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

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;