bytev-charts-beta/lib/plugin/three.js/examples/jsm/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";
import { LinearFilter, RGBFormat, ShaderMaterial, UniformsUtils, WebGLRenderTarget } from "../../../build/three.module.js";
import { Pass } from "../postprocessing/Pass.js";
import { CopyShader } from "../shaders/CopyShader.js";

var SavePass = function SavePass(renderTarget) {
  Pass.call(this);
  if (CopyShader === undefined) console.error("SavePass relies on CopyShader");
  var shader = CopyShader;
  this.textureID = "tDiffuse";
  this.uniforms = UniformsUtils.clone(shader.uniforms);
  this.material = new ShaderMaterial({
    uniforms: this.uniforms,
    vertexShader: shader.vertexShader,
    fragmentShader: shader.fragmentShader
  });
  this.renderTarget = renderTarget;

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

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

SavePass.prototype = _Object$assign(_Object$create(Pass.prototype), {
  constructor: 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);
  }
});
export { SavePass };