cam_pos      = [-1.19133, 1.44868, 0.487599]';
cam_dir      = [0.387801, -0.0385556, 0.920936]';
cam_up       = [0.160406, 0.986702, -0.0262371]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [1.20721, -0.210004, -0.517143]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;