StevieGeorge.github.io/fabric.html at main · StevieGeorge/StevieGeorge.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Shader Art</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">


</head>
<body>
<div>
 Fabric<br/>
Written live for Jam in Lyon.
<br/><br/>
More shaders:<br/>
<a href ="./index.html">[home]</a>
  </div>
</body>
<script>
// -- https://xemantic.github.io/shader-web-background/

const shaderWebBackground={};
(()=>{'use strict';
const t=(a,b)=>{
	b.initHalfFloatRGBATexture(b.width,b.height);
	a.texParameteri(a.TEXTURE_2D,
	a.TEXTURE_MIN_FILTER,a.LINEAR);
	a.texParameteri(a.TEXTURE_2D,a.TEXTURE_MAG_FILTER, a.LINEAR);
	a.texParameteri(a.TEXTURE_2D,a.TEXTURE_WRAP_S,a.CLAMP_TO_EDGE);
	a.texParameteri(a.TEXTURE_2D, a.TEXTURE_WRAP_T,a.CLAMP_TO_EDGE)
	},
	x=(a,b)=>{
		console.warn("shader-web-background cannot shade, adding fallback CSS classes");
		document.documentElement.classList.add("shader-web-background-fallback");
		b.classList.add("shader-web-background-fallback");
		if(a instanceof shaderWebBackground.GlError)console.warn("Not sufficient WebGL support:", a);
		else throw a;
		};
	function y(a,b){
		if(!a)throw new shaderWebBackground.ConfigError(b);
	}
	function z(a){y(a instanceof HTMLCanvasElement,"config.canvas must be instance of canvas");
	return a}
	function A(){
		const a=document.createElement("canvas"),b=a.style;
		a.id="shader-web-background";
		b.width="100vw";
		b.height="100vh";
		b.position="fixed";
		b.top="0";
		b.left="0";
		b.zIndex=-9999;
		return a
	}
	function B(a,b,c){
		y(a instanceof HTMLScriptElement&&a.type===b,'Shader source element of id "'+ c+'" should be of type: <script type="'+(b+'" id="'+c+'">'))
	}
	function D(a){
		const b=document.getElementById(a);
		y(b,'Missing shader source: <script type="x-shader/x-fragment" id="'+ (a+'">'));
		B(b,"x-shader/x-fragment",a);
		return b.text
	}
	function E(a){
		a+="Vertex";
const b=document.getElementById(a);
return b?(B(b,"x-shader/x-vertex",a),b.text):"attribute vec2 V;void main(){gl_Position=vec4(V,0,1);}"
}
function F(a,b){
"loading"!==document.readyState?b():window.addEventListener(a,b)
}
class G{constructor(a,b,c,d){
	this.g=c;
	const l=a.gl;
	this.h=()=>{for(const f of d)f.u(l, f.location,b)};
		this.i=()=>{
			var f=c.v,h=a.gl;
			h.bindBuffer(h.ARRAY_BUFFER,a.j);
			h.enableVertexAttribArray(f);
			h.vertexAttribPointer(f,2,h.FLOAT,!1,0,0);h.drawArrays(h.TRIANGLE_STRIP,0,4);h.disableVertexAttribArray(f);
			h.bindBuffer(h.ARRAY_BUFFER,null);
			f=a.gl;
			for(h=0;h<a.g;h++)f.activeTexture(f.TEXTURE0+h),f.bindTexture(f.TEXTURE_2D,null);a.g=0
		}
	}
}
function H(a){
	var b={antialias:!1,depth:!1,alpha:!1};
	try{return new I(a,b)}
	catch(c){throw new shaderWebBackground.GlError(c.message);}
}
function J(a,b,c,d,l,f){
	function h(e,m,n){
		try{{
			var k=p;const q=k.gl,P=K(k,e,q.VERTEX_SHADER,m),Q=K(k,e,q.FRAGMENT_SHADER,n),v=q.createProgram();q.attachShader(v,P);q.attachShader(v,Q);q.linkProgram(v);var r=v
			} return r }
		catch(q){throw new shaderWebBackground.ConfigError(q.message);}
	}
	const p=H(a),w=[],g={
		gl:p.gl,
		canvas:a,
		width:0,
		height:0,
		cssPixelRatio:0,
		cssWidth:0,
		cssHeight:0,
		isOverShader:(e,m)=>{
			const n=a.getBoundingClientRect();
			return e>=n.left&&e<=n.right&&m>=n.top&&m<=n.bottom
			},
		toShaderX:e=>(e-a.getBoundingClientRect().left)*g.cssPixelRatio+.5,
		toShaderY:e=>a.height-(e-a.getBoundingClientRect().top)*g.cssPixelRatio-.5,
		s:()=>g.cssWidth!==a.clientWidth||g.cssHeight!==a.clientHeight?(g.resize(),!0):!1,
		resize:()=>{
			const e=window.devicePixelRatio||1,m=a.clientWidth,n=a.clientHeight,k=Math.floor(m*e),r=Math.floor(n*e);
			a.width=k;
			a.height=r;
			g.width=k;
			g.height=r;
			g.cssPixelRatio=e;
			g.cssWidth=m;
			g.cssHeight=n;
			p.gl.viewport(0,0,p.canvas.width,p.canvas.height);
			for(const q of w)q.g.l(k,r)
		},
		texture:(e,m)=>{
			{
				var n=p;
				const k=n.gl;
				m=m instanceof L?m.g:m;
				k.activeTexture(k.TEXTURE0+n.g);
				k.bindTexture(k.TEXTURE_2D,m);
				k.uniform1i(e,n.g++)
			}
		},
		buffers:{

