffer( &Desc, NULL, &g_pcbPSPerFrame ) );

    // Setup the camera's view parameters
    
	
	D3DXVECTOR3 vecEye( 30.0f, 30.0f, -80.0f );
    D3DXVECTOR3 vecAt ( 10.0f, 20.0f, -0.0f );
    

	g_Camera.SetViewParams( &vecEye, &vecAt );

	cloths.resize(numFlags);

	for( int flagIndex =  0; flagIndex < numFlags; ++flagIndex )
	{
		cloths[flagIndex].create_buffers(clothWidth, clothHeight);
	}

	initBullet();

std::wstring flagTexsName[] = {
		L"atiFlag.bmp",
		L"amdFlag.bmp",
	};
	int numFlagTexs = 2;



	WCHAR flagTexs[2][MAX_PATH];

	HRESULT res = DXUTFindDXSDKMediaFileCch(flagTexs[0],MAX_PATH, flagTexsName[0].c_str());
	res = DXUTFindDXSDKMediaFileCch(flagTexs[1],MAX_PATH, flagTexsName[1].c_str());
	

	for( int flagIndex =  0; flagIndex < numFlags; ++flagIndex )
	{
		cloths[flagIndex].create_texture(flagTexs[flagIndex % numFlagTexs]);
		cloths[flagIndex].x_offset = 0; 
		cloths[flagIndex].y_offset = 0; 
		cloths[flagIndex].z_offset = 0;
	}

	

	my_capsule.create_buffers(50,40);
	my_capsule.create_texture();

	//Turn off backface culling
	D3D11_RASTERIZER_DESC rsDesc;
	ZeroMemory(&rsDesc,sizeof(D3D11_RASTERIZER_DESC) );
	rsDesc.CullMode = D3D11_CULL_NONE;
	rsDesc.FillMode = D3D11_FILL_SOLID;
	
	hr = pd3dDevice->CreateRasterizerState(&rsDesc, &g_pRasterizerState);	
	
	rsDesc.FillMode = D3D11_FILL_WIREFRAME;
	hr = pd3dDevice->CreateRasterizerState(&rsDesc, &g_pRasterizerStateWF);
	
	SAFE_RELEASE(pd3dImmediateContext);


	
    return S_OK;
}
示例#5
0
static inline T				average(const btAlignedObjectArray<T>& items)
{
	const btScalar	n=(btScalar)(items.size()>0?items.size():1);
	return(sum(items)/n);
}
示例#6
0
//--------------------------------------------------------------------------------------
// Render the scene using the D3D11 device
//--------------------------------------------------------------------------------------
void CALLBACK OnD3D11FrameRender( ID3D11Device* pd3dDevice, ID3D11DeviceContext* pd3dImmediateContext, double fTime,
                                  float fElapsedTime, void* pUserContext )
{




	//float ms = getDeltaTimeMicroseconds();
	btScalar dt = (btScalar)m_clock.getTimeMicroseconds();
	m_clock.reset();

	///step the simulation
	if (m_dynamicsWorld && !paused)
	{

		m_dynamicsWorld->stepSimulation(dt / 1000000.f);

		updatePhysicsWorld();
	}

	//paused = 1;
	


	///////////////////////////////////////////////////////

    HRESULT hr;

    // If the settings dialog is being shown, then render it instead of rendering the app's scene
    if( g_D3DSettingsDlg.IsActive() )
    {
        g_D3DSettingsDlg.OnRender( fElapsedTime );
        return;
    }

    // Clear the render target and depth stencil
    float ClearColor[4] = { 0.0f, 0.25f, 0.25f, 0.55f };
    ID3D11RenderTargetView* pRTV = DXUTGetD3D11RenderTargetView();
    pd3dImmediateContext->ClearRenderTargetView( pRTV, ClearColor );
    ID3D11DepthStencilView* pDSV = DXUTGetD3D11DepthStencilView();
    pd3dImmediateContext->ClearDepthStencilView( pDSV, D3D11_CLEAR_DEPTH, 1.0, 0 );


	for( int flagIndex = 0; flagIndex < m_flags.size(); ++flagIndex )
	{	
		g_softBodyOutput->copySoftBodyToVertexBuffer( m_flags[flagIndex], cloths[flagIndex].m_vertexBufferDescriptor );
		cloths[flagIndex].draw();
	}

	my_capsule.draw();

	
    DXUT_BeginPerfEvent( DXUT_PERFEVENTCOLOR, L"HUD / Stats" );
    g_HUD.OnRender( fElapsedTime );
    g_SampleUI.OnRender( fElapsedTime );
    RenderText();
    DXUT_EndPerfEvent();


/*
	 SAFE_RELEASE(pRTV);
     SAFE_RELEASE(pDSV);
*/

 
}
示例#7
0
/**
 * Create a sequence of flag objects and add them to the world.
 */
void createFlag( int width, int height, btAlignedObjectArray<btSoftBody *> &flags )
{
	// First create a triangle mesh to represent a flag

	using namespace BTAcceleratedSoftBody;	
	using Vectormath::Aos::Matrix3;
	using Vectormath::Aos::Vector3;

	// Allocate a simple mesh consisting of a vertex array and a triangle index array
	btIndexedMesh mesh;
	mesh.m_numVertices = width*height;
	mesh.m_numTriangles = 2*(width-1)*(height-1);

	btVector3 *vertexArray = new btVector3[mesh.m_numVertices];

	mesh.m_vertexBase = reinterpret_cast<const unsigned char*>(vertexArray);
	int *triangleVertexIndexArray = new int[3*mesh.m_numTriangles];	
	mesh.m_triangleIndexBase = reinterpret_cast<const unsigned char*>(triangleVertexIndexArray);
	mesh.m_triangleIndexStride = sizeof(int)*3;
	mesh.m_vertexStride = sizeof(Vector3);

	// Generate normalised object space vertex coordinates for a rectangular flag
	float zCoordinate = 0.0f;
	
	Matrix3 defaultScale(Vector3(5.f, 0.f, 0.f), Vector3(0.f, 20.f, 0.f), Vector3(0.f, 0.f, 1.f));
	for( int y = 0; y < height; ++y )
	{
		float yCoordinate = y*2.0f/float(height) - 1.0f;
		for( int x = 0; x < width; ++x )
		{			
			float xCoordinate = x*2.0f/float(width) - 1.0f;

			Vector3 vertex(xCoordinate, yCoordinate, zCoordinate);
			Vector3 transformedVertex = defaultScale*vertex;

			vertexArray[y*width + x] = btVector3(transformedVertex.getX(), transformedVertex.getY(), transformedVertex.getZ() );

		}
	}

	// Generate vertex indices for triangles
	for( int y = 0; y < (height-1); ++y )
	{
		for( int x = 0; x < (width-1); ++x )
		{	
			// Triangle 0
			// Top left of square on mesh
			{
				int vertex0 = y*width + x;
				int vertex1 = vertex0 + 1;
				int vertex2 = vertex0 + width;
				int triangleIndex = 2*y*(width-1) + 2*x;
				triangleVertexIndexArray[(mesh.m_triangleIndexStride*triangleIndex)/sizeof(int)] = vertex0;
				triangleVertexIndexArray[(mesh.m_triangleIndexStride*triangleIndex+1)/sizeof(int)+1] = vertex1;
				triangleVertexIndexArray[(mesh.m_triangleIndexStride*triangleIndex+2)/sizeof(int)+2] = vertex2;
			}

			// Triangle 1
			// Bottom right of square on mesh
			{
				int vertex0 = y*width + x + 1;
				int vertex1 = vertex0 + width;
				int vertex2 = vertex1 - 1;
				int triangleIndex = 2*y*(width-1) + 2*x + 1;
				triangleVertexIndexArray[(mesh.m_triangleIndexStride*triangleIndex)/sizeof(int)] = vertex0;
				triangleVertexIndexArray[(mesh.m_triangleIndexStride*triangleIndex)/sizeof(int)+1] = vertex1;
				triangleVertexIndexArray[(mesh.m_triangleIndexStride*triangleIndex)/sizeof(int)+2] = vertex2;
			}
		}
	}

	
	float rotateAngleRoundZ = 0.5;
	float rotateAngleRoundX = 0.5;
	btMatrix3x3 defaultRotate;
	defaultRotate[0] = btVector3(cos(rotateAngleRoundZ), sin(rotateAngleRoundZ), 0.f); 
	defaultRotate[1] = btVector3(-sin(rotateAngleRoundZ), cos(rotateAngleRoundZ), 0.f);
	defaultRotate[2] = btVector3(0.f, 0.f, 1.f);


	//btMatrix3x3 defaultRotateAndScale( (defaultRotateX*defaultRotate) );
#ifdef TABLETEST
	btMatrix3x3 defaultRotateX;
	rotateAngleRoundX = 3.141592654/2;
	defaultRotateX[0] = btVector3(1.f, 0.f, 0.f);
	defaultRotateX[1] = btVector3( 0.f, cos(rotateAngleRoundX), sin(rotateAngleRoundX));
	defaultRotateX[2] = btVector3(0.f, -sin(rotateAngleRoundX), cos(rotateAngleRoundX));
	btMatrix3x3 defaultRotateAndScale( (defaultRotateX) );
#else
	btMatrix3x3 defaultRotateX;
	defaultRotateX[0] = btVector3(1.f, 0.f, 0.f);
	defaultRotateX[1] = btVector3( 0.f, cos(rotateAngleRoundX), sin(rotateAngleRoundX));
	defaultRotateX[2] = btVector3(0.f, -sin(rotateAngleRoundX), cos(rotateAngleRoundX));
	btMatrix3x3 defaultRotateAndScale( (defaultRotateX) );
#endif


	// Construct the sequence flags applying a slightly different translation to each one to arrange them
	// appropriately in the scene.
	for( int i = 0; i < numFlags; ++i )
	{
		float zTranslate = flagSpacing * (i-numFlags/2);

		btVector3 defaultTranslate(0.f, 20.f, zTranslate);

		btTransform transform( defaultRotateAndScale, defaultTranslate );


		btSoftBody *softBody = createFromIndexedMesh( vertexArray, mesh.m_numVertices, triangleVertexIndexArray, mesh.m_numTriangles, true );


		for( int i = 0; i < mesh.m_numVertices; ++i )
		{
			softBody->setMass(i, 10.f/mesh.m_numVertices);
		}

#ifndef TABLETEST
		// Set the fixed points
		softBody->setMass((height-1)*(width), 0.f);
		softBody->setMass((height-1)*(width) + width - 1, 0.f);
		softBody->setMass((height-1)*width + width/2, 0.f);
#endif

		softBody->m_cfg.collisions = btSoftBody::fCollision::CL_SS+btSoftBody::fCollision::CL_RS;	
		softBody->m_cfg.kLF = 0.0005f;
		softBody->m_cfg.kVCF = 0.001f;
		softBody->m_cfg.kDP = 0.f;
		softBody->m_cfg.kDG = 0.f;
		
		flags.push_back( softBody );

		softBody->transform( transform );
		softBody->setFriction( 0.8f );
		m_dynamicsWorld->addSoftBody( softBody );
	}

	delete [] vertexArray;
	delete [] triangleVertexIndexArray;
}
示例#8
0
void PhysicsClient::submitCommand(int command)
{
	m_userCommandRequests.push_back(command);
	b3Printf("User submitted command request  %d (outstanding %d)\n",command, m_userCommandRequests.size());
}
示例#9
0
void VoronoiFractureDemo::voronoiConvexHullShatter(const btAlignedObjectArray<btVector3>& points, const btAlignedObjectArray<btVector3>& verts, const btQuaternion& bbq, const btVector3& bbt, btScalar matDensity) {
	// points define voronoi cells in world space (avoid duplicates)
	// verts = source (convex hull) mesh vertices in local space
	// bbq & bbt = source (convex hull) mesh quaternion rotation and translation
	// matDensity = Material density for voronoi shard mass calculation
	btConvexHullComputer* convexHC = new btConvexHullComputer();
	btAlignedObjectArray<btVector3> vertices, chverts;
	btVector3 rbb, nrbb;
	btScalar nlength, maxDistance, distance;
	btAlignedObjectArray<btVector3> sortedVoronoiPoints;
	sortedVoronoiPoints.copyFromArray(points);
	btVector3 normal, plane;
	btAlignedObjectArray<btVector3> planes, convexPlanes;
	std::set<int> planeIndices;
	std::set<int>::iterator planeIndicesIter;
	int numplaneIndices;
	int cellnum = 0;
	int i, j, k;

	// Convert verts to world space and get convexPlanes
	int numverts = verts.size();
	chverts.resize(verts.size());
	for (i=0; i < numverts ;i++) {
		chverts[i] = quatRotate(bbq, verts[i]) + bbt;
	}
	//btGeometryUtil::getPlaneEquationsFromVertices(chverts, convexPlanes);
	// Using convexHullComputer faster than getPlaneEquationsFromVertices for large meshes...
	convexHC->compute(&chverts[0].getX(), sizeof(btVector3), numverts, 0.0, 0.0);
	int numFaces = convexHC->faces.size();
	int v0, v1, v2; // vertices
	for (i=0; i < numFaces; i++) {
		const btConvexHullComputer::Edge* edge = &convexHC->edges[convexHC->faces[i]];
		v0 = edge->getSourceVertex();
		v1 = edge->getTargetVertex();
		edge = edge->getNextEdgeOfFace();
		v2 = edge->getTargetVertex();
		plane = (convexHC->vertices[v1]-convexHC->vertices[v0]).cross(convexHC->vertices[v2]-convexHC->vertices[v0]).normalize();
		plane[3] = -plane.dot(convexHC->vertices[v0]);
		convexPlanes.push_back(plane);
	}
	const int numconvexPlanes = convexPlanes.size();

	int numpoints = points.size();
	for (i=0; i < numpoints ;i++) {
		curVoronoiPoint = points[i];
		planes.copyFromArray(convexPlanes);
		for (j=0; j < numconvexPlanes ;j++) {
			planes[j][3] += planes[j].dot(curVoronoiPoint);
		}
		maxDistance = SIMD_INFINITY;
		sortedVoronoiPoints.heapSort(pointCmp());
		for (j=1; j < numpoints; j++) {
			normal = sortedVoronoiPoints[j] - curVoronoiPoint;
			nlength = normal.length();
			if (nlength > maxDistance)
				break;
			plane = normal.normalized();
			plane[3] = -nlength / btScalar(2.);
			planes.push_back(plane);
			getVerticesInsidePlanes(planes, vertices, planeIndices);
			if (vertices.size() == 0)
				break;
			numplaneIndices = planeIndices.size();
			if (numplaneIndices != planes.size()) {
				planeIndicesIter = planeIndices.begin();
				for (k=0; k < numplaneIndices; k++) {
					if (k != *planeIndicesIter)
						planes[k] = planes[*planeIndicesIter];
					planeIndicesIter++;
				}
				planes.resize(numplaneIndices);
			}
			maxDistance = vertices[0].length();
			for (k=1; k < vertices.size(); k++) {
				distance = vertices[k].length();
				if (maxDistance < distance)
					maxDistance = distance;
			}
			maxDistance *= btScalar(2.);
		}
		if (vertices.size() == 0)
			continue;

		// Clean-up voronoi convex shard vertices and generate edges & faces
		convexHC->compute(&vertices[0].getX(), sizeof(btVector3), vertices.size(),0.0,0.0);

		// At this point we have a complete 3D voronoi shard mesh contained in convexHC

		// Calculate volume and center of mass (Stan Melax volume integration)
		numFaces = convexHC->faces.size();
		btScalar volume = btScalar(0.);
		btVector3 com(0., 0., 0.);
		for (j=0; j < numFaces; j++) {
			const btConvexHullComputer::Edge* edge = &convexHC->edges[convexHC->faces[j]];
			v0 = edge->getSourceVertex();
			v1 = edge->getTargetVertex();
			edge = edge->getNextEdgeOfFace();
			v2 = edge->getTargetVertex();
			while (v2 != v0) {
				// Counter-clockwise triangulated voronoi shard mesh faces (v0-v1-v2) and edges here...
				btScalar vol = convexHC->vertices[v0].triple(convexHC->vertices[v1], convexHC->vertices[v2]);
				volume += vol;
				com += vol * (convexHC->vertices[v0] + convexHC->vertices[v1] + convexHC->vertices[v2]);
				edge = edge->getNextEdgeOfFace();
				v1 = v2;
				v2 = edge->getTargetVertex();
			}
		}
		com /= volume * btScalar(4.);
		volume /= btScalar(6.);

		// Shift all vertices relative to center of mass
		int numVerts = convexHC->vertices.size();
		for (j=0; j < numVerts; j++)
		{
			convexHC->vertices[j] -= com;
		}

		// Note:
		// At this point convex hulls contained in convexHC should be accurate (line up flush with other pieces, no cracks),
		// ...however Bullet Physics rigid bodies demo visualizations appear to produce some visible cracks.
		// Use the mesh in convexHC for visual display or to perform boolean operations with.

