/// <summary>
/// Get the ray into the view volume given by the position in 2D (screen coordinates)
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
public Ray3D GetRay(Point position)
{
Point3D point1, point2;
bool ok = Viewport3DHelper.Point2DtoPoint3D(Viewport, position, out point1, out point2);
if (!ok)
{
return(null);
}
return(new Ray3D {
Origin = point1, Direction = point2 - point1
});
}
