wall_restitution.ts

import { Mesh, PhysicsImpostor} from "@babylonjs/core";
   
export default class wall_left extends Mesh {
//途中省略
  public onStart(): void {
        this.physicsImpostor = new PhysicsImpostor(this, PhysicsImpostor.BoxImpostor, { mass: 0, friction: 0, restitution: 1.0 });

        // ...
  }
//途中省略
}