		// Create Bullet Physics rigid body shards
		btCollisionShape* shardShape = new btConvexHullShape(&(convexHC->vertices[0].getX()), convexHC->vertices.size());
		shardShape->setMargin(CONVEX_MARGIN); // for this demo; note convexHC has optional margin parameter for this
		m_collisionShapes.push_back(shardShape);
		btTransform shardTransform;
		shardTransform.setIdentity();
		shardTransform.setOrigin(curVoronoiPoint + com); // Shard's adjusted location
		btDefaultMotionState* shardMotionState = new btDefaultMotionState(shardTransform);
		btScalar shardMass(volume * matDensity);
		btVector3 shardInertia(0.,0.,0.);
		shardShape->calculateLocalInertia(shardMass, shardInertia);
		btRigidBody::btRigidBodyConstructionInfo shardRBInfo(shardMass, shardMotionState, shardShape, shardInertia);
		btRigidBody* shardBody = new btRigidBody(shardRBInfo);
		m_dynamicsWorld->addRigidBody(shardBody);

		cellnum ++;

	}
	printf("Generated %d voronoi btRigidBody shards\n", cellnum);
}
示例#10
0
void	PhysicsClient::initPhysics()
{
	if (m_guiHelper && m_guiHelper->getParameterInterface())
	{
		{
			bool isTrigger = false;
			ButtonParams button("Load URDF",CMD_LOAD_URDF,  isTrigger);
			button.m_callback = MyCallback;
			button.m_userPointer = this;
			m_guiHelper->getParameterInterface()->registerButtonParameter(button);
		}

		{
			bool isTrigger = false;
			ButtonParams button("Step Sim",CMD_STEP_FORWARD_SIMULATION,  isTrigger);
			button.m_callback = MyCallback;
			button.m_userPointer = this;
			m_guiHelper->getParameterInterface()->registerButtonParameter(button);
		}

		{
			bool isTrigger = false;
			ButtonParams button("Get State",CMD_REQUEST_ACTUAL_STATE,  isTrigger);
			button.m_callback = MyCallback;
			button.m_userPointer = this;
			m_guiHelper->getParameterInterface()->registerButtonParameter(button);
		}
		
		{
			bool isTrigger = false;
			ButtonParams button("Send Desired State",CMD_SEND_DESIRED_STATE,  isTrigger);
			button.m_callback = MyCallback;
			button.m_userPointer = this;
			m_guiHelper->getParameterInterface()->registerButtonParameter(button);
		}
		
		{
			bool isTrigger = false;
			ButtonParams button("Shut Down",CMD_SHUTDOWN,  isTrigger);
			button.m_callback = MyCallback;
			button.m_userPointer = this;
			m_guiHelper->getParameterInterface()->registerButtonParameter(button);
		}
	} else
	{
		m_userCommandRequests.push_back(CMD_LOAD_URDF);
		m_userCommandRequests.push_back(CMD_REQUEST_ACTUAL_STATE);
		//m_userCommandRequests.push_back(CMD_SEND_DESIRED_STATE);
		m_userCommandRequests.push_back(CMD_REQUEST_ACTUAL_STATE);
		//m_userCommandRequests.push_back(CMD_SET_JOINT_FEEDBACK);
		//m_userCommandRequests.push_back(CMD_CREATE_BOX_COLLISION_SHAPE);
		//m_userCommandRequests.push_back(CMD_CREATE_RIGID_BODY);
		m_userCommandRequests.push_back(CMD_STEP_FORWARD_SIMULATION);
		m_userCommandRequests.push_back(CMD_REQUEST_ACTUAL_STATE);
		m_userCommandRequests.push_back(CMD_SHUTDOWN);
		
	}


    m_testBlock1 = (SharedMemoryExampleData*)m_sharedMemory->allocateSharedMemory(SHARED_MEMORY_KEY, SHARED_MEMORY_SIZE);
    if (m_testBlock1)
    {
     //   btAssert(m_testBlock1->m_magicId == SHARED_MEMORY_MAGIC_NUMBER);
        if (m_testBlock1->m_magicId !=SHARED_MEMORY_MAGIC_NUMBER)
        {
            b3Error("Error: please start server before client\n");
            m_sharedMemory->releaseSharedMemory(SHARED_MEMORY_KEY, SHARED_MEMORY_SIZE);
            m_testBlock1 = 0;
        } else
		{
			b3Printf("Shared Memory status is OK\n");
		}
    } else
	{
		m_wantsTermination = true;
	}
}
示例#11
0
void	PhysicsClient::createClientCommand()
{
	if (!m_waitingForServer)
		{
			//process outstanding requests
			if (m_userCommandRequests.size())
			{
				b3Printf("Outstanding user command requests: %d\n", m_userCommandRequests.size());
				int command = m_userCommandRequests[0];
				
				//don't use 'remove' because it will re-order the commands
				//m_userCommandRequests.remove(command);
				//pop_front
				for (int i=1;i<m_userCommandRequests.size();i++)
				{
					m_userCommandRequests[i-1] = m_userCommandRequests[i];
				}

				m_userCommandRequests.pop_back();
				m_waitingForServer = true;

				switch (command)
				{
				case CMD_LOAD_URDF:
					{
						if (!m_serverLoadUrdfOK)
						{
							m_testBlock1->m_clientCommands[0].m_type =CMD_LOAD_URDF;
							sprintf(m_testBlock1->m_clientCommands[0].m_urdfArguments.m_urdfFileName,"r2d2.urdf");
							m_testBlock1->m_clientCommands[0].m_urdfArguments.m_useFixedBase = false;
							m_testBlock1->m_clientCommands[0].m_urdfArguments.m_useMultiBody = true;

							m_testBlock1->m_numClientCommands++;
							b3Printf("Client created CMD_LOAD_URDF\n");
						} else
						{
							b3Warning("Server already loaded URDF, no client command submitted\n");
						}
						break;
					}
				case CMD_REQUEST_ACTUAL_STATE:
					{
						if (m_serverLoadUrdfOK)
						{
							b3Printf("Requesting actual state\n");
							m_testBlock1->m_clientCommands[0].m_type =CMD_REQUEST_ACTUAL_STATE;
							m_testBlock1->m_numClientCommands++;

						} else
						{
							b3Warning("No URDF loaded\n");
						}
						break;
					}
				case CMD_STEP_FORWARD_SIMULATION:
					{
						if (m_serverLoadUrdfOK)
						{
						
							m_testBlock1->m_clientCommands[0].m_type =CMD_STEP_FORWARD_SIMULATION;
							m_testBlock1->m_clientCommands[0].m_stepSimulationArguments.m_deltaTimeInSeconds = 1./60.;
							m_testBlock1->m_numClientCommands++;
							b3Printf("client created CMD_STEP_FORWARD_SIMULATION %d\n", m_counter++);
						} else
						{
							b3Warning("No URDF loaded yet, no client CMD_STEP_FORWARD_SIMULATION submitted\n");
						}
						break;
					}
				case CMD_SHUTDOWN:
					{
						m_wantsTermination = true;
						m_testBlock1->m_clientCommands[0].m_type =CMD_SHUTDOWN;
						m_testBlock1->m_numClientCommands++;
						m_serverLoadUrdfOK = false;
						b3Printf("client created CMD_SHUTDOWN\n");
						break;
					}
				default:
					{
						b3Error("unknown command requested\n");
					}
				}
			}
		}

}
///@todo: this is random access, it can be walked 'cache friendly'!
void btSimulationIslandManager::buildAndProcessIslands( btDispatcher* dispatcher,
                                                        btCollisionWorld* collisionWorld,
                                                        btAlignedObjectArray<btTypedConstraint*>& constraints,
                                                        IslandCallback* callback
                                                        )
{
	btCollisionObjectArray& collisionObjects = collisionWorld->getCollisionObjectArray();

	buildIslands(dispatcher,collisionWorld);

	BT_PROFILE("processIslands");

	if(!m_splitIslands)
	{
        btPersistentManifold** manifolds = dispatcher->getInternalManifoldPointer();
        int maxNumManifolds = dispatcher->getNumManifolds();

        for ( int i = 0; i < maxNumManifolds; i++ )
        {
            btPersistentManifold* manifold = manifolds[ i ];

            const btCollisionObject* colObj0 = static_cast<const btCollisionObject*>( manifold->getBody0() );
            const btCollisionObject* colObj1 = static_cast<const btCollisionObject*>( manifold->getBody1() );

            ///@todo: check sleeping conditions!
            if ( ( ( colObj0 ) && colObj0->getActivationState() != ISLAND_SLEEPING ) ||
                 ( ( colObj1 ) && colObj1->getActivationState() != ISLAND_SLEEPING ) )
            {

                //kinematic objects don't merge islands, but wake up all connected objects
                if ( colObj0->isKinematicObject() && colObj0->getActivationState() != ISLAND_SLEEPING )
                {
                    if ( colObj0->hasContactResponse() )
                        colObj1->activate();
                }
                if ( colObj1->isKinematicObject() && colObj1->getActivationState() != ISLAND_SLEEPING )
                {
                    if ( colObj1->hasContactResponse() )
                        colObj0->activate();
                }
            }
        }
        btTypedConstraint** constraintsPtr = constraints.size() ? &constraints[ 0 ] : NULL;
		callback->processIsland(&collisionObjects[0],
                                 collisionObjects.size(),
                                 manifolds,
                                 maxNumManifolds,
                                 constraintsPtr,
                                 constraints.size(),
                                 -1
                                 );
	}
	else
	{
        initIslandPools();

        //traverse the simulation islands, and call the solver, unless all objects are sleeping/deactivated
        addBodiesToIslands( collisionWorld );
        addManifoldsToIslands( dispatcher );
        addConstraintsToIslands( constraints );

        // m_activeIslands array should now contain all non-sleeping Islands, and each Island should
        // have all the necessary bodies, manifolds and constraints.

        // if we want to merge islands with small batch counts,
        if ( m_minimumSolverBatchSize > 1 )
        {
            mergeIslands();
        }
        // dispatch islands to solver
        m_islandDispatch( &m_activeIslands, callback );
	}
}
示例#13
0
void btMultiBody::fillContactJacobian(int link,
                                    const btVector3 &contact_point,
                                    const btVector3 &normal,
                                    btScalar *jac,
                                    btAlignedObjectArray<btScalar> &scratch_r,
                                    btAlignedObjectArray<btVector3> &scratch_v,
                                    btAlignedObjectArray<btMatrix3x3> &scratch_m) const
{
    // temporary space
	int num_links = getNumLinks();
    scratch_v.resize(2*num_links + 2);
    scratch_m.resize(num_links + 1);

    btVector3 * v_ptr = &scratch_v[0];
    btVector3 * p_minus_com = v_ptr; v_ptr += num_links + 1;
    btVector3 * n_local = v_ptr; v_ptr += num_links + 1;
    btAssert(v_ptr - &scratch_v[0] == scratch_v.size());

    scratch_r.resize(num_links);
    btScalar * results = num_links > 0 ? &scratch_r[0] : 0;

    btMatrix3x3 * rot_from_world = &scratch_m[0];

    const btVector3 p_minus_com_world = contact_point - base_pos;

    rot_from_world[0] = btMatrix3x3(base_quat);

    p_minus_com[0] = rot_from_world[0] * p_minus_com_world;
    n_local[0] = rot_from_world[0] * normal;
    
    // omega coeffients first.
    btVector3 omega_coeffs;
    omega_coeffs = p_minus_com_world.cross(normal);
	jac[0] = omega_coeffs[0];
	jac[1] = omega_coeffs[1];
	jac[2] = omega_coeffs[2];
    // then v coefficients
    jac[3] = normal[0];
    jac[4] = normal[1];
    jac[5] = normal[2];

    // Set remaining jac values to zero for now.
    for (int i = 6; i < 6 + num_links; ++i) {
        jac[i] = 0;
    }

    // Qdot coefficients, if necessary.
    if (num_links > 0 && link > -1) {

        // TODO: speed this up -- don't calculate for links we don't need.
        // (Also, we are making 3 separate calls to this function, for the normal & the 2 friction directions,
        // which is resulting in repeated work being done...)

