void BulletPhysics::SendCollisionPairAddEvent(const btPersistentManifold* manifold, const btRigidBody* body0, const btRigidBody* body1)
{
// send an event for 2 bodies colliding
if (body0->getUserPointer() || body1->getUserPointer())
{
// only triggers have non NULL user pointers, so this is a trigger collision
const btRigidBody* triggerBody;
const btRigidBody* otherBody;
if (body0->getUserPointer())
{
// body0 is the trigger
triggerBody = body0;
otherBody = body1;
}
else
{
// body1 is the trigger
otherBody = body0;
triggerBody = body1;
}
// send trigger event
const int triggerId = *static_cast<int*>(triggerBody->getUserPointer());
shared_ptr<Event_PhysTriggerEnter> pEvent(CB_NEW Event_PhysTriggerEnter(triggerId, FindObjectId(otherBody)));
IEventManager::Get()->QueueEvent(pEvent);
}
else
{
// two non-trigger bodies
const GameObjectId id0 = FindObjectId(body0);
const GameObjectId id1 = FindObjectId(body1);
if (id0 == INVALID_GAMEOBJECT_ID || id1 == INVALID_GAMEOBJECT_ID)
{
// something collided with a non game object, ignore it
return;
}
// send collision began event
Vec3List collisionPoints;
Vec3 sumNormalForce;
Vec3 sumFrictionForce;
for (int i = 0; i < manifold->getNumContacts(); i++)
{
const btManifoldPoint& point = manifold->getContactPoint(i);
collisionPoints.push_back(btVector3_to_Vec3(point.getPositionWorldOnB()));
sumNormalForce += btVector3_to_Vec3(point.m_combinedRestitution * point.m_normalWorldOnB);
sumFrictionForce += btVector3_to_Vec3(point.m_combinedFriction * point.m_lateralFrictionDir1);
}
// send game event
shared_ptr<Event_PhysCollision> pEvent(CB_NEW Event_PhysCollision(id0, id1, sumNormalForce, sumFrictionForce, collisionPoints));
IEventManager::Get()->QueueEvent(pEvent);
}
}
/* virtual */
void
ParticleSystem::Draw()
{
// this is slow!
Vec3List parts;
parts.reserve(numParticles);
FOR_EACH(pIt, particles) {
Particle* p = *pIt;
if (not p->alive)
continue;
parts.push_back(p->pos);
}