blitzkopf.github.io/index.html at master · blitzkopf/blitzkopf.github.io · GitHub

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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta property="og:title" content="Bunga Bunga"/>
<meta property="og:description" content="3D animation of earthquakes in Iceland area"/>
<meta property="og:image" content="http://blitzkopf.github.io/bunga.png"/>
<title>Bunga Bunga</title>
<style type="text/css">

#bunga-bunga-canvas{
	background-color:#000;
	z-index:-1;
	position: fixed;
	margin: 0
}
#texture{
	display: none;
}
#timer{
	//background-color:#000;
	color:#fff;
	z-index:0;
	position: relative;
	width:500px;
	height:30px;
	margin: 0;
}
#controls{
	color: #aaa;
	position: absolute;
	top:1px;
	right: 0px;
	margin: 0;
	width: 310px;
	//visibility: hidden;
	display: none;
}
input.disp{
	color:#777;
	background-color:none;
	width:4em;
	//opacity: 0.5;
}
body{
	margin: 0
}
a:link{
	color:#fff;
}

a:visited{
	color:#fff;
}
</style>

<script>
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

  ga('create', 'UA-54107862-1', 'auto');
  ga('require', 'displayfeatures');
  ga('send', 'pageview');

</script>
<script type="text/javascript" src="glMatrix-0.9.5.min.js"></script>
<script type="text/javascript" src="webgl-utils.js"></script>
<script type="text/javascript" src="jquery-2.1.1.js"></script>
<script type="text/javascript" src="quake.js"></script>


<script id="shader-fs" type="x-shader/x-fragment">
    precision mediump float;

    varying vec4 vColor;
	varying vec3 vLightWeighting;
    varying vec2 vTextureCoord;
    uniform float uAlpha;
    uniform sampler2D uSampler;

    void main(void) {
		vec4 textureColor = texture2D(uSampler, vTextureCoord);
		gl_FragColor = vec4(vColor.rgb*textureColor.rgb*vLightWeighting,vColor.a);
    }
</script>

<script id="shader-vs" type="x-shader/x-vertex">
    attribute vec3 aVertexPosition;
	attribute vec3 aVertexNormal;
    attribute vec4 aVertexColor;
    attribute vec2 aTextureCoord;

	uniform vec4 uVertexColor;

    uniform mat4 uMVMatrix;
    uniform mat4 uPMatrix;
    uniform mat3 uNMatrix;

	uniform vec3 uAmbientColor;

	uniform vec3 uLightingDirection;
	uniform vec3 uDirectionalColor;

	uniform bool uUseLighting;

    varying vec4 vColor;
	varying vec2 vTextureCoord;
	varying vec3 vLightWeighting;

    void main(void) {
        gl_Position = uPMatrix * uMVMatrix * vec4(aVertexPosition, 1.0);
		vTextureCoord = aTextureCoord;
		vColor = uVertexColor;
		if (!uUseLighting) {
		  vLightWeighting = vec3(1.0, 1.0, 1.0);
		} else {
		  //vec3 transformedNormal = uNMatrix * aVertexPosition;
		  vec3 transformedNormal = uNMatrix * aVertexNormal;
		  float directionalLightWeighting = max(dot(transformedNormal, uLightingDirection), 0.0);
		  vLightWeighting = uAmbientColor + uDirectionalColor * directionalLightWeighting;
		}

    }
</script>
<script type="text/javascript" src="webgl-setup.js" ></script>


<script type="text/javascript">

	var timeNow;
	var timeLast;
	var timeDelta;

	var qParams;

