cam_pos      = [0.790932, 1.3, 1.46227]';
cam_dir      = [-0.0217992, 0, -0.999762]';
cam_up       = [0, 1, 0]';
cam_lookat   = [0, 0, 1]';
cam_sky      = [0, 1, 0]';
cam_right    = [-1.32968, 0, 0.0289929]';
cam_fpoint   = [0, 0, 1]';
cam_angle    = 90;