cam_pos      = [-0.616586, 0.914185, -0.137893]';
cam_dir      = [0.749545, 0.0767473, -0.657489]';
cam_up       = [0.661408, -0.0465053, 0.748583]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.0357439, 1.32463, 0.113873]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;