Cesium 与 Babylon.js 可视化 glsl 特效篇（四十三）
我决定不从Babylonjs 基础来讲了 直接整合cesium与babylonjs可视化来讲
我整合一个类库 后续不断更新中
- npm i @haibalai/cesium-babylonjs
初始化cesium -babylonjs 类库， map 是cesium 的viewer对象
- import { BabylonMapManager } from "@haibalai/cesium-babylonjs";
- BabylonMapManager.init(map);
添加特效
- import { BabylonMapManager } from "@haibalai/cesium-babylonjs";
- const fragmentShader =
- `
- #ifdef GL_ES
- precision mediump float;
- #endif
- vec2 resolution = vec2(1.0,1.0);
- varying vec2 vUv;
- #define PI 3.14159265358979323846
- uniform float time;
- voidmain(void)
- {
- float pi = atan(-1.0) * 4.0;
- vec2 uv = (vUv -0.5) * 1.0 ;
- float c = fract(abs(cos(time*1.5)));
- float r = length(uv);
- for (int i = 0; i < 3; ++i)
- {
- float b = (float(i) + 0.5 + time) * pi / 3.0;
- vec2 a = vec2(cos(b), sin(b));
- c = abs(c - smoothstep(0.0, 0.005, clamp(dot(uv, a), 0.0, 0.005)));
- }
- c *= smoothstep(0.145, 0.15, r) - smoothstep(0.495, 0.5, r);
- c *= smoothstep(0.145, 0.15, r) - smoothstep(0.495, 0.5, r);
- c += 1.0 - smoothstep(0.095, 0.1, r);
- c = 1.0 - c; //un-reverse
- gl_FragColor = vec4(c * .95, c * 0.8, 0.0, 0.8) ;
- }
- `
- const vertexShader = `
- attribute vec3 position;