        // calculate required normals & positions in the local frames.
        for (int i = 0; i < num_links; ++i) {

            // transform to local frame
            const int parent = links[i].parent;
            const btMatrix3x3 mtx(links[i].cached_rot_parent_to_this);
            rot_from_world[i+1] = mtx * rot_from_world[parent+1];

            n_local[i+1] = mtx * n_local[parent+1];
            p_minus_com[i+1] = mtx * p_minus_com[parent+1] - links[i].cached_r_vector;

            // calculate the jacobian entry
            if (links[i].is_revolute) {
                results[i] = n_local[i+1].dot( links[i].axis_top.cross(p_minus_com[i+1]) + links[i].axis_bottom );
            } else {
                results[i] = n_local[i+1].dot( links[i].axis_bottom );
            }
        }

        // Now copy through to output.
        while (link != -1) {
            jac[6 + link] = results[link];
            link = links[link].parent;
        }
    }
}
示例#14
0
void btMultiBody::calcAccelerationDeltas(const btScalar *force, btScalar *output,
                                       btAlignedObjectArray<btScalar> &scratch_r, btAlignedObjectArray<btVector3> &scratch_v) const
{
    // Temporary matrices/vectors -- use scratch space from caller
    // so that we don't have to keep reallocating every frame
	int num_links = getNumLinks();
    scratch_r.resize(num_links);
    scratch_v.resize(4*num_links + 4);

    btScalar * r_ptr = num_links == 0 ? 0 : &scratch_r[0];
    btVector3 * v_ptr = &scratch_v[0];
    
    // zhat_i^A (scratch space)
    btVector3 * zero_acc_top_angular = v_ptr; v_ptr += num_links + 1;
    btVector3 * zero_acc_bottom_linear = v_ptr; v_ptr += num_links + 1;

    // rot_from_parent (cached from calcAccelerations)
    const btMatrix3x3 * rot_from_parent = &matrix_buf[0];

    // hhat (cached), accel (scratch)
    const btVector3 * h_top = num_links > 0 ? &vector_buf[0] : 0;
    const btVector3 * h_bottom = num_links > 0 ? &vector_buf[num_links] : 0;
    btVector3 * accel_top = v_ptr; v_ptr += num_links + 1;
    btVector3 * accel_bottom = v_ptr; v_ptr += num_links + 1;

    // Y_i (scratch), D_i (cached)
    btScalar * Y = r_ptr; r_ptr += num_links;
    const btScalar * D = num_links > 0 ? &m_real_buf[6 + num_links] : 0;

    btAssert(num_links == 0 || r_ptr - &scratch_r[0] == scratch_r.size());
    btAssert(v_ptr - &scratch_v[0] == scratch_v.size());


    
    // First 'upward' loop.
    // Combines CompTreeLinkVelocities and InitTreeLinks from Mirtich.

    btVector3 input_force(force[3],force[4],force[5]);
    btVector3 input_torque(force[0],force[1],force[2]);
    
    // Fill in zero_acc
    // -- set to force/torque on the base, zero otherwise
    if (fixed_base) 
	{
        zero_acc_top_angular[0] = zero_acc_bottom_linear[0] = btVector3(0,0,0);
    } else 
	{
        zero_acc_top_angular[0] = - (rot_from_parent[0] * input_force);
        zero_acc_bottom_linear[0] =  - (rot_from_parent[0] * input_torque);
    }
    for (int i = 0; i < num_links; ++i) 
	{
        zero_acc_top_angular[i+1] = zero_acc_bottom_linear[i+1] = btVector3(0,0,0);
    }

    // 'Downward' loop.
    for (int i = num_links - 1; i >= 0; --i) 
	{

        Y[i] = - SpatialDotProduct(links[i].axis_top, links[i].axis_bottom, zero_acc_top_angular[i+1], zero_acc_bottom_linear[i+1]);
        Y[i] += force[6 + i];  // add joint torque
        
        const int parent = links[i].parent;
        
        // Zp += pXi * (Zi + hi*Yi/Di)
        btVector3 in_top, in_bottom, out_top, out_bottom;
        const btScalar Y_over_D = Y[i] / D[i];
        in_top = zero_acc_top_angular[i+1] + Y_over_D * h_top[i];
        in_bottom = zero_acc_bottom_linear[i+1] + Y_over_D * h_bottom[i];
        InverseSpatialTransform(rot_from_parent[i+1], links[i].cached_r_vector,
                                in_top, in_bottom, out_top, out_bottom);
        zero_acc_top_angular[parent+1] += out_top;
        zero_acc_bottom_linear[parent+1] += out_bottom;
    }

    // ptr to the joint accel part of the output
    btScalar * joint_accel = output + 6;

    // Second 'upward' loop
    if (fixed_base) 
	{
        accel_top[0] = accel_bottom[0] = btVector3(0,0,0);
    } else 
	{
		btVector3 rhs_top (zero_acc_top_angular[0][0], zero_acc_top_angular[0][1], zero_acc_top_angular[0][2]);
		btVector3 rhs_bot (zero_acc_bottom_linear[0][0], zero_acc_bottom_linear[0][1], zero_acc_bottom_linear[0][2]);
		
		float result[6];
        solveImatrix(rhs_top,rhs_bot, result);
	//	printf("result=%f,%f,%f,%f,%f,%f\n",result[0],result[0],result[0],result[0],result[0],result[0]);

        for (int i = 0; i < 3; ++i) {
            accel_top[0][i] = -result[i];
            accel_bottom[0][i] = -result[i+3];
        }

    }
    
    // now do the loop over the links
    for (int i = 0; i < num_links; ++i) {
        const int parent = links[i].parent;
        SpatialTransform(rot_from_parent[i+1], links[i].cached_r_vector,
                         accel_top[parent+1], accel_bottom[parent+1],
                         accel_top[i+1], accel_bottom[i+1]);
        joint_accel[i] = (Y[i] - SpatialDotProduct(h_top[i], h_bottom[i], accel_top[i+1], accel_bottom[i+1])) / D[i];
        accel_top[i+1] += joint_accel[i] * links[i].axis_top;
        accel_bottom[i+1] += joint_accel[i] * links[i].axis_bottom;
    }

    // transform base accelerations back to the world frame.
    btVector3 omegadot_out;
    omegadot_out = rot_from_parent[0].transpose() * accel_top[0];
	output[0] = omegadot_out[0];
	output[1] = omegadot_out[1];
	output[2] = omegadot_out[2];

    btVector3 vdot_out;
    vdot_out = rot_from_parent[0].transpose() * accel_bottom[0];

	output[3] = vdot_out[0];
	output[4] = vdot_out[1];
	output[5] = vdot_out[2];
}
	virtual void ConvexDecompResult(ConvexDecomposition::ConvexResult &result)
	{

		//calc centroid, to shift vertices around center of mass
		btVector3 centroid(0,0,0);
		btAlignedObjectArray<btVector3> vertices;

		if(m_transformSubShapes)
		{

			//const unsigned int *src = result.mHullIndices;
			for (unsigned int i=0; i<result.mHullVcount; i++)
			{
				btVector3 vertex(result.mHullVertices[i*3],result.mHullVertices[i*3+1],result.mHullVertices[i*3+2]);

				centroid += vertex;

			}
			centroid *= 1.f/(float(result.mHullVcount) );
		}

		// collect vertices
		for (unsigned int i=0; i<result.mHullVcount; i++)
		{
			btVector3 vertex(result.mHullVertices[i*3],result.mHullVertices[i*3+1],result.mHullVertices[i*3+2]);

			if(m_transformSubShapes)
			{
				vertex -= centroid ;
			}
			vertices.push_back(vertex);
		}

		// build convex shape

		btCollisionShape* convexShape = new btConvexHullShape(
				&(vertices[0].getX()),vertices.size(),sizeof(btVector3));
		m_convexShapes.push_back(convexShape);

		convexShape->setMargin(m_compoundShape->getMargin());

		if(m_transformSubShapes)
		{
			btTransform trans;
			trans.setIdentity();
			trans.setOrigin(centroid);

			// add convex shape

			m_compoundShape->addChildShape(trans,convexShape);
		}
		else
		{
			btTransform trans;
			trans.setIdentity();
			//trans.setOrigin(centroid);

			// add convex shape

			m_compoundShape->addChildShape(trans,convexShape);

			//m_compoundShape->addChildShape(convexShape);
		}
	}
			virtual void ConvexDecompResult(ConvexDecomposition::ConvexResult &result)
			{

				btTriangleMesh* trimesh = new btTriangleMesh();
				m_convexDemo->m_trimeshes.push_back(trimesh);

				btVector3 localScaling(6.f,6.f,6.f);

				//export data to .obj
				printf("ConvexResult. ");
				if (mOutputFile)
				{
					fprintf(mOutputFile,"## Hull Piece %d with %d vertices and %d triangles.\r\n", mHullCount, result.mHullVcount, result.mHullTcount );

					fprintf(mOutputFile,"usemtl Material%i\r\n",mBaseCount);
					fprintf(mOutputFile,"o Object%i\r\n",mBaseCount);

					for (unsigned int i=0; i<result.mHullVcount; i++)
					{
						const float *p = &result.mHullVertices[i*3];
						fprintf(mOutputFile,"v %0.9f %0.9f %0.9f\r\n", p[0], p[1], p[2] );
					}

					//calc centroid, to shift vertices around center of mass
					centroid.setValue(0,0,0);

					btAlignedObjectArray<btVector3> vertices;
					if ( 1 )
					{
						//const unsigned int *src = result.mHullIndices;
						for (unsigned int i=0; i<result.mHullVcount; i++)
						{
							btVector3 vertex(result.mHullVertices[i*3],result.mHullVertices[i*3+1],result.mHullVertices[i*3+2]);
							vertex *= localScaling;
							centroid += vertex;
							
						}
					}

					centroid *= 1.f/(float(result.mHullVcount) );

					if ( 1 )
					{
						//const unsigned int *src = result.mHullIndices;
						for (unsigned int i=0; i<result.mHullVcount; i++)
						{
							btVector3 vertex(result.mHullVertices[i*3],result.mHullVertices[i*3+1],result.mHullVertices[i*3+2]);
							vertex *= localScaling;
							vertex -= centroid ;
							vertices.push_back(vertex);
						}
					}
					
			

					if ( 1 )
					{
						const unsigned int *src = result.mHullIndices;
						for (unsigned int i=0; i<result.mHullTcount; i++)
						{
							unsigned int index0 = *src++;
							unsigned int index1 = *src++;
							unsigned int index2 = *src++;


							btVector3 vertex0(result.mHullVertices[index0*3], result.mHullVertices[index0*3+1],result.mHullVertices[index0*3+2]);
							btVector3 vertex1(result.mHullVertices[index1*3], result.mHullVertices[index1*3+1],result.mHullVertices[index1*3+2]);
							btVector3 vertex2(result.mHullVertices[index2*3], result.mHullVertices[index2*3+1],result.mHullVertices[index2*3+2]);
							vertex0 *= localScaling;
							vertex1 *= localScaling;
							vertex2 *= localScaling;
							
							vertex0 -= centroid;
							vertex1 -= centroid;
							vertex2 -= centroid;


							trimesh->addTriangle(vertex0,vertex1,vertex2);

							index0+=mBaseCount;
							index1+=mBaseCount;
							index2+=mBaseCount;
							
							fprintf(mOutputFile,"f %d %d %d\r\n", index0+1, index1+1, index2+1 );
						}
					}

				//	float mass = 1.f;
					

//this is a tools issue: due to collision margin, convex objects overlap, compensate for it here:
//#define SHRINK_OBJECT_INWARDS 1
#ifdef SHRINK_OBJECT_INWARDS

					float collisionMargin = 0.01f;
					
					btAlignedObjectArray<btVector3> planeEquations;
					btGeometryUtil::getPlaneEquationsFromVertices(vertices,planeEquations);

					btAlignedObjectArray<btVector3> shiftedPlaneEquations;
					for (int p=0;p<planeEquations.size();p++)
					{
						btVector3 plane = planeEquations[p];
						plane[3] += collisionMargin;
						shiftedPlaneEquations.push_back(plane);
					}
					btAlignedObjectArray<btVector3> shiftedVertices;
					btGeometryUtil::getVerticesFromPlaneEquations(shiftedPlaneEquations,shiftedVertices);

					
					btConvexHullShape* convexShape = new btConvexHullShape(&(shiftedVertices[0].getX()),shiftedVertices.size());
					
#else //SHRINK_OBJECT_INWARDS
					
					btConvexHullShape* convexShape = new btConvexHullShape(&(vertices[0].getX()),vertices.size());
#endif 

					convexShape->setMargin(0.01f);
					m_convexShapes.push_back(convexShape);
					m_convexCentroids.push_back(centroid);
					m_convexDemo->m_collisionShapes.push_back(convexShape);
					mBaseCount+=result.mHullVcount; // advance the 'base index' counter.


				}
			}
示例#17
0
ImportSDFSetup::ImportSDFSetup(struct GUIHelperInterface* helper, int option, const char* fileName)
	:CommonMultiBodyBase(helper)
{
	m_data = new ImportSDFInternalData;
	(void)option;

//	if (option==1)
//	{
		m_useMultiBody = true;
//
//	} else
//	{
//		m_useMultiBody = false;
//	}

	static int count = 0;
	if (fileName)
	{
		setFileName(fileName);
	} else
	{
		gFileNameArray.clear();
		


		//load additional urdf file names from file

		FILE* f = fopen("sdf_files.txt","r");
		if (f)
		{
			int result;
			//warning: we don't avoid string buffer overflow in this basic example in fscanf
			char fileName[1024];
			do
			{
				result = fscanf(f,"%s",fileName);
                b3Printf("sdf_files.txt entry %s",fileName);
				if (result==1)
				{
					gFileNameArray.push_back(fileName);
				}
			} while (result==1);

			fclose(f);
		}
		
		if (gFileNameArray.size()==0)
		{
			gFileNameArray.push_back("two_cubes.sdf");

		}

		int numFileNames = gFileNameArray.size();

		if (count>=numFileNames)
		{
			count=0;
		}
		sprintf(m_fileName,"%s",gFileNameArray[count++].c_str());
	}
}
示例#18
0
void InitShaders()
{
	
	btOverlappingPairCache* overlappingPairCache=0;
	int maxObjects = btMax(256,NUM_OBJECTS);
#ifdef	USE_NEW
	int maxPairsSmallProxy = 32;

	sBroadphase = new btGridBroadphaseCl(overlappingPairCache,btVector3(4.f, 4.f, 4.f), 128, 128, 128,maxObjects, maxObjects, maxPairsSmallProxy, 100.f, 128,
		g_cxMainContext ,g_device,g_cqCommandQue, g_deviceCL);
#else
	sBroadphase = new btGpu3DGridBroadphase(btVector3(2.f, 2.f, 2.f), 32, 32, 32,maxObjects, maxObjects, 64, 100.f, 64);
#endif



//	sBroadphase = new bt3dGridBroadphaseOCL(overlappingPairCache,btVector3(10.f, 10.f, 10.f), 32, 32, 32,NUM_OBJECTS, NUM_OBJECTS, 64, 100.f, 16,
//		g_cxMainContext ,g_device,g_cqCommandQue);



	bool loadFromFile = false;
	instancingShader = gltLoadShaderPair("instancing.vs","instancing.fs", loadFromFile);

	glLinkProgram(instancingShader);
	glUseProgram(instancingShader);
	angle_loc = glGetUniformLocation(instancingShader, "angle");
	ModelViewMatrix = glGetUniformLocation(instancingShader, "ModelViewMatrix");
	ProjectionMatrix = glGetUniformLocation(instancingShader, "ProjectionMatrix");
	uniform_texture_diffuse = glGetUniformLocation(instancingShader, "Diffuse");

	GLuint offset = 0;


	glGenBuffers(1, &cube_vbo);
	glBindBuffer(GL_ARRAY_BUFFER, cube_vbo);

	instance_positions_ptr = (GLfloat*)new float[NUM_OBJECTS*4];
	instance_quaternion_ptr = (GLfloat*)new float[NUM_OBJECTS*4];
	instance_colors_ptr = (GLfloat*)new float[NUM_OBJECTS*4];
	instance_scale_ptr = (GLfloat*)new float[NUM_OBJECTS*3];

	

	int index=0;
	for (int i=0;i<NUM_OBJECTS_X;i++)
	{
		for (int j=0;j<NUM_OBJECTS_Y;j++)
		{
			for (int k=0;k<NUM_OBJECTS_Z;k++)
			{
				instance_positions_ptr[index*4]=(i*X_GAP-NUM_OBJECTS_X/2);
				instance_positions_ptr[index*4+1]=(j*Y_GAP-NUM_OBJECTS_Y/2);
				instance_positions_ptr[index*4+2]=(k*Z_GAP-NUM_OBJECTS_Z/2)+(j&1);
				
				instance_positions_ptr[index*4+3]=1;

				int shapeType =0;
				void* userPtr = 0;
				btVector3 aabbMin(
					instance_positions_ptr[index*4],
					instance_positions_ptr[index*4+1],
					instance_positions_ptr[index*4+2]);
				btVector3 aabbMax = aabbMin;
				aabbMin -= btVector3(1.f,1.f,1.f);
				aabbMax += btVector3(1.f,1.f,1.f);

				void* myptr = (void*)index;//0;//&mBoxes[i]
				btBroadphaseProxy* proxy = sBroadphase->createProxy(aabbMin,aabbMax,shapeType,myptr,1,1,0,0);//m_dispatcher);
				proxyArray.push_back(proxy);

				instance_quaternion_ptr[index*4]=0;
				instance_quaternion_ptr[index*4+1]=0;
				instance_quaternion_ptr[index*4+2]=0;
				instance_quaternion_ptr[index*4+3]=1;

				instance_colors_ptr[index*4]=j<NUM_OBJECTS_Y/2? 0.5f : 1.f;
				instance_colors_ptr[index*4+1]=k<NUM_OBJECTS_Y/2? 0.5f : 1.f;
				instance_colors_ptr[index*4+2]=i<NUM_OBJECTS_Y/2? 0.5f : 1.f;
				instance_colors_ptr[index*4+3]=1.f;

				instance_scale_ptr[index*3] = 1;
				instance_scale_ptr[index*3+1] = 1;
				instance_scale_ptr[index*3+2] = 1;


				float mass = 1.f;//j? 1.f : 0.f;

				bool writeToGpu = false;
				if (narrowphaseAndSolver)
					narrowphaseAndSolver->registerRigidBody(gShapeIndex,mass,&instance_positions_ptr[index*4],&instance_quaternion_ptr[index*4],writeToGpu);

				index++;
			}
		}
	}

	float posZero[4] = {0,-NUM_OBJECTS_Y/2-1,0,0};
	float ornZero[4] = {0,0,0,1};