	//earthRadius = 6731.0;

	var animParams = {
		depthScale: 4.0,
		animLength: 120, // seconds
		finalSceneLength: 30, //seconds
		minQuakeSize: 0 ,//
		sizeMultiplier: .2, //
		mapdepth: -10, // km
		flybyRadius: 100, // degrees
		flybyHeight: -1, //
		lookAtDepth: 5,
		rotationSpeed: -0.5,
		dispVerifiedOnly: false,
		greenGiant: false,
 	}
	var animTime;

	function mapSize(q,time) {
		var hours = (time - q.time ) / ( 1000*60*60);
		if(time >= qParams.lastTime) {
			hours = 4;
		}
		if (q.size >= 3) {

			return animParams.sizeMultiplier*q.size  / Math.min(0.2+hours,1);
		}
		return animParams.sizeMultiplier*q.size / Math.min(0.5+hours,1);
	}

	function mapColor(q,time) {
		var hours = (time - q.time ) / ( 1000*60*60);
		if (q.size >= 3 && animParams.greenGiant ) {
			return [0.0, 1.0, 0.0 ,1.0 ];
		}
		if ( hours <= 4.0 ) {
			return [ 1.0, 0.0, 0.0, 1.0]; // "#f00";
		} else if(hours <= 12) {
			return [ 1.0, 0.4, 0.0, 1.0]; //"#f60";
		}
		else if(hours <= 24) {
			return [ 1.0, 1.0, 0.0, 1.0]; // "#ff0";
		}
		else if(hours <= 36) {
			return [ 0.2, 0.4, 0.8, 1.0]; // "#36c";
		}
		else if(hours <= 48)
		{
			return [ 0.0, 0.0, 0.4, 1.0]; // "#006";
		} else {
			return [ 0.4, 0.4, 0.4, 0.5];
		}

	}

	function loadCanvas(dataURL,canvas) {
        var canvas = document.getElementById(canvas);
        var context = canvas.getContext('2d');

        // load image from data url
        var imageObj = new Image();
        imageObj.onload = function() {
          context.drawImage(this, 0, 0);
        };

        imageObj.src = dataURL;
    }
    var rIco = 0;
	var szIco = 0;
	var frame=0;
	var quakes = [

		 ];
	var timeStart;
	var flybyAngle = 0;

    function drawScene(time) {
		document.getElementById("timer").innerHTML=time;

/*animParams.mapdepth = document.getElementById("mapdepth").value;
		document.getElementById("mapdepthdisp").value=animParams.mapdepth;

		animParams.sizeMultiplier = document.getElementById("sizeMultiplier").value;
		document.getElementById("sizeMultiplierDisp").value=animParams.sizeMultiplier;

		animParams.minQuakeSize = document.getElementById("minQuakeSize").value;
		document.getElementById("minQuakeDisp").value=animParams.minQuakeSize;

		animParams.flybyRadius = document.getElementById("flybyRadius").value;
		document.getElementById("flybyRadiusDisp").value=animParams.flybyRadius;

		animParams.flybyHeight = document.getElementById("flybyHeight").value;
		document.getElementById("flybyHeightDisp").value=animParams.flybyHeight;

		animParams.rotationSpeed = document.getElementById("rotationSpeed").value;
		document.getElementById("rotationSpeedDisp").value=animParams.rotationSpeed;

*/		animParams.dispVerifiedOnly = document.getElementById("dispVerifiedOnly").checked;
		animParams.greenGiant = document.getElementById("greenGiant").checked;

		gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);

        mat4.perspective(45, gl.viewportWidth / gl.viewportHeight, 0.1, 2000.0, pMatrix);

        mat4.identity(mvMatrix);
        flybyAngle = flybyAngle-(animParams.rotationSpeed * timeDelta/5000.0);
		var lap=qParams.centerOfMass;
		var lapZero=[];
		var lapLength=vec3.length(lap);
		var lapZero = vec3.scale(lap,earthRadius/lapLength,lapZero);
		var lapNormalized=[];

		lapNormalized = vec3.normalize(lap,lapNormalized);
		var p1=[lap[1],-lap[0],lap[2]];
		p1 = vec3.cross(p1,lap);
		var p2=[lap[0],lap[1],lap[2]];
		p2 = vec3.cross(p2,p1);
		p1 = vec3.normalize(p1);
		p2 = vec3.normalize(p2);

		var cosm = -animParams.flybyRadius*Math.cos(flybyAngle);
		var sinm = animParams.flybyRadius*Math.sin(flybyAngle);
		p1=vec3.scale(p1,cosm);
		p2=vec3.scale(p2,sinm);
		lapNormalized = vec3.scale(lapNormalized,animParams.flybyHeight*animParams.depthScale);

		var lfp = vec3.add(p1,vec3.add(p2,vec3.add(lapNormalized,lapZero)));

