cam_pos      = [-0.333722, 1.39484, 0.54765]';
cam_dir      = [-0.813804, 0.104863, -0.571601]';
cam_up       = [0.568417, 0.34832, -0.745369]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.160848, 1.23888, 0.456283]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;