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プログラミングとイラストレーション > HTML5 > パーリン・ノイズ・ライン|HTML5

パーリン・ノイズ・ライン|HTML5

ペルリン・ノイズ・ライン|HTML5

ペルリン・ノイズ・ライン|HTML5(HTML5, JavaScript, CSS3) : デモ

ペルリン・ノイズ・ライン|HTML5(HTML5, JavaScript, CSS3) : ZIPファイル(15kb)

1.HTML

<!DOCTYPE html>
<html lang="jp">
    <head>
        <meta charset="UTF-8" />
        <title>ペルリン・ノイズ・ライン|Perlin Noise Line</title>
        <link href="css/base.css" rel="stylesheet" type="text/css">
        <script src="js/devicecheck.js"></script>
        <script src="js/Perlin.js"></script>
        <script src="js/base.js"></script>
    </head>
    <body>
        <div id="contents">
            <canvas id="canvas" width="275" height="275"></canvas>
        </div>
    </body>
</html>

2.CSS


@charset "utf-8";
 
body
{
    margin:0;
    padding:0;
    background-color: #fff;
}
 
#contents
{
    position: absolute;
    top: 0;
    left: 0;
    width: 275px;
    height:275px;
    border: 1px solid #000;
    overflow:hidden;
}
 
#canvas
{
    position: absolute;
    top: 0;
    left: 0;
    width: 275px;
    height:275px;
}

#txt
{
	position: absolute;
    top: 5px;
    left: 5px;
    width: 120px;
    height:12px;
    font-size: 12px;
}

3.JavaScript

Perlin.js

// Perlin  1.0
// Ported from java (http://mrl.nyu.edu/~perlin/noise/) by Ron Valstar (http://www.sjeiti.com/)
// and some help from http://freespace.virgin.net/hugo.elias/models/m_perlin.htm
// AS3 optimizations by Mario Klingemann http://www.quasimondo.com
// then ported to js by Ron Valstar
if (!this.Perlin) {
	var Perlin = function() {

		var oRng = Math;

		var p = [151,160,137,91,90,15,131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,190,6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,88,237,149,56,87,174,20,125,136,171,168,68,175,74,165,71,134,139,48,27,166,77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,102,143,54,65,25,63,161,1,216,80,73,209,76,132,187,208,89,18,169,200,196,135,130,116,188,159,86,164,100,109,198,173,186,3,64,52,217,226,250,124,123,5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,223,183,170,213,119,248,152,2,44,154,163,70,221,153,101,155,167,43,172,9,129,22,39,253,19,98,108,110,79,113,224,232,178,185,112,104,218,246,97,228,251,34,242,193,238,210,144,12,191,179,162,241,81,51,145,235,249,14,239,107,49,192,214,31,181,199,106,157,184,84,204,176,115,121,50,45,127,4,150,254,138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180,151,160,137,91,90,15,131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,190,6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,88,237,149,56,87,174,20,125,136,171,168,68,175,74,165,71,134,139,48,27,166,77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,102,143,54,65,25,63,161,1,216,80,73,209,76,132,187,208,89,18,169,200,196,135,130,116,188,159,86,164,100,109,198,173,186,3,64,52,217,226,250,124,123,5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,223,183,170,213,119,248,152,2,44,154,163,70,221,153,101,155,167,43,172,9,129,22,39,253,19,98,108,110,79,113,224,232,178,185,112,104,218,246,97,228,251,34,242,193,238,210,144,12,191,179,162,241,81,51,145,235,249,14,239,107,49,192,214,31,181,199,106,157,184,84,204,176,115,121,50,45,127,4,150,254,138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180];

		var iOctaves = 1;
		var fPersistence = 0.5;
		
		var aOctFreq; // frequency per octave
		var aOctPers; // persistence per octave
		var fPersMax; // 1 / max persistence

		var iXoffset;
		var iYoffset;
		var iZoffset;

		// octFreqPers
		var octFreqPers = function octFreqPers() {
			var fFreq, fPers;
			aOctFreq = [];
			aOctPers = [];
			fPersMax = 0;
			for (var i=0;i<iOctaves;i++) {
				fFreq = Math.pow(2,i);
				fPers = Math.pow(fPersistence,i);
				fPersMax += fPers;
				aOctFreq.push( fFreq );
				aOctPers.push( fPers );
			}
			fPersMax = 1 / fPersMax;
		};
		// setOffset
		var setOffset = function setOffset(n) {
			iXoffset = Math.floor(oRng.random()*256);
			iYoffset = Math.floor(oRng.random()*256);
			iZoffset = Math.floor(oRng.random()*256);
		};
		// init
		setOffset();
		octFreqPers();
		//
		// return
		return {
			 noise: function(x,y,z) {

				x = x||0;
				y = y||0;
				z = z||0;

				var fResult = 0;
				var fFreq, fPers;
				var xf, yf, zf, u, v, w, xx, yy, zz;
				var x1, y1, z1;
				var X, Y, Z, A, B, AA, AB, BA, BB, hash;
				var g1, g2, g3, g4, g5, g6, g7, g8;

				x += iXoffset;
				y += iYoffset;
				z += iZoffset;

				for (var i=0;i<iOctaves;i++) {
					fFreq = aOctFreq[i];
					fPers = aOctPers[i];

					xx = x * fFreq;
					yy = y * fFreq;
					zz = z * fFreq;

					xf = Math.floor(xx);
					yf = Math.floor(yy);
					zf = Math.floor(zz);

