canvas实现webgl深海海底三维生物效果代码-html代码-BFW代码库

canvas实现webgl深海海底三维生物效果代码

代码语言：html

所属分类：三维

代码描述：canvas实现webgl深海海底三维生物效果代码

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">

  
  
<style>
* {
    box-sizing: border-box;
  }
  
  html, body {
    margin: 0;
    min-height: 100vh;
    overflow: hidden;
    
    background:
    repeating-radial-gradient(
    circle at center,
      #444 0 10%,
      #111 10% 20%
    );
    
    touch-action: none;
  }
  
  canvas {
    width: 100%;
    height: auto;
    object-fit: contain;
  }
</style>




</head>

<body>
  <canvas id="canvas"></canvas>

  
      <script >
/*********
 * made by Matthias Hurrle (@atzedent)
 */

/** @type {HTMLCanvasElement} */
const canvas = window.canvas;
const gl = canvas.getContext("webgl2");
const dpr = Math.max(.5, .25 * window.devicePixelRatio);
/** @type {Map<string,PointerEvent>} */
const touches = new Map();

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

in vec2 position;

void main(void) {
    gl_Position = vec4(position, 0., 1.);
}
`;
const fragmentSource = `#version 300 es
/*********
* made by Matthias Hurrle (@atzedent)
*/

#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif

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

out vec4 fragColor;

#define PI 3.14159
#define TAU 6.28318
#define THETA 1.57079
#define T (17.+time)
#define mouse (touch/resolution)
#define hue(a) (.25+.4*cos((a)*11.3+vec3(0,83,21)))
#define rot(a) mat2(cos(a),-sin(a),sin(a),cos(a))

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

    vec3 col = vec3(0),
    lp=vec3(9,5,2),
    rp=vec3(9,6,7),
    ro=vec3(.7,.9,3),
    rd=normalize(vec3(uv, 1)),
    ax=normalize(vec3(8,-3,-5)),
    p;
    
    float g=.0, angle=sin(T*.1)*PI;
    
    if(pointerCount>0) {
        ax=normalize(vec3(1,-5,5));
        ax.xz*=rot(mouse.x*TAU);
        angle=mouse.y*PI;
    } else {
        ax.xz*=rot(T*.05);
    }
    
    for(float i=1.; i<40.; i++) {
        p=g*rd-ro;
        p=mix(
            dot(p,ax)*ax,
            p,
            cos(angle)
        )*THETA-cross(p,ax);
        float d=1., e=.0;

        for(float j=.0; j<16.; j++) {
            p=lp-abs(p-rp);
            e=9./clamp(dot(p,p), .0, 16.);
            d*=e*1.01;
            p=abs(p)*e;
        }

        e=p.y/d;
        e+=+3e-4;
        g+=e*.5;

        col+=mix(
            vec3(1),
            hue(-log(d)*.25),
            .75
        )/e*5e-5;
    }
    
    col = 1. - exp(-col * 1.8);
    col = pow(col, vec3(1.45));
    vec2 z = (gl_FragCoord.xy -.5 * resolution.xy) / mn;
    col *= 1.-dot(z, z);

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