		},
		initHalfFloatRGBATexture:(e,m)=>{ p.h.g(e,m) }
	},
	R=Object.keys(b).length-1;
	let S=0;
	for(const e in b){
		if(S++<R){
			const k=b[e].texture||t;
			g.buffers[e]=M(
				p,()=>{
					k(p.gl,g)
					}
				)
		}
		const m=N(p,h(e,E(e),D(e)),g.buffers[e]),n=b[e].uniforms||{  };
		var u=Object.keys(n);
		for(const k of m.m)y(n[k.name],'No configuration for uniform "'+k.name+'" defined in shader "'+e+'"'),u=u.filter(r=>r!==k.name);
		0!==u.length&&console.warn('Extra uniforms configured for shader "'+e+'", which are not present in the shader code - might have been removed by GLSL compiler if not used: '+u.join(", "));
		u=m.m.map(k=>({
			location:k.location,u:n[k.name]
		}));
		w.push(new G(p,g,m,u))
	}const C=()=>{
		g.s()&&d&&d(g.width,g.height,g);
		l&&l(g);
		for(const e of w)e.g.i(e.h,e.i);
		f&&f(g);
		requestAnimationFrame(C)
	};
	F("load",()=>{
		g.resize();
		c&&c(g);
		d&&d(g.width,g.height,g);
		requestAnimationFrame(C)
	});
return g
}
shaderWebBackground.Error=class extends Error{
	constructor(a){
		super(a);
		this.name="shaderWebBackground.Error"
	}
};
shaderWebBackground.ConfigError=class extends shaderWebBackground.Error{
	constructor(a){
		super(a);
		this.name="shaderWebBackground.ConfigError"
	}
};
shaderWebBackground.GlError=class extends shaderWebBackground.Error{
	constructor(a){
		super(a);
		this.name="shaderWebBackground.GlError"
	}
};
shaderWebBackground.shade=function(a){
	y(a,"Missing config argument");
	const b=a.canvas?z(a.canvas):A();
	y(a.shaders,"No shaders specified in config");
	try{
		const c=J(b,a.shaders,a.onInit,a.onResize,a.onBeforeFrame,a.onAfterFrame);
		a.canvas||F("DOMContentLoaded",()=>{
			document.body.appendChild(b)
		});
		return c
	}catch(c){
		(a.onError||x)(c,b)
	}
};
const O=[-1,1,1,1,-1,-1,1,-1];
function T(a,b){
	return a.j(a.gl.getExtension(b),b+" extension is not supported")
}
class U{
	constructor(a,b){
	this.gl=a;
	this.j=b
	}g(){

