Generative art from rectangleworld

Developer
Theun
Size
5,196 Kb
Views
40,480
  1. Generative art from rectangleworld Previews
  2. Generative art from rectangleworld HTML Codes
  3. Generative art from rectangleworld CSS Codes
  4. Generative art from rectangleworld JS Codes

How do I make an generative art from rectangleworld?

Code from http://rectangleworld.com/blog/archives/538. What is a generative art from rectangleworld? How do you make a generative art from rectangleworld? This script and codes were developed by Theun on 22 July 2022, Friday.

Generative art from rectangleworld Previews
IQ Test

Generative art from rectangleworld - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Generative art from rectangleworld</title> <script src="http://s.codepen.io/assets/libs/modernizr.js" type="text/javascript"></script> <link rel="stylesheet" href="css/style.css">
</head>
<body> <html lang="en">
<head>
<meta charset="UTF-8">
<title>HTML5 Canvas Generative Art</title>
<style type="text/css">
</style>
</head>
<body>
<div id="container"> <canvas id="displayCanvas" width="1024px" height="576px"> Your browser does not support HTML5 canvas. </canvas> <form> <p id="caption"> HTML5 Canvas - Morphing Fractal Curves, version 2. <input type="button", id="btnRegenerate" value="regenerate"/>	<input type="button", id="btnExport" value="export image (png)"/> <br><a href="http://www.rectangleworld.com">rectangleworld.com</a> </p> </form>
</div>
</body>
</html> <script src="js/index.js"></script>
</body>
</html>

Generative art from rectangleworld - Script Codes CSS Codes

body {background-color:#000000; color:#333333;}	h4 {font-family: sans-serif; color:#333333; font-size:16px;}	h3 {font-family: sans-serif; color:#333333;}	p {font-family: sans-serif; color:#333333; font-size:14px;}	#caption {position:absolute; width:1024px; text-align:center; top:520px; z-index:1}	a {font-family: sans-serif; color:#d15423; text-decoration:none;}	canvas {}	#displayCanvas {position:absolute; top:10px; z-index:0;}	div {}	#container {width:1024px; height:576px; margin:auto;}