		//mvMatrix = mat4.lookAt([lfp.x,lfp.y,lfp.z]  ,lap,lap);
		mvMatrix = mat4.lookAt(lfp  ,lap,lap);
		/*lap = {x:0,y:0,z:0};
		lfp = {x:1,y:4,z:5};
		mvMatrix = mat4.lookAt([lfp.x,lfp.y,lfp.z]  ,[lap.x,lap.y,lap.z],[0,1,0]);*/
		setLighting();
		for ( i in quakes) {

			q=quakes[i];
			if(q.time < time && q.size >= animParams.minQuakeSize
				&& ( !animParams.dispVerifiedOnly || q.verified)) {
				drawSphere(q.pos,mapSize(q,time),mapColor(q,time));
			}
		}

		drawEarthWF([0,0,0],earthRadius);
		//drawMap(sphere2Cart(64.701,-17,earthRadius),3,4,5);
			drawMap(-animParams.depthScale*animParams.mapdepth);
	}

    var lastTime = 0;

    function animate() {

        timeNow = new Date().getTime();
        timeDelta = timeNow-timeLast;
		//t1 = ((timeNow - timeStart) % ((animParams.animLength+animParams.finalSceneLength)*1000))/(animParams.animLength*1000);
		t1 = (timeNow - timeStart) / ((animParams.animLength)*1000);
		if( t1 > 1.0) {
			t1 = 1.0;
		}
		//animTime = new Date(firstQuakeTime.getTime() + t1* duration);
		animTime = new Date(qParams.firstTime.getTime() + t1* qParams.duration);


		if(timeNow > timeStart + (animParams.animLength + animParams.finalSceneLength)*1000) {
			 //timeStart = new Date().getTime();
			 loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=72-hoursago",1);
		}
		timeLast=timeNow;

    }


    function tick() {
        requestAnimFrame(tick);
        handleKeys();
    	if(!qParams )
    		return;
        animate();
		drawScene(animTime);
    }

	function rangeChange(inp){
		animParams[inp.id] = inp.value;
		document.getElementById(inp.id+"Disp").value=animParams[inp.id];

	}
	function initRange(field){
		document.getElementById(field).value=animParams[field];
		document.getElementById(field+"Disp").value=animParams[field];
	}

	function initCheck(field){
		document.getElementById(field).checked=animParams[field];
	}

	function stepRange(field,dir){
		var range = document.getElementById(field);
		var val = range.value;
		var step = range.step;
		var min = range.min;
		var max = range.max;
		val = -1*(0-val-dir*step);// funny math to get numbers from strings
		if(val<=max && val>=min) {
			range.value=val;
			rangeChange(range)
		}

	}

	 var currentlyPressedKeys = {};

	function handleKeyDown(event) {
		currentlyPressedKeys[event.keyCode] = new Date().getTime();

		if (String.fromCharCode(event.keyCode) == "F") {
	  		filter += 1;
	  		if (filter == 3) {
	    		filter = 0;
	  		}
		}

