用regl.js实现催眠动画特效-html代码-BFW代码库

用regl.js实现催眠动画特效

代码语言：html

所属分类：动画

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">

<title> Rainbow Colored Hexagon Stars</title>
<style>
      .ui {
  position: absolute;
  z-index: 1;
}

label {
  display: block;
  font-size: .8;
}

    </style>

</head>
<body translate="no">
<script id="fragmentShader" type="x-shader/fragment">
precision highp float;
uniform float time;
uniform float width;
uniform float height;

const float PI = 3.141592654;
const float DEG = PI / 180.0;

vec2 coords() {
  float vmin = min(width, height);  
  return vec2((gl_FragCoord.x - width * .5) / vmin, 
              (gl_FragCoord.y - height * .5) / vmin);
}  

vec2 rotate(vec2 p, float a) {
  return vec2(p.x * cos(a) - p.y * sin(a),
              p.x * sin(a) + p.y * cos(a));
}

vec2 repeat(in vec2 p, in vec2 c) {
  return mod(p, c) - 0.5 * c;
}

// Distance functions by Inigo Quilez  
// https://iquilezles.org/www/articles/distfunctions2d/distfunctions2d.htm
float circle(in vec2 p, in vec2 pos, float radius) {
  return length(p - pos) - radius;
}

float box(in vec2 p, in vec2 pos, in vec2 b) {
  vec2 d = abs(p - pos) - b;
  return length(max(d, vec2(0))) + min(max(d.x, d.y), 0.0);
}

float triangle(in vec2 p, in float h) {
  const float k = sqrt(3.0);
  p.x = abs(p.x) - h;
  p.y = p.y + h / k;
  if( p.x + k*p.y > 0.0 ) p = vec2(p.x-k*p.y,-k*p.x-p.y)/2.0;
  p.x -= clamp( p.x, -2.0, 0.0 );
  return -length(p)*sign(p.y);
}  
  
float hexagon(in vec2 p, in vec2 pos, in float r) {
  const vec3 k = vec3(-0.866025404,0.5,0.577350269);
  p = abs(p - pos);
  p -= 2.0*min(dot(k.xy,p),0.0)*k.xy;
  p -= vec2(clamp(p.x, -k.z*r, k.z*r), r);
  return length(p) * sign(p.y);
}

float hexagram(in vec2 p, in vec2 pos, in float r) {
  const vec4 k=vec4(-0.5,0.8660254038,0.5773502692,1.7320508076);
  p = abs(p - pos);
  p -= 2.0*min(dot(k.xy,p),0.0)*k.xy;
  p -= 2.0*min(dot(k.yx,p),0.0)*k.yx;
  p -= vec2(clamp(p.x,r*k.z,r*k.w),r);
  return length(p)*sign(p.y);
}
  
float distanceField(vec2 p) {
  float hexa = hexagon(p, vec2(0, 0), 1.5);
  float star = hexagram(p, vec2(0, 0), .5);
  float x = (1.0 + sin(time * 0.5)) * .5;
  return mix(hexa, star, x);
}

// by @mattdesl    
float hue2rgb(float f1, float f2, float hue) {
  if (hue < 0.0)
    hue += 1.0;
  else if (hue > 1.0)
    hue -= 1.0;
  float res;
  if ((6..........完整代码请登录后点击上方下载按钮下载查看