webgl+canvas实现三维小宇宙眼球拖拽旋转效果代码-html代码-BFW代码库

webgl+canvas实现三维小宇宙眼球拖拽旋转效果代码

代码语言：html

所属分类：三维

代码描述：webgl+canvas实现三维小宇宙眼球拖拽旋转效果代码

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 = 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
    #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 time
    #define S smoothstep

    #define syl(p,s) (length(p)-s)

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

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

    float disc(vec3 p, vec2 s, float r) {
        vec2 e = vec2(length(abs(p.xz)), abs(p.y)) - s;

        return length(max(e, .0)) +
            min(.0, max(e.x, e.y)) - r;
    }

    vec2 map(vec3 p) {
        vec2 a = vec2(-disc(p-vec3(0,49,0), vec2(50), 5.), 0),
        b = vec2(syl(p, 1.), 1);

        a = a.x < b.x ? a : b;

        return a;
    }

    vec3 tunnel(vec2 uv, float t) {
        float tt = t;
        vec2 p = uv;

        t = t*.25-cos(t*.5)*1.5;
        p *= rot(t);

        vec3 col = vec3(0);
        const vec3 tint = vec3(2,2.5,3);

        p = normalize(p)*log(length(p)*.8);
        p = vec2(atan(p.y, p.x), length(p)*.5.........完整代码请登录后点击上方下载按钮下载查看