//-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~
void
PhysicsActor::setActivationState(unsigned _state)
{
m_activationState = _state;
if (m_activationState)
NewtonWorldUnfreezeBody(dynamic_cast<PhysicsZone*>(m_pZone.get())->getZonePtr(), m_pActor);
else
NewtonWorldFreezeBody(dynamic_cast<PhysicsZone*>(m_pZone.get())->getZonePtr(), m_pActor);
}
// create a rope of boxes
void AddRope (NewtonWorld* nWorld)
{
int i;
dFloat mass;
dFloat Ixx;
dFloat Iyy;
dFloat Izz;
NewtonBody* link0;
NewtonBody* link1;
NewtonCustomJoint* joint;
NewtonCollision* collision;
RenderPrimitive* visualObject;
dVector size (2.0f, 0.25f, 0.25f);
// calculate a acurate momenet of inertia
mass = 2.0f;
Ixx = 0.7f * mass * (size.m_y * size.m_y + size.m_z * size.m_z) / 12.0f;
Iyy = 0.7f * mass * (size.m_x * size.m_x + size.m_z * size.m_z) / 12.0f;
Izz = 0.7f * mass * (size.m_x * size.m_x + size.m_y * size.m_y) / 12.0f;
// create 100 tack of 10 boxes each
//dMatrix location (GetIdentityMatrix());
dMatrix location (dgRollMatrix(3.1426f * 0.5f));
location.m_posit.m_y = 11.5f;
location.m_posit.m_z = -5.0f;
// create a collision primitive to be shared by all links
collision = NewtonCreateCapsule (nWorld, size.m_y, size.m_x, NULL);
link0 = NULL;
// create a lon vertical rope with limits
for (i = 0; i < 7; i ++) {
// create the a graphic character (use a visualObject as our body
visualObject = new CapsulePrimitive (location, size.m_y, size.m_x);
//create the rigid body
link1 = NewtonCreateBody (nWorld, collision);
// add some damping to each link
NewtonBodySetLinearDamping (link1, 0.2f);
dVector angularDamp (0.2f, 0.2f, 0.2f);
NewtonBodySetAngularDamping (link1, &angularDamp.m_x);
// Set Material Id for this object
NewtonBodySetMaterialGroupID (link1, woodID);
// save the pointer to the graphic object with the body.
NewtonBodySetUserData (link1, visualObject);
// set a destrutor for this rigid body
NewtonBodySetDestructorCallback (link1, PhysicsBodyDestructor);
// set the tranform call back function
NewtonBodySetTransformCallback (link1, PhysicsSetTransform);
// set the force and torque call back funtion
NewtonBodySetForceAndTorqueCallback (link1,PhysicsApplyGravityForce);
// set the mass matrix
NewtonBodySetMassMatrix (link1, mass, Ixx, Iyy, Izz);
// set the matrix for tboth the rigid nody and the graphic body
NewtonBodySetMatrix (link1, &location[0][0]);
PhysicsSetTransform (link1, &location[0][0]);
dVector pivot (location.m_posit);
pivot.m_y += (size.m_x - size.m_y) * 0.5f;
dFloat coneAngle = 2.0 * 3.1416f / 180.0f;
dFloat twistAngle = 2.0 * 3.1416f / 180.0f;
dVector pin (location.m_front.Scale (-1.0f));
joint = new CustomConeLimitedBallAndSocket(twistAngle, coneAngle, pin, pivot, link1, link0);
link0 = link1;
location.m_posit.m_y -= (size.m_x - size.m_y);
}
// vrete a short horizontal rope with limits
location = GetIdentityMatrix();
location.m_posit.m_y = 2.5f;
location.m_posit.m_z = -7.0f;
link0 = NULL;
for (i = 0; i < 3; i ++) {
// create the a graphic character (use a visualObject as our body
visualObject = new CapsulePrimitive (location, size.m_y, size.m_x);
//create the rigid body
link1 = NewtonCreateBody (nWorld, collision);
// add some damping to each link
NewtonBodySetLinearDamping (link1, 0.2f);
dVector angularDamp (0.2f, 0.2f, 0.2f);
NewtonBodySetAngularDamping (link1, &angularDamp.m_x);
// Set Material Id for this object
NewtonBodySetMaterialGroupID (link1, woodID);
// save the pointer to the graphic object with the body.
NewtonBodySetUserData (link1, visualObject);
// make sure it is active
NewtonWorldUnfreezeBody (nWorld, link1);
//NewtonBodySetAutoFreeze (link1, 0);
// set a destrutor for this rigid body
NewtonBodySetDestructorCallback (link1, PhysicsBodyDestructor);
// set the tranform call back function
NewtonBodySetTransformCallback (link1, PhysicsSetTransform);
// set the force and torque call back funtion
NewtonBodySetForceAndTorqueCallback (link1,PhysicsApplyGravityForce);
// set the mass matrix
NewtonBodySetMassMatrix (link1, mass, Ixx, Iyy, Izz);
// set the matrix for tboth the rigid nody and the graphic body
NewtonBodySetMatrix (link1, &location[0][0]);
PhysicsSetTransform (link1, &location[0][0]);
dVector pivot (location.m_posit);
pivot.m_x += (size.m_x - size.m_y) * 0.5f;
dFloat coneAngle = 10.0 * 3.1416f / 180.0f;
dFloat twistAngle = 10.0 * 3.1416f / 180.0f;
dVector pin (location.m_front.Scale (-1.0f));
joint = new CustomConeLimitedBallAndSocket(twistAngle, coneAngle, pin, pivot, link1, link0);
link0 = link1;
location.m_posit.m_x -= (size.m_x - size.m_y);
}
// release the collision geometry when not need it
NewtonReleaseCollision (nWorld, collision);
}