cam_pos      = [0.883321, 1.72291, 1.65982]';
cam_dir      = [0.173899, -0.0275201, -0.984379]';
cam_up       = [-0.291249, 0.953453, -0.0781073]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-1.25114, -0.399375, -0.209861]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;