From 59976f1f12b5f8c57d16c622e5f412e49d0c4062 Mon Sep 17 00:00:00 2001
From: Kristian Lyngstol <kristian@bohemians.org>
Date: Fri, 10 Apr 2015 01:39:04 +0200
Subject: NMS2: Integrate the prototype-map into nms2

---
 web/nms.gathering.org/nms2/map.html |  14 +-
 web/nms.gathering.org/nms2/map.js   | 589 ++++++++++++++++++++++++++++++------
 2 files changed, 506 insertions(+), 97 deletions(-)

diff --git a/web/nms.gathering.org/nms2/map.html b/web/nms.gathering.org/nms2/map.html
index dbede7c..685b014 100644
--- a/web/nms.gathering.org/nms2/map.html
+++ b/web/nms.gathering.org/nms2/map.html
@@ -44,7 +44,12 @@
                                 <li><a href="#temp" onclick="setUpdater(handler_temp)">Temperature map</a></li>
                                 <li><a href="#ping" onclick="setUpdater(handler_ping)">Ping map</a></li>
                                 <li><a href="#traffic" onclick="setUpdater(handler_traffic)">Traffic map</a></li>
+                                <li><a href="#disco" onclick="setUpdater(handler_disco)">DISCO</a></li>
+				<li class="divider"> </li>
                                 <li><a href="#" onclick="toggleNightMode()" title="Add 'nightMode' anywhere in the url to auto-enable">Toggle Night Mode</a></li>
+				<li class="divider"> </li>
+				<li><input type="range" id="scaler" name="points" min="0.5" max="3" step="0.01" onchange="scaleChange()" /></li>
+				<li><a href="#">Scale: <div id="scaler-text"></div></a></li>
                             </ul>
                         </li>
                     </ul>
@@ -65,7 +70,10 @@
 
         <div class="row-fluid">
             <div class="span12">
-                <p id="playground"><img src="img/tg15-salkart.png" alt="" id="map" style="filter:invert; z-index: 0;"></p>
+<canvas id="myCanvas" width="1920" height="1032" style="cursor: pointer; border:1px solid #000000;" onclick="canvasClick(event)">
+</canvas>
+
+<div style="display:none;"><img id="source" src="prototype/tg15-salkart-full.png" ></div>
             </div>
         </div>
 
@@ -86,6 +94,8 @@
     <script type="text/javascript">
     updatePorts();
     updatePing();
+	window.addEventListener('resize',resizeEvent,true);
+	document.addEventListener('load',resizeEvent,true);
     setInterval(updatePorts,5000);
     setInterval(updateInfo,5000);
     setInterval(updatePing,1000);
@@ -100,6 +110,8 @@
             setUpdater(handler_temp);
     } else if (/#traffic/.exec(url)) {
             setUpdater(handler_traffic);
+    } else if (/#disco/.exec(url)) {
+            setUpdater(handler_disco);
     } else {
             setUpdater(handler_ping);
     }
diff --git a/web/nms.gathering.org/nms2/map.js b/web/nms.gathering.org/nms2/map.js
index 8aff190..d7581cc 100644
--- a/web/nms.gathering.org/nms2/map.js
+++ b/web/nms.gathering.org/nms2/map.js
@@ -12,6 +12,29 @@ var nms = {
 	did_update:false // Set to 'true' after we've done some basic updating
 };
 
+var c = document.getElementById("myCanvas");
+var ctx = c.getContext("2d");
+var fontSize = 12;
+var fontFace = "Arial Black";
+var nightMode = false;
+var nightBlur = {};
+var orig = {
+	width:1920,
+	height:1032
+	};
+
+var canvas = { 
+	width:0,
+	height:0,
+	scale:1
+};
+var margin = {
+	x:10,
+	y:20,
+	text:3
+};
+
+
 /*
  * Handlers. "updater" is run periodically when the handler is active, and
  * "init" is run once when it's activated.
@@ -41,6 +64,12 @@ var handler_traffic = {
 	name:"Uplink traffic map"
 };
 
+var handler_disco = {
+	updater:randomizeColors,
+	init:discoInit,
+	name:"Disco fever"
+};
+
 function byteCount(bytes) {
 	var units = ['', 'K', 'M', 'G', 'T', 'P'];
 	i = 0;
@@ -52,6 +81,8 @@ function byteCount(bytes) {
 }
 
 function toggleNightMode() {
+	setNightMode(!nightMode);
+	/*
 	var bg = "white";
 	var filter = "invert(0%)";
 	if (!nms.night) {
@@ -65,6 +96,7 @@ function toggleNightMode() {
 	body.style.background = bg;
 	var img = document.getElementById("map");
 	img.style.webkitFilter = filter;
+	*/
 }
 
