void SampleParticles::Raygun::update(float dtime)
{
if(!isEnabled())
return;
PX_ASSERT(mSample && mForceSmokeCapsule && mForceWaterCapsule && mRenderActor);
// access properties from sample
PxScene& scene = mSample->getActiveScene();
PxVec3 position = mSample->getCamera().getPos();
PxTransform cameraPose = mSample->getCamera().getViewMatrix();
PxMat33 cameraBase(cameraPose.q);
PxVec3 cameraForward = -cameraBase[2];
PxVec3 cameraUp = -cameraBase[1];
// perform raycast here and update impact point
PxRaycastHit hit;
mIsImpacting = scene.raycastSingle(cameraPose.p, cameraForward, 500.0f, PxSceneQueryFlags(0xffffffff), hit);
float impactParam = mIsImpacting ? (hit.impact - position).magnitude() : FLT_MAX;
PxTransform rayPose(position + cameraUp * 0.5f, cameraPose.q*PxQuat(PxHalfPi, PxVec3(0,1,0)));
updateRayCapsule(mForceSmokeCapsule, rayPose, 1.0f);
updateRayCapsule(mForceWaterCapsule, rayPose, 0.3f);
mRenderActor->setTransform(rayPose);
// if we had an impact
if (impactParam < FLT_MAX)
{
PxVec3 impactPos = position + cameraForward*impactParam;
// update emitter with new impact point and direction
if(mSmokeEmitter.emitter)
mSmokeEmitter.emitter->setLocalPose(PxTransform(impactPos, directionToQuaternion(-cameraForward)));
if(mDebrisEmitter.emitter)
mDebrisEmitter.emitter->setLocalPose(PxTransform(impactPos, directionToQuaternion(-cameraForward)));
// spawn new RB debris
if(mRbDebrisTimer < 0.0f && impactParam < FLT_MAX)
{
mRbDebrisTimer = RAYGUN_RB_DEBRIS_RATE;
PxVec3 randDir(getSampleRandom().rand(-1.0f, 1.0f),
getSampleRandom().rand(-1.0f, 1.0f),
getSampleRandom().rand(-1.0f, 1.0f));
PxVec3 vel = -7.0f * (cameraForward + RAYGUN_RB_DEBRIS_ANGLE_RANDOMNESS * randDir.getNormalized());
PxVec3 dim(getSampleRandom().rand(0.0f, RAYGUN_RB_DEBRIS_SCALE),
getSampleRandom().rand(0.0f, RAYGUN_RB_DEBRIS_SCALE),
getSampleRandom().rand(0.0f, RAYGUN_RB_DEBRIS_SCALE));
// give spawn position, initial velocity and dimensions, spawn convex
// which will not act in scene queries
PxConvexMesh* convexMesh = generateConvex(mSample->getPhysics(), mSample->getCooking(), RAYGUN_RB_DEBRIS_SCALE);
mSample->runtimeAssert(convexMesh, "Error generating convex for debris.\n");
PxRigidDynamic* debrisActor = PxCreateDynamic(
mSample->getPhysics(),
PxTransform(impactPos - cameraForward * 0.5f),
PxConvexMeshGeometry(convexMesh),
mSample->getDefaultMaterial(), 1.f);
mSample->getActiveScene().addActor(*debrisActor);
PX_ASSERT(debrisActor->getNbShapes() == 1);
PxShape* debrisShape;
debrisActor->getShapes(&debrisShape, 1);
debrisShape->setFlag(PxShapeFlag::eSCENE_QUERY_SHAPE, false);
debrisActor->setLinearVelocity(vel);
debrisActor->setActorFlag(PxActorFlag::eVISUALIZATION, true);
debrisActor->setAngularDamping(0.5f);
// default material is green for debris
RenderMaterial* debriMaterial = mSample->getMaterial(MATERIAL_HEIGHTFIELD);
if(!debriMaterial)
{
debriMaterial = mSample->mRenderMaterials[MATERIAL_GREEN];
}
mSample->createRenderObjectsFromActor(debrisActor, debriMaterial);
mDebrisLifetime[debrisShape] = RAYGUN_RB_DEBRIS_LIFETIME;
}
}
// update debris lifetime, remove if life ends
DebrisLifetimeMap::iterator it = mDebrisLifetime.begin();
while(it != mDebrisLifetime.end())
{
(*it).second -= dtime;
if((*it).second < 0.0f)
{
PxShape* debrisShape = (*it).first;
PX_ASSERT(debrisShape);
// remove convex mesh
PxConvexMeshGeometry geometry;
bool isConvex = debrisShape->getConvexMeshGeometry(geometry);
PX_ASSERT(isConvex);
PX_UNUSED(isConvex);
geometry.convexMesh->release();
// remove render and physics actor
PxRigidActor& actorToRemove = debrisShape->getActor();
mSample->removeActor(&actorToRemove);
actorToRemove.release();
// remove actor from lifetime map