	//register a 'plane'
	if (narrowphaseAndSolver)
			narrowphaseAndSolver->registerRigidBody(-1, 0.f, posZero,ornZero,false);

	

	if (narrowphaseAndSolver)
		narrowphaseAndSolver->writeAllBodiesToGpu();


	int size = sizeof(cube_vertices)  + POSITION_BUFFER_SIZE+ORIENTATION_BUFFER_SIZE+COLOR_BUFFER_SIZE+SCALE_BUFFER_SIZE;
	VBOsize = size;

	char* bla = (char*)malloc(size);
	int szc = sizeof(cube_vertices);
	memcpy(bla,&cube_vertices[0],szc);
	memcpy(bla+sizeof(cube_vertices),instance_positions_ptr,POSITION_BUFFER_SIZE);
	memcpy(bla+sizeof(cube_vertices)+POSITION_BUFFER_SIZE,instance_quaternion_ptr,ORIENTATION_BUFFER_SIZE);
	memcpy(bla+sizeof(cube_vertices)+POSITION_BUFFER_SIZE+ORIENTATION_BUFFER_SIZE,instance_colors_ptr, COLOR_BUFFER_SIZE);
	memcpy(bla+sizeof(cube_vertices)+POSITION_BUFFER_SIZE+ORIENTATION_BUFFER_SIZE+COLOR_BUFFER_SIZE,instance_scale_ptr, SCALE_BUFFER_SIZE);

	glBufferData(GL_ARRAY_BUFFER, size, bla, GL_DYNAMIC_DRAW);//GL_STATIC_DRAW);

	///initialize parts of the buffer
#ifdef _USE_SUB_DATA
	glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(cube_vertices)+ 16384, bla);//cube_vertices);
#endif

	char* dest=  (char*)glMapBuffer( GL_ARRAY_BUFFER,GL_WRITE_ONLY);//GL_WRITE_ONLY
	memcpy(dest,cube_vertices,sizeof(cube_vertices));
	//memcpy(dest+sizeof(cube_vertices),instance_colors,sizeof(instance_colors));
	glUnmapBuffer( GL_ARRAY_BUFFER);



	writeTransforms();

	/*
	glBufferSubData(GL_ARRAY_BUFFER, sizeof(cube_vertices) + sizeof(instance_colors), POSITION_BUFFER_SIZE, instance_positions_ptr);
	glBufferSubData(GL_ARRAY_BUFFER, sizeof(cube_vertices) + sizeof(instance_colors)+POSITION_BUFFER_SIZE,ORIENTATION_BUFFER_SIZE , instance_quaternion_ptr);
	*/

	glGenVertexArrays(1, &cube_vao);
	glBindVertexArray(cube_vao);
	glBindBuffer(GL_ARRAY_BUFFER, cube_vbo);
	glBindVertexArray(0);

	glGenBuffers(1, &index_vbo);
	int indexBufferSize = sizeof(cube_indices);
	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_vbo);

	glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexBufferSize, NULL, GL_STATIC_DRAW);
	glBufferSubData(GL_ELEMENT_ARRAY_BUFFER,0,indexBufferSize,cube_indices);

	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
	glBindBuffer(GL_ARRAY_BUFFER,0);
	glBindVertexArray(0);

}
示例#19
0
//--------------------------------------------------------------------------------------
// Release D3D11 resources created in OnD3D11CreateDevice 
//--------------------------------------------------------------------------------------
void CALLBACK OnD3D11DestroyDevice( void* pUserContext )
{
    g_DialogResourceManager.OnD3D11DestroyDevice();
    g_D3DSettingsDlg.OnD3D11DestroyDevice();
    DXUTGetGlobalResourceCache().OnDestroyDevice();
    SAFE_DELETE( g_pTxtHelper );

    g_Mesh11.Destroy();
                

	SAFE_RELEASE(g_pGeometryShader);
    SAFE_RELEASE( g_pVertexLayout11 );
    SAFE_RELEASE( g_pVertexBuffer );
    SAFE_RELEASE( g_pVertexShader );
    SAFE_RELEASE( g_pPixelShader );
    SAFE_RELEASE( g_pSamLinear );

    SAFE_RELEASE( g_pcbVSPerObject );
    SAFE_RELEASE( g_pcbPSPerObject );
    SAFE_RELEASE( g_pcbPSPerFrame );
	
	SAFE_RELEASE( g_pRasterizerState );
	SAFE_RELEASE( g_pRasterizerStateWF );


	for( int flagIndex =  0; flagIndex < numFlags; ++flagIndex )
	{
		cloths[flagIndex].destroy();
	}

	my_capsule.destroy();

	// Shouldn't need to delete this as it's just a soft body and will be deleted later by the collision object cleanup.
	//for( int flagIndex = 0; flagIndex < m_flags.size(); ++flagIndex )
	//{	
		//delete m_flags[flagIndex];
	//}

	//cleanup in the reverse order of creation/initialization
	if( g_defaultSolver )
		delete g_defaultSolver;
	if( g_cpuSolver )
		delete g_cpuSolver;
	if( g_dx11Solver )
		delete g_dx11Solver;
	if( g_dx11SIMDSolver )
		delete g_dx11SIMDSolver;
	if( g_softBodyOutput )
		delete g_softBodyOutput;
	

	for(int i=0; i< m_collisionShapes.size(); i++)
		delete m_collisionShapes[i];

	//remove the rigidbodies from the dynamics world and delete them
	int i;
	for (i=m_dynamicsWorld->getNumCollisionObjects()-1; i>=0 ;i--)
	{
		btCollisionObject* obj = m_dynamicsWorld->getCollisionObjectArray()[i];
		btRigidBody* body = btRigidBody::upcast(obj);
		if (body && body->getMotionState())
		{
			delete body->getMotionState();
		}
		m_dynamicsWorld->removeCollisionObject( obj );
		delete obj;
	}

	delete m_dynamicsWorld;	
	delete m_solver;	
	delete m_broadphase;	
	delete m_dispatcher;
	delete m_collisionConfiguration;

		
}
示例#20
0
void ImportUrdfSetup::initPhysics()
{

	int upAxis = 2;
	m_guiHelper->setUpAxis(2);

	this->createEmptyDynamicsWorld();
	//m_dynamicsWorld->getSolverInfo().m_numIterations = 100;
    m_guiHelper->createPhysicsDebugDrawer(m_dynamicsWorld);
    m_dynamicsWorld->getDebugDrawer()->setDebugMode(
    btIDebugDraw::DBG_DrawConstraints
    +btIDebugDraw::DBG_DrawContactPoints
    +btIDebugDraw::DBG_DrawAabb
        );//+btIDebugDraw::DBG_DrawConstraintLimits);


	btVector3 gravity(0,0,0);
	gravity[upAxis]=-9.8;

	m_dynamicsWorld->setGravity(gravity);

	

    //now print the tree using the new interface
    URDFImporterInterface* bla=0;
	
    static bool newURDF = true;
	if (newURDF)
	{
		b3Printf("using new URDF\n");
		bla = new  BulletURDFImporter(m_guiHelper);
	}
#ifdef USE_ROS_URDF
 else
	{
		b3Printf("using ROS URDF\n");
		bla = new ROSURDFImporter(m_guiHelper);
	}
  	newURDF = !newURDF;
#endif//USE_ROS_URDF
	URDFImporterInterface& u2b = *bla;
	bool loadOk =  u2b.loadURDF(m_fileName);

#ifdef TEST_MULTIBODY_SERIALIZATION	
	//test to serialize a multibody to disk or shared memory, with base, link and joint names
	btSerializer* s = new btDefaultSerializer;
#endif //TEST_MULTIBODY_SERIALIZATION

	if (loadOk)
	{
		//printTree(u2b,u2b.getRootLinkIndex());

		//u2b.printTree();

		btTransform identityTrans;
		identityTrans.setIdentity();


		{


			btMultiBody* mb = 0;


			//todo: move these internal API called inside the 'ConvertURDF2Bullet' call, hidden from the user
			int rootLinkIndex = u2b.getRootLinkIndex();
			b3Printf("urdf root link index = %d\n",rootLinkIndex);
			MyMultiBodyCreator creation(m_guiHelper);

			ConvertURDF2Bullet(u2b,creation, identityTrans,m_dynamicsWorld,m_useMultiBody,u2b.getPathPrefix());
			mb = creation.getBulletMultiBody();

			if (m_useMultiBody && mb )
			{
				std::string*   name = new std::string(u2b.getLinkName(u2b.getRootLinkIndex()));
				m_nameMemory.push_back(name);
#ifdef TEST_MULTIBODY_SERIALIZATION
				s->registerNameForPointer(name->c_str(),name->c_str());
#endif//TEST_MULTIBODY_SERIALIZATION
				mb->setBaseName(name->c_str());
				//create motors for each btMultiBody joint
				int numLinks = mb->getNumLinks();
				for (int i=0;i<numLinks;i++)
				{
					int mbLinkIndex = i;
					int urdfLinkIndex = creation.m_mb2urdfLink[mbLinkIndex];

					std::string* jointName = new std::string(u2b.getJointName(urdfLinkIndex));
					std::string* linkName = new std::string(u2b.getLinkName(urdfLinkIndex).c_str());
#ifdef TEST_MULTIBODY_SERIALIZATION					
					s->registerNameForPointer(jointName->c_str(),jointName->c_str());
					s->registerNameForPointer(linkName->c_str(),linkName->c_str());
#endif//TEST_MULTIBODY_SERIALIZATION
					m_nameMemory.push_back(jointName);
					m_nameMemory.push_back(linkName);

					mb->getLink(i).m_linkName = linkName->c_str();
					mb->getLink(i).m_jointName = jointName->c_str();
							
					if (mb->getLink(mbLinkIndex).m_jointType==btMultibodyLink::eRevolute
					    ||mb->getLink(mbLinkIndex).m_jointType==btMultibodyLink::ePrismatic
					)
					{
						if (m_data->m_numMotors<MAX_NUM_MOTORS)
						{
							
							char motorName[1024];
							sprintf(motorName,"%s q'", jointName->c_str());
							btScalar* motorVel = &m_data->m_motorTargetVelocities[m_data->m_numMotors];
							*motorVel = 0.f;
							SliderParams slider(motorName,motorVel);
							slider.m_minVal=-4;
							slider.m_maxVal=4;
							m_guiHelper->getParameterInterface()->registerSliderFloatParameter(slider);
							float maxMotorImpulse = 10.1f;
							btMultiBodyJointMotor* motor = new btMultiBodyJointMotor(mb,mbLinkIndex,0,0,maxMotorImpulse);
							//motor->setMaxAppliedImpulse(0);
							m_data->m_jointMotors[m_data->m_numMotors]=motor;
							m_dynamicsWorld->addMultiBodyConstraint(motor);
							m_data->m_numMotors++;
						}
					}

				}
			} else
			{
				if (1)
				{
					//create motors for each generic joint
					int num6Dof = creation.getNum6DofConstraints();
					for (int i=0;i<num6Dof;i++)
					{
						btGeneric6DofSpring2Constraint* c = creation.get6DofConstraint(i);
						if (c->getUserConstraintPtr())
						{
							GenericConstraintUserInfo* jointInfo = (GenericConstraintUserInfo*)c->getUserConstraintPtr();
							if ((jointInfo->m_urdfJointType ==URDFRevoluteJoint) || 
								(jointInfo->m_urdfJointType ==URDFPrismaticJoint) ||
								(jointInfo->m_urdfJointType ==URDFContinuousJoint))
							{
								int urdfLinkIndex = jointInfo->m_urdfIndex;
								std::string jointName = u2b.getJointName(urdfLinkIndex);
								char motorName[1024];
								sprintf(motorName,"%s q'", jointName.c_str());
								btScalar* motorVel = &m_data->m_motorTargetVelocities[m_data->m_numMotors];

								*motorVel = 0.f;
								SliderParams slider(motorName,motorVel);
								slider.m_minVal=-4;
								slider.m_maxVal=4;
								m_guiHelper->getParameterInterface()->registerSliderFloatParameter(slider);
								m_data->m_generic6DofJointMotors[m_data->m_numMotors]=c;
								bool motorOn = true;
								c->enableMotor(jointInfo->m_jointAxisIndex,motorOn);
								c->setMaxMotorForce(jointInfo->m_jointAxisIndex,10000);
								c->setTargetVelocity(jointInfo->m_jointAxisIndex,0);
								
								m_data->m_numMotors++;
							}
						}
					}
				}
				
			}
		}

		//the btMultiBody support is work-in-progress :-)

        for (int i=0;i<m_dynamicsWorld->getNumMultiBodyConstraints();i++)
        {
            m_dynamicsWorld->getMultiBodyConstraint(i)->finalizeMultiDof();
        }



		bool createGround=true;
		if (createGround)
		{
			btVector3 groundHalfExtents(20,20,20);
			groundHalfExtents[upAxis]=1.f;
			btBoxShape* box = new btBoxShape(groundHalfExtents);
			box->initializePolyhedralFeatures();

			m_guiHelper->createCollisionShapeGraphicsObject(box);
			btTransform start; start.setIdentity();
			btVector3 groundOrigin(0,0,0);
			groundOrigin[upAxis]=-2;//.5;
			start.setOrigin(groundOrigin);
			btRigidBody* body =  createRigidBody(0,start,box);
			//m_dynamicsWorld->removeRigidBody(body);
		   // m_dynamicsWorld->addRigidBody(body,2,1);
			btVector3 color(0.5,0.5,0.5);
			m_guiHelper->createRigidBodyGraphicsObject(body,color);
		}

		///this extra stepSimulation call makes sure that all the btMultibody transforms are properly propagates.
		m_dynamicsWorld->stepSimulation(1. / 240., 0);// 1., 10, 1. / 240.);
	}

#ifdef TEST_MULTIBODY_SERIALIZATION
	m_dynamicsWorld->serialize(s);
	b3ResourcePath p;
	char resourcePath[1024];
	if (p.findResourcePath("r2d2_multibody.bullet",resourcePath,1024))
	{
		FILE* f = fopen(resourcePath,"wb");
		fwrite(s->getBufferPointer(),s->getCurrentBufferSize(),1,f);
		fclose(f);
	}
#endif//TEST_MULTIBODY_SERIALIZATION

