cam_pos      = [-1.16548, 1.64488, -0.200174]';
cam_dir      = [0.072731, -0.404222, 0.911765]';
cam_up       = [0.0929624, 0.912954, 0.397333]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.3207, -0.0742957, -0.138289]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;