webgl实现canvas光速穿越飞行动画效果代码-html代码-BFW代码库

webgl实现canvas光速穿越飞行动画效果代码

代码语言：html

所属分类：动画

代码描述：webgl实现canvas光速穿越飞行动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">
  

  
  
</head>

<body translate="no">
  <script type="x-shader/x-fragment">#version 300 es
/*********
* made by Matthias Hurrle (@atzedent)
*/   
precision highp float;
out vec4 O;
uniform float time;
uniform vec2 resolution;
#define FC gl_FragCoord.xy
#define R resolution
#define T time
#define hue(a) (.6+.6*cos(6.3*(a)+vec3(0,83,21)))
float rnd(float a) {
        vec2 p=fract(a*vec2(12.9898,78.233));   p+=dot(p,p*345.);
        return fract(p.x*p.y);
}
vec3 pattern(vec2 uv) {
        vec3 col=vec3(0);
        for (float i=.0; i++<20.;) {
                float a=rnd(i);
                vec2 n=vec2(a,fract(a*34.56)), p=sin(n*(T+7.)+T*.5);
                float d=dot(uv-p,uv-p);
                col+=.00125/d*hue(dot(uv,uv)+i*.125+T);
        }
        return col;
}
void main(void) {
        vec2 uv=(FC-.5*R)/min(R.x,R.y);
        vec3 col=vec3(0);
        float s=2.4,
        a=atan(uv.x,uv.y),
        b=length(uv);
        uv=vec2(a*5./6.28318,.05/tan(b)+T);
        uv=fract(uv)-.5;
        col+=pattern(uv*s);
        O=vec4(col,1);
}</script>
  
      <script id="rendered-js" >
window.onload = init
function init() {
  let renderer, canvas
  const dpr = Math.max(1, .5*devicePixelRatio)
  const resize = () => {
    const { innerWidth: width, innerHeight: height } = window
    canvas.width = width * dpr
    canvas.height = height * dpr
    if (renderer) {
      renderer.updateScale(dpr)
    }
  }
  const source = document.querySelector("script[type='x-shader/x-fragment']").textContent
  canvas = document.createElement("canvas")
  document.title = "😌"
  document.body.innerHTML = ""
  document.body.appendChild(canvas)
  document.body.style = "margin:0;touch-action:none;overflow:hidden"
  canvas.style.width = "100%"
  canvas.style.height = "auto"
  canvas.style.userSelect = "none"
  renderer = new Renderer(canvas, dpr)
  renderer.setup()
  renderer.init()
  resize()
  if (renderer.test(source) === null) {
    renderer.updateShader(source)
  }
  window.onresize = resize
  const loop = (now) => {
    renderer.render(now)
    requestAnimationFrame(loo.........完整代码请登录后点击上方下载按钮下载查看