webgl实现canvas万花筒屏保动画效果代码-html代码-BFW代码库

webgl实现canvas万花筒屏保动画效果代码

代码语言：html

所属分类：动画

代码描述：webgl实现canvas万花筒屏保动画效果代码

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+2.5)
#define S smoothstep
#define hue(a) (.6+.6*cos(6.3*(a)+vec3(0,83,21)))
void pR(inout vec2 p, float a) {
	p=cos(a)*p+sin(a)*vec2(-p.y,p.x);}
float poly(vec2 p, float n) {
	float
	a=atan(p.x,p.y),
	b=6.28318/n;
	return cos(floor(.5+a/b)*b-a)*length(p);
}
vec3 pattern0(vec2 uv) {
	vec2 p=uv*3.;
	vec3 col=vec3(0);
	for (float i=.0; i++<4.;) {
		pR(p,.785398);
		p=fract(p)-.5;
		float d=length(p*p);
		d=sin(12.*d+i*T*.5)*.62;
		d=abs(d);
		col+=pow(.05/d,1.2)*hue(dot(p,uv)*i+T*.2);
	}
	return col;
}
vec3 pattern1(vec2 uv) {
	vec2 p=uv*2.;
	vec3 col=vec3(0);
	for (float i=.0; i++<4.;) {
		pR(p,.785398);
		p=fract(p)-.5;
		float d=length(p);
		d=sin(14.*d+T)*.8;
		d=abs(d);
		col+=(.05/d)*hue(dot(uv,uv)+i*.125+T*.2);
		p*=1.618;
	}
	return col;
}
vec3 pattern2(vec2 uv) {
	vec2 p=uv*1.5;
  vec3 col = vec3(0);
  const float n = 3.5;
  for (float i = .0; i < 6.; i++) {
    p.........完整代码请登录后点击上方下载按钮下载查看