	}

	function handleKeyUp(event) {
		delete currentlyPressedKeys[event.keyCode] ;
	}
	function handleKeys() {
		const keyDelay=300;
		var now=new Date().getTime();
    	if (currentlyPressedKeys[33] < now) {
      		// Page Up
      		stepRange('mapdepth',1);
      		currentlyPressedKeys[33]= now+keyDelay;
    	}
    	if (currentlyPressedKeys[34] < now) {
      		// Page Down
     		stepRange('mapdepth',-1);
     		currentlyPressedKeys[34]= now+keyDelay;
    	}
    	if (currentlyPressedKeys[37]< now) {
			// Left cursor key
     		stepRange('rotationSpeed',-1);
     		currentlyPressedKeys[37]= now+keyDelay;
	    }
	    if (currentlyPressedKeys[39]< now) {
	    	// Right cursor key
     		stepRange('rotationSpeed',1);
     		currentlyPressedKeys[39]= now+keyDelay;
	    }
	    if (currentlyPressedKeys[38]< now) {
	      	// Up cursor key
     		stepRange('flybyRadius',-1);
     		currentlyPressedKeys[38]= now+keyDelay;
	    }
	    if (currentlyPressedKeys[40]< now) {
	      	// Down cursor key
     		stepRange('flybyRadius',1);
     		currentlyPressedKeys[40]= now+keyDelay;
	    }

    }


	function loadDataRasmuskr(url,clean) {
		$.getJSON(url,function(resp) {
			if (clean==1)
				quakes=[];
			var lastTime;
			var firstTime;
			for (var i in resp.items) {
				q=resp.items[i];
				quakes.push(new Quake(q.lat,q.long,q.depth,new Date(q.date*1000),q.size,q.verified));
			};
			qParams=calculatePositions(quakes,animParams);
			timeStart = new Date().getTime();
		});


	}
	function loadDataVedurJS(url,clean) {
		$.ajax( {
				dataType:'script',
				url:url,
				success:
					function(resp) {
						if (clean==1)
							quakes=[];
						var lastTime;
						var firstTime;
						for (var i in qs) {
							q=qs[i];
							quakes.push(new Quake(q.lat,q.lon,q.depth,new Date(q.unixtime*1000),q.magnitude,q.verified));
						};
						qParams=calculatePositions(quakes,animParams);
						timeStart = new Date().getTime();
					},
					error: function(a,b,c) {alert("error"+c);}
				}
		);
	}

	function processVedurTab(text,clean) {
		if (clean==1)
			quakes=[];

		var lines = text.split(/(\r\n|\n\r*)\s*/);
		for(var i=1 ; i< lines.length; i++) {
			var data = lines[i].split(/\s+/);
			if(data.length > 2) {
				var year ;//,month,day, hour,min,sec;
				year = data[1].substr(0,4);
				month = data[1].substr(4,2);
				day = data[1].substr(6,2);
				hour = data[2].substr(0,2);
				min = data[2].substr(2,2);
				sec = data[2].substr(4);
				quakes.push(new Quake(data[3],data[4],data[5],new Date(year,month-1,day,hour,min,sec),data[6]));
			}
		}
		qParams=calculatePositions(quakes,animParams);
		timeStart = new Date().getTime();
	};

	function handle_error(a,b,c) {
		alert("error"+a);
	}

	function loadDataVedurTab(url,clean) {
		$.ajax( {
				dataType:'text',
				url:url,
				success:
					function(resp) {
						processVedurTab(resp,clean);
					},
					error: function(a,b,c) {handle_error(a,b,c)}
				}
		);


	}

	function resize_canvas(){
	    var canvas = document.getElementById("bunga-bunga-canvas");
	    var controls = document.getElementById("controls");
	    canvas.width  = window.innerWidth;

        canvas.height = window.innerHeight;
	    gl.viewportWidth = canvas.width;
		gl.viewportHeight = canvas.height;

		controls.style.left=window.innerWidth-320;

