canvas+webgl实现神秘立方体旋转扩散动画效果代码-html代码-BFW代码库

canvas+webgl实现神秘立方体旋转扩散动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas+webgl实现神秘立方体旋转扩散动画效果代码

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 translate="no">
  
  
      <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)
*/
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
out vec4 O;
uniform vec2 resolution;
uniform float time;
uniform int pointerCount;
uniform vec2 touch;
#define mouse (touch/R)
#define P pointerCount
#define FC gl_FragCoord.xy
#define R resolution
#define T time
#define S smoothstep
#define N normalize
#define rot(a) mat2(cos(a-vec4(0,11,33,0)))
float vmax(vec3 v) { return max(max(v.x, v.y), v.z); }
float box(vec3 p, vec3 s) {
  vec3 d = abs(p)-s;
  return length(max(d,.0))+vmax(min(d,.0));
}
float mat = .0;
float map(vec3 p) {
	float d=5e5,
	room = -(length(p)-10.);
	d = min(d, box(p,vec3(1))-.025);
	d = min(d, room);
	if (d < room) mat = 1.;
	else mat = .0;
	return d;
}
vec3 norm(vec3 p) {
  float h=1e-3;
  vec2 k=vec2(-1,1);
  return N(
    k.xyy*map(p+k.xyy*h)+
    k.yxy*map(p+k.yxy*h)+
    k.yyx*map(p+k.yyx*h)+
    k.xxx*map(p+k.xxx*h)
  );
}
void cam(inout vec3 p) {
  if (P>0) {
    p.yz*=rot(-mouse.y*6.3+3.14);
    p.xz*=rot(3.14-mouse.x*6.3);
  } else {
    float t = T*.2;
    p.yz *= rot(-t*.5);
    p.xz *= rot(t);
  }
}
float rnd(vec2 p) { return fract(sin(dot(p,vec2(12.9898,78.233)))*345678.); }
float noise(vec2 p ) { vec2 i=floor(p),f=fract(p),u=S(.0,1.,f),s=vec2(1,0); float a=rnd(i),b=rnd(i+s),c=rnd(i+s.yx),d=rnd(i+1.); return mix(mix(a,b,u.x),mix(c,d,u.x),u.y); }
float fbm(vec2 p) { 
	float t=.0, a=1.;
	for (int i=0; i<5; i++) {
		t+=a*noise(p);
		p*=2.;
		a*=.5;
	}
	return t;
}
vec3 palette(float t) { vec3 a=vec3(.2),b=vec3(.4),c=vec3(1),d=vec3(.12,.14,.16); return a+b*cos(6.3*(c*t+d)); }
vec3 pattern(vec2 uv) { 
	vec2 p=uv;
	vec3 col=vec3(0);
	float d=1.;
	for (float i=.0; i<3.; i++) {
		uv*=2.;
		d=fbm(uv*d);
		col+=palette(d+length(p)-T)*.5;
	}
	return col;
}
vec3 bg(vec3 p) {
  return mix(vec3(.5,.7,.9),vec3(.9,.7,.5),p.y*.5+.5);
}
void main() {
  vec2 uv = (FC-.5*R)/min(R.x,R.y);
  vec.........完整代码请登录后点击上方下载按钮下载查看