void World::RunPhysics(float frame_dt)
{
if (!_physicsSetUp)
return;
_currentTouches.clear();
// fixed time step
const float physicsDT = 1.0f/60.f;
float total_step = _physicsRemainderDT + frame_dt;
while (total_step >= physicsDT)
{
// more iterations -> more stability, more cpu
// tune to your liking...
GetPhysicsWorld().Step(physicsDT, /*iterations*/ 10);
total_step -= physicsDT;
}
_physicsRemainderDT = total_step;
// update PhysicsActors
for (b2Body* b = GetPhysicsWorld().GetBodyList(); b; b = b->GetNext())
{
b2Vec2 vec = b->GetPosition();
PhysicsActor *physActor = reinterpret_cast<PhysicsActor*>(b->GetUserData());
if (physActor != NULL)
{
physActor->_syncPosRot(vec.x, vec.y, MathUtil::ToDegrees(b->GetAngle()));
}
}
}
void World::WakeAllPhysics()
{
for (b2Body* b = GetPhysicsWorld().GetBodyList(); b; b = b->GetNext())
{
b->WakeUp();
}
}
RuntimeGameObject::~RuntimeGameObject()
{
auto body = _body.lock();
auto world = _gameWorld.lock();
if (body && world)
{
world->GetPhysicsWorld()->DestroyBody(body);
}
}