cam_pos      = [-0.541547, 1.46372, 1.13288]';
cam_dir      = [-0.628808, 0.160153, -0.760889]';
cam_up       = [0.720189, 0.488868, -0.492276]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-0.389868, 1.14052, 0.562251]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;