canvas实现无尽循环动画效果代码-html代码-BFW代码库

canvas实现无尽循环动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas实现无尽循环动画效果代码

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  >
const dpr = Math.max(1, .5 * window.devicePixelRatio);
const canvas = document.createElement("canvas");

document.body.innerHTML = "";
document.body.appendChild(canvas);
document.body.style = "margin:0;overflow:hidden;";
canvas.style.width = "100%";
canvas.style.height = "auto";
canvas.style.objectFit = "contain";

const vertexSource = `#version 300 es
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif

in vec4 position;

void main(void) {
    gl_Position = position;
}
`;
const fragmentSource = `#version 300 es
/*********
 * made by Matthias Hurrle (@atzedent) 
 */
precision highp float;
out vec4 O;
uniform vec2 resolution;
uniform float time;
#define R resolution
#define T time
#define TAU 6.312853
#define hue(a) (.6+.6*cos(25.13*(a)+vec3(0,83,21)))

void main(void) {
  vec2 uv = (gl_FragCoord.xy-.5*R)/min(R.x, R.y);
  vec3 col = vec3(0);
  const float steps = 140.;
  float n = steps;

  for (float i = .0; i < steps; i++) {
    float k = i/steps;
    vec2 p = vec2(sin(k*TAU), cos(k*TAU));
    .........完整代码请登录后点击上方下载按钮下载查看