private static void IsCollidableChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
PhysicsController physicsController = FindParentPhysicsController(d);
if (physicsController != null)
{
foreach (Body body in physicsController.Engine.Bodies)
{
if (body.Tag != null && body.Tag.Equals(d))
body.IsCollidable = (bool)e.NewValue;
}
}
}
void CreateNewBody(FrameworkElement element)
{
double angle = 0;
if (element.RenderTransform is RotateTransform)
angle = ((RotateTransform)element.RenderTransform).Angle;
PhysicsState state = new PhysicsState(new ALVector2D(angle, Canvas.GetLeft(element) + (element.ActualWidth / 2),
Canvas.GetTop(element) + (element.ActualHeight / 2)));
Shape shape = new PolygonShape(PolygonShape.CreateRectangle(element.ActualHeight, element.ActualWidth), 2);
MassInfo mass = MassInfo.FromPolygon(shape.Vertexes, 1);
Body body = new CustomBody(state, shape, mass, new Coefficients(0, 1), new Lifespan());
body.LinearDamping = 0.95;
body.AngularDamping = 0.95;
body.IsCollidable = GetIsCollidable(element);
body.Tag = element;
PhysicsController controller = FindParentPhysicsController(element);
if (controller != null)
controller.engine.AddBody(body);
itemToBody.Add(element, body);
}
private static void EnablePhysicsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FrameworkElement element = d as FrameworkElement;
if (element == null)
throw new ArgumentException("Only FrameworkElement, and it descendants, are supported");
PhysicsController controller = FindParentPhysicsController(element);
if (controller != null)
{
if ((bool)e.NewValue)
element.SizeChanged += controller.Element_SizeChanged;
else
{
element.SizeChanged -= controller.Element_SizeChanged;
Body body;
if(controller.itemToBody.TryGetValue(element, out body))
{
body.Lifetime.IsExpired = true;
controller.itemToBody.Remove(element);
}
}
}
}