	}
}
class V extends U{
	constructor(a,b){
		super(a,b);
		this.h=T(this,"OES_texture_half_float");
		T(this,"OES_texture_half_float_linear")
	}
	g(a,b){
		const c=this.gl;
		c.texImage2D(c.TEXTURE_2D,0,c.RGBA,a,b,0,c.RGBA,this.h.HALF_FLOAT_OES,null)
	}
}
class W extends U{
	constructor(a,b){
		super(a,b);
		T(this,"EXT_color_buffer_float");
		this.gl.getExtension("OES_texture_float_linear")
	}g(a,b){
		const c=this.gl;
		c.texImage2D(c.TEXTURE_2D,0,c.RGBA16F,a,b,0,c.RGBA,c.HALF_FLOAT,null)
	}
}
function X(a){
	a=a.split(/\r?\n/);
	const b=a.length.toString().length;
	var c=[];
	a.forEach((d,l)=>{
		l=(l+1).toString();
		l=l.length>=b?l:" ".repeat(b-l.length)+l;
		c.push(l+": "+d+"\n")
	});
	return c.join("")
}
function M(a,b){
	return new L(   a.gl,()=>{  b(a.gl)  }   )
}
function N(a,b,c){
	const d=a.gl;
	a=[];
	const l=d.getProgramParameter(b,d.ACTIVE_UNIFORMS);
	for(let f=0;
	f<l;
	f++){
		const h=d.getActiveUniform(b,f);
		a.push({
			name:h.name,location:d.getUniformLocation(b,h.name)
		})
	}
	return{
		v:d.getAttribLocation(b,"V"),m:a,l:c?(f,h)=>c.l(f,h):()=>{

		},i:(f,h)=>{
			d.useProgram(b);
		f();
		c?(f=c.g,c.g=c.h,c.h=f,c.i(h)):h()
		}
	}
}
function K(a,b,c,d){
	a=a.gl;
	c=a.createShader(c);
	a.shaderSource(c,d);
	a.compileShader(c);
	if(!a.getShaderParameter(c,a.COMPILE_STATUS)){
		const l=String(a.getShaderInfoLog(c));
		a.deleteShader(c);
		b="Cannot compile shader - "+b+": "+l;
		console.log(b);
		console.log(X(d));
		throw Error(b);
	}
	return c
}
class I{
	constructor(a,b){
	this.canvas=a;
	const c=(l,f)=>{
		if(!l)throw Error(f);
		return l
	};
	let d=a.getContext("webgl2",b);
	if(d)this.h=new W(d,c);
	else if(d=a.getContext("webgl",b))this.h=new V(d,c);
	c(d,"webgl context not supported on supplied canvas element: "+a);
	this.gl=d;
	a=d.createBuffer();
	d.bindBuffer(d.ARRAY_BUFFER,a);
	d.bufferData(d.ARRAY_BUFFER,new Float32Array(O),d.STATIC_DRAW);
	d.bindBuffer(d.ARRAY_BUFFER,null);
	this.j=a;
	this.buffers={ };
	this.g=0
	}
}
function Y(a){
	const b=a.gl,c=b.createTexture();
	b.bindTexture(b.TEXTURE_2D,c);
	a.o(b);
	b.bindTexture(b.TEXTURE_2D,null);
	return c
}
class L{
	constructor(a,b){
		this.j=a.createFramebuffer();
		this.gl=a;
		this.o=b;
		this.g=this.h=null
	}
	l(){
		this.h&&this.gl.deleteTexture(this.h);
		this.g&&this.gl.deleteTexture(this.g);
		this.h=Y(this);
		this.g=Y(this)
	}
	i(a){
		const b=this.gl;
		b.bindFramebuffer(b.FRAMEBUFFER,this.j);
		b.framebufferTexture2D(b.FRAMEBUFFER,b.COLOR_ATTACHMENT0,b.TEXTURE_2D,this.g,0);
		a();
		b.framebufferTexture2D(b.FRAMEBUFFER,b.COLOR_ATTACHMENT0,b.TEXTURE_2D,null,0);
		b.bindFramebuffer(b.FRAMEBUFFER,null)
	}
};

})()
//# sourceMappingURL=dist/shader-web-background.min.js.map
  </script>

  <script type="x-shader/x-fragment" id="image">

precision mediump float;
uniform float time;
float fade;
float fadeTo;
uniform vec2 mouse;
uniform vec2 resolution;
#define PI 3.1415926538

vec4 lerp(vec4 vecA, vec4 vecB, float lp)
{
  return (vecA * (1.0 - lp)) + vecB * lp;

}

float cosy(float inp, float offset)
{
  return (cos(inp * PI) + 1.0) * -0.5;
}

/*
float cosT(float inp, float rate, float offset)
{
  return cosy((time + offset) * rate);
}
*/


void main(void) {

  // fadeTo = 1.0;
   // fade -= (fade - fadeTo) * 0.1;
  float inp = PI;
  float offset = cos((time) * 0.06);
  float rate = 0.5;
  float cosy = (cos(inp * PI) + 1.0) * -0.5;
  float cosT =  cos((time + offset) * rate);
  float cosT2 =  cos((time + offset) * 0.21);
  vec2 position = (gl_FragCoord.xy / resolution.xy);
  vec2 cpos = position - vec2(0.5, 0.5);
  vec2 swirlpos = cpos + vec2(sin(time * 0.352) * 0.3,  cos(time * 0.253) * 0.3 );

