/// <summary>
/// World to screen (pixel)
/// </summary>
/// <param name="src"></param>
/// <param name="frame"></param>
/// <returns></returns>
public Vector3f ProjectedCoordinatesOf( Vector3f src, Frame frame )
{
Vector3f tmp;
if( frame != null )
{
tmp = frame.InverseCoordinatesOf( src );
}
else
{
tmp = src;
}
Vector4f clip = ProjectionViewMatrix * new Vector4f( tmp, 1.0f );
Vector3f ndc = clip.Homogenized();
float sx = ScreenSize.x * 0.5f * ( ndc.x + 1.0f );
float sy = ScreenSize.y * 0.5f * ( ndc.y + 1.0f );
// OpenGL
// float sz = 0.5f * ( ndc.Z + 1.0f );
// D3D
float sz = ndc.z;
// float w = 1;
return new Vector3f( sx, sy, sz );
}