					X = Math.floor(xf & 255);
					Y = Math.floor(yf & 255);
					Z = Math.floor(zf & 255);

					xx -= xf;
					yy -= yf;
					zz -= zf;

					u = xx * xx * xx * (xx * (xx*6 - 15) + 10);
					v = yy * yy * yy * (yy * (yy*6 - 15) + 10);
					w = zz * zz * zz * (zz * (zz*6 - 15) + 10);

					A  = Math.round(p[X]) + Y;
					AA = Math.round(p[A]) + Z;
					AB = Math.round(p[Math.round(A+1)]) + Z;
					B  = Math.round(p[Math.round(X+1)]) + Y;
					BA = Math.round(p[B]) + Z;
					BB = Math.round(p[Math.round(B+1)]) + Z;

					x1 = xx-1;
					y1 = yy-1;
					z1 = zz-1;

					hash = Math.round(p[Math.round(BB+1)]) & 15;
					g1 = ((hash&1) === 0 ? (hash<8 ? x1 : y1) : (hash<8 ? -x1 : -y1)) + ((hash&2) === 0 ? hash<4 ? y1 : ( hash===12 ? x1 : z1 ) : hash<4 ? -y1 : ( hash===14 ? -x1 : -z1 ));

					hash = Math.round(p[Math.round(AB+1)]) & 15;
					g2 = ((hash&1) === 0 ? (hash<8 ? xx : y1) : (hash<8 ? -xx : -y1)) + ((hash&2) === 0 ? hash<4 ? y1 : ( hash===12 ? xx : z1 ) : hash<4 ? -y1 : ( hash===14 ? -xx : -z1 ));

					hash = Math.round(p[Math.round(BA+1)]) & 15;
					g3 = ((hash&1) === 0 ? (hash<8 ? x1 : yy) : (hash<8 ? -x1 : -yy)) + ((hash&2) === 0 ? hash<4 ? yy : ( hash===12 ? x1 : z1 ) : hash<4 ? -yy : ( hash===14 ? -x1 : -z1 ));

					hash = Math.round(p[Math.round(AA+1)]) & 15;
					g4 = ((hash&1) === 0 ? (hash<8 ? xx : yy) : (hash<8 ? -xx : -yy)) + ((hash&2) === 0 ? hash<4 ? yy : ( hash===12 ? xx : z1 ) : hash<4 ? -yy : ( hash===14 ? -xx : -z1 ));

					hash = Math.round(p[BB]) & 15;
					g5 = ((hash&1) === 0 ? (hash<8 ? x1 : y1) : (hash<8 ? -x1 : -y1)) + ((hash&2) === 0 ? hash<4 ? y1 : ( hash===12 ? x1 : zz ) : hash<4 ? -y1 : ( hash===14 ? -x1 : -zz ));

					hash = Math.round(p[AB]) & 15;
					g6 = ((hash&1) === 0 ? (hash<8 ? xx : y1) : (hash<8 ? -xx : -y1)) + ((hash&2) === 0 ? hash<4 ? y1 : ( hash===12 ? xx : zz ) : hash<4 ? -y1 : ( hash===14 ? -xx : -zz ));

					hash = Math.round(p[BA]) & 15;
					g7 = ((hash&1) === 0 ? (hash<8 ? x1 : yy) : (hash<8 ? -x1 : -yy)) + ((hash&2) === 0 ? hash<4 ? yy : ( hash===12 ? x1 : zz ) : hash<4 ? -yy : ( hash===14 ? -x1 : -zz ));

					hash = Math.round(p[AA]) & 15;
					g8 = ((hash&1) === 0 ? (hash<8 ? xx : yy) : (hash<8 ? -xx : -yy)) + ((hash&2) === 0 ? hash<4 ? yy : ( hash===12 ? xx : zz ) : hash<4 ? -yy : ( hash===14 ? -xx : -zz ));

					g2 += u * (g1 - g2);
					g4 += u * (g3 - g4);
					g6 += u * (g5 - g6);
					g8 += u * (g7 - g8);

					g4 += v * (g2 - g4);
					g8 += v * (g6 - g8);

					fResult += ( (g8 + w * (g4 - g8))) * fPers;
				}

				return ( fResult * fPersMax + 1 ) * 0.5;
			},noiseDetail: function(octaves,falloff) {
				iOctaves = octaves||iOctaves;
				fPersistence = falloff||fPersistence;
				octFreqPers();
			},setRng: function(r) {
				oRng = r;
				setOffset();
				octFreqPers();
			},toString: function() {
				return "[object Perlin "+iOctaves+" "+fPersistence+"]";
			}
		};
	}();
}

base.js

window.addEventListener("load", init, false);
 
function init()
{
    var offsetX = 0,
    offsetY = 0,
   	ctx,
   	theCanvas,
   	theContents,
    balls = [],
    numBalls = 350,
    mouseX = 0,
    mouseY = 0,
    buttonDown,
    buttonMove,
    step = 15,
    ynoise = Math.random() * 10,
    buttonUp;
    
