bytev-charts/lib/plugin/three.js/examples/js/shaders/HorizontalTiltShiftShader.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.HorizontalTiltShiftShader: 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.");
/**
 * Simple fake tilt-shift effect, modulating two pass Gaussian blur (see above) by vertical position
 *
 * - 9 samples per pass
 * - standard deviation 2.7
 * - "h" and "v" parameters should be set to "1 / width" and "1 / height"
 * - "r" parameter control where "focused" horizontal line lies
 */

THREE.HorizontalTiltShiftShader = {
  uniforms: {
    "tDiffuse": {
      value: null
    },
    "h": {
      value: 1.0 / 512.0
    },
    "r": {
      value: 0.35
    }
  },
  vertexShader: ["varying vec2 vUv;", "void main() {", "	vUv = uv;", "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );", "}"].join("\n"),
  fragmentShader: ["uniform sampler2D tDiffuse;", "uniform float h;", "uniform float r;", "varying vec2 vUv;", "void main() {", "	vec4 sum = vec4( 0.0 );", "	float hh = h * abs( r - vUv.y );", "	sum += texture2D( tDiffuse, vec2( vUv.x - 4.0 * hh, vUv.y ) ) * 0.051;", "	sum += texture2D( tDiffuse, vec2( vUv.x - 3.0 * hh, vUv.y ) ) * 0.0918;", "	sum += texture2D( tDiffuse, vec2( vUv.x - 2.0 * hh, vUv.y ) ) * 0.12245;", "	sum += texture2D( tDiffuse, vec2( vUv.x - 1.0 * hh, vUv.y ) ) * 0.1531;", "	sum += texture2D( tDiffuse, vec2( vUv.x, vUv.y ) ) * 0.1633;", "	sum += texture2D( tDiffuse, vec2( vUv.x + 1.0 * hh, vUv.y ) ) * 0.1531;", "	sum += texture2D( tDiffuse, vec2( vUv.x + 2.0 * hh, vUv.y ) ) * 0.12245;", "	sum += texture2D( tDiffuse, vec2( vUv.x + 3.0 * hh, vUv.y ) ) * 0.0918;", "	sum += texture2D( tDiffuse, vec2( vUv.x + 4.0 * hh, vUv.y ) ) * 0.051;", "	gl_FragColor = sum;", "}"].join("\n")
};