Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
案例中用的都是LitMaterial,PhysicMaterial我猜测已经废弃了,或者正在完善过程中,Lit挺强大的就用Lit呗