void BasicOECakeReader::addNewCollisionShape(int numParticles, btVector3* particlePositions, btScalar* radii, int materialType, int objectIndex,int color )
{
//create Bullet stuff
btCompoundShape* colShape = 0;
btScalar mass = 0.f;
bool addConstraint = false;
if (materialType&0x800000)
{
addConstraint = true;
}
if ((materialType & 0x20000) ||(materialType & 0x12))
{
mass = 1.f;
}
btTransform startTransform;
startTransform.setIdentity();
{
btTransform localTrans;
localTrans.setIdentity();
//static
btCompoundShape* compound = new btCompoundShape();
for (int i=0;i<numParticles;i++)
{
localTrans.setOrigin(particlePositions[i]);
btSphereShape* particle = new btSphereShape(radii[i]);
compound->addChildShape(localTrans,particle);
}
if (mass)
{
//shift the center of mass, based on all spheres
btCompoundShape* newCompound = shiftTransform(compound,mass,startTransform);
colShape = newCompound;
} else
{
//use unmodified
colShape = compound;
}
}
btDefaultMotionState* myMotionState = 0;
if (colShape)
{
createBodyForCompoundShape(colShape,addConstraint,startTransform,mass);
}
}
btCompoundShape* btFractureBody::shiftTransformDistributeMass(btCompoundShape* boxCompound,btScalar mass,btTransform& shift)
{
btVector3 principalInertia;
btScalar* masses = new btScalar[boxCompound->getNumChildShapes()];
for (int j=0;j<boxCompound->getNumChildShapes();j++)
{
//evenly distribute mass
masses[j]=mass/boxCompound->getNumChildShapes();
}
return shiftTransform(boxCompound,masses,shift,principalInertia);
}