Generative art from rectangleworld - Script Codes JS Codes

window.addEventListener("load", windowLoadHandler, false);
//for debug messages while testing code
var Debugger = function() { };
Debugger.log = function(message) {	try {	console.log(message);	}	catch (exception) {	return;	}
}
function windowLoadHandler() {	canvasApp();
}
function canvasSupport() {	return Modernizr.canvas;
}
function canvasApp() {	if (!canvasSupport()) {	return;	}	var displayCanvas = document.getElementById("displayCanvas");	var context = displayCanvas.getContext("2d");	var displayWidth = displayCanvas.width;	var displayHeight = displayCanvas.height;	//off screen canvas used only when exporting image	var exportCanvas = document.createElement('canvas');	exportCanvas.width = displayWidth;	exportCanvas.height = displayHeight;	var exportCanvasContext = exportCanvas.getContext("2d");	//var exportImage = document.createElement('img');	//buttons	var btnExport = document.getElementById("btnExport");	btnExport.addEventListener("click", exportPressed, false);	var btnRegenerate = document.getElementById("btnRegenerate");	btnRegenerate.addEventListener("click", regeneratePressed, false);	var numCircles;	var maxMaxRad;	var minMaxRad;	var minRadFactor;	var circles;	var iterations;	var numPoints;	var timer;	var drawsPerFrame;	var drawCount;	var bgColor,urlColor;	var lineWidth;	var colorParamArray;	var colorArray;	var dataLists;	var minX, maxX, minY, maxY;	var xSpace, ySpace;	var lineNumber;	var twistAmount;	var fullTurn;	var lineAlpha;	var maxColorValue;	var minColorValue;	init();	function init() {	numCircles = 15; //35	maxMaxRad = 200;	minMaxRad = 200;	minRadFactor = 0;	iterations = 11;	numPoints = Math.pow(2,iterations)+1;	drawsPerFrame = 4;	fullTurn = Math.PI*2*numPoints/(1+numPoints);	minX = -maxMaxRad;	maxX = displayWidth + maxMaxRad;	minY = displayHeight/2-50;	maxY = displayHeight/2+50;	twistAmount = 0.67*Math.PI*2;	stepsPerSegment = Math.floor(800/numCircles);	maxColorValue = 100;	minColorValue = 20;	lineAlpha = 0.10;	bgColor = "#000000";	urlColor = "#333333";	lineWidth = 1.01;	startGenerate();	}	function startGenerate() {	drawCount = 0;	context.setTransform(1,0,0,1,0,0);	context.clearRect(0,0,displayWidth,displayHeight);	setCircles();	colorArray = setColorList(iterations);	lineNumber = 0;	if(timer) {clearInterval(timer);}	timer = setInterval(onTimer,1000/60);	}	function setColorList(iter) {	var r0,g0,b0;	var r1,g1,b1;	var r2,g2,b2;	var param;	var colorArray;	var lastColorObject;	var i, len;	var maxComponentDistance = 32;	var maxComponentFactor = 0.5;	r0 = minColorValue + Math.random()*(maxColorValue-minColorValue);	g0 = minColorValue + Math.random()*(maxColorValue-minColorValue);	b0 = minColorValue + Math.random()*(maxColorValue-minColorValue);;	r1 = minColorValue + Math.random()*(maxColorValue-minColorValue);	g1 = minColorValue + Math.random()*(maxColorValue-minColorValue);	b1 = minColorValue + Math.random()*(maxColorValue-minColorValue);	/*	//can also set colors explicitly here if you like.	r1 = 90;	g1 = 60;	b1 = 20;	r0 = 30;	g0 = 77;	b0 = 66;	*/	a = lineAlpha;	var colorParamArray = setLinePoints(iter);	colorArray = [];	len = colorParamArray.length;	for (i = 0; i < len; i++) {	param = colorParamArray[i];	r = Math.floor(r0 + param*(r1 - r0));	g = Math.floor(g0 + param*(g1 - g0));	b = Math.floor(b0 + param*(b1 - b0));	var newColor = "rgba("+r+","+g+","+b+","+a+")";	colorArray.push(newColor);	}	return colorArray;	}	function setCircles() {	var i;	var r,g,b,a;	var grad;	circles = [];	for (i = 0; i < numCircles; i++) {	maxR = minMaxRad+Math.random()*(maxMaxRad-minMaxRad);	minR = minRadFactor*maxR;	var newCircle = {	centerX: minX + i/(numCircles-1)*(maxX - minX),	centerY: minY + i/(numCircles-1)*(maxY - minY),	//centerY: minY + Math.random()*(maxY - minY),	maxRad : maxR,	minRad : minR,	phase : i/(numCircles-1)*twistAmount,	pointArray : setLinePoints(iterations)	};	circles.push(newCircle);	}	}	function onTimer() {	var i;	var cosTheta, sinTheta;	var theta;	var numCircles = circles.length;	var linParam;	var cosParam;	var centerX, centerY;	var xSqueeze = 0.75;	var x0,y0;	var rad, rad0, rad1;	var phase, phase0, phase1;	for (var k = 0; k < drawsPerFrame; k++) {	theta = lineNumber/(numPoints-1)*fullTurn;	context.globalCompositeOperation = "lighter";	context.lineJoin = "miter";	context.strokeStyle = colorArray[lineNumber];	context.lineWidth = lineWidth;	context.beginPath();	//move to first point	centerX = circles[0].centerX;	centerY = circles[0].centerY;	rad = circles[0].minRad + circles[0].pointArray[lineNumber]*(circles[0].maxRad - circles[0].minRad);	phase = circles[0].phase;	x0 = centerX + xSqueeze*rad*Math.cos(theta + phase);	y0 = centerY + rad*Math.sin(theta + phase);	context.moveTo(x0,y0);	for (i=0; i< numCircles-1; i++) {	//draw between i and i+1 circle	rad0 = circles[i].minRad + circles[i].pointArray[lineNumber]*(circles[i].maxRad - circles[i].minRad);	rad1 = circles[i+1].minRad + circles[i+1].pointArray[lineNumber]*(circles[i+1].maxRad - circles[i+1].minRad);	phase0 = circles[i].phase;	phase1 = circles[i+1].phase;	for (j = 0; j < stepsPerSegment; j++) {	linParam = j/(stepsPerSegment-1);	cosParam = 0.5-0.5*Math.cos(linParam*Math.PI);	//interpolate center	centerX = circles[i].centerX + linParam*(circles[i+1].centerX - circles[i].centerX);	centerY = circles[i].centerY + cosParam*(circles[i+1].centerY - circles[i].centerY);	//interpolate radius	rad = rad0 + cosParam*(rad1 - rad0);	//interpolate phase	phase = phase0 + cosParam*(phase1 - phase0);	x0 = centerX + xSqueeze*rad*Math.cos(theta + phase);	y0 = centerY + rad*Math.sin(theta + phase);	context.lineTo(x0,y0);	}	}	context.stroke();	lineNumber++;	if (lineNumber > numPoints-1) {	clearInterval(timer);	timer = null;	break;	}	}	}	//Here is the function that defines a noisy (but not wildly varying) data set which we will use to draw the curves.	//We first define the points in a linked list, but then store the values in an array.	function setLinePoints(iterations) {	var pointList = {};	var pointArray = [];	pointList.first = {x:0, y:1};	var lastPoint = {x:1, y:1}	var minY = 1;	var maxY = 1;	var point;	var nextPoint;	var dx, newX, newY;	var ratio;	var minRatio = 0.5;	pointList.first.next = lastPoint;	for (var i = 0; i < iterations; i++) {	point = pointList.first;	while (point.next != null) {	nextPoint = point.next;	dx = nextPoint.x - point.x;	newX = 0.5*(point.x + nextPoint.x);	newY = 0.5*(point.y + nextPoint.y);	newY += dx*(Math.random()*2 - 1);	var newPoint = {x:newX, y:newY};	//min, max	if (newY < minY) {	minY = newY;	}	else if (newY > maxY) {	maxY = newY;	}	//put between points	newPoint.next = nextPoint;	point.next = newPoint;	point = nextPoint;	}	}	//normalize to values between 0 and 1	//Also store y values in array here.	if (maxY != minY) {	var normalizeRate = 1/(maxY - minY);	point = pointList.first;	while (point != null) {	point.y = normalizeRate*(point.y - minY);	pointArray.push(point.y);	point = point.next;	}	}	//unlikely that max = min, but could happen if using zero iterations. In this case, set all points equal to 1.	else {	point = pointList.first;	while (point != null) {	point.y = 1;	pointArray.push(point.y);	point = point.next;	}	}	return pointArray;	}	function exportPressed(evt) {	//background - otherwise background will be transparent.	exportCanvasContext.fillStyle = bgColor;	exportCanvasContext.fillRect(0,0,displayWidth,displayHeight);	//draw	exportCanvasContext.drawImage(displayCanvas, 0,0,displayWidth,displayHeight,0,0,displayWidth,displayHeight);	//add printed url to image	exportCanvasContext.fillStyle = urlColor;	exportCanvasContext.font = 'bold italic 16px Helvetica, Arial, sans-serif';	exportCanvasContext.textBaseline = "top";	var metrics = exportCanvasContext.measureText("rectangleworld.com");	exportCanvasContext.fillText("rectangleworld.com", displayWidth - metrics.width - 10, 5);	//we will open a new window with the image contained within:	//retrieve canvas image as data URL:	var dataURL = exportCanvas.toDataURL("image/png");	//open a new window of appropriate size to hold the image:	var imageWindow = window.open("", "fractalLineImage", "left=0,top=0,width="+displayWidth+",height="+displayHeight+",toolbar=0,resizable=0");	//write some html into the new window, creating an empty image:	imageWindow.document.write("<title>Export Image</title>")	imageWindow.document.write("<img id='exportImage'"	+ " alt=''"	+ " height='" + displayHeight + "'"	+ " width='" + displayWidth + "'"	+ " style='position:absolute;left:0;top:0'/>");	imageWindow.document.close();	//copy the image into the empty img in the newly opened window:	var exportImage = imageWindow.document.getElementById("exportImage");	exportImage.src = dataURL;	}	function regeneratePressed(evt) {	startGenerate();	}
}
Generative art from rectangleworld - Script Codes
Generative art from rectangleworld - Script Codes
Home Page Home
Developer Theun
Username tjoen
Uploaded July 22, 2022
Rating 4
Size 5,196 Kb
Views 40,480
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