canvas实现webgl三维玻璃材质方块变形动画效果代码-html代码-BFW代码库

canvas实现webgl三维玻璃材质方块变形动画效果代码

代码语言：html

所属分类：三维

代码描述：canvas实现webgl三维玻璃材质方块变形动画效果代码

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">
  

  
  
  
<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(1, .5 * 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

out vec4 fragColor;

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

#define mouse (touch.xy / resolution.xy)

#define T .1*mod(time, 200.)
#define S smoothstep

mat3 rotX(float a) {
    float s = sin(a), c = cos(a);

    return mat3(
        vec3(1, 0, 0),
        vec3(0, c,-s),
        vec3(0, s, c)
    );
}

mat3 rotY(float a) {
    float s = sin(a), c = cos(a);

    return mat3(
        vec3(c, 0, s),
        vec3(0, 1, 0),
        vec3(-s,0, c)
    );
}

mat3 rotZ(float a) {
    float s = sin(a), c = cos(a);

    return mat3(
        vec3(c, -s, 0),
        vec3(s,  c, 0),
        vec3(0,  0, 1)
    );
}

float box(vec3 p, vec3 s) {
    p = abs(p)-s;

    return max(max(p.x, p.y), p.z);
}

float rnd(float t) {
	return fract(sin(t*427.771)*232.522);
}

float curve(float t, float d) {
	t /= d;
	return mix(rnd(floor(t)), rnd(floor(t)+1.),
		pow(S(.0, 1.,fract(t)), 10.));
}

float map(vec3 p) {
    for(float i = .0; i < 3.; i++) {
		p -= vec3(.5,5.2,1.2)*.2*i;
        p *= rotX(T+i/100.);
        p *= rotY(-T-i);
        p = abs(p);
    }
    p.xz += .25+.25*sin(T);
    for(float i = .0; i < 2.; i++) {
        p *= rotZ(curve(T*9., .4));
    }
    float box = box(p, vec3(1));

    return box;
}

vec3 norm(vec3 p) {
    vec2 e = vec2(1e-1, 0);
    float d = map(p);
    vec3 n = d - vec3(
        map(p-e.xyy),
        map(p-e.yxy),
        map(p-e.yyx)
    );

    return normalize(n);
}

vec3 dir(vec2 uv, vec3 ro, vec3 target, float zoom) {
    vec3 up = vec3(0,1,0),
    f = normalize(target-ro),
    r = normalize(cross(up, f)),
    u = cross(f, r),
    c = f * zoom,
    i = c+uv.x*r+uv.y*u,
    d = normalize(i);

    return d;
}

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

    vec3 col = vec3(0),
    ro = vec3(0, 0, -9);

    ro *= rotX(-mouse.y * acos(-1.)+1.);
    ro *= rotY(mouse.x*acos(-1.)*2.);

    vec3 rd = dir(uv, ro, vec3(0), 1.),
    p = ro;
    float i = .0, side = 1., prod = 1.0;
    for(; i<120.;i++) {
        float d = map(p)*.5*side;

        if(d < 1e-3) {
            vec3 n = norm(p)*side,
            r = normalize(rd),
            l = normalize(ro-vec3(1));

            if (dot(l,n)<.0) l = -l;

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