bytev-charts/lib/plugin/three.js/examples/js/shaders/TechnicolorShader.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 "core-js/modules/es.array.join.js";
console.warn("THREE.TechnicolorShader: 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.");
/**
 * Technicolor Shader
 * Simulates the look of the two-strip technicolor process popular in early 20th century films.
 * More historical info here: http://www.widescreenmuseum.com/oldcolor/technicolor1.htm
 * Demo here: http://charliehoey.com/technicolor_shader/shader_test.html
 */

THREE.TechnicolorShader = {
  uniforms: {
    "tDiffuse": {
      value: null
    }
  },
  vertexShader: ["varying vec2 vUv;", "void main() {", "	vUv = uv;", "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );", "}"].join("\n"),
  fragmentShader: ["uniform sampler2D tDiffuse;", "varying vec2 vUv;", "void main() {", "	vec4 tex = texture2D( tDiffuse, vec2( vUv.x, vUv.y ) );", "	vec4 newTex = vec4(tex.r, (tex.g + tex.b) * .5, (tex.g + tex.b) * .5, 1.0);", "	gl_FragColor = newTex;", "}"].join("\n")
};