 /*
@@ -176,7 +208,11 @@ function switchInfo(x)
 
 		tr = document.createElement("tr"); td1 = document.createElement("td"); td2 = document.createElement("td");
 		td1.innerHTML = "Latency";
-		td2.innerHTML = nms.ping_data["switches"][x]["latency"];
+		if (nms.ping_data && nms.ping_data["switches"] && nms.ping_data["switches"][x]) {
+			td2.innerHTML = nms.ping_data["switches"][x]["latency"];
+		} else {
+			td2.innerHTML = "N/A";
+		}
 		tr.appendChild(td1); tr.appendChild(td2); switchele.appendChild(tr);
 
 		tr = document.createElement("tr"); td1 = document.createElement("td"); td2 = document.createElement("td");
@@ -208,65 +244,6 @@ function switchInfo(x)
 		swtop.appendChild(switchele);
 }
 
-/*
- * Draw/create a specific switch
- */
-function createSwitch(sysname, x, y, zorder, width, height)
-{
-	var s = document.createElement("div");
-	var map = document.getElementById('map');
-	var top_offset = map.getBoundingClientRect().top;
-	var left_offset = map.getBoundingClientRect().left;
-
-	var onclick = "console.log(\"foo\");";
-	s.style.position = 'absolute';
-	s.style.left = (left_offset + x) + 'px';
-	s.style.top = (top_offset + y) + 'px';
-	s.style.width = width + 'px';
-	s.style.height = height + 'px';
-	s.style.backgroundColor = '#0000ff';
-	s.style.border = '1px solid black';
-	s.style.padding = "0";
-	s.style.zIndex = zorder + 100;
-	s.style.cursor = "pointer";
-	s.addEventListener("click", function(){ switchInfo(sysname); });
-	s.title = sysname + " - " + nms.switches_now["switches"][sysname]["management"]["ip"];
-	nms.globalmap[sysname] = s;
-
-	var span = document.createElement("div");
-	span.className = "switchname";
-	if (width < 1.5 * height) {
-		span.className = "switchname rot";
-	}
-	span.style.border = "0";
-	span.style.padding = "0";
-	s.appendChild(span);
-
-	var text = document.createTextNode(sysname);
-	span.appendChild(text);
-
-	s.setAttribute("data-sysname", sysname);
-
-	document.body.appendChild(s);
-}
-
-/*
- * Draw/add switches.
- */
-function drawSwitches()
-{
-	for (var sysname in nms.switches_now["switches"]) {
-		var s = nms.switches_now['switches'][sysname]["placement"];
-		createSwitch(sysname,
-		              parseInt(s['x']),
-			      parseInt(s['y']),
-			      parseInt(s['zorder']),
-		              parseInt(s['width']),
-		              parseInt(s['height']));
-	}
-	nms.drawn = true;
-}
-
 /*
  * Update various info elements periodically.
  */
@@ -279,29 +256,6 @@ function updateInfo()
 	speedele.innerHTML = (8 * parseInt(nms.speed) / 1024 / 1024 / 1024 ).toPrecision(5) + " Gbit/s";
 }
 
