trois/src/core/Scene.js

import { Scene, Color } from 'three';
import { watch } from 'vue';

export default {
  name: 'Scene',
  inject: ['three'],
  props: {
    id: String,
    background: [String, Number],
  },
  setup(props) {
    const scene = new Scene();
    if (props.background) scene.background = new Color(props.background);
    watch(() => props.background, (value) => { scene.background = new Color(value); });
    return { scene };
  },
  provide() {
    return {
      scene: this.scene,
    };
  },
  mounted() {
    if (!this.three.scene) {
      this.three.scene = this.scene;
    }
  },
  methods: {
    add(o) { this.scene.add(o); },
    remove(o) { this.scene.remove(o); },
  },
  render() {
    return this.$slots.default ? this.$slots.default() : [];
  },
};