bytev-charts/lib/plugin/three.js/examples/jsm/shaders/LuminosityShader.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";

/**
 * Luminosity
 * http://en.wikipedia.org/wiki/Luminosity
 */
var LuminosityShader = {
  uniforms: {
    "tDiffuse": {
      value: null
    }
  },
  vertexShader: ["varying vec2 vUv;", "void main() {", "	vUv = uv;", "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );", "}"].join("\n"),
  fragmentShader: ["#include <common>", "uniform sampler2D tDiffuse;", "varying vec2 vUv;", "void main() {", "	vec4 texel = texture2D( tDiffuse, vUv );", "	float l = linearToRelativeLuminance( texel.rgb );", "	gl_FragColor = vec4( l, l, l, texel.w );", "}"].join("\n")
};
export { LuminosityShader };