-/*
- * Short hand for setting color on a switch in the map
- */
-function colorSwitch(sysname, color)
-{
-	if (nms.globalmap[sysname]) {
-		nms.globalmap[sysname].style.background = color;
-	}
-}
-
-/*
- * Reset switch color to "blue".
- * Used when changing mode so colors don't linger for switches that are
- * not explicitly colored by the update handler.
- */
-function resetSwitches() {
-	if (nms.switches_now) {
-		for (var sw in nms.switches_now["switches"]) {
-			colorSwitch(sw,"blue");
-		}
-	}
-}
-
 /*
  * Update function for uplink map
  * Run periodically when uplink map is active.
@@ -327,15 +281,15 @@ function uplinkUpdater()
 			 }
 		}
 		if (uplinks == 0) {
-			colorSwitch(sw,"blue");
+			setSwitchColor(sw,"blue");
 		} else if (uplinks == 1) {
-			colorSwitch(sw,"red");
+			setSwitchColor(sw,"red");
 		} else if (uplinks == 2) {
-			colorSwitch(sw, "yellow");
+			setSwitchColor(sw, "yellow");
 		} else if (uplinks == 3) { 
-			colorSwitch(sw, "green");
+			setSwitchColor(sw, "green");
 		} else if (uplinks > 3) {
-			colorSwitch(sw, "white");
+			setSwitchColor(sw, "white");
 		}
 	}
 }
@@ -372,15 +326,15 @@ function trafficUpdater()
 		}
 		var m = 1024 * 1024 / 8;
 		if (speed == 0) {
-			colorSwitch(sw,"blue");
+			setSwitchColor(sw,"blue");
 		} else if (speed > (1000 * m)) {
-			colorSwitch(sw,"red");
+			setSwitchColor(sw,"red");
 		} else if (speed > (800 * m)) {
-			colorSwitch(sw, "yellow");
+			setSwitchColor(sw, "yellow");
 		} else if (speed > (5 * m)) { 
-			colorSwitch(sw, "green");
+			setSwitchColor(sw, "green");
 		} else {
-			colorSwitch(sw, "white");
+			setSwitchColor(sw, "white");
 		}
 	}
 }
@@ -428,7 +382,7 @@ function tempUpdater()
 	for (sw in nms.switches_now["switches"]) {
 		var t = nms.switches_now["switches"][sw]["temp"];
 		
-		colorSwitch(sw, temp_color(t));
+		setSwitchColor(sw, temp_color(t));
 	}
 }
 
@@ -475,7 +429,7 @@ function rgb_from_latency(latency_ms)
 function pingUpdater()
 {
 	for (var sw in nms.ping_data["switches"]) {
-		colorSwitch(sw, gradient_from_latency(nms.ping_data["switches"][sw]["latency"]));
+		setSwitchColor(sw, gradient_from_latency(nms.ping_data["switches"][sw]["latency"]));
 	}
 }
 
