Mapbox 与 Babylon.js 可视化 glsl 特效篇（五）

我决定不从Babylonjs 基础来讲了 直接整合mapbox与babylonjs可视化来讲

我整合一个类库 后续不断更新中

npm i @haibalai/mapbox-babylonjs

初始化mapbox-babylonjs 类库， map 是mapbox.gl 的map 对象

import { BabylonMapManager } from “@haibalai/mapbox-babylonjs”;
BabylonMapManager.init(map);

添加特效

import { BabylonMapManager } from “@haibalai/mapbox-babylonjs”;
 const fragmentShader = `
 uniform float ratio;
 float M_PI = 3.1415926;
 float M_TWO_PI = 6.28318530718;
 vec3 iMouse = vec3(0.0, 0.0 ,0.0 );
 uniform float iTime;
 const vec2 iResolution = vec2(1.0,1.0);
 varying vec2 vUv;
 floatrand(vec2 n) {
 return fract(sin(dot(n, vec2(12.9898,12.1414))) * 83758.5453);
 }
 floatnoise(vec2 n) {
 const vec2 d = vec2(0.0, 1.0);
 vec2 b = floor(n);
 vec2 f = smoothstep(vec2(0.0), vec2(1.0), fract(n));
 return mix(mix(rand(b), rand(b + d.yx), f.x), mix(rand(b + d.xy), rand(b + d.yy), f.x), f.y);
 }
 vec3 ramp(float t) {
 return t <= .5 ? vec3( 1. - t * 1.4, .2, 1.05 ) / t : vec3( .3 * (1. - t) * 2., .2, 1.05 ) / t;
 }
 vec2 polarMap(vec2 uv, float shift, float inner) {
 uv = vec2(0.5) - uv;
 float px = 1.0 - fract(atan(uv.y, uv.x) / 6.28 + 0.25) + shift;
 float py = (sqrt(uv.x * uv.x + uv.y * uv.y) * (1.0 + inner * 2.0) - inner) * 2.0;
 return vec2(px, py);

Mapbox 与 Babylon.js 可视化 glsl 特效篇（五） － 小专栏