bytev-charts/lib/plugin/three.js/examples/js/shaders/LuminosityHighPassShader.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.LuminosityHighPassShader: 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.");
/**
 * Luminosity
 * http://en.wikipedia.org/wiki/Luminosity
 */

THREE.LuminosityHighPassShader = {
  shaderID: "luminosityHighPass",
  uniforms: {
    "tDiffuse": {
      value: null
    },
    "luminosityThreshold": {
      value: 1.0
    },
    "smoothWidth": {
      value: 1.0
    },
    "defaultColor": {
      value: new THREE.Color(0x000000)
    },
    "defaultOpacity": {
      value: 0.0
    }
  },
  vertexShader: ["varying vec2 vUv;", "void main() {", "	vUv = uv;", "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );", "}"].join("\n"),
  fragmentShader: ["uniform sampler2D tDiffuse;", "uniform vec3 defaultColor;", "uniform float defaultOpacity;", "uniform float luminosityThreshold;", "uniform float smoothWidth;", "varying vec2 vUv;", "void main() {", "	vec4 texel = texture2D( tDiffuse, vUv );", "	vec3 luma = vec3( 0.299, 0.587, 0.114 );", "	float v = dot( texel.xyz, luma );", "	vec4 outputColor = vec4( defaultColor.rgb, defaultOpacity );", "	float alpha = smoothstep( luminosityThreshold, luminosityThreshold + smoothWidth, v );", "	gl_FragColor = mix( outputColor, texel, alpha );", "}"].join("\n")
};