}
示例#21
0
void initBullet(void)
{


#ifdef USE_GPU_SOLVER
	g_dx11Solver = new btDX11SoftBodySolver( g_pd3dDevice, DXUTGetD3D11DeviceContext() );
	g_solver = g_dx11Solver;
#ifdef USE_GPU_COPY
	g_softBodyOutput = new btSoftBodySolverOutputDXtoDX( g_pd3dDevice, DXUTGetD3D11DeviceContext() );
#else // #ifdef USE_GPU_COPY
	g_softBodyOutput = new btSoftBodySolverOutputDXtoCPU;
#endif // #ifdef USE_GPU_COPY
#else
#ifdef USE_SIMDAWARE_SOLVER
	g_dx11SIMDSolver = new btDX11SIMDAwareSoftBodySolver( g_pd3dDevice, DXUTGetD3D11DeviceContext() );
	g_solver = g_dx11SIMDSolver;
	g_softBodyOutput = new btSoftBodySolverOutputDXtoCPU;
#ifdef USE_GPU_COPY
	g_softBodyOutput = new btSoftBodySolverOutputDXtoDX( g_pd3dDevice, DXUTGetD3D11DeviceContext() );
#else // #ifdef USE_GPU_COPY
	g_softBodyOutput = new btSoftBodySolverOutputDXtoCPU;
#endif // #ifdef USE_GPU_COPY
#else
	g_cpuSolver = new btCPUSoftBodySolver;
	g_solver = g_cpuSolver;
	g_softBodyOutput = new btSoftBodySolverOutputCPUtoCPU;
	//g_defaultSolver = new btDefaultSoftBodySolver;
	//g_solver = g_defaultSolver;
#endif
#endif

	if (g_dx11SIMDSolver)
		g_dx11SIMDSolver->setEnableUpdateBounds(true);

	if (g_dx11Solver)
		g_dx11Solver->setEnableUpdateBounds(true);

	// Initialise CPU physics device
	//m_collisionConfiguration = new btDefaultCollisionConfiguration();
	m_collisionConfiguration = new btSoftBodyRigidBodyCollisionConfiguration();
	m_dispatcher = new	btCollisionDispatcher(m_collisionConfiguration);
	m_broadphase = new btDbvtBroadphase();
	btSequentialImpulseConstraintSolver* sol = new btSequentialImpulseConstraintSolver;
	m_solver = sol;

	m_dynamicsWorld = new btSoftRigidDynamicsWorld(m_dispatcher, m_broadphase, m_solver, m_collisionConfiguration, g_solver);	

	m_dynamicsWorld->setGravity(btVector3(0,-10,0));	
	btCollisionShape* groundShape = new btBoxShape(btVector3(btScalar(50.),btScalar(50.),btScalar(50.)));	
	m_collisionShapes.push_back(groundShape);
	btTransform groundTransform;
	groundTransform.setIdentity();
	groundTransform.setOrigin(btVector3(0,-50,0));

	m_dynamicsWorld->getWorldInfo().air_density			=	(btScalar)1.2;
	m_dynamicsWorld->getWorldInfo().water_density		=	0;
	m_dynamicsWorld->getWorldInfo().water_offset		=	0;
	m_dynamicsWorld->getWorldInfo().water_normal		=	btVector3(0,0,0);
	m_dynamicsWorld->getWorldInfo().m_gravity.setValue(0,-10,0);
	
#if 0
	{
		btScalar mass(0.);

		//rigidbody is dynamic if and only if mass is non zero, otherwise static
		bool isDynamic = (mass != 0.f);

		btVector3 localInertia(0,0,0);
		if (isDynamic)
			groundShape->calculateLocalInertia(mass,localInertia);

		//using motionstate is recommended, it provides interpolation capabilities, and only synchronizes 'active' objects
		btDefaultMotionState* myMotionState = new btDefaultMotionState(groundTransform);
		btRigidBody::btRigidBodyConstructionInfo rbInfo(mass,myMotionState,groundShape,localInertia);
		btRigidBody* body = new btRigidBody(rbInfo);

		//add the body to the dynamics world
		m_dynamicsWorld->addRigidBody(body);
	}
 
#endif
#if 0
	{		
		btScalar mass(0.);

		//btScalar mass(1.);

		//rigidbody is dynamic if and only if mass is non zero, otherwise static
		bool isDynamic = (mass != 0.f);
		
		btCollisionShape *capsuleShape = new btCapsuleShape(5, 10);
		capsuleShape->setMargin( 0.5 );
		
		

		my_capsule.set_collision_shape(capsuleShape);

		btVector3 localInertia(0,0,0);
		if (isDynamic)
			capsuleShape->calculateLocalInertia(mass,localInertia);

		m_collisionShapes.push_back(capsuleShape);
		btTransform capsuleTransform;
		capsuleTransform.setIdentity();
#ifdef TABLETEST
		capsuleTransform.setOrigin(btVector3(0, 10, -11));
		const btScalar pi = 3.141592654;
		capsuleTransform.setRotation(btQuaternion(0, 0, pi/2));
#else
		capsuleTransform.setOrigin(btVector3(0, 20, -10));
		
		const btScalar pi = 3.141592654;
		//capsuleTransform.setRotation(btQuaternion(0, 0, pi/2));
		capsuleTransform.setRotation(btQuaternion(0, 0, 0));
#endif
		btDefaultMotionState* myMotionState = new btDefaultMotionState(capsuleTransform);
		btRigidBody::btRigidBodyConstructionInfo rbInfo(mass,myMotionState,capsuleShape,localInertia);
		btRigidBody* body = new btRigidBody(rbInfo);
		body->setFriction( 0.8f );
		my_capsule.set_collision_object(body);

		m_dynamicsWorld->addRigidBody(body);
		//cap_1.collisionShape = body;
		capCollider = body;
	}
#endif


	createFlag( clothWidth, clothHeight, m_flags );

	// Create output buffer descriptions for ecah flag
	// These describe where the simulation should send output data to
	for( int flagIndex = 0; flagIndex < m_flags.size(); ++flagIndex )
	{		
		// In this case we have a DX11 output buffer with a vertex at index 0, 8, 16 and so on as well as a normal at 3, 11, 19 etc.
		// Copies will be performed GPU-side directly into the output buffer
#ifdef USE_GPU_COPY
		btDX11VertexBufferDescriptor *vertexBufferDescriptor = new btDX11VertexBufferDescriptor(DXUTGetD3D11DeviceContext(), cloths[flagIndex].pVB[0], cloths[flagIndex].g_pVB_UAV, 0, 8, 3, 8);
		cloths[flagIndex].m_vertexBufferDescriptor = vertexBufferDescriptor;
#else  // #ifdef USE_GPU_COPY
		btCPUVertexBufferDescriptor *vertexBufferDescriptor = new btCPUVertexBufferDescriptor(cloths[flagIndex].cpu_buffer, 0, 8, 3, 8);
		cloths[flagIndex].m_vertexBufferDescriptor = vertexBufferDescriptor;
#endif // #ifdef USE_GPU_COPY
	}

	g_solver->optimize( m_dynamicsWorld->getSoftBodyArray() );

}
void btOpenCLSoftBodySolverSIMDAware::optimize( btAlignedObjectArray< btSoftBody * > &softBodies ,bool forceUpdate)
{
	if( forceUpdate || m_softBodySet.size() != softBodies.size() )
	{
		// Have a change in the soft body set so update, reloading all the data
		getVertexData().clear();
		getTriangleData().clear();
		getLinkData().clear();
		m_softBodySet.resize(0);
		m_anchorIndex.clear();

		int maxPiterations = 0;
		int maxViterations = 0;

		for( int softBodyIndex = 0; softBodyIndex < softBodies.size(); ++softBodyIndex )
		{
			btSoftBody *softBody = softBodies[ softBodyIndex ];
			using Vectormath::Aos::Matrix3;
			using Vectormath::Aos::Point3;

			// Create SoftBody that will store the information within the solver
			btOpenCLAcceleratedSoftBodyInterface* newSoftBody = new btOpenCLAcceleratedSoftBodyInterface( softBody );
			m_softBodySet.push_back( newSoftBody );

			m_perClothAcceleration.push_back( toVector3(softBody->getWorldInfo()->m_gravity) );
			m_perClothDampingFactor.push_back(softBody->m_cfg.kDP);
			m_perClothVelocityCorrectionCoefficient.push_back( softBody->m_cfg.kVCF );
			m_perClothLiftFactor.push_back( softBody->m_cfg.kLF );
			m_perClothDragFactor.push_back( softBody->m_cfg.kDG );
			m_perClothMediumDensity.push_back(softBody->getWorldInfo()->air_density);
			// Simple init values. Actually we'll put 0 and -1 into them at the appropriate time
			m_perClothFriction.push_back(softBody->m_cfg.kDF);
			m_perClothCollisionObjects.push_back( CollisionObjectIndices(-1, -1) );

			// Add space for new vertices and triangles in the default solver for now
			// TODO: Include space here for tearing too later
			int firstVertex = getVertexData().getNumVertices();
			int numVertices = softBody->m_nodes.size();
			// Round maxVertices to a multiple of the workgroup size so we know we're safe to run over in a given group
			// maxVertices can be increased to allow tearing, but should be used sparingly because these extra verts will always be processed
			int maxVertices = GROUP_SIZE*((numVertices+GROUP_SIZE)/GROUP_SIZE);
			// Allocate space for new vertices in all the vertex arrays
			getVertexData().createVertices( numVertices, softBodyIndex, maxVertices );


			int firstTriangle = getTriangleData().getNumTriangles();
			int numTriangles = softBody->m_faces.size();
			int maxTriangles = numTriangles;
			getTriangleData().createTriangles( maxTriangles );

			// Copy vertices from softbody into the solver
			for( int vertex = 0; vertex < numVertices; ++vertex )
			{
				Point3 multPoint(softBody->m_nodes[vertex].m_x.getX(), softBody->m_nodes[vertex].m_x.getY(), softBody->m_nodes[vertex].m_x.getZ());
				btSoftBodyVertexData::VertexDescription desc;

				// TODO: Position in the softbody might be pre-transformed
				// or we may need to adapt for the pose.
				//desc.setPosition( cloth.getMeshTransform()*multPoint );
				desc.setPosition( multPoint );

				float vertexInverseMass = softBody->m_nodes[vertex].m_im;
				desc.setInverseMass(vertexInverseMass);
				getVertexData().setVertexAt( desc, firstVertex + vertex );

				m_anchorIndex.push_back(-1);
			}
			for( int vertex = numVertices; vertex < maxVertices; ++vertex )
			{
				m_anchorIndex.push_back(-1.0);
			}

			// Copy triangles similarly
			// We're assuming here that vertex indices are based on the firstVertex rather than the entire scene
			for( int triangle = 0; triangle < numTriangles; ++triangle )
			{
				// Note that large array storage is relative to the array not to the cloth
				// So we need to add firstVertex to each value
				int vertexIndex0 = (softBody->m_faces[triangle].m_n[0] - &(softBody->m_nodes[0]));
				int vertexIndex1 = (softBody->m_faces[triangle].m_n[1] - &(softBody->m_nodes[0]));
				int vertexIndex2 = (softBody->m_faces[triangle].m_n[2] - &(softBody->m_nodes[0]));
				btSoftBodyTriangleData::TriangleDescription newTriangle(vertexIndex0 + firstVertex, vertexIndex1 + firstVertex, vertexIndex2 + firstVertex);
				getTriangleData().setTriangleAt( newTriangle, firstTriangle + triangle );
				
				// Increase vertex triangle counts for this triangle		
				getVertexData().getTriangleCount(newTriangle.getVertexSet().vertex0)++;
				getVertexData().getTriangleCount(newTriangle.getVertexSet().vertex1)++;
				getVertexData().getTriangleCount(newTriangle.getVertexSet().vertex2)++;
			}

			int firstLink = getLinkData().getNumLinks();
			int numLinks = softBody->m_links.size();
			int maxLinks = numLinks;
			
			// Allocate space for the links
			getLinkData().createLinks( numLinks );

			// Add the links
			for( int link = 0; link < numLinks; ++link )
			{
				int vertexIndex0 = softBody->m_links[link].m_n[0] - &(softBody->m_nodes[0]);
				int vertexIndex1 = softBody->m_links[link].m_n[1] - &(softBody->m_nodes[0]);

				btSoftBodyLinkData::LinkDescription newLink(vertexIndex0 + firstVertex, vertexIndex1 + firstVertex, softBody->m_links[link].m_material->m_kLST);
				newLink.setLinkStrength(1.f);
				getLinkData().setLinkAt(newLink, firstLink + link);
			}
			
			newSoftBody->setFirstVertex( firstVertex );
			newSoftBody->setFirstTriangle( firstTriangle );
			newSoftBody->setNumVertices( numVertices );
			newSoftBody->setMaxVertices( maxVertices );
			newSoftBody->setNumTriangles( numTriangles );
			newSoftBody->setMaxTriangles( maxTriangles );
			newSoftBody->setFirstLink( firstLink );
			newSoftBody->setNumLinks( numLinks );

			// Find maximum piterations and viterations
			int piterations = softBody->m_cfg.piterations;

            if ( piterations > maxPiterations )
                  maxPiterations = piterations;

            int viterations = softBody->m_cfg.viterations;

			if ( viterations > maxViterations )
                  maxViterations = viterations;

			// zero mass
			for( int vertex = 0; vertex < numVertices; ++vertex )
			{
				if ( softBody->m_nodes[vertex].m_im == 0 )
				{
					AnchorNodeInfoCL nodeInfo;
					nodeInfo.clVertexIndex = firstVertex + vertex;
					nodeInfo.pNode = &softBody->m_nodes[vertex];

					m_anchorNodeInfoArray.push_back(nodeInfo);
				}
			}			

			// anchor position
			if ( numVertices > 0 )
			{
				for ( int anchorIndex = 0; anchorIndex < softBody->m_anchors.size(); anchorIndex++ )
				{
					btSoftBody::Node* anchorNode = softBody->m_anchors[anchorIndex].m_node;
					btSoftBody::Node* firstNode = &softBody->m_nodes[0];

					AnchorNodeInfoCL nodeInfo;
					nodeInfo.clVertexIndex = firstVertex + (int)(anchorNode - firstNode);
					nodeInfo.pNode = anchorNode;

					m_anchorNodeInfoArray.push_back(nodeInfo);
				}
			}			
		}

		m_anchorPosition.clear();		
		m_anchorPosition.resize(m_anchorNodeInfoArray.size());

		for ( int anchorNode = 0; anchorNode < m_anchorNodeInfoArray.size(); anchorNode++ )
		{
			const AnchorNodeInfoCL& anchorNodeInfo = m_anchorNodeInfoArray[anchorNode];
			m_anchorIndex[anchorNodeInfo.clVertexIndex] = anchorNode;
			getVertexData().getInverseMass(anchorNodeInfo.clVertexIndex) = 0.0f;
		}
		
		updateConstants(0.f);

		// set position and velocity iterations
		setNumberOfPositionIterations(maxPiterations);
		setNumberOfVelocityIterations(maxViterations);

		// set wind velocity
		m_perClothWindVelocity.resize( m_softBodySet.size() );
		for( int softBodyIndex = 0; softBodyIndex < m_softBodySet.size(); ++softBodyIndex )
		{
			btSoftBody *softBody = m_softBodySet[softBodyIndex]->getSoftBody();			
			m_perClothWindVelocity[softBodyIndex] = toVector3(softBody->getWindVelocity());
		}

		m_clPerClothWindVelocity.changedOnCPU();

		// generate batches
		m_linkData.generateBatches();		
		m_triangleData.generateBatches();