mDebrisLifetime.erase(it);
it = mDebrisLifetime.begin();
continue;
}
++it;
}
}
osg::Node* createNodeForActor( PxRigidActor* actor )
{
if ( !actor ) return NULL;
std::vector<PxShape*> shapes( actor->getNbShapes() );
osg::ref_ptr<osg::MatrixTransform> transform = new osg::MatrixTransform;
transform->setMatrix( toMatrix(PxMat44(actor->getGlobalPose())) );
osg::ref_ptr<osg::Geode> geode = new osg::Geode;
transform->addChild( geode.get() );
PxU32 num = actor->getShapes( &(shapes[0]), actor->getNbShapes() );
for ( PxU32 i=0; i<num; ++i )
{
PxShape* shape = shapes[i];
osg::Matrix localMatrix = toMatrix( PxMat44(actor->getGlobalPose()) );
osg::Vec3 localPos = toVec3( shape->getLocalPose().p );
osg::Quat localQuat(shape->getLocalPose().q.x, shape->getLocalPose().q.y,
shape->getLocalPose().q.z, shape->getLocalPose().q.w);
switch ( shape->getGeometryType() )
{
case PxGeometryType::eSPHERE:
{
PxSphereGeometry sphere;
shape->getSphereGeometry( sphere );
osg::Sphere* sphereShape = new osg::Sphere(localPos, sphere.radius);
geode->addDrawable( new osg::ShapeDrawable(sphereShape) );
}
break;
case PxGeometryType::ePLANE:
// TODO
break;
case PxGeometryType::eCAPSULE:
{
PxCapsuleGeometry capsule;
shape->getCapsuleGeometry( capsule );
osg::Capsule* capsuleShape = new osg::Capsule(
localPos, capsule.radius, capsule.halfHeight * 2.0f);
capsuleShape->setRotation( localQuat );
geode->addDrawable( new osg::ShapeDrawable(capsuleShape) );
}
break;
case PxGeometryType::eBOX:
{
PxBoxGeometry box;
shape->getBoxGeometry( box );
osg::Box* boxShape = new osg::Box(localPos,
box.halfExtents[0] * 2.0f, box.halfExtents[1] * 2.0f, box.halfExtents[2] * 2.0f);
boxShape->setRotation( localQuat );
geode->addDrawable( new osg::ShapeDrawable(boxShape) );
}
break;
case PxGeometryType::eCONVEXMESH:
{
PxConvexMeshGeometry convexMeshGeom;
shape->getConvexMeshGeometry( convexMeshGeom );
// TODO: consider convexMeshGeom.scale
PxConvexMesh* convexMesh = convexMeshGeom.convexMesh;
if ( convexMesh )
{
/*for ( unsigned int i=0; i<convexMesh->getNbPolygons(); ++i )
{
}*/
// TODO
}
}
break;
case PxGeometryType::eTRIANGLEMESH:
{
PxTriangleMeshGeometry triangleMeshGeom;
shape->getTriangleMeshGeometry( triangleMeshGeom );
// TODO: consider triangleMeshGeom.scale
PxTriangleMesh* triangleMesh = triangleMeshGeom.triangleMesh;
if ( triangleMesh )
{
osg::ref_ptr<osg::Vec3Array> va = new osg::Vec3Array( triangleMesh->getNbVertices() );
for ( unsigned int i=0; i<va->size(); ++i )
(*va)[i] = toVec3( *(triangleMesh->getVertices() + i) ) * localMatrix;
osg::ref_ptr<osg::DrawElements> de;
if ( triangleMesh->getTriangleMeshFlags()&PxTriangleMeshFlag::eHAS_16BIT_TRIANGLE_INDICES )
{
osg::DrawElementsUShort* de16 = new osg::DrawElementsUShort(GL_TRIANGLES);
de = de16;
const PxU16* indices = (const PxU16*)triangleMesh->getTriangles();
for ( unsigned int i=0; i<triangleMesh->getNbTriangles(); ++i )
{
de16->push_back( indices[3 * i + 0] );
de16->push_back( indices[3 * i + 1] );
de16->push_back( indices[3 * i + 2] );
}
}
else
{
osg::DrawElementsUInt* de32 = new osg::DrawElementsUInt(GL_TRIANGLES);
de = de32;
const PxU32* indices = (const PxU32*)triangleMesh->getTriangles();
for ( unsigned int i=0; i<triangleMesh->getNbTriangles(); ++i )
{
de32->push_back( indices[3 * i + 0] );
de32->push_back( indices[3 * i + 1] );
de32->push_back( indices[3 * i + 2] );
}
}
geode->addDrawable( createGeometry(va.get(), NULL, NULL, de.get()) );
}
}
break;
case PxGeometryType::eHEIGHTFIELD:
{
PxHeightFieldGeometry hfGeom;
shape->getHeightFieldGeometry( hfGeom );
// TODO: consider hfGeom.*scale
PxHeightField* heightField = hfGeom.heightField;
if ( heightField )
{
// TODO
}
}
break;
}
}
return transform.release();
}
