cam_pos      = [0.264377, 1.46909, 0.787368]';
cam_dir      = [0.288947, -0.0256584, 0.957001]';
cam_up       = [-0.0261078, 0.999058, 0.0346688]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.2728, 0.0465536, -0.383047]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;