Labyrinth-path-finder/index.html at master · motcodes/Labyrinth-path-finder · GitHub

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<!DOCTYPE html>
<html>

<head>

	<title>Visualisierung von Algorithmen: Labyrinth</title>

	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="stylesheet" href="http://www.w3schools.com/lib/w3.css">
</head>

<body class="w3-container">

	<header class="w3-container w3-blue w3-round-large w3-card-4">
		<h1>Visualisierung von Algorithmen: Labyrinth</h1>
	</header>
	<p>by NAME... (2015)</p>
	<p>First enter size of Lab then click redraw and then start searchWayOut</p>

	<form class="w3-form w3-card-4">

		<div class="w3-input-group">
			<input id="input_size" type="number" value="20" min="4" max="40" placeholder="20" maxlength="3" size="3">
			<label>Labyrinth-Size</label>
		</div>

		<div class="w3-input-group">
			<input id="input_slow" type="number" value="5" min="0" max="1000" placeholder="5" maxlength="3" size="3">
			<label>Verz&ouml;gerung</label>

		</div>

		<div class="w3-input-group">
			<input type="button" class="w3-btn w3-blue w3-round-large" value="draw Labyrinth" onclick="start_redraw();" />
			<input type="button" class="w3-btn w3-blue w3-round-large" value="searchWayOut" onclick="start_searchwayout();" />
		</div>
	</form>

	<p id="duration">
		elapsed time ...
	</p>

	<p>
		<canvas id="canvas" width="600" height="400" class="w3-round-large w3-card-4" style="background-color:blue"></canvas>
	</p>

	<p>
		See also:
		<ul class="w3-ul w3-card-4">
			<li>
				<a href="http://www.w3schools.com/w3css/default.asp">http://www.w3schools.com/w3css/default.asp</a>
			</li>
			<li>
				<a href="http://www.w3schools.com/js/default.asp">http://www.w3schools.com/js/default.asp</a>
			</li>
		</ul>
	</p>


	<footer class="w3-container w3-blue w3-round-large w3-card-4">
		<p>NAME .... (2015)</p>
	</footer>


	<script>
		var canvas = document.getElementById("canvas");
		var gc = canvas.getContext("2d");
		var width = document.getElementById("canvas").getAttribute("width");
		var height = document.getElementById("canvas").getAttribute("height");

		var input_size = document.getElementById("input_size");
		var size = input_size.value;

		var input_slow = document.getElementById("input_slow");
		var slow = input_slow.value;


		var rows = Math.floor(height / size);
		var cols = Math.floor(width / size);


		// time measure (duration)
		var start;
		var elapsed;

		// the Labyrinth is a 2 dim Array
		var a = [
			[]
		];

		// init
		// ----------------------------------------------------------------
		start_redraw();

		var FPS = 100;

		/**
		 * Returns a random integer between min (inclusive) and max (inclusive)
		 * Using Math.round() will give you a non-uniform distribution!
		 */
		function getRandomInt(min, max) {
			return Math.floor(Math.random() * (max - min + 1)) + min;
		}


		function start_redraw() {
			size = size = input_size.value;

			rows = Math.floor(height / size);
			cols = Math.floor(width / size);


			for (var x = 0; x < cols; x++) {
				a[x] = [];
				for (var y = 0; y < rows; y++) {
					if (getRandomInt(0, 100) < 33) //höchstens 1/3 schwarz
						a[x][y] = "black";
					else
						a[x][y] = "white";
				}
			}

			//Umrandung oben und unten zeichnen
			for (var x = 0; x < cols; x++) {
				a[x][0] = "black"; //oben
				a[x][rows - 1] = "black"; //unten
			}

			//Umrandung links und rechts zeichnen
			for (var y = 0; y < rows; y++) {
				a[0][y] = "black"; // li
				a[cols - 1][y] = "black"; // re
			}

			//' Eingang und ausgang
			a[0][0] = "white";
			a[0][1] = "white";

			a[cols - 1][rows - 1] = "white";
			a[cols - 1][rows - 2] = "white";

			paint();
		}


		function paint() {
			console.log("paint");
			for (var x = 0; x < cols; x++) {
				for (var y = 0; y < rows; y++) {
					gc.fillStyle = a[x][y];
					gc.fillRect(x * size, y * size, size, size);
				}
			}
		}


		function start_searchwayout() {
			start = new Date().getTime();

			// START web worker
			var worker = new Worker("worker_labyrinth.js");


			// SENDING array data to the worker using a copy memory operation
			slow = input_slow.value;
			worker.postMessage({
				a: a,
				rows: rows,
				cols: cols,
				slow: slow
			});

			// RECEIVEING array
			// finished: 1|-1, found: 1|-1 , element: a[][] ,y: y ,x:x

			worker.onmessage = function (event) {
				a[event.data.xx][event.data.yy] = event.data.element;
				gc.fillStyle = a[event.data.xx][event.data.yy];
				gc.fillRect(event.data.xx * size, event.data.yy * size, size, size);

				if (event.data.finished == 1) {
					elapsed = new Date().getTime() - start;
					document.getElementById("duration").innerHTML = "elapsed time " + elapsed + " ms";

					if (event.data.found == 1) {
						alert("FOUND!!!");
					} else {
						alert("NOT found!!!");
					}

					worker.terminate();
				}
			};
		}
	</script>
</body>

</html>