canvas+webgl实现三维彩色点围成圆形扩散动画效果代码-html代码-BFW代码库

canvas+webgl实现三维彩色点围成圆形扩散动画效果代码

代码语言：html

所属分类：三维

代码描述：canvas+webgl实现三维彩色点围成圆形扩散动画效果代码

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>
  
  
      <script >
const canvas = document.createElement("canvas");
const gl = canvas.getContext("webgl2");

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";

const dpr = Math.max(1, .5 * window.devicePixelRatio);

function resize() {
  const {
    innerWidth: width,
    innerHeight: height } =
  window;

  canvas.width = width * dpr;
  canvas.height = height * dpr;

  gl.viewport(0, 0, width * dpr, height * dpr);
}
window.onresize = resize;

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) 
     * 
     * Adaptation of "Quasar" by @kishimisu 
     * Source: https://www.shadertoy.com/view/msGyzc
     */
    #ifdef GL_FRAGMENT_PRECISION_HIGH
    precision highp float;
    #else
    precision mediump float;
    #endif

    out vec4 fragColor;

    uniform vec2 resolution;
    uniform float time;
    uniform vec2 touch;
    uniform int pointerCount;

    #define mouse (touch/resolution)
    #define P pointerCount
    #define T (10.+time*.5)
    #define S smoothstep

    #define hue(a) (.6+.6*cos(6.3*(a)+vec3(0,23,21)))

    mat2 rot(float a) {
        float c = cos(a), s = sin(a);

        return mat2(c, -s, s, c);
    }

    float orbit(vec2 p, float s) {
        return floor(atan(p.x, p.y)*s+.5)/s;
    }

    void cam(inout vec3 p) {
        if (P > 0) {
            p.yz *= rot(mouse.y*acos(-1.)+acos(.0));
            p.xz *= rot(-mouse.x*acos(-1.)*2.);
        }
    }

    void main(void) {
        vec2 uv = (
            gl_FragCoord.xy-.5*resolution
        )/min(resolution.x, resolution.y);

        vec3 col = vec3(0), p = vec3(0),
        rd = normalize(vec3(uv, 1));

        cam(p);
        cam(rd);

        const float steps = 30.;
        float dd = .0;

        for (float i=.0; i<steps; i++) {
            p.z  -= 4.;
            p.xz *= rot(T*.2);
            p.yz *= rot(sin(T*.2)*.5); 
            p.zx *= rot(orbit(p.zx, 12.));

            float a = p.x;

            p.yx *= rot(orbit(p.yx, 2.));

            float b = p.x-T;

            p.x = fract(b-.5)-.5;

            flo.........完整代码请登录后点击上方下载按钮下载查看