bytev-charts-beta/lib/plugin/three.js/examples/js/postprocessing/SavePass.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";
import "core-js/modules/es.function.name.js";
console.warn("THREE.SavePass: 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.SavePass = function (renderTarget) {
  THREE.Pass.call(this);
  if (THREE.CopyShader === undefined) console.error("THREE.SavePass relies on THREE.CopyShader");
  var shader = THREE.CopyShader;
  this.textureID = "tDiffuse";
  this.uniforms = THREE.UniformsUtils.clone(shader.uniforms);
  this.material = new THREE.ShaderMaterial({
    uniforms: this.uniforms,
    vertexShader: shader.vertexShader,
    fragmentShader: shader.fragmentShader
  });
  this.renderTarget = renderTarget;

  if (this.renderTarget === undefined) {
    this.renderTarget = new THREE.WebGLRenderTarget(window.innerWidth, window.innerHeight, {
      minFilter: THREE.LinearFilter,
      magFilter: THREE.LinearFilter,
      format: THREE.RGBFormat,
      stencilBuffer: false
    });
    this.renderTarget.texture.name = "SavePass.rt";
  }

  this.needsSwap = false;
  this.fsQuad = new THREE.Pass.FullScreenQuad(this.material);
};

THREE.SavePass.prototype = _Object$assign(_Object$create(THREE.Pass.prototype), {
  constructor: THREE.SavePass,
  render: function render(renderer, writeBuffer, readBuffer) {
    if (this.uniforms[this.textureID]) {
      this.uniforms[this.textureID].value = readBuffer.texture;
    }

    renderer.setRenderTarget(this.renderTarget);
    if (this.clear) renderer.clear();
    this.fsQuad.render(renderer);
  }
});