WXXR/miniprogram/components/xr-customParticle-meshEmitter/index.js

Component({
  behaviors: [require('../common/share-behavior').default],
  properties: {
    capacity: {
      type: Number,
      value: 20
    },
    emitRate: {
      type: Number,
      value: 5
    },
    lifeTime:{
      type: Number,
      value: 3
    }
  },
  data: {
    loaded: false
  },
  lifetimes: {},
  methods: {
    handleReady({detail}) {
        const xrScene = this.scene = detail.value;
        console.log('xr-scene', xrScene);
    },

    handleAssetsProgress: function({detail}) {
      console.log('assets progress', detail.value);
      
    },
    handleAssetsLoaded: function({detail}) {
      console.log('assets loaded', detail.value);
      this.setData({loaded: true});
      this.setMeshRender();
    },
    async setMeshRender(){
        const xrFrameSystem = wx.getXrFrameSystem()
        const magicField = this.scene.getElementById("magicField");
        const tempSystem = magicField.getComponent("custom-particle")
  
        tempSystem.addSizeGradient(0,0.7);
        tempSystem.addSizeGradient(0.5,1.0);
        tempSystem.addColorGradient(0, xrFrameSystem.Vector4.createFromNumber(1,0.89,0.27,1));
        tempSystem.addColorGradient(1, xrFrameSystem.Vector4.createFromNumber(1,0.64,0,1));
        tempSystem.addAlphaGradient(0,0,0);
        tempSystem.addAlphaGradient(0.5,1,1);
        tempSystem.addAlphaGradient(1,0,0);
    }
  }
})