cam_pos      = [1.48265, 1.28596, 1.40692]';
cam_dir      = [-0.406064, 0.0368808, -0.9131]';
cam_up       = [0.0389591, 0.998976, 0.0230239]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-1.21431, 0.0348785, 0.541423]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;