    //ボタンタイプ
    if(g_mobiledevice === true)
    {
        buttonDown = 'touchstart';
        buttonMove = 'touchmove';
        buttonUp = 'touchend';
    }
    else
    {
        buttonDown = 'mousedown';
        buttonMove = 'mousemove';
        buttonUp = 'mouseup';
    }
    
    document.getElementById('canvas').addEventListener('touchstart', function() 
    {
        event.preventDefault();
    });
    document.getElementById('canvas').addEventListener('touchmove', function() 
    {
        event.preventDefault();
    });
    document.getElementById('canvas').addEventListener('touchend', function() 
    {
        event.preventDefault();
    });
     
    theContents = document.getElementById("contents");
    offsetX = (theContents.currentStyle || document.defaultView.getComputedStyle(theContents,'')).width;
    offsetX = Number(offsetX.replace('px',''));
 
    offsetY = (theContents.currentStyle || document.defaultView.getComputedStyle(theContents,'')).height;
    offsetY = Number(offsetY.replace('px',''));
    
    document.getElementById('canvas').addEventListener(buttonMove, mouseMoveHandler, false);
     
    for(var i = 0; i < numBalls; i+=step)
    {
        var ball = {};
        ball.red = 0;
        ball.green = 0;
        ball.blue = 0;
        ball.x = i - numBalls / 2 + offsetX / 2;
        var y = 0 + Perlin.noise(0, ynoise, 0) * 10;
        ball.y = y + offsetY / 2;
        ball.cX = offsetX / 2,
        ball.cY = offsetY / 2;
        ynoise += 0.5;
        balls.push(ball);
    }
    
    ctx = document.getElementById('canvas').getContext("2d");
    setBallAnimation();
    
    function setBallAnimation()
	{
		animation();
		requestAnimationFrame(setBallAnimation);
	}
     
    function animation()
    {
    	var angle = 0;
    	var cos = Math.cos(angle);
    	var sin = Math.sin(angle);
        ctx.clearRect(0, 0, 300, 300);
        
        for(var i = 0; i < balls.length; i++)
        {
            var ball = balls[i];
            
            var x1 = ball.x - ball.cX;
	    	var y1 = ball.y - ball.cY;
	    	var x2 = cos * x1 - sin * y1;
	    	var y2 = cos * y1 + sin * x1;
	        ball.x = ball.cX + x2;
	        ball.y = ball.cY + y2;
        }
        
        ctx.strokeStyle = "#000000";
        ctx.lineWidth = 2;
        ctx.beginPath();
        ctx.moveTo(balls[0].x, balls[0].y);
        
        for(var i = 1; i < balls.length; i++)
        {
        	ctx.lineTo(balls[i].x, balls[i].y);
        }
        ctx.stroke();
    }
    
    function mouseMoveHandler(e)
	{
		if(g_mobiledevice)
	    {
	        var rect = event.currentTarget.getBoundingClientRect();
	        mouseX = event.touches[0].pageX - rect.left;
	        mouseY = event.touches[0].pageY - rect.top;
	    }
	    else
	    if(g_browsername == 'MSIE'||g_browsername == 'Opera')
	    {
	    	rect = document.getElementById("canvas").getBoundingClientRect();
	        mouseX = event.clientX - rect.left;
	        mouseY = event.clientY - rect.top;
	    }
	    else
	    if(g_browsername == 'Firefox')
	    {
	    	rect = document.getElementById("canvas").getBoundingClientRect();
	        mouseX = e.clientX - rect.left;
	        mouseY = e.clientY - rect.top;
	    }
	    else
	    {
	    	rect = event.currentTarget.getBoundingClientRect();
	        mouseX = event.clientX - rect.left;
	        mouseY = event.clientY - rect.top;
	    }
	}
}

// 各ブラウザ対応
(function()
{
	var requestAnimationFrame = window.requestAnimationFrame ||
			window.webkitRequestAnimationFrame ||
			window.mozRequestAnimationFrame ||
			window.oRequestAnimationFrame ||
			window.msRequestAnimationFrame ||
			function(callback)
			{
				setTimeout(callback, 1000 / 60);
			};

	var cancelAnimationFrame = window.cancelAnimationFrame ||
			window.webkitCancelRequestAnimationFrame ||
			window.mozCancelRequestAnimationFrame ||
			window.oCancelRequestAnimationFrame ||
			window.msCancelRequestAnimationFrame ||
			function(id)
			{
				clearTimeout(id);
			};

	window.requestAnimationFrame = requestAnimationFrame;
	window.cancelAnimationFrame = cancelAnimationFrame;
})();

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