webgl+canvas实现shader着色器喷绘背景动画效果代码-html代码-BFW代码库

webgl+canvas实现shader着色器喷绘背景动画效果代码

代码语言：html

所属分类：动画

代码描述：webgl+canvas实现shader着色器喷绘背景动画效果代码

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">
<link type="text/css" rel="stylesheet" href="//repo.bfw.wiki/bfwrepo/css/reset.min.css">
<style>
    html, body {
  padding: 0px;
  margin: 0px;
  overflow: hidden;
}

canvas {
  width: 100%;
  height: 100%;
}
</style>
</head>
<body>
<!-- partial:index.partial.html -->
<script id="2d-fragment-shader" type="x-shader/x-fragment">// <![CDATA[
  #ifdef GL_ES
  precision highp float;
  #endif

  #define PI 3.14159265359;

  uniform vec2 u_resolution;
  uniform vec2 u_mouse;
  uniform float u_time;
  uniform float u_xpos;
  uniform float u_ypos;

vec3 mod289(vec3 x) {
  return x - floor(x * (1.0 / 289.0)) * 289.0;
}

vec4 mod289(vec4 x) {
  return x - floor(x * (1.0 / 289.0)) * 289.0;
}

vec4 permute(vec4 x) {
     return mod289(((x*34.0)+1.0)*x);
}

vec4 taylorInvSqrt(vec4 r)
{
  return 1.79284291400159 - 0.85373472095314 * r;
}

float snoise(vec3 v)
  { 
  const vec2  C = vec2(1.0/6.0, 1.0/3.0) ;
  const vec4  D = vec4(0.0, 0.5, 1.0, 2.0);

  vec3 i  = floor(v + dot(v, C.yyy) );
  vec3 x0 =   v - i + dot(i, C.xxx) ;

  vec3 g = step(x0.yzx, x0.xyz);
  vec3 l = 1.0 - g;
  vec3 i1 = min( g.xyz, l.zxy );
  vec3 i2 = max( g.xyz, l.zxy );

  vec3 x1 = x0 - i1 + C.xxx;
  vec3 x2 = x0 - i2 + C.yyy;
  vec3 x3 = x0 - D.yyy;

  i = mod289(i); 
  vec4 p = permute( permut.........完整代码请登录后点击上方下载按钮下载查看