Arcgis 与 Claygl 可视化 glsl 特效篇（三十七）-526互联

我决定不从claygl基础来讲了直接整合arcgis与claygl可视化来讲
关于整合clagyl 有兴趣看我这篇文章 arcgis 与 claygl 引擎结合做地图可视化

我整合一个类库后续不断更新中

初始化gismap4-claygl 类库， view是arcgis的sceneView对象

添加特效

import { ClayglMapManager} from "@haibalai/gismap4-claygl";
import * as clay from "claygl";
const fragmentShader =`
#ifdef GL_ES
precision highp float;
#endif
#extension GL_OES_standard_derivatives : enable
uniform float time;
uniform vec2 mouse;
vec2 resolution = vec2(1.0,1.0);
varying vec2 vUv;
floatsnow(vec2 uv,float scale)
{
float _t = time * 0.35;
uv.x+=_t/scale;
uv*=scale;vec2 s=floor(uv),f=fract(uv),p;float k=0.5,d;
p=.5+.35*sin(11.*fract(sin((s+p+scale)*mat2(7,3,6,5))*5.))-f;d=length(p);k=min(d,k);
k=smoothstep(0.0008,k,sin(f.x+f.y)*0.003);
return k;
}
voidmain(void){
vec2 uv = (vUv -0.5) * 2.0 ;
float dd = 1.0-length(uv);
uv.x += sin(time*0.48);
uv.y += sin(uv.x*-1.4)*0.2;
uv.x *= 0.09;
float c=snow(uv,30.)*.3;
c+=snow(uv,25.)*.5;
c+=snow(uv,35.)*.8;
c+=snow(uv,10.);
c+=snow(uv,20.);
c+=snow(uv,8.);
c+=snow(uv,10.);
c*=0.2/dd;
vec3 finalColor=(vec3(1,0.5,3.2))*c*100.0;
gl_FragColor = vec4(finalColor,1.);
}
`
const vertexShader = `
attribute vec3 position: POSITION;
uniform mat4 worldViewProjection : WORLDVIEWPROJECTION;
attribute vec2 uv : TEXCOORD_0;