public static Rectangle CalculateScissors(Camera camera, Matrix batchTransform, Rectangle area)
{
Vector3 pos = Vector3.Transform(new Vector3(area.X, area.Y, 0), batchTransform);
pos = camera.Project(pos);
Vector3 size = Vector3.Transform(new Vector3(area.X + area.Width, area.Y + area.Height, 0), batchTransform);
size = camera.Project(size);
return new Rectangle((int)pos.X, (int)pos.Y, (int)size.X - (int)pos.X, (int)size.Y - (int)pos.Y);
}
public static Vector2 ToWindowCoordinates(Camera camera, Matrix transform, Vector2 point)
{
Vector3 vec = Vector3.Transform(new Vector3(point, 0), transform);
vec = camera.Project(vec);
vec.Y = camera.GraphicsDevice.Viewport.Height - vec.Y;
return new Vector2(vec.X, vec.Y);
}
