cam_pos      = [-0.24356, 1.19168, 1.24081]';
cam_dir      = [0.720313, -0.0293871, -0.693027]';
cam_up       = [-0.224878, 0.935247, -0.273391]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.872726, -0.469189, -0.887192]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;