@@ -504,7 +458,7 @@ function updateMap()
 function setUpdater(fo)
 {
 	nms.updater = undefined;
-	resetSwitches();
+	resetColors();
 	fo.init();
 	nms.updater = fo.updater;
 	var foo = document.getElementById("updater_name");
@@ -523,6 +477,7 @@ function setUpdater(fo)
 function initialUpdate()
 {
 	if (nms.ping_data && nms.switches_then && nms.switches_now && nms.updater != undefined && nms.did_update == false ) {
+		resizeEvent();
 		if (!nms.drawn) {
 			drawSwitches();
 		}
@@ -559,6 +514,7 @@ function updatePorts()
 		success: function (data, textStatus, jqXHR) {
 			var  switchdata = JSON.parse(data);
 			nms.switches_now = switchdata;
+			parseIntPlacements();
 			initialUpdate();
 		}
 	});
@@ -628,3 +584,444 @@ function updateSpeed()
 	}
 	nms.speed = speed_in;
 }
+
+/*
+ * Draw a linknet with index i.
+ *
+ * XXX: Might have to change the index here to match backend
+ */
+function drawLinknet(i)
+{
+	var c1 = nms.switches_now.linknets[i].c1 ? nms.switches_now.linknets[i].c1 : "blue";
+	var c2 = nms.switches_now.linknets[i].c2 ? nms.switches_now.linknets[i].c2 : "blue";
+	if (nms.switches_now.switches[nms.switches_now.linknets[i].sysname1] && nms.switches_now.switches[nms.switches_now.linknets[i].sysname2]) {
+		connectSwitches(nms.switches_now.linknets[i].sysname1,nms.switches_now.linknets[i].sysname2, c1, c2);
+	}
+}
+
+/*
+ * Draw all linknets
+ */
+function drawLinknets()
+{
+	if (nms.switches_now && nms.switches_now.linknets) {
+	for (var i in nms.switches_now.linknets) {
+		drawLinknet(i);
+	}
+	}
+}
+
+/*
+ * Change both colors of a linknet.
+ *
+ * XXX: Probably have to change this to better match the backend data
+ */
+function setLinknetColors(i,c1,c2)
+{
+	nms.switches_now.linknets[i].c1 = c1;
+	nms.switches_now.linknets[i].c2 = c2;
+}
+
+/*
+ * (Re)draw a switch 'sw'.
+ *
+ * Color defaults to 'blue' if it's not set in the data structure.
+ */
+function drawSwitch(sw)
+{
+		var box = nms.switches_now['switches'][sw]['placement'];
+		var color = nms.switches_now['switches'][sw]['color'];
+		if (color == undefined) {
+			color = "blue";
+		}
+		ctx.fillStyle = color;
+		if (nightMode && nightBlur[sw] != true) {
+			ctx.shadowBlur = 10;
+			ctx.shadowColor = "#00EE00";
+			nightBlur[sw] = true;
+		} else {
+			ctx.shadowBlur = 0;
+			ctx.shadowColor = "#000000";
+		}
+		drawBox(box['x'],box['y'],box['width'],box['height']);
+		ctx.shadowBlur = 0;
+		if ((box['width'] + 10 )< box['height'] )
+			drawSideways(sw,box['x'],box['y'],box['width'],box['height']);
+		else
+			drawRegular(sw,box['x'],box['y'],box['width'],box['height']);
+}
+
+/*
+ * Make sure all placements of switches are parsed as integers so we don't
+ * have to pollute the code with pasreInt() every time we use it.
+ */
+function parseIntPlacements() {
+	for (var sw in nms.switches_now.switches) {
+		nms.switches_now.switches[sw]['placement']['x'] =
+			parseInt(nms.switches_now.switches[sw]['placement']['x']);
+		nms.switches_now.switches[sw]['placement']['y'] =
+			parseInt(nms.switches_now.switches[sw]['placement']['y']);
+		nms.switches_now.switches[sw]['placement']['width'] =
+			parseInt(nms.switches_now.switches[sw]['placement']['width']);
+		nms.switches_now.switches[sw]['placement']['height'] =
+			parseInt(nms.switches_now.switches[sw]['placement']['height']);
+	}
+}
+
+/*
+ * Draw all switches
+ */
+function drawSwitches()
+{
+	if (!nms.switches_now || !nms.switches_now.switches)
+		return;
+	for (var sw in nms.switches_now.switches) {
+		drawSwitch(sw);
+	}
+	nms.drawn = true;
+}
+
+/*
+ * Draw foreground/scene.
+ *
+ * This is used so linknets are drawn before switches. If a switch is all
+ * that has changed, we just need to re-draw that, but linknets require
+ * scene-redrawing.
+ */
+function drawScene()
+{
+	ctx.font = Math.round(fontSize * canvas.scale) + "px " + fontFace;
+	drawLinknets();
+	drawSwitches();
+}
+
+/*
+ * Set the scale factor and (re)draw the scene and background.
+ * Uses canvas.scale and updates canvas.height and canvas.width.
+ */
+function setScale()
+{
