Arcgis 与 Claygl 可视化 glsl 特效篇（八）
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
- npm i @haibalai/gismap4-claygl
初始化gismap4-claygl 类库， view是arcgis的sceneView对象
- import { ClayglMapManager} from "@haibalai/gismap4-claygl";
- ClayglMapManager.init(view);
添加特效
- import { ClayglMapManager} from "@haibalai/gismap4-claygl";
- import * as clay from "claygl";
- const fragmentShader = `
- #define SMOOTH(r,R) (1.0-smoothstep(R-1.0,R+1.0, r))
- #define RANGE(a,b,x) ( step(a,x)*(1.0-step(b,x)) )
- #define RS(a,b,x) ( smoothstep(a-1.0,a+1.0,x)*(1.0-smoothstep(b-1.0,b+1.0,x)) )
- #define M_PI 3.1415926535897932384626433832795
- #define blue1 vec3(0.74,0.95,1.00)
- #define blue2 vec3(0.87,0.98,1.00)
- #define blue3 vec3(0.35,0.76,0.83)
- #define blue4 vec3(0.953,0.969,0.89)
- #define red vec3(1.00,0.38,0.227)
- #define MOV(a,b,c,d,t) (vec2(a*cos(t)+b*cos(0.1*(t)), c*sin(t)+d*cos(0.1*(t))))
- constfloat ratio = 1.0;
- float PI = 3.1415926;
- uniform float iTime;
- const vec2 iResolution = vec2(1200.0,1200.0);
- varying vec2 vUv;
- floatmovingLine(vec2 uv, vec2 center, float radius)
- {
- //angle of the line
- float theta0 = 90.0 * iTime;
- vec2 d = uv - center;
- float r = sqrt( dot( d, d ) );
- if(r<radius)
- {
- //compute the distance to the line theta=theta0
- vec2 p = radius*vec2(cos(theta0*M_PI/180.0),
- -sin(theta0*M_PI/180.0));
- float l = length( d - p*clamp( dot(d,p)/dot(p,p), 0.0, 1.0) );
- d = normalize(d);
- //compute gradient based on angle difference to theta0
- float theta = mod(180.0*atan(d.y,d.x)/M_PI+theta0,360.0);
- float gradient = clamp(1.0-theta/90.0,0.0,1.0);
- return SMOOTH(l,1.0)+0.5*gradient;
- }
- elsereturn 0.0;
- }
- floatcircle(vec2 uv, vec2 center, float radius, float width)
- {
- float r = length(uv - center);
- return SMOOTH(r-width/2.0,radius)-SMOOTH(r+width/2.0,radius);
- }
