这次我们用pixi.js和arcgis js结合
我们先定义一下 传入数据结构 symbol 暂时不做
- let option = {
- renderer: {
- type: "simple",
- symbol: {
- }
- },
- data: [
- {
- geometry: [12956152.73135875, 4855356.473704897],
- attributes: {
- name: "北京"
- }
- },
- {
- geometry: [12697872.012783196, 2577456.5937789795],
- attributes: {
- name: "深圳"
- }
- }
- ]
- };
对于data 数据 ,
toScreen 方法参考链接提示
app 的构建参考 链接提示
- let data = this.options.data;
- for(let item of data){
- //转换屏幕坐标,获取颜色,半径和线条粗细样式
- let geo = item.geometry
- let XY1 = toScreen(geo);
- const geometry = new PIXI.Geometry()
- .addAttribute("position", [100, 100, -100, 100, -100, -100, 100, -100, 200, 200], 2)
- .addAttribute('uv', // the attribute name
- [0, 0, // u, v
- 1, 0, // u, v
- 1, 1,
- 0, 1], // u, v
- 2)
- .addIndex([0, 1, 2, 0, 2, 3]);
- const fragmentShader = `
- precision highp float;
- uniform float iTime;
- uniform vec2 iResolution;
- varying vec2 vUv;
- // Rand value between 0 and 1
- float rand(vec2 p) {
- return fract(sin(dot(p, vec2(12.543,514.123)))*4732.12);
- }
- // Value noise
- float noise(vec2 p) {
- vec2 f = smoothstep(0.0, 1.0, fract(p));
- vec2 i = floor(p);
- float a = rand(i);
- float b = rand(i+vec2(1.0,0.0));
- float c = rand(i+vec2(0.0,1.0));
- float d = rand(i+vec2(1.0,1.0));
- return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
- }
- // Fractal noise
- float fbm(vec2 p) {
- float a = 0.5;
- float r = 0.0;
- for (int i = 0; i < 8; i++) {
- r += a*noise(p);
- a *= 0.5;
- p *= 2.0;
- }
- return r;
- }
- Arcgis 与 Pixi.js 可视化 glsl 特效篇(十七) - 小专栏
发布于 2023-06-16 13:52・IP 属地广东 标签:glsl,rand,float,js,Arcgis,vec2,let,100 From: https://www.cnblogs.com/haibalai/p/17719302.html