void OnGotContactCapture(object sender, ContactEventArgs e)
{
FrameworkElement element = (FrameworkElement)e.Source;
FrameworkElement container = ItemsControl.ContainerFromElement(null, element) as FrameworkElement;
if (container != null)
{
element = container;
}
Body body;
if (elementToBody.TryGetValue(element, out body))
{
Point position = e.GetPosition(this);
Vector2D contactPoint = position.ToVector2D();
if (body.Shape.CanGetIntersection)
{
Vector2D temp = body.Matrices.ToBody * contactPoint;
IntersectionInfo intersectionInfo;
if (body.Shape.TryGetIntersection(temp, out intersectionInfo))
{
FixedHingeJoint joint = new FixedHingeJoint(body, contactPoint, new Lifespan());
joint.Softness = 0.3;
engine.AddJoint(joint);
contactJoints[e.Contact.Id] = joint;
}
}
}
SetZTop(element);
}
public void OnNewContact(IntPtr windowHandle, Multitouch.Contracts.IContact contact)
{
Window window = GetWindow(windowHandle);
if (window != null)
{
window.Contacts.Add(new WindowContact(contact));
Body body;
if (windowToBody.TryGetValue(window, out body))
{
NativeMethods.POINT point = new NativeMethods.POINT((int)contact.X, (int)contact.Y);
Vector2D contactPoint = point.ToVector2D();
if (body.Shape.CanGetIntersection)
{
Vector2D temp = body.Matrices.ToBody * contactPoint;
IntersectionInfo intersectionInfo;
if (body.Shape.TryGetIntersection(temp, out intersectionInfo))
{
FixedHingeJoint joint = new FixedHingeJoint(body, contactPoint, new Lifespan());
engine.AddJoint(joint);
contactJoints[contact.Id] = joint;
}
}
}
}
}
public static DisposeCallback RegisterMousePicking(DemoOpenInfo info, MouseButton button)
{
FixedHingeJoint joint = null;
EventHandler <ViewportMouseButtonEventArgs> mouseDown = delegate(object sender, ViewportMouseButtonEventArgs e)
{
if (e.Button == button)
{
IntersectionInfo temp;
Body body = null;
foreach (Body b in info.Scene.Engine.Bodies)
{
Vector2D bodyVertex = b.Matrices.ToBody * e.Position;
if (b.Shape.CanGetIntersection &&
!b.IsBroadPhaseOnly &&
!b.IgnoresPhysicsLogics &&
b.Shape.TryGetIntersection(bodyVertex, out temp))
{
body = b;
break;
}
}
if (body != null)
{
joint = new FixedHingeJoint(body, e.Position, new Lifespan());
info.Scene.Engine.AddJoint(joint);
}
}
};
EventHandler <ViewportMouseMotionEventArgs> mouseMotion = delegate(object sender, ViewportMouseMotionEventArgs e)
{
if (joint != null)
{
joint.Anchor = e.Position;
}
};
EventHandler <ViewportMouseButtonEventArgs> mouseUp = delegate(object sender, ViewportMouseButtonEventArgs e)
{
if (e.Button == button)
{
if (joint != null)
{
joint.Lifetime.IsExpired = true;
joint = null;
}
}
};
info.Viewport.MouseDown += mouseDown;
info.Viewport.MouseUp += mouseUp;
info.Viewport.MouseMotion += mouseMotion;
return(delegate()
{
info.Viewport.MouseDown -= mouseDown;
info.Viewport.MouseUp -= mouseUp;
info.Viewport.MouseMotion -= mouseMotion;
});
}
void OnContactRemoved(object sender, ContactEventArgs e)
{
if (e.Contact.Id == firstContactId)
{
scrollJoint.Lifetime.IsExpired = true;
scrollJoint = null;
firstContactId = null;
}
}
void OnNewContact(object sender, NewContactEventArgs e)
{
if (!firstContactId.HasValue)
{
firstContactId = e.Contact.Id;
startPoint = e.GetPosition(this);
startOffset.X = HorizontalOffset;
startOffset.Y = VerticalOffset;
Vector2D contactPoint = startPoint.ToVector2D();
scrollJoint = new FixedHingeJoint(Body, contactPoint, new Lifespan());
engine.AddJoint(scrollJoint);
}
}