///this btDiscreteDynamicsWorld constructor gets created objects from the user, and will not delete those public DiscreteDynamicsWorld(IDispatcher dispatcher, IBroadphaseInterface pairCache, IConstraintSolver constraintSolver, ICollisionConfiguration collisionConfiguration) : base(dispatcher, pairCache, collisionConfiguration) { m_ownsIslandManager = true; m_constraints = new ObjectArray<TypedConstraint>(); m_actions = new List<IActionInterface>(); m_nonStaticRigidBodies = new ObjectArray<RigidBody>(); m_islandManager = new SimulationIslandManager(); m_constraintSolver = constraintSolver; Gravity = new Vector3(0, -10, 0); m_localTime = 1f / 60f; m_profileTimings = 0; m_synchronizeAllMotionStates = false; if (m_constraintSolver == null) { m_constraintSolver = new SequentialImpulseConstraintSolver(); m_ownsConstraintSolver = true; } else { m_ownsConstraintSolver = false; } }
private static void Main(string[] args) { var collisionConfig = new DefaultCollisionConfiguration(); var dispatcher = new CollisionDispatcher(collisionConfig); var pairCache = new DbvtBroadphase(); var solver = new SequentialImpulseConstraintSolver(); var dynamicsWorld = new DiscreteDynamicsWorld(dispatcher, pairCache, solver, collisionConfig); dynamicsWorld.Gravity = new Vector3(0, -10, 0); var groundShape = new BoxShape(new Vector3(50, 50, 50)); var groundTransform = Matrix.CreateTranslation(0, -56, 0); { float mass = 0; bool isDynamic = mass != 0; Vector3 localInertia = Vector3.Zero; if (isDynamic) localInertia = groundShape.CalculateLocalInertia(mass); var motionState = new DefaultMotionState(groundTransform); var rbinfo = new RigidBodyConstructionInfo(mass, motionState, groundShape, localInertia); var body = new RigidBody(rbinfo); dynamicsWorld.AddRigidBody(body); } { var collisionShape = new SphereShape(1); var transform = Matrix.Identity; float mass = 1; bool isDynamic = mass != 0; Vector3 localInertia = Vector3.Zero; if (isDynamic) localInertia = collisionShape.CalculateLocalInertia(mass); transform.Translation = new Vector3(2, 10, 0); var motionState = new DefaultMotionState(transform); var rbinfo = new RigidBodyConstructionInfo(mass, motionState, collisionShape, localInertia); var body = new RigidBody(rbinfo); dynamicsWorld.AddRigidBody(body); } Console.WriteLine("Starting simulation"); for (int i = 0; i < 100; i++) { dynamicsWorld.StepSimulation(1f / 60f, 10); for (int j = dynamicsWorld.GetNumCollisionObjects() - 1; j >= 0; j--) { var obj = dynamicsWorld.GetCollisionObjectArray()[j]; var body = (RigidBody)obj; if (body != null && body.GetMotionState() != null) { Matrix transform = Matrix.Identity; body.GetMotionState().GetWorldTransform(ref transform); Console.WriteLine("Object@{0} Position={1}", body.GetHashCode(), transform.Translation); } } } Console.Read(); }