public static DisposeCallback RegisterBodyTracking(DemoOpenInfo info, Body body, Matrix2x3 transformation)
{
EventHandler handler = delegate(object sender, EventArgs e)
{
info.Viewport.ToScreen =
Matrix2x3.FromTranslate2D(new Vector2D(info.Viewport.X + info.Viewport.Width * .5f, info.Viewport.Y + info.Viewport.Height * .5f)) *
transformation *
body.Matrices.ToBody
;
};
body.PositionChanged += handler;
return(delegate()
{
body.PositionChanged -= handler;
});
}