Exemplo n.º 1
0
        private static void PollSelection(GameWindow window, MouseState mouseState, KeyboardState keyboardState)  // TODO: raycast is performed wrong on shapes' edges; check!
        {
            var startWorld = RaycastResult.StartWorld.ToBullet3();
            var endWorld   = RaycastResult.EndWorld.ToBullet3();

            using (var raycastCallback = new ClosestRayResultCallback(ref startWorld, ref endWorld))
            {
                PhysicsHandler.RayTestRef(ref startWorld, ref endWorld, raycastCallback);
                if (/*window.IsMouseButtonPressed(MouseButton.Right)*/ mouseState.IsButtonDown(MouseButton.Right) && _lastState.IsButtonUp(MouseButton.Right))  // TODO: perhaps use Window built-in method?
                {
                    if (raycastCallback.HasHit)
                    {
                        if (!keyboardState.IsKeyDown(Key.ControlLeft) && SelectedObjects.Find(x => x != raycastCallback.CollisionObject) != null)
                        {
                            // Control is not pressed and other objects are already selected ---> clear selection and add the new object to the selection
                            ClearAndAddSelection(raycastCallback.CollisionObject);
                        }
                        else
                        {
                            // add the object to the selection if it's not there yet
                            if (!SelectedObjects.Contains(raycastCallback.CollisionObject))
                            {
                                AddSelection(raycastCallback.CollisionObject);
                            }
                            else
                            {
                                RemoveSelection(raycastCallback.CollisionObject);
                            }
                        }
                    }
                    else
                    {
                        // no object is selected ---> clear selection
                        ClearSelection();
                    }
                }
            }
        }