cam_pos      = [0.655049, 1.44466, 1.30297]';
cam_dir      = [-0.389305, -0.152104, 0.908464]';
cam_up       = [-0.127459, 0.985679, 0.110412]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.21329, 0.0968341, 0.536146]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;