	}
	function hide_controls(){
		$("#innerC").toggle(300);
	}

function initGL(canvas) {
    try {
        gl = canvas.getContext("experimental-webgl");
    } catch (e) {
    }
    if (!gl) {
        alert("Could not initialise WebGL, sorry :-(");
    }
}

    function webGLStart() {
		timeLast = new Date().getTime();
        var canvas = document.getElementById("bunga-bunga-canvas");
    	initGL(canvas);
        resize_canvas();
        initShaders();
        $("#controls").show(1000);
		/*$.getJSON("http://apisis.rasmuskr.dk/earthquake/is",function(resp) {
			quakes = resp.results;
			lastQuakeTime = new Date(quakes[0].timestamp);
			firstQuakeTime = new Date(quakes[quakes.length-1].timestamp);
			duration = lastQuakeTime - firstQuakeTime;
			for ( i in quakes ) {
				quakes[i].date=new Date(quakes[i].timestamp);
				quakes[i].pos=sphere2Cart(quakes[i].latitude, quakes[i].longitude, 6731.0 - 2.0*quakes[i].depth);
			}
		});*/
		loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=72-hoursago",1);
       /* loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-19",0);
        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-20",0);
        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-21",0);
		loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-22",0);
        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-23",0);

        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-24",0);
        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-25",0);
		loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-26",0);

        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-27",0);
        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-28",0);
        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-29",0);
        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-30",0);
        loadDataRasmuskr("http://isapi.rasmuskr.dk/api/earthquakes/?date=2014-08-31",0);
*/
		//loadDataVedurJS("qv.js",1)
		//loadDataVedurTab("http://hraun.vedur.is/ja/viku/2014/vika_34/listi",0);

        /*loadDataVedurTab("listi.33",0);
        loadDataVedurTab("listi.34",0);
        loadDataVedurTab("listi.35",0);
        loadDataVedurTab("listi.36",0);*/

        initIcoSphereBuffer(2);
		initCircleBuffer(360);
		initMapBuffer();
		initTexture();
		loadMaps();
		//drawTexture();

        gl.clearColor(0.0, 0.0, 0.0, 1.0);
//       gl.enable(gl.DEPTH_TEST);
			gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
			//gl.blendFunc(gl.SRC_ALPHA, gl.ONE);

            gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
            gl.enable(gl.BLEND);
            gl.enable(gl.DEPTH_TEST);
        initRange("mapdepth");
        initRange("sizeMultiplier");
        initRange("minQuakeSize");
        initRange("flybyRadius");
        initRange("flybyHeight");
        initRange("rotationSpeed");
		initCheck("greenGiant");

        document.onkeydown = handleKeyDown;
    	document.onkeyup = handleKeyUp;
        tick();


    }
    function drawTexture() {
    	var canvas = document.getElementById('texture');
		var ctx = canvas.getContext('2d');

		/*ctx.fillStyle = "#ffff33"; 	// This determines the text colour, it can take a hex value or rgba value (e.g. rgba(255,0,0,0.5))
		ctx.textAlign = "center";	// This determines the alignment of text, e.g. left, center, right
		ctx.textBaseline = "middle";	// This determines the baseline of the text, e.g. top, middle, bottom
		ctx.font = "12px monospace";	// This determines the size of the text and the font family used
		ctx.fillText("Bunga", canvas.width/2, canvas.height/2);*/
		var imageObj = new Image();
          //imageObj.src = 'http://maps.google.com/maps/api/staticmap?sensor=false&center=64.397,-17.0&zoom=8&size=512x512&maptype=terrain&format=png';
          imageObj.src = 'map.png';
          //imageObj.src = 'staticmap.png';

          imageObj.onload = function(){
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            mapTexture = gl.createTexture();
			mapTexture.image = canvas;
			handleLoadedTexture(mapTexture);
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</script>
</head>


<body onload="webGLStart();" onresize="resize_canvas();">
<div id="fb-root"></div>
<script>(function(d, s, id) {
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}(document, 'script', 'facebook-jssdk'));</script>
<canvas id="bunga-bunga-canvas" style="border: none;" width="800" height="800"></canvas>
<div id="timer" ></div>
	<div id="controls"  >
		<a href="javascript:void(0)" onclick="hide_controls();"> hide/show controls</a>
		<div id="innerC">
		<h1>Bunga-Bunga</h1>
		<h2> Earthquake the movie </h2>
		<h3> Earthquakes in Iceland in 3D animation</h3>
		<h2>Try out <a href="http://bunga-bunga.yngvi.com.s3-website-eu-west-1.amazonaws.com/"> version 2 WIP</a></h2>

