Arcgis 与 Pixi.js 可视化 glsl 特效篇(十三)
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 = `
- uniform float iTime;
- uniform vec2 iResolution;
- varying vec2 vUv;
- void main(void) {
- vec2 uv = (vUv - 0.5) * 2.0;
- float t = iTime * .1 + ((.25 + .05 * sin(iTime * .1))/(length(uv.xy) + .07)) * 2.2;
- float si = sin(t);
- float co = cos(t);
- mat2 ma = mat2(co, si, -si, co);
- float v1, v2, v3;
- v1 = v2 = v3 = 0.0;
- float s = 0.0;
- for (int i = 0; i < 90; i++)
- {
- vec3 p = s * vec3(uv, 0.0);
- p.xy *= ma;
- p += vec3(.22, .3, s - 1.5 - sin(iTime * .13) * .1);
- for (int i = 0; i < 8; i++) p = abs(p) / dot(p,p) - 0.659;
- v1 += dot(p,p) * .0015 * (1.8 + sin(length(uv.xy * 13.0) + .5 - iTime * .2));
- v2 += dot(p,p) * .0013 * (1.5 + sin(length(uv.xy * 14.5) + 1.2 - iTime * .3));
- v3 += length(p.xy*10.) * .0003;
- s += .035;