		// Build the shaders to match the batching parameters
		buildShaders();
	}
}
	virtual	void	processIsland(btCollisionObject** bodies,int numBodies,btPersistentManifold**	manifolds,int numManifolds, int islandId)
	{
		if (islandId<0)
		{
			///we don't split islands, so all constraints/contact manifolds/bodies are passed into the solver regardless the island id
			m_solver->solveMultiBodyGroup( bodies,numBodies,manifolds, numManifolds,m_sortedConstraints, m_numConstraints, &m_multiBodySortedConstraints[0],m_numConstraints,*m_solverInfo,m_debugDrawer,m_dispatcher);
		} else
		{
				//also add all non-contact constraints/joints for this island
			btTypedConstraint** startConstraint = 0;
			btMultiBodyConstraint** startMultiBodyConstraint = 0;

			int numCurConstraints = 0;
			int numCurMultiBodyConstraints = 0;

			int i;
			
			//find the first constraint for this island

			for (i=0;i<m_numConstraints;i++)
			{
				if (btGetConstraintIslandId2(m_sortedConstraints[i]) == islandId)
				{
					startConstraint = &m_sortedConstraints[i];
					break;
				}
			}
			//count the number of constraints in this island
			for (;i<m_numConstraints;i++)
			{
				if (btGetConstraintIslandId2(m_sortedConstraints[i]) == islandId)
				{
					numCurConstraints++;
				}
			}

			for (i=0;i<m_numMultiBodyConstraints;i++)
			{
				if (btGetMultiBodyConstraintIslandId(m_multiBodySortedConstraints[i]) == islandId)
				{
					
					startMultiBodyConstraint = &m_multiBodySortedConstraints[i];
					break;
				}
			}
			//count the number of multi body constraints in this island
			for (;i<m_numMultiBodyConstraints;i++)
			{
				if (btGetMultiBodyConstraintIslandId(m_multiBodySortedConstraints[i]) == islandId)
				{
					numCurMultiBodyConstraints++;
				}
			}

			//if (m_solverInfo->m_minimumSolverBatchSize<=1)
			//{
			//	m_solver->solveGroup( bodies,numBodies,manifolds, numManifolds,startConstraint,numCurConstraints,*m_solverInfo,m_debugDrawer,m_dispatcher);
			//} else
			{
				
				for (i=0;i<numBodies;i++)
					m_bodies.push_back(bodies[i]);
				for (i=0;i<numManifolds;i++)
					m_manifolds.push_back(manifolds[i]);
				for (i=0;i<numCurConstraints;i++)
					m_constraints.push_back(startConstraint[i]);
				
				for (i=0;i<numCurMultiBodyConstraints;i++)
					m_multiBodyConstraints.push_back(startMultiBodyConstraint[i]);
				
				if ((m_constraints.size()+m_manifolds.size())>m_solverInfo->m_minimumSolverBatchSize)
				{
					processConstraints();
				} else
				{
					//printf("deferred\n");
				}
			}
		}
	}
static void generateBatchesOfWavefronts( btAlignedObjectArray < btAlignedObjectArray <int> > &linksForWavefronts, btSoftBodyLinkData &linkData, int numVertices, btAlignedObjectArray < btAlignedObjectArray <int> > &wavefrontBatches )
{
	// A per-batch map of truth values stating whether a given vertex is in that batch
	// This allows us to significantly optimize the batching
	btAlignedObjectArray <btAlignedObjectArray<bool> > mapOfVerticesInBatches;

	for( int waveIndex = 0; waveIndex < linksForWavefronts.size(); ++waveIndex )
	{
		btAlignedObjectArray <int> &wavefront( linksForWavefronts[waveIndex] );

		int batch = 0;
		bool placed = false;
		while( batch < wavefrontBatches.size() && !placed )
		{
			// Test the current batch, see if this wave shares any vertex with the waves in the batch
			bool foundSharedVertex = false;
			for( int link = 0; link < wavefront.size(); ++link )
			{
				btSoftBodyLinkData::LinkNodePair vertices = linkData.getVertexPair( wavefront[link] );
				if( (mapOfVerticesInBatches[batch])[vertices.vertex0] || (mapOfVerticesInBatches[batch])[vertices.vertex1] )
				{
					foundSharedVertex = true;
				}
			}

			if( !foundSharedVertex )
			{
				wavefrontBatches[batch].push_back( waveIndex );	
				// Insert vertices into this batch too
				for( int link = 0; link < wavefront.size(); ++link )
				{
					btSoftBodyLinkData::LinkNodePair vertices = linkData.getVertexPair( wavefront[link] );
					(mapOfVerticesInBatches[batch])[vertices.vertex0] = true;
					(mapOfVerticesInBatches[batch])[vertices.vertex1] = true;
				}
				placed = true;
			}
			batch++;
		}
		if( batch == wavefrontBatches.size() && !placed )
		{
			wavefrontBatches.resize( batch + 1 );
			wavefrontBatches[batch].push_back( waveIndex );

			// And resize map as well
			mapOfVerticesInBatches.resize( batch + 1 );
			
			// Resize maps with total number of vertices
			mapOfVerticesInBatches[batch].resize( numVertices+1, false );

			// Insert vertices into this batch too
			for( int link = 0; link < wavefront.size(); ++link )
			{
				btSoftBodyLinkData::LinkNodePair vertices = linkData.getVertexPair( wavefront[link] );
				(mapOfVerticesInBatches[batch])[vertices.vertex0] = true;
				(mapOfVerticesInBatches[batch])[vertices.vertex1] = true;
			}
		}
	}
	mapOfVerticesInBatches.clear();
}
示例#25
0
PfxInt32 BulletSetupContactConstraints(PfxSetupContactConstraintsParam &param)
{
//	PfxInt32 ret = pfxCheckParamOfSetupContactConstraints(param);
	//if(ret != SCE_PFX_OK) return ret;
	
	SCE_PFX_PUSH_MARKER("pfxSetupContactConstraints");

	PfxConstraintPair *contactPairs = param.contactPairs;
	PfxUInt32 numContactPairs = param.numContactPairs;
	PfxContactManifold *offsetContactManifolds = param.offsetContactManifolds;
	PfxRigidState *offsetRigidStates = param.offsetRigidStates;
	PfxRigidBody *offsetRigidBodies = param.offsetRigidBodies;
	PfxSolverBody *offsetSolverBodies = param.offsetSolverBodies;
	manifolds.resize(0);

	for(PfxUInt32 i=0;i<numContactPairs;i++) {
		PfxConstraintPair &pair = contactPairs[i];

//		if(!sce::PhysicsEffects::pfxCheckSolver(pair)) {
	//		continue;
		//}

		PfxUInt16 iA = pfxGetObjectIdA(pair);
		PfxUInt16 iB = pfxGetObjectIdB(pair);
		PfxUInt32 iConstraint = pfxGetConstraintId(pair);

		PfxContactManifold &contact = offsetContactManifolds[iConstraint];

		btPersistentManifold& manifold = manifolds.expand();
		memset(&manifold,0xff,sizeof(btPersistentManifold));

		manifold.m_body0 = &rbs[iA];
		manifold.m_body1 = &rbs[iB];
		manifold.m_cachedPoints = contact.getNumContacts();

		if (!contact.getNumContacts())
			continue;


		SCE_PFX_ALWAYS_ASSERT(iA==contact.getRigidBodyIdA());
		SCE_PFX_ALWAYS_ASSERT(iB==contact.getRigidBodyIdB());

		PfxRigidState &stateA = offsetRigidStates[iA];
		PfxRigidBody &bodyA = offsetRigidBodies[iA];
		PfxSolverBody &solverBodyA = offsetSolverBodies[iA];

		PfxRigidState &stateB = offsetRigidStates[iB];
		PfxRigidBody &bodyB = offsetRigidBodies[iB];
		PfxSolverBody &solverBodyB = offsetSolverBodies[iB];
	
		contact.setInternalFlag(0);
		
		PfxFloat restitution = 0.5f * (bodyA.getRestitution() + bodyB.getRestitution());
		if(contact.getDuration() > 1) restitution = 0.0f;
		
		PfxFloat friction = sqrtf(bodyA.getFriction() * bodyB.getFriction());
		
		manifold.m_cachedPoints = contact.getNumContacts();
	

		manifold.m_contactProcessingThreshold = 0.01f;//SCE_PFX_CONTACT_THRESHOLD_NORMAL;
		manifold.m_contactBreakingThreshold = 0.01f;

		for(int j=0;j<contact.getNumContacts();j++) {
			PfxContactPoint &cp = contact.getContactPoint(j);

			PfxVector3 ptA = pfxReadVector3(cp.m_localPointA);
			manifold.m_pointCache[j].m_localPointA.setValue(ptA.getX(),ptA.getY(),ptA.getZ());
			PfxVector3 ptB = pfxReadVector3(cp.m_localPointB);
			manifold.m_pointCache[j].m_localPointB.setValue(ptB.getX(),ptB.getY(),ptB.getZ());
			
			manifold.m_pointCache[j].m_normalWorldOnB.setValue(
						cp.m_constraintRow[0].m_normal[0],
						cp.m_constraintRow[0].m_normal[1],
						cp.m_constraintRow[0].m_normal[2]);
			manifold.m_pointCache[j].m_distance1 = cp.m_distance1;
			manifold.m_pointCache[j].m_combinedFriction = friction;
			manifold.m_pointCache[j].m_combinedRestitution = restitution;
			manifold.m_pointCache[j].m_appliedImpulse = cp.m_constraintRow[0].m_accumImpulse;
			manifold.m_pointCache[j].m_lateralFrictionDir1.setValue(
						cp.m_constraintRow[1].m_normal[0],
						cp.m_constraintRow[1].m_normal[1],
						cp.m_constraintRow[1].m_normal[2]);
			manifold.m_pointCache[j].m_appliedImpulseLateral1 = cp.m_constraintRow[1].m_accumImpulse;

			manifold.m_pointCache[j].m_lateralFrictionDir2.setValue(
						cp.m_constraintRow[2].m_normal[0],
						cp.m_constraintRow[2].m_normal[1],
						cp.m_constraintRow[2].m_normal[2]);
			manifold.m_pointCache[j].m_appliedImpulseLateral2 = cp.m_constraintRow[2].m_accumImpulse;
			manifold.m_pointCache[j].m_lateralFrictionInitialized = true;
			manifold.m_pointCache[j].m_lifeTime = cp.m_duration;

			btTransform trA = manifold.m_body0->getWorldTransform();
			btTransform trB = manifold.m_body1->getWorldTransform();

			manifold.m_pointCache[j].m_positionWorldOnA = trA( manifold.m_pointCache[j].m_localPointA );
			manifold.m_pointCache[j].m_positionWorldOnB = trB( manifold.m_pointCache[j].m_localPointB );




						//btVector3 m_localPointA;			
			//btVector3 m_localPointB;			
			//btVector3	m_positionWorldOnB;
			//m_positionWorldOnA is redundant information, see getPositionWorldOnA(), but for clarity
			//btVector3	m_positionWorldOnA;




			/*
			pfxSetupContactConstraint(
				cp.m_constraintRow[0],
				cp.m_constraintRow[1],
				cp.m_constraintRow[2],
				cp.m_distance,
				restitution,
				friction,
				pfxReadVector3(cp.m_constraintRow[0].m_normal),
				pfxReadVector3(cp.m_localPointA),
				pfxReadVector3(cp.m_localPointB),
				stateA,
				stateB,
				solverBodyA,
				solverBodyB,
				param.separateBias,
				param.timeStep
				);
				*/

		}

		contact.setCompositeFriction(friction);
	}

	SCE_PFX_POP_MARKER();

	return SCE_PFX_OK;
}
static void computeBatchingIntoWavefronts( 
	btSoftBodyLinkData &linkData, 
	int wavefrontSize, 
	int linksPerWorkItem, 
	int maxLinksPerWavefront, 
	btAlignedObjectArray < btAlignedObjectArray <int> > &linksForWavefronts, 
	btAlignedObjectArray< btAlignedObjectArray < btAlignedObjectArray <int> > > &batchesWithinWaves, /* wave, batch, links in batch */
	btAlignedObjectArray< btAlignedObjectArray< int > > &verticesForWavefronts /* wavefront, vertex */
	)
{
	

	// Attempt generation of larger batches of links.
	btAlignedObjectArray< bool > processedLink;
	processedLink.resize( linkData.getNumLinks() );
	btAlignedObjectArray< int > listOfLinksPerVertex;
	int maxLinksPerVertex = 0;

	// Count num vertices
	int numVertices = 0;
	for( int linkIndex = 0; linkIndex < linkData.getNumLinks(); ++linkIndex )
	{
		btSoftBodyLinkData::LinkNodePair nodes( linkData.getVertexPair(linkIndex) );
		numVertices = btMax( numVertices, nodes.vertex0 + 1 );
		numVertices = btMax( numVertices, nodes.vertex1 + 1 );
	}

	// Need list of links per vertex
	// Compute valence of each vertex
	btAlignedObjectArray <int> numLinksPerVertex;
	numLinksPerVertex.resize(0);
	numLinksPerVertex.resize( numVertices, 0 );

	generateLinksPerVertex( numVertices, linkData, listOfLinksPerVertex, numLinksPerVertex, maxLinksPerVertex );

	if (!numVertices)
		return;

	for( int vertex = 0; vertex < 10; ++vertex )
	{
		for( int link = 0; link < numLinksPerVertex[vertex]; ++link )
		{
			int linkAddress = vertex * maxLinksPerVertex + link;
		}
	}


	// At this point we know what links we have for each vertex so we can start batching
	
	// We want a vertex to start with, let's go with 0
	int currentVertex = 0;
	int linksProcessed = 0;

	btAlignedObjectArray <int> verticesToProcess;

	while( linksProcessed < linkData.getNumLinks() )
	{
		// Next wavefront
		int nextWavefront = linksForWavefronts.size();
		linksForWavefronts.resize( nextWavefront + 1 );
		btAlignedObjectArray <int> &linksForWavefront(linksForWavefronts[nextWavefront]);
		verticesForWavefronts.resize( nextWavefront + 1 );
		btAlignedObjectArray<int> &vertexSet( verticesForWavefronts[nextWavefront] );

		linksForWavefront.resize(0);

		// Loop to find enough links to fill the wavefront
		// Stopping if we either run out of links, or fill it
		while( linksProcessed < linkData.getNumLinks() && linksForWavefront.size() < maxLinksPerWavefront )
		{
			// Go through the links for the current vertex
			for( int link = 0; link < numLinksPerVertex[currentVertex] && linksForWavefront.size() < maxLinksPerWavefront; ++link )
			{
				int linkAddress = currentVertex * maxLinksPerVertex + link;
				int linkIndex = listOfLinksPerVertex[linkAddress];
				
				// If we have not already processed this link, add it to the wavefront
				// Claim it as another processed link
				// Add the vertex at the far end to the list of vertices to process.
				if( !processedLink[linkIndex] )
				{
					linksForWavefront.push_back( linkIndex );
					linksProcessed++;
					processedLink[linkIndex] = true;
					int v0 = linkData.getVertexPair(linkIndex).vertex0;
					int v1 = linkData.getVertexPair(linkIndex).vertex1;
					if( v0 == currentVertex )
						verticesToProcess.push_back( v1 );
					else
						verticesToProcess.push_back( v0 );
				}
			}
			if( verticesToProcess.size() > 0 )
			{
				// Get the element on the front of the queue and remove it
				currentVertex = verticesToProcess[0];
				removeFromVector( verticesToProcess, 0 );
			} else {		
				// If we've not yet processed all the links, find the first unprocessed one
				// and select one of its vertices as the current vertex
				if( linksProcessed < linkData.getNumLinks() )
				{
					int searchLink = 0;
					while( processedLink[searchLink] )
						searchLink++;
					currentVertex = linkData.getVertexPair(searchLink).vertex0;
				}	
			}
		}