		Map overlay: <div id="maplist"></div>
		Depth of map:(pgUp/pgDown)<br><input id="mapdepth" type="range" min="-40" max="2" step="1" value="-15"
			onchange="rangeChange(this)" oninput="rangeChange(this)" >
		<input type="text" id="mapdepthDisp" editable="false" class="disp"><br>
	<!-- (The map is slightly offset, I'm trying to figure it out)<br> -->
		Quake size multiplier: <br><input id="sizeMultiplier" type="range" min="0" max="4" step="0.1" value="0.5"
			onchange="rangeChange(this)" oninput="rangeChange(this)">
		<input type="text" id="sizeMultiplierDisp" editable="false" class="disp"></input> <br>
		Minimum quake size: <br><input id="minQuakeSize" type="range" min="0" max="8" step="0.2" value="0"
			onchange="rangeChange(this)" oninput="rangeChange(this)">
		<input type="text" id="minQuakeSizeDisp"  editable="false" class="disp"></input> <br>
		<input id="dispVerifiedOnly" type="checkbox" > Only display verified earthquakes</input>
		 <br>
		Flyby radius: (up/down) <br><input id="flybyRadius" type="range" min="1" max="400" step="1"
			onchange="rangeChange(this)" oninput="rangeChange(this)">
		<input type="text" id="flybyRadiusDisp"  editable="false" class="disp"></input> <br>
		Flyby height: <br><input id="flybyHeight" type="range" min="-20" max="100" step="0.5" value="20"
			onchange="rangeChange(this)" oninput="rangeChange(this)">
		<input type="text" id="flybyHeightDisp"  editable="false" class="disp"></input> <br>
		Rotation speed: (left/right) <br><input id="rotationSpeed" type="range" min="-3" max="3" step="0.1" value="-0.5"
			onchange="rangeChange(this)" oninput="rangeChange(this)">
		<input type="text" id="rotationSpeedDisp"  editable="false" class="disp"></input> <br>

	Earthquake age in hours:
	<table><tr>	<th style="background-color:#f00; color:white; width:50px">0-4</th>
				<th style="background-color:#f60; color:white; width:50px">4-12</th>
				<th style="background-color:#ff0; color:black; width:50px">12-24</th>
				<th style="background-color:#36c; color:white; width:50px">24-36</th>
				<th style="background-color:#006; color:white; width:50px">36-48</th>
				<th style="background-color:#666; color:white; width:50px; opacity=0.4">48+</th>
	</tr></table>
	<table><tr>	<th style="background-color:#0d0; color:white;">
		<input id="greenGiant" type="checkbox" >Quakes larger than 3</input>
	</th></tr></table>
	The magnitude of each earthquake will detirmine the the size of the bubble.<br>
Also see the Icelandic Meteorological Institute <a href="https://www.vedur.is/skjalftar-og-eldgos/jardskjalftar/reykjanesskagi/">  Reykjanes page</a> <br>
<div class="fb-like" data-href="http://blitzkopf.github.io/" data-layout="button_count" data-action="like" data-show-faces="true" data-share="true"></div>
 <div id="credits">
<p class="credit-list">Created by <a href="mailto:blitzkopf@gmail.com">Yngvi Þór</a> using WebGL, inspired by <a href="http://baering.github.io">3dBulge</a>
 data provided by <a href="http://www.rasmuskr.dk" target="_blank">RasmusKr</a> and <a href="https://www.vedur.is/"> Veðurstofa Íslands </a>

	</div>
	</div>
</div>
<canvas id="texture" height="512" width="512"></canvas>
   </body>

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