BackGround Website Shader

BackGround Website Shader.md

<background>

    <style>
    background {
    z-index : -9999;
    position: absolute;
    top : 0;
    left    : 0;
    width   : 100%;
    height  : 100%;
    margin  : 0;
    padding : 0;
}
</style>

    <div id="container"></div>
    <script src="js/three.min.js"></script>
    <script id="vertexShader" type="x-shader/x-vertex">
        void main() {
            gl_Position = vec4( position, 1.0 );
        }
    </script>
    <script id="fragmentShader" type="x-shader/x-fragment">
// Author @patriciogv - 2015
// http://patriciogonzalezvivo.com

#ifdef GL_ES
precision mediump float;
#endif

uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;


#define ANIMATE

vec2 hash2( vec2 p )
{
 return fract(sin(vec2(dot(p,vec2(127.1,311.7)),dot(p,vec2(269.5,183.3))))*43758.5453);
}

vec3 voronoi( in vec2 x )
{
    vec2 n = floor(x);
    vec2 f = fract(x);

    //----------------------------------
    // first pass: regular voronoi
    //----------------------------------
	vec2 mg, mr;

    float md = 8.0;
    for( int j=-1; j<=1; j++ )
    for( int i=-1; i<=1; i++ )
    {
        vec2 g = vec2(float(i),float(j));
		vec2 o = hash2( n + g );
		#ifdef ANIMATE
        o = 0.5 + 0.5*sin( u_time + 6.2831*o );
        #endif	
        vec2 r = g + o - f;
        float d = dot(r,r);

        if( d<md )
        {
            md = d;
            mr = r;
            mg = g;
        }
    }

    //----------------------------------
    // second pass: distance to borders
    //----------------------------------
    md = 8.0;
    for( int j=-2; j<=2; j++ )
    for( int i=-2; i<=2; i++ )
    {
        vec2 g = mg + vec2(float(i),float(j));
		vec2 o = hash2( n + g );
		#ifdef ANIMATE
        o = 0.5 + 0.5*sin( u_time + 6.2831*o );
        #endif	
        vec2 r = g + o - f;

        if( dot(mr-r,mr-r)>0.00001 )
        md = min( md, dot( 0.5*(mr+r), normalize(r-mr) ) );
    }

    return vec3( md, mr );
}


void main(){
  vec2 p = gl_FragCoord.xy/u_resolution;


    vec3 c = voronoi( 8.0*p );

	// isolines
    vec3 col = c.x*(0.5 + 0.5*sin(64.0*c.x))*vec3(1.0);
    // borders	
    col = mix( vec3(1.0,0.6,0.0), col, smoothstep( 0.04, 0.07, c.x ) );
    // feature points
	float dd = length( c.yz );
	col = mix( vec3(1.0,0.6,0.1), col, smoothstep( 0.0, 0.12, dd) );
	col += vec3(1.0,0.6,0.1)*(1.0-smoothstep( 0.0, 0.04, dd));

	gl_FragColor = vec4(col,1.0);
}

    </script>
    <script>
        var container;
        var camera, scene, renderer;
        var uniforms;

        init();
        animate();

        function init() {
            container = document.getElementById( 'container' );

            camera = new THREE.Camera();
            camera.position.z = 1;

            scene = new THREE.Scene();

            var geometry = new THREE.PlaneBufferGeometry( 2, 2 );

            uniforms = {
                u_time: { type: "f", value: 1.0 },
                u_resolution: { type: "v2", value: new THREE.Vector2() },
                u_mouse: { type: "v2", value: new THREE.Vector2() }
            };

            var material = new THREE.ShaderMaterial( {
                uniforms: uniforms,
                vertexShader: document.getElementById( 'vertexShader' ).textContent,
                fragmentShader: document.getElementById( 'fragmentShader' ).textContent
            } );

            var mesh = new THREE.Mesh( geometry, material );
            scene.add( mesh );
            

            renderer = new THREE.WebGLRenderer();
            renderer.setPixelRatio( window.devicePixelRatio );

            container.appendChild( renderer.domElement );

            onWindowResize();
            window.addEventListener( 'resize', onWindowResize, false );

            document.onmousemove = function(e){
              uniforms.u_mouse.value.x = e.pageX
              uniforms.u_mouse.value.y = e.pageY
            }
        }

        function onWindowResize( event ) {
            renderer.setSize( window.innerWidth, window.innerHeight );
            uniforms.u_resolution.value.x = renderer.domElement.width;
            uniforms.u_resolution.value.y = renderer.domElement.height;
        }

        function animate() {
            requestAnimationFrame( animate );
            render();
        }

        function render() {
            uniforms.u_time.value += 0.05;
            renderer.render( scene, camera );
        }
        
        
    </script>
    


</background>