		// We have either finished or filled a wavefront
		for( int link = 0; link < linksForWavefront.size(); ++link )
		{
			int v0 = linkData.getVertexPair( linksForWavefront[link] ).vertex0;
			int v1 = linkData.getVertexPair( linksForWavefront[link] ).vertex1;
			insertUniqueAndOrderedIntoVector( vertexSet, v0 );
			insertUniqueAndOrderedIntoVector( vertexSet, v1 );
		}
		// Iterate over links mapped to the wave and batch those
		// We can run a batch on each cycle trivially
		
		batchesWithinWaves.resize( batchesWithinWaves.size() + 1 );
		btAlignedObjectArray < btAlignedObjectArray <int> > &batchesWithinWave( batchesWithinWaves[batchesWithinWaves.size()-1] );
		

		for( int link = 0; link < linksForWavefront.size(); ++link )
		{
			int linkIndex = linksForWavefront[link];
			btSoftBodyLinkData::LinkNodePair vertices = linkData.getVertexPair( linkIndex );
			
			int batch = 0;
			bool placed = false;
			while( batch < batchesWithinWave.size() && !placed )
			{
				bool foundSharedVertex = false;
				if( batchesWithinWave[batch].size() >= wavefrontSize )
				{
					// If we have already filled this batch, move on to another
					foundSharedVertex = true;
				} else {
					for( int link2 = 0; link2 < batchesWithinWave[batch].size(); ++link2 )
					{
						btSoftBodyLinkData::LinkNodePair vertices2 = linkData.getVertexPair( (batchesWithinWave[batch])[link2] );

						if( vertices.vertex0 == vertices2.vertex0 ||
							vertices.vertex1 == vertices2.vertex0 ||
							vertices.vertex0 == vertices2.vertex1 ||
							vertices.vertex1 == vertices2.vertex1 )
						{
							foundSharedVertex = true;
							break;
						}
					}
				}
				if( !foundSharedVertex )
				{
					batchesWithinWave[batch].push_back( linkIndex );
					placed = true;
				} else {
					++batch;
				}
			}
			if( batch == batchesWithinWave.size() && !placed )
			{
				batchesWithinWave.resize( batch + 1 );
				batchesWithinWave[batch].push_back( linkIndex );
			}
		}
		
	}

}
void readLibraryGeometries(TiXmlDocument& doc, btAlignedObjectArray<GLInstanceGraphicsShape>& visualShapes, btHashMap<btHashString,int>& name2Shape, float extraScaling) 
{
	btHashMap<btHashString,TiXmlElement* > allSources;
	btHashMap<btHashString,VertexSource> vertexSources;
	for(TiXmlElement* geometry = doc.RootElement()->FirstChildElement("library_geometries")->FirstChildElement("geometry");
			geometry != NULL; geometry = geometry->NextSiblingElement("geometry")) 
	{
		btAlignedObjectArray<btVector3> vertexPositions;
		btAlignedObjectArray<btVector3> vertexNormals;
		btAlignedObjectArray<int> indices;

		const char* geometryName = geometry->Attribute("id");
		for (TiXmlElement* mesh = geometry->FirstChildElement("mesh");(mesh != NULL); mesh = mesh->NextSiblingElement("mesh")) 
		{
			TiXmlElement* vertices2 = mesh->FirstChildElement("vertices");
			
			for (TiXmlElement* source = mesh->FirstChildElement("source");source != NULL;source = source->NextSiblingElement("source")) 
			{
				const char* srcId= source->Attribute("id");
//				printf("source id=%s\n",srcId);
				allSources.insert(srcId,source);
			}
			const char* vertexId = vertices2->Attribute("id");
			//printf("vertices id=%s\n",vertexId);
			VertexSource vs;
			for(TiXmlElement* input = vertices2->FirstChildElement("input");input != NULL;input = input->NextSiblingElement("input")) 
			{
				const char* sem = input->Attribute("semantic");
				std::string semName(sem);
//					printf("sem=%s\n",sem);
		//		const char* src = input->Attribute("source");
//					printf("src=%s\n",src);
				const char* srcIdRef = input->Attribute("source");
				std::string source_name;
				source_name = std::string(srcIdRef);
				source_name = source_name.erase(0, 1);
				if (semName=="POSITION")
				{
					vs.m_positionArrayId = source_name;
				}
				if (semName=="NORMAL")
				{
					vs.m_normalArrayId = source_name;
				}
			}
			vertexSources.insert(vertexId,vs);

			for (TiXmlElement* primitive = mesh->FirstChildElement("triangles"); primitive; primitive = primitive->NextSiblingElement("triangles"))
			{
				std::string positionSourceName;
				std::string normalSourceName;
				int primitiveCount;
				primitive->QueryIntAttribute("count", &primitiveCount);
				int indexStride=1;
				int posOffset = 0;
				int normalOffset = 0;
				int numIndices = 0;
				{

					for (TiXmlElement* input = primitive->FirstChildElement("input");input != NULL;input = input->NextSiblingElement("input")) 
					{
						const char* sem = input->Attribute("semantic");
						std::string semName(sem);
						int offset = atoi(input->Attribute("offset"));
						if ((offset+1)>indexStride)
							indexStride=offset+1;
						//printf("sem=%s\n",sem);
					//	const char* src = input->Attribute("source");

						//printf("src=%s\n",src);
						const char* srcIdRef = input->Attribute("source");
						std::string source_name;
						source_name = std::string(srcIdRef);
						source_name = source_name.erase(0, 1);
							
						if (semName=="VERTEX")
						{
							//now we have POSITION and possibly NORMAL too, using same index array (<p>)
							VertexSource* vs = vertexSources[source_name.c_str()];
							if (vs->m_positionArrayId.length())
							{
								positionSourceName = vs->m_positionArrayId;
								posOffset = offset;
							}
							if (vs->m_normalArrayId.length())
							{
								normalSourceName = vs->m_normalArrayId;
								normalOffset  = offset;
							}
						}
						if (semName=="NORMAL")
						{
							btAssert(normalSourceName.length()==0);
							normalSourceName = source_name;
							normalOffset  = offset;
						}
					}
					numIndices = primitiveCount * 3; 
				}
				btAlignedObjectArray<float> positionFloatArray;
				int posStride=1;
				TiXmlElement** sourcePtr = allSources[positionSourceName.c_str()];
				if (sourcePtr)
				{
					readFloatArray(*sourcePtr,positionFloatArray, posStride);
				}
				btAlignedObjectArray<float> normalFloatArray;
				int normalStride=1;
				sourcePtr = allSources[normalSourceName.c_str()];
				if (sourcePtr)
				{
					readFloatArray(*sourcePtr,normalFloatArray,normalStride);
				}
				btAlignedObjectArray<int> curIndices;
				curIndices.reserve(numIndices*indexStride);
				TokenIntArray adder(curIndices);
				tokenize(primitive->FirstChildElement("p")->GetText(),adder);
				assert(curIndices.size() == numIndices*indexStride);
				int indexOffset = vertexPositions.size();

				for(int index=0; index<numIndices; index++) 
				{
					int posIndex = curIndices[index*indexStride+posOffset];
					int normalIndex = curIndices[index*indexStride+normalOffset];
					vertexPositions.push_back(btVector3(extraScaling*positionFloatArray[posIndex*3+0],
						extraScaling*positionFloatArray[posIndex*3+1],
						extraScaling*positionFloatArray[posIndex*3+2]));
							
					if (normalFloatArray.size() && (normalFloatArray.size()>normalIndex))
					{
						vertexNormals.push_back(btVector3(normalFloatArray[normalIndex*3+0],
															normalFloatArray[normalIndex*3+1],
															normalFloatArray[normalIndex*3+2]));
					} else
					{
						//add a dummy normal of length zero, so it is easy to detect that it is an invalid normal
						vertexNormals.push_back(btVector3(0,0,0));
					}
				}
				int curNumIndices = indices.size();
				indices.resize(curNumIndices+numIndices);
				for(int index=0; index<numIndices; index++) 
				{
					indices[curNumIndices+index] = index+indexOffset;
				}
			}//if(primitive != NULL) 
		}//for each mesh
		
		int shapeIndex = visualShapes.size();
        if (shapeIndex<MAX_VISUAL_SHAPES)
        {
            GLInstanceGraphicsShape& visualShape = visualShapes.expand();
            {
                visualShape.m_vertices = new b3AlignedObjectArray<GLInstanceVertex>;
                visualShape.m_indices = new b3AlignedObjectArray<int>;
                int indexBase = 0;

                btAssert(vertexNormals.size()==vertexPositions.size());
                for (int v=0;v<vertexPositions.size();v++)
                {
                    GLInstanceVertex vtx;
                    vtx.xyzw[0] = vertexPositions[v].x();
                    vtx.xyzw[1] = vertexPositions[v].y();
                    vtx.xyzw[2] = vertexPositions[v].z();
                    vtx.xyzw[3] = 1.f;
                    vtx.normal[0] = vertexNormals[v].x();
                    vtx.normal[1] = vertexNormals[v].y();
                    vtx.normal[2] = vertexNormals[v].z();
                    vtx.uv[0] = 0.5f;
                    vtx.uv[1] = 0.5f;
                    visualShape.m_vertices->push_back(vtx);
                }

                for (int index=0;index<indices.size();index++)
                {
                    visualShape.m_indices->push_back(indices[index]+indexBase);
                }
                
                
                //b3Printf(" index_count =%dand vertexPositions.size=%d\n",indices.size(), vertexPositions.size());
                indexBase=visualShape.m_vertices->size();
                visualShape.m_numIndices = visualShape.m_indices->size();
                visualShape.m_numvertices = visualShape.m_vertices->size();
            }
            //b3Printf("geometry name=%s\n",geometryName);
            name2Shape.insert(geometryName,shapeIndex);
        } else
        {
            b3Warning("DAE exceeds number of visual shapes (%d/%d)",shapeIndex, MAX_VISUAL_SHAPES);
        }

	}//for each geometry
}
示例#28
0
bool	btConvexUtility::initializePolyhedralFeatures(const btAlignedObjectArray<btVector3>& orgVertices, bool mergeCoplanarTriangles)
{
	

	btConvexHullComputer conv;
	conv.compute(&orgVertices[0].getX(), sizeof(btVector3),orgVertices.size(),0.f,0.f);

	btAlignedObjectArray<btVector3> faceNormals;
	int numFaces = conv.faces.size();
	faceNormals.resize(numFaces);
	btConvexHullComputer* convexUtil = &conv;

	
	btAlignedObjectArray<btFace>	tmpFaces;
	tmpFaces.resize(numFaces);

	int numVertices = convexUtil->vertices.size();
	m_vertices.resize(numVertices);
	for (int p=0;p<numVertices;p++)
	{
		m_vertices[p] = convexUtil->vertices[p];
	}


	for (int i=0;i<numFaces;i++)
	{
		int face = convexUtil->faces[i];
		//printf("face=%d\n",face);
		const btConvexHullComputer::Edge*  firstEdge = &convexUtil->edges[face];
		const btConvexHullComputer::Edge*  edge = firstEdge;

		btVector3 edges[3];
		int numEdges = 0;
		//compute face normals

		btScalar maxCross2 = 0.f;
		int chosenEdge = -1;

		do
		{
			
			int src = edge->getSourceVertex();
			tmpFaces[i].m_indices.push_back(src);
			int targ = edge->getTargetVertex();
			btVector3 wa = convexUtil->vertices[src];

			btVector3 wb = convexUtil->vertices[targ];
			btVector3 newEdge = wb-wa;
			newEdge.normalize();
			if (numEdges<2)
				edges[numEdges++] = newEdge;

			edge = edge->getNextEdgeOfFace();
		} while (edge!=firstEdge);

		btScalar planeEq = 1e30f;

		
		if (numEdges==2)
		{
			faceNormals[i] = edges[0].cross(edges[1]);
			faceNormals[i].normalize();
			tmpFaces[i].m_plane[0] = faceNormals[i].getX();
			tmpFaces[i].m_plane[1] = faceNormals[i].getY();
			tmpFaces[i].m_plane[2] = faceNormals[i].getZ();
			tmpFaces[i].m_plane[3] = planeEq;

		}
		else
		{
			btAssert(0);//degenerate?
			faceNormals[i].setZero();
		}

		for (int v=0;v<tmpFaces[i].m_indices.size();v++)
		{
			btScalar eq = m_vertices[tmpFaces[i].m_indices[v]].dot(faceNormals[i]);
			if (planeEq>eq)
			{
				planeEq=eq;
			}
		}
		tmpFaces[i].m_plane[3] = -planeEq;
	}

	//merge coplanar faces

	btScalar faceWeldThreshold= 0.999f;
	btAlignedObjectArray<int> todoFaces;
	for (int i=0;i<tmpFaces.size();i++)
		todoFaces.push_back(i);

	while (todoFaces.size())
	{
		btAlignedObjectArray<int> coplanarFaceGroup;
		int refFace = todoFaces[todoFaces.size()-1];

		coplanarFaceGroup.push_back(refFace);
		btFace& faceA = tmpFaces[refFace];
		todoFaces.pop_back();

		btVector3 faceNormalA(faceA.m_plane[0],faceA.m_plane[1],faceA.m_plane[2]);
		for (int j=todoFaces.size()-1;j>=0;j--)
		{
			int i = todoFaces[j];
			btFace& faceB = tmpFaces[i];
			btVector3 faceNormalB(faceB.m_plane[0],faceB.m_plane[1],faceB.m_plane[2]);
			if (faceNormalA.dot(faceNormalB)>faceWeldThreshold)
			{
				coplanarFaceGroup.push_back(i);
				todoFaces.remove(i);
			}
		}


		bool did_merge = false;
		if (mergeCoplanarTriangles && coplanarFaceGroup.size()>1)
		{
			//do the merge: use Graham Scan 2d convex hull

			btAlignedObjectArray<GrahamVector2> orgpoints;

			for (int i=0;i<coplanarFaceGroup.size();i++)
			{

				btFace& face = tmpFaces[coplanarFaceGroup[i]];
				btVector3 faceNormal(face.m_plane[0],face.m_plane[1],face.m_plane[2]);
				btVector3 xyPlaneNormal(0,0,1);

				btQuaternion rotationArc = shortestArcQuat(faceNormal,xyPlaneNormal);
				
				for (int f=0;f<face.m_indices.size();f++)
				{
					int orgIndex = face.m_indices[f];
					btVector3 pt = m_vertices[orgIndex];
					btVector3 rotatedPt =  quatRotate(rotationArc,pt);
					rotatedPt.setZ(0);
					bool found = false;

					for (int i=0;i<orgpoints.size();i++)
					{
						//if ((orgpoints[i].m_orgIndex == orgIndex) || ((rotatedPt-orgpoints[i]).length2()<0.0001))
						if (orgpoints[i].m_orgIndex == orgIndex)
						{
							found=true;
							break;
						}
					}
					if (!found)
						orgpoints.push_back(GrahamVector2(rotatedPt,orgIndex));
				}
			}

			btFace combinedFace;
			for (int i=0;i<4;i++)
				combinedFace.m_plane[i] = tmpFaces[coplanarFaceGroup[0]].m_plane[i];

			btAlignedObjectArray<GrahamVector2> hull;
			GrahamScanConvexHull2D(orgpoints,hull);

			for (int i=0;i<hull.size();i++)
			{
				combinedFace.m_indices.push_back(hull[i].m_orgIndex);
				for(int k = 0; k < orgpoints.size(); k++) {
					if(orgpoints[k].m_orgIndex == hull[i].m_orgIndex) {
						orgpoints[k].m_orgIndex = -1; // invalidate...
						break;
			}
				}
			}
			// are there rejected vertices?
			bool reject_merge = false;
			for(int i = 0; i < orgpoints.size(); i++) {
				if(orgpoints[i].m_orgIndex == -1)
					continue; // this is in the hull...
				// this vertex is rejected -- is anybody else using this vertex?
				for(int j = 0; j < tmpFaces.size(); j++) {
					btFace& face = tmpFaces[j];
					// is this a face of the current coplanar group?
					bool is_in_current_group = false;
					for(int k = 0; k < coplanarFaceGroup.size(); k++) {
						if(coplanarFaceGroup[k] == j) {
							is_in_current_group = true;
							break;
						}
					}
					if(is_in_current_group) // ignore this face...
						continue;
					// does this face use this rejected vertex?
					for(int v = 0; v < face.m_indices.size(); v++) {
						if(face.m_indices[v] == orgpoints[i].m_orgIndex) {
							// this rejected vertex is used in another face -- reject merge
							reject_merge = true;
							break;
						}
					}
					if(reject_merge)
						break;
				}
				if(reject_merge)
					break;
			}
			if(!reject_merge) {
				// do this merge!
				did_merge = true;
			m_faces.push_back(combinedFace);
			}
		}
		if(!did_merge)
		{
			for (int i=0;i<coplanarFaceGroup.size();i++)
			{
				m_faces.push_back(tmpFaces[coplanarFaceGroup[i]]);
			}
		}

