bytev-charts/lib/plugin/three.js/examples/js/postprocessing/ClearPass.js

基于echarts和JavaScript及ES6封装的一个可以直接调用的图表组件库，内置主题设计，简单快捷，且支持用户自定义配置； npm 安装方式: npm install bytev-charts 若启动提示还需额外install插件,则运行 npm install @babel/runtime-corejs2 即可;

import _Object$assign from "@babel/runtime-corejs2/core-js/object/assign";
import _Object$create from "@babel/runtime-corejs2/core-js/object/create";
console.warn("THREE.ClearPass: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation.");

THREE.ClearPass = function (clearColor, clearAlpha) {
  THREE.Pass.call(this);
  this.needsSwap = false;
  this.clearColor = clearColor !== undefined ? clearColor : 0x000000;
  this.clearAlpha = clearAlpha !== undefined ? clearAlpha : 0;
};

THREE.ClearPass.prototype = _Object$assign(_Object$create(THREE.Pass.prototype), {
  constructor: THREE.ClearPass,
  render: function render(renderer, writeBuffer, readBuffer
  /*, deltaTime, maskActive */
  ) {
    var oldClearColor, oldClearAlpha;

    if (this.clearColor) {
      oldClearColor = renderer.getClearColor().getHex();
      oldClearAlpha = renderer.getClearAlpha();
      renderer.setClearColor(this.clearColor, this.clearAlpha);
    }

    renderer.setRenderTarget(this.renderToScreen ? null : readBuffer);
    renderer.clear();

    if (this.clearColor) {
      renderer.setClearColor(oldClearColor, oldClearAlpha);
    }
  }
});