+	c.height = canvas.height =  orig.height * canvas.scale ;
+	c.width = canvas.width = orig.width * canvas.scale ;
+	drawBG();
+	nightBlur = {};
+	drawScene();
+	document.getElementById("scaler").value = canvas.scale;
+	document.getElementById("scaler-text").innerHTML = (parseFloat(canvas.scale)).toPrecision(3);
+}
+
+/*
+ * Returns true if the coordinates (x,y) is inside the box defined by
+ * box.{x,y,w.h} (e.g.: placement of a switch).
+ */
+function isin(box, x, y)
+{
+	if ((x >= box.x) && (x <= (box.x + box.width)) && (y >= box.y) && (y <= (box.y + box.height))) {
+		return true;
+	}
+	return false;
+
+}
+
+/*
+ * Return the name of the switch found at coordinates (x,y), or 'undefined'
+ * if none is found.
+ */
+function findSwitch(x,y) {
+	x = parseInt(parseInt(x) / canvas.scale);
+	y = parseInt(parseInt(y) / canvas.scale);
+
+	for (var v in nms.switches_now.switches) {
+		if(isin(nms.switches_now.switches[v]['placement'],x,y)) {
+			return v;
+		}
+	}
+	return undefined;
+}
+
+/*
+ * Set switch color of 'sw' to 'c', then re-draw the switch.
+ */
+function setSwitchColor(sw, c)
+{
+	nms.switches_now.switches[sw]['color'] = c;
+	drawSwitch(sw);
+}
+
+/*
+ * Return a random-ish color (for testing)
+ */
+function getRandomColor()
+{
+	var i = Math.round(Math.random() * 5);
+	var colors = [ "white", "red", "pink", "yellow", "orange", "green" ];
+	return colors[i];	
+}
+
+/*
+ * Helper functions for the front-end testing.
+ */
+function hideBorder()
+{
+	c.style.border = "";
+}
+
+function showBorder()
+{
+	c.style.border = "1px solid #000000";
+}
+
+/*
+ * Event handler for the front-end drag bar to change scale
+ */
+function scaleChange()
+{
+	var scaler = document.getElementById("scaler").value;
+	canvas.scale = scaler;
+	setScale();
+}
+
+/*
+ * Draw a "cross hair" at/around (x,y).
+ *
+ * Used for testing.
+ */
+function crossHair(x,y)
+{
+	ctx.fillStyle = "yellow";
+	ctx.fillRect(x,y,-100,10);
+	ctx.fillStyle = "red";
+	ctx.fillRect(x,y,100,10);
+	ctx.fillStyle = "blue";
+	ctx.fillRect(x,y,10,-100);
+	ctx.fillStyle = "green";
+	ctx.fillRect(x,y,10,100);
+}
+
+/*
+ * Called when a switch is clicked
+ */
+function switchClick(sw)
+{
+	switchInfo(sw);
+}
+
+/*
+ * Testing-function to randomize colors of linknets and switches
+ */
+function randomizeColors()
+{
+	for (var i in nms.switches_now.linknets) {
+		setLinknetColors(i, getRandomColor(), getRandomColor());
+	}
+	drawLinknets();
+	for (var sw in nms.switches_now.switches) {
+		setSwitchColor(sw, getRandomColor());
+	}
+}
+
+function discoInit()
+{
+	setNightMode(true);
+	setLegend(1,"blue","0");	
+	setLegend(5,"red", "1");
+	setLegend(4,"yellow","2");
+	setLegend(3,"green", "3");
+	setLegend(2,"white","4");
+}
+/*
+ * Resets the colors of linknets and switches.
+ *
+ * Useful when mode changes so we don't re-use colors from previous modes
+ * due to lack of data or bugs.
+ */
+function resetColors()
+{
+	if (!nms.switches_now)
+		return;
+	if (nms.switches_now.linknets) {
+		for (var i in nms.switches_now.linknets) {
+			setLinknetColors(i, "blue","blue");
+		}
+		drawLinknets();
+	}
+	for (var sw in nms.switches_now.switches) {
+		setSwitchColor(sw, "blue");
+	}
+}
+
+/*
+ * onclick handler for the canvas
+ */
+function canvasClick(e)
+{
+	var sw = findSwitch(e.pageX - e.target.offsetLeft, e.pageY - e.target.offsetTop);
+	if (sw != undefined) {
+		switchClick(sw);
+	}
+}
+
+/*
+ * Resize event-handler.
+ *
+ * Recomputes the scale and applies it.
+ *
+ * Has to use c.offset* since we are just scaling the canvas, not
+ * everything else.
+ *
+ */
+function resizeEvent()
+{
+	var width = window.innerWidth - c.offsetLeft;
+	var height = window.innerHeight - c.offsetTop;
+	if (width / (orig.width + margin.x) > height  /  (orig.height + margin.y)) {
+		canvas.scale = height / (orig.height + margin.y);
+	} else {
+		canvas.scale = width / (orig.width + margin.x);
+	}
+	setScale();
+}
+
+/*
+ * Draws the background image (scaled).
+ */
+function drawBG()
+{
+	var image = document.getElementById('source');
+	image.style.webkitFilter = "invert(100%)";
