cam_pos      = [0.0391995, 1.10709, 0.908638]';
cam_dir      = [0.809808, 0.483056, 0.332969]';
cam_up       = [-0.584785, 0.61882, 0.524489]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.0629223, 0.82387, -1.0422]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;