Shadow
API
ShadowGenerator
const shadowGenerator = new ShadowGenerator( mapSize: number, light: IShadowLight, usefullFloatFirst?: boolean, camera?: Nullable<Camera>, useRedTextureType?: boolean);
shadowGenerator.addShadowCaster( mesh: AbstractMesh, includeDescendants?: boolean, // 是否添加后代,默认为 true);
// 物体设置接收阴影mesh.receiveShadows = true;