+	ctx.drawImage(image, 0, 0, canvas.width, canvas.height);
+	if (nightMode) {
+		invertCanvas();
+	}
+}
+
+function setNightMode(toggle) {
+	nightMode = toggle;
+	var body = document.getElementById("body");
+	body.style.background = toggle ? "black" : "white";
+	body.style.color = toggle ? "#00FF00" : "black";
+	setScale();
+}
+/*
+ * Draw a box (e.g.: switch).
+ */
+function drawBox(x,y,boxw,boxh)
+{
+	var myX = Math.round(x * canvas.scale);
+	var myY = Math.round(y * canvas.scale);
+	var myX2 = Math.round((boxw) * canvas.scale);
+	var myY2 = Math.round((boxh) * canvas.scale);
+	ctx.fillRect(myX,myY, myX2, myY2);
+	ctx.lineWidth = Math.round(0.5 * canvas.scale);
+	if (canvas.scale < 1.0) {
+		ctx.lineWidth = 0.5;
+	}
+	ctx.strokeStyle = "#000000";
+	ctx.strokeRect(myX,myY, myX2, myY2);
+}
+
+/*
+ * Draw text on a box - sideways!
+ *
+ * XXX: This is pretty nasty and should also probably take a box as input.
+ */
+function drawSideways(text,x,y,w,h)
+{
+	ctx.rotate(Math.PI * 3 / 2);
+	ctx.fillStyle = "white";
+	ctx.strokeStyle = "black";
+	ctx.lineWidth = Math.round(1 * canvas.scale);
+	if (canvas.scale < 0.7) {
+		ctx.lineWidth = 0.5;
+	}
+	ctx.fillText(text, - canvas.scale * (y + h - margin.text),canvas.scale * (x + w - margin.text) );
+	ctx.strokeText(text, - canvas.scale * (y + h - margin.text),canvas.scale * (x + w - margin.text) );
+
+	ctx.rotate(Math.PI / 2);
+}
+
+/*
+ * Draw background inverted (wooo)
+ *
+ * XXX: This is broken for chromium on local file system (e.g.: file:///)
+ * Seems like a chromium bug?
+ */
+function invertCanvas() {
+	var canvas = document.getElementById('myCanvas');
+	var context = canvas.getContext('2d');
+	var canvas2 = document.getElementById('mySecretCanvas');
+	var context2 = canvas.getContext('2d');
+
+	var imageObj = document.getElementById('source');
+	context2.drawImage(imageObj, 0, 0, canvas.width, canvas.height);
+
+	var imageData = context2.getImageData(0, 0, canvas.width, canvas.height);
+	var data = imageData.data;
+
+	for(var i = 0; i < data.length; i += 4) {
+		data[i] = 255 - data[i];
+		data[i + 1] = 255 - data[i + 1];
+		data[i + 2] = 255 - data[i + 2];
+	}
+	context.putImageData(imageData, 0, 0);
+}
+
+/*
+ * Draw regular text on a box.
+ *
+ * Should take the same format as drawSideways()
+ *
+ * XXX: Both should be renamed to have 'text' or something in them
+ */
+function drawRegular(text,x,y,w,h) {
+
+	ctx.fillStyle = "white";
+	ctx.strokeStyle = "black";
+	ctx.lineWidth = Math.round(1 * canvas.scale);
+	if (canvas.scale < 0.7) {
+		ctx.lineWidth = 0.5;
+	}
+	ctx.fillText(text, (x + margin.text) * canvas.scale, (y + h - margin.text) * canvas.scale);
+	ctx.strokeText(text, (x + margin.text) * canvas.scale, (y + h - margin.text) * canvas.scale);
+}
+
+/*
+ * Draw a line between switch "insw1" and "insw2", using a gradiant going
+ * from color1 to color2.
+ *
+ * XXX: beginPath() and closePath() is needed to avoid re-using the
+ * gradient/color 
+ */
+function connectSwitches(insw1, insw2,color1, color2) {
+	var sw1 = nms.switches_now.switches[insw1].placement;
+	var sw2 = nms.switches_now.switches[insw2].placement;
+	if (color1 == undefined)
+		color1 = "blue";
+	if (color2 == undefined)
+		color2 = "blue";
+	var x0 = Math.round((sw1.x + sw1.width/2) * canvas.scale);
+	var y0 = Math.round((sw1.y + sw1.height/2) * canvas.scale);
+	var x1 = Math.round((sw2.x + sw2.width/2) * canvas.scale);
+	var y1 = Math.round((sw2.y + sw2.height/2) * canvas.scale);
+	var gradient = ctx.createLinearGradient(x1,y1,x0,y0);
+	gradient.addColorStop(0, color1);
+	gradient.addColorStop(1, color2);
+	ctx.beginPath();
+	ctx.strokeStyle = gradient;
+	ctx.moveTo(x0,y0);
+	ctx.lineTo(x1,y1); 
+	ctx.lineWidth = Math.round(2 * canvas.scale);
+	ctx.closePath();
+	ctx.stroke();
+	ctx.moveTo(0,0);
+}
+
+function debugIt(e)
+{
+	console.log("Debug triggered");
+	console.log(e);
+}
+
+window.addEventListener('resize',resizeEvent,true);
+document.addEventListener('load',resizeEvent,true);
+
-- 
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