/// <summary> Set camera by lookat, eyeposition, and camera rotation</summary>
public void SetPositionCamera(Vector3d lookp, Vector3d eyeposp, double camerarotp = 0)
{
lookat = lookp;
eyeposition = eyeposp;
camerarot = camerarotp;
cameradir = eyeposition.AzEl(lookat, true);
}