	}
	return true;
}
示例#29
0
void ExampleEntries::registerExampleEntry(int menuLevel, const char* name,const char* description, CommonExampleInterface::CreateFunc* createFunc, int option)
{
	ExampleEntry e( menuLevel,name,description, createFunc, option);
	gAdditionalRegisteredExamples.push_back(e);
}
示例#30
0
void TestJointTorqueSetup::initPhysics()
{
    int upAxis = 1;
	gJointFeedbackInWorldSpace = true;
	gJointFeedbackInJointFrame = true;

	m_guiHelper->setUpAxis(upAxis);

    btVector4 colors[4] =
    {
        btVector4(1,0,0,1),
        btVector4(0,1,0,1),
        btVector4(0,1,1,1),
        btVector4(1,1,0,1),
    };
    int curColor = 0;



    

	this->createEmptyDynamicsWorld();
    m_guiHelper->createPhysicsDebugDrawer(m_dynamicsWorld);
    m_dynamicsWorld->getDebugDrawer()->setDebugMode(
        //btIDebugDraw::DBG_DrawConstraints
        +btIDebugDraw::DBG_DrawWireframe
        +btIDebugDraw::DBG_DrawContactPoints
        +btIDebugDraw::DBG_DrawAabb
        );//+btIDebugDraw::DBG_DrawConstraintLimits);

	

    //create a static ground object
    if (1)
        {
            btVector3 groundHalfExtents(1,1,0.2);
            groundHalfExtents[upAxis]=1.f;
            btBoxShape* box = new btBoxShape(groundHalfExtents);
            box->initializePolyhedralFeatures();

            m_guiHelper->createCollisionShapeGraphicsObject(box);
            btTransform start; start.setIdentity();
            btVector3 groundOrigin(-0.4f, 3.f, 0.f);
            groundOrigin[upAxis] -=.5;
			groundOrigin[2]-=0.6;
            start.setOrigin(groundOrigin);
			btQuaternion groundOrn(btVector3(0,1,0),0.25*SIMD_PI);
		
		//	start.setRotation(groundOrn);
            btRigidBody* body =  createRigidBody(0,start,box);
			body->setFriction(0);
            btVector4 color = colors[curColor];
			curColor++;
			curColor&=3;
            m_guiHelper->createRigidBodyGraphicsObject(body,color);
        }

    {
        bool floating = false;
        bool damping = false;
        bool gyro = false;
        int numLinks = 2;
        bool spherical = false;					//set it ot false -to use 1DoF hinges instead of 3DoF sphericals
        bool canSleep = false;
        bool selfCollide = false;
          btVector3 linkHalfExtents(0.05, 0.37, 0.1);
        btVector3 baseHalfExtents(0.05, 0.37, 0.1);

        btVector3 basePosition = btVector3(-0.4f, 3.f, 0.f);
        //mbC->forceMultiDof();							//if !spherical, you can comment this line to check the 1DoF algorithm
        //init the base
        btVector3 baseInertiaDiag(0.f, 0.f, 0.f);
        float baseMass = 1.f;

        if(baseMass)
        {
            //btCollisionShape *shape = new btSphereShape(baseHalfExtents[0]);// btBoxShape(btVector3(baseHalfExtents[0], baseHalfExtents[1], baseHalfExtents[2]));
			btCollisionShape *shape = new btBoxShape(btVector3(baseHalfExtents[0], baseHalfExtents[1], baseHalfExtents[2]));
            shape->calculateLocalInertia(baseMass, baseInertiaDiag);
            delete shape;
        }


        btMultiBody *pMultiBody = new btMultiBody(numLinks, baseMass, baseInertiaDiag, !floating, canSleep);
		
        m_multiBody = pMultiBody;
        btQuaternion baseOriQuat(0.f, 0.f, 0.f, 1.f);
	//	baseOriQuat.setEulerZYX(-.25*SIMD_PI,0,-1.75*SIMD_PI);
        pMultiBody->setBasePos(basePosition);
        pMultiBody->setWorldToBaseRot(baseOriQuat);
        btVector3 vel(0, 0, 0);
    //	pMultiBody->setBaseVel(vel);

        //init the links
        btVector3 hingeJointAxis(1, 0, 0);
        
        //y-axis assumed up
        btVector3 parentComToCurrentCom(0, -linkHalfExtents[1] * 2.f, 0);						//par body's COM to cur body's COM offset
        btVector3 currentPivotToCurrentCom(0, -linkHalfExtents[1], 0);							//cur body's COM to cur body's PIV offset
        btVector3 parentComToCurrentPivot = parentComToCurrentCom - currentPivotToCurrentCom;	//par body's COM to cur body's PIV offset

        //////
        btScalar q0 = 0.f * SIMD_PI/ 180.f;
        btQuaternion quat0(btVector3(0, 1, 0).normalized(), q0);
        quat0.normalize();
        /////

        for(int i = 0; i < numLinks; ++i)
        {
			float linkMass = 1.f;
			//if (i==3 || i==2)
			//	linkMass= 1000;
			btVector3 linkInertiaDiag(0.f, 0.f, 0.f);

			btCollisionShape* shape = 0;
			if (i==0)
			{
				shape = new btBoxShape(btVector3(linkHalfExtents[0], linkHalfExtents[1], linkHalfExtents[2]));//
			} else
			{
				shape = new btSphereShape(radius);
			}
			shape->calculateLocalInertia(linkMass, linkInertiaDiag);
			delete shape;


            if(!spherical)
			{
                //pMultiBody->setupRevolute(i, linkMass, linkInertiaDiag, i - 1, btQuaternion(0.f, 0.f, 0.f, 1.f), hingeJointAxis, parentComToCurrentPivot, currentPivotToCurrentCom, false);
		
				if (i==0)
				{
				pMultiBody->setupRevolute(i, linkMass, linkInertiaDiag, i - 1, 
					btQuaternion(0.f, 0.f, 0.f, 1.f), 
					hingeJointAxis, 
					parentComToCurrentPivot, 
					currentPivotToCurrentCom, false);
				} else
				{
					btVector3 parentComToCurrentCom(0, -radius * 2.f, 0);						//par body's COM to cur body's COM offset
					btVector3 currentPivotToCurrentCom(0, -radius, 0);							//cur body's COM to cur body's PIV offset
					btVector3 parentComToCurrentPivot = parentComToCurrentCom - currentPivotToCurrentCom;	//par body's COM to cur body's PIV offset


					pMultiBody->setupFixed(i, linkMass, linkInertiaDiag, i - 1, 
					btQuaternion(0.f, 0.f, 0.f, 1.f), 
					parentComToCurrentPivot, 
					currentPivotToCurrentCom);
				}
					
				//pMultiBody->setupFixed(i,linkMass,linkInertiaDiag,i-1,btQuaternion(0,0,0,1),parentComToCurrentPivot,currentPivotToCurrentCom,false);
		
			}
            else
			{
                //pMultiBody->setupPlanar(i, linkMass, linkInertiaDiag, i - 1, btQuaternion(0.f, 0.f, 0.f, 1.f)/*quat0*/, btVector3(1, 0, 0), parentComToCurrentPivot*2, false);
                pMultiBody->setupSpherical(i, linkMass, linkInertiaDiag, i - 1, btQuaternion(0.f, 0.f, 0.f, 1.f), parentComToCurrentPivot, currentPivotToCurrentCom, false);
			}
        }

        pMultiBody->finalizeMultiDof();

		//for (int i=pMultiBody->getNumLinks()-1;i>=0;i--)//
			for (int i=0;i<pMultiBody->getNumLinks();i++)
		{
			btMultiBodyJointFeedback* fb = new btMultiBodyJointFeedback();
			pMultiBody->getLink(i).m_jointFeedback = fb;
			m_jointFeedbacks.push_back(fb);
			//break;
		}
        btMultiBodyDynamicsWorld* world = m_dynamicsWorld;

        ///
        world->addMultiBody(pMultiBody);
        btMultiBody* mbC = pMultiBody;
        mbC->setCanSleep(canSleep);
        mbC->setHasSelfCollision(selfCollide);
        mbC->setUseGyroTerm(gyro);
        //
        if(!damping)
        {
            mbC->setLinearDamping(0.f);
            mbC->setAngularDamping(0.f);
        }else
        {	mbC->setLinearDamping(0.1f);
            mbC->setAngularDamping(0.9f);
        }
        //
    	m_dynamicsWorld->setGravity(btVector3(0,0,-10));

        //////////////////////////////////////////////
        if(0)//numLinks > 0)
        {
            btScalar q0 = 45.f * SIMD_PI/ 180.f;
            if(!spherical)
			{
				mbC->setJointPosMultiDof(0, &q0);
			}
            else
            {
                btQuaternion quat0(btVector3(1, 1, 0).normalized(), q0);
                quat0.normalize();
                mbC->setJointPosMultiDof(0, quat0);
            }
        }
        ///

        btAlignedObjectArray<btQuaternion> world_to_local;
        world_to_local.resize(pMultiBody->getNumLinks() + 1);

        btAlignedObjectArray<btVector3> local_origin;
        local_origin.resize(pMultiBody->getNumLinks() + 1);
        world_to_local[0] = pMultiBody->getWorldToBaseRot();
        local_origin[0] = pMultiBody->getBasePos();
      //  double friction = 1;
        {

        //	float pos[4]={local_origin[0].x(),local_origin[0].y(),local_origin[0].z(),1};
//            btScalar quat[4]={-world_to_local[0].x(),-world_to_local[0].y(),-world_to_local[0].z(),world_to_local[0].w()};


            if (1)
            {
                btCollisionShape* shape = new btBoxShape(btVector3(baseHalfExtents[0],baseHalfExtents[1],baseHalfExtents[2]));//new btSphereShape(baseHalfExtents[0]);
                m_guiHelper->createCollisionShapeGraphicsObject(shape);

                btMultiBodyLinkCollider* col= new btMultiBodyLinkCollider(pMultiBody, -1);
                col->setCollisionShape(shape);

                btTransform tr;
                tr.setIdentity();
//if we don't set the initial pose of the btCollisionObject, the simulator will do this 
				//when syncing the btMultiBody link transforms to the btMultiBodyLinkCollider
               
                tr.setOrigin(local_origin[0]);
				btQuaternion orn(btVector3(0,0,1),0.25*3.1415926538);
				
                tr.setRotation(orn);
                col->setWorldTransform(tr);

				bool isDynamic = (baseMass > 0 && floating);
				int collisionFilterGroup = isDynamic? int(btBroadphaseProxy::DefaultFilter) : int(btBroadphaseProxy::StaticFilter);
				int collisionFilterMask = isDynamic? 	int(btBroadphaseProxy::AllFilter) : 	int(btBroadphaseProxy::AllFilter ^ btBroadphaseProxy::StaticFilter);


                world->addCollisionObject(col,collisionFilterGroup,collisionFilterMask);//, 2,1+2);

                btVector3 color(0.0,0.0,0.5);
                m_guiHelper->createCollisionObjectGraphicsObject(col,color);

//                col->setFriction(friction);
                pMultiBody->setBaseCollider(col);

            }
        }


        for (int i=0; i < pMultiBody->getNumLinks(); ++i)
        {
            const int parent = pMultiBody->getParent(i);
            world_to_local[i+1] = pMultiBody->getParentToLocalRot(i) * world_to_local[parent+1];
            local_origin[i+1] = local_origin[parent+1] + (quatRotate(world_to_local[i+1].inverse() , pMultiBody->getRVector(i)));
        }


        for (int i=0; i < pMultiBody->getNumLinks(); ++i)
        {

            btVector3 posr = local_origin[i+1];
        //	float pos[4]={posr.x(),posr.y(),posr.z(),1};

            btScalar quat[4]={-world_to_local[i+1].x(),-world_to_local[i+1].y(),-world_to_local[i+1].z(),world_to_local[i+1].w()};
			btCollisionShape* shape =0;

			if (i==0)
			{
				shape = new btBoxShape(btVector3(linkHalfExtents[0],linkHalfExtents[1],linkHalfExtents[2]));//btSphereShape(linkHalfExtents[0]);
			} else
			{
				
				shape = new btSphereShape(radius);
			}

            m_guiHelper->createCollisionShapeGraphicsObject(shape);
            btMultiBodyLinkCollider* col = new btMultiBodyLinkCollider(pMultiBody, i);

            col->setCollisionShape(shape);
            btTransform tr;
            tr.setIdentity();
            tr.setOrigin(posr);
            tr.setRotation(btQuaternion(quat[0],quat[1],quat[2],quat[3]));
            col->setWorldTransform(tr);
     //       col->setFriction(friction);
			bool isDynamic = 1;//(linkMass > 0);
			int collisionFilterGroup = isDynamic? int(btBroadphaseProxy::DefaultFilter) : int(btBroadphaseProxy::StaticFilter);
			int collisionFilterMask = isDynamic? 	int(btBroadphaseProxy::AllFilter) : 	int(btBroadphaseProxy::AllFilter ^ btBroadphaseProxy::StaticFilter);

			//if (i==0||i>numLinks-2)
			{
				world->addCollisionObject(col,collisionFilterGroup,collisionFilterMask);//,2,1+2);
				   btVector4 color = colors[curColor];
			curColor++;
			curColor&=3;
            m_guiHelper->createCollisionObjectGraphicsObject(col,color);


            pMultiBody->getLink(i).m_collider=col;
			}
         
        }
    }

	btSerializer* s = new btDefaultSerializer;
	m_dynamicsWorld->serialize(s);
	char resourcePath[1024];
	if (b3ResourcePath::findResourcePath("multibody.bullet",resourcePath,1024))
	{
		FILE* f = fopen(resourcePath,"wb");
		fwrite(s->getBufferPointer(),s->getCurrentBufferSize(),1,f);
		fclose(f);
	}
}