  float color = 0.0;
  float cosPosY =  swirlpos.x * 0.2 + (swirlpos.x * 0.6 * (cos((time + offset) * 10.0)));
  float cosPosX =   swirlpos.x * 0.2 + (swirlpos.x * 0.6 * (cos((time + offset) * 0.11)));
  /*
  color += sin(swirlpos.x * cos(time / 2.0) * 20.0) + cos(swirlpos.y * cos(time / 15.0) * 10.0);
  color += sin(cosPosY * sin( time / 10.0) * 40.0) + cos(swirlpos.x * sin(time / 25.0) * 10.0);
  color += sin(cosPosX * sin( time / 5.0) * 10.0) + sin(swirlpos.y * sin(time / 35.0) * 80.0);
  color *= sin(time / 10.0) * 0.5;
*/

  //color = cosf(time) * 1.0;
  //pass2
  float gridResX = 10.0 + cosT * 500.0;
  float gridResY = 10.0 + cosT * 350.0;

   float colorGrid = 1.0;
   float colorBg = 0.0;
   float colh = floor(sin((cosT * (-gridResY * 0.5)) + ((position.y * gridResY)) * colorGrid * 1.2));
   float colv = floor(sin((cosT * (-gridResX * 0.5)) + ((position.x * gridResX)) * colorGrid * 1.2));
   float col2 = colv + colh;
  //


//flashing limiter
float flashCycle = (cos((time + offset) * (3.0001 + cosy)) * 2.000001) + 2.0;
float flash = floor(abs(flashCycle));
float fadeFlash = 1.0;
vec4 colFlash = vec4(cosT, floor(cosT2 * 1.4), ceil(cos(time * 0.13)), 1.0) * cosT2 * 0.75;

//
fade = 0.2 + (cosT * 0.6);
vec4 pass1 =  vec4(vec3(cosy, color * 0.5, sin(color + time / 3.0) * 0.25), 1.0);
vec4 pass2 = vec4(col2, col2, col2, 1.0);
vec4 pass2b = vec4(0.0, 0.15, 0.05, 0.0);
//fade = fadFlash;
vec4 blend = (pass1 * (1.0 - fade)) + ( pass2 * fade);
float blendy = floor(fadeFlash + cos(time * 1.05) + 0.99);
vec4 blend2 = (colFlash * (1.0 - fadeFlash)) + ( blend * fadeFlash);
  // gl_FragColor = vec4(vec3(cosy, color * 0.5, sin(color + time / 3.0) * 0.25), 1.0);
vec4 blend3 = vec4(blend2.x * ceil(sin(time + 0.0) * 0.2), blend2.y * ceil(sin(time + (PI * 0.667)) * 0.2),  blend2.z * ceil(sin(time + (PI * 1.333)) * 0.2), 1.0);
  gl_FragColor = blend3;

}


  </script>


<script>
    shaderWebBackground.shade({
      shaders: {
        image: {
          uniforms: {
            time: (gl, loc) => gl.uniform1f(loc, performance.now() / 1000),
			resolution: (gl, loc) => {
				const canvas = gl.canvas; // Assuming the canvas element
				gl.uniform2f(loc, canvas.width, canvas.height);
			}

          }
        }
      }
    });
  </script>
  <style>
    .shader-web-background-fallback {
      background-position: center;
      background-size: cover;
      background-attachment: fixed;
    }
    div {
	position:relative;
      height:20%;
      width:20%;
      background-color: black;
          text-align: center;
      border: 3px solid white;
      padding: 20px;
      margin: auto; /* Centers it horizontally */
      opacity: 0.8;
	  position: fixed;
	  top: 50%;
	  left: 50%;
	  transform: translate(-50%, -50%);
}
    header {
      height: 100vh;
    }
    html {
      box-sizing: border-box;
      background: black;
      font-size: 1.7vmin;
      font-family: sans-serif;
      scroll-behavior: smooth;
      line-height: 2em;
    }
    *, *:before, *:after {
      box-sizing: inherit;
    }
    body, h1, h2, p, ul, blockquote {
      color: white;
      overflow-x: hidden;
      overflow-y: hidden;
      text-align: center;
      margin: 0;
      padding: 0;
    }
    p, ul {
      margin-top: .618rem;
      margin-bottom: .618rem;
    }
  </style>
</html>