cam_pos      = [0.367605, 1.49159, 0.240671]';
cam_dir      = [-0.953617, -0.280135, 0.110181]';
cam_up       = [-0.299925, 0.915445, -0.268337]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [0.0341729, 0.384286, 1.27281]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;