Cesium 与 Babylon.js 可视化 glsl 特效篇（三十）
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 = `
- uniform float iTime;
- const vec2 iResolution = vec2(1.0,1.0);
- varying vec2 vUv;
- #define POINT_COUNT 8
- vec2 points[POINT_COUNT];
- constfloat speed = -0.5;
- constfloat len = 0.25;
- constfloat scale = 0.012;
- float intensity = 1.3;
- float radius = 0.015;
- //https://www.shadertoy.com/view/MlKcDD
- //Signed distance to a quadratic bezier
- floatsdBezier(vec2 pos, vec2 A, vec2 B, vec2 C){
- vec2 a = B - A;
- vec2 b = A - 2.0*B + C;
- vec2 c = a * 2.0;
- vec2 d = A - pos;
- float kk = 1.0 / dot(b,b);
- float kx = kk * dot(a,b);
- float ky = kk * (2.0*dot(a,a)+dot(d,b)) / 3.0;
- float kz = kk * dot(d,a);
- float res = 0.0;
- float p = ky - kx*kx;
- float p3 = p*p*p;
- float q = kx*(2.0*kx*kx - 3.0*ky) + kz;
- float h = q*q + 4.0*p3;
