incrementt = 0;

interval = setInterval( increment, 500/30);

function increment(){
	incrementt = incrementt % (Math.PI*8.8) + (Math.PI/30);
}

function drawPixels(forceTick=false) {
	// newCurrentPixels = shuffled currentPixels
	var newCurrentPixels = currentPixels.slice();
	var pixelsFirst = [];
	var pixelsLast = [];
	if (!paused || forceTick) {
		shuffleArray(newCurrentPixels);
	}
	/*{newCurrentPixels.sort(function(p) { // shuffle the pixels but keep elements[p.element].isGas last
		return 0.5 - Math.random();
	})} // shuffle the pixels if not paused*/
	for (var i = 0; i < newCurrentPixels.length; i++) {
		pixel = newCurrentPixels[i];
		//if (pixelMap[pixel.x][pixel.y] == undefined || currentPixels.indexOf(pixel) == -1) {continue}
		if (pixel.del) {continue}
		if (!paused || forceTick) {
			if (elements[pixel.element].tick) { // Run tick function if it exists
				elements[pixel.element].tick(pixel);
			}
			if (pixel.del) {continue}
			if (elements[pixel.element].behavior) { // Parse behavior if it exists
				pixelTick(pixel);
			}
		};
		if (elements[pixel.element].isGas) {
			pixelsLast.push(pixel);
		}
		else {
			pixelsFirst.push(pixel);
		}
	}
	adjacentCoords = [
		[0,1],
		[0,-1],
		[1,0],
		[-1,0]
	];
	biCoords = [
		[0,1],
		[1,0]
	];
	// Draw the current pixels
	var canvas = document.getElementById("game");
	var ctx = canvas.getContext("2d");
	var pixelDrawList = pixelsFirst.concat(pixelsLast);
	for (var i = 0; i < pixelDrawList.length; i++) {
		pixel = pixelDrawList[i];
		if (pixelMap[pixel.x][pixel.y] == undefined) {continue}
		if (view===null || view===3) {
			ctx.fillStyle = pixel.color;
		}
		else if (view === 2) { // thermal view
			// set the color to pixel.temp, from hottest at 0 hue to coldest 225 hue, with the minimum being -273, max being 6000
			var temp = pixel.temp;
			if (temp < -273) {temp = -273}
			if (temp > 6000) {temp = 6000}
			var hue = 225 - (temp/6000)*225;
			if (hue < 0) {hue = 0}
			if (hue > 225) {hue = 225}
			ctx.fillStyle = "hsl("+hue+",100%,50%)";
		}
		else if (view === 4) { // smooth view, average of surrounding pixels
			var colorlist = [];
			// check adjacent coords on the pixelMap, add the color to the list if the pixel is not empty and the color indexOf "rgb" is not -1
			for (var j = 0; j < biCoords.length; j++) {
				var x = pixel.x + biCoords[j][0];
				var y = pixel.y + biCoords[j][1];
				if (isEmpty(x,y,true) || elements[pixelMap[x][y].element].state !== elements[pixel.element].state) {continue}
				var color = pixelMap[x][y].color;
				if (color.indexOf("rgb") !== -1) {
					colorlist.push(color.match(/\d+/g));
				}
			}
			if (colorlist.length === 0) {
				ctx.fillStyle = pixel.color;
			}
			else {
				ctx.fillStyle = averageRGB(colorlist);
			}
		}
		if ((view === null || view === 4) && elements[pixel.element].state === "gas") {
                    ctx.globalAlpha = 0.66;
                        ctx.beginPath();
                        ctx.arc((pixel.x+0.5)*pixelSize+(18*Math.sin((pixel.y+incrementt)/4.4)), (pixel.y+0.5)*pixelSize+(18*Math.sin((pixel.x+incrementt)/4.4)), pixelSize*1.5, 0, 2 * Math.PI, false);
                        ctx.fill();
                    ctx.globalAlpha = 1;
		}
		else { // draw the pixel (default)
                        ctx.beginPath();
                        ctx.arc((pixel.x+0.5)*pixelSize+(18*Math.sin((pixel.y+incrementt)/4.4)), (pixel.y+0.5)*pixelSize+(18*Math.sin((pixel.x+incrementt)/4.4)), pixelSize/2, 0, 2 * Math.PI, false);
                        ctx.fill();
		}
                if (pixel.charge && view !== 2) { // Yellow glow on charge
                    if (!elements[pixel.element].colorOn) {
                        if ((view === null || view === 4) && elements[pixel.element].state === "gas") {
                            ctx.fillStyle = "rgba(255,255,0,0.5)";
                            ctx.beginPath();
                            ctx.arc((pixel.x+0.5)*pixelSize+(18*Math.sin((pixel.y+incrementt)/4.4)), (pixel.y+0.5)*pixelSize+(18*Math.sin((pixel.x+incrementt)/4.4)), pixelSize*1.5, 0, 2 * Math.PI, false);
                            ctx.fill();
                        } else {
                            ctx.fillStyle = "rgba(255,255,0,0.5)";
                            ctx.beginPath();
                            ctx.arc((pixel.x+0.5)*pixelSize+(18*Math.sin((pixel.y+incrementt)/4.4)), (pixel.y+0.5)*pixelSize+(18*Math.sin((pixel.x+incrementt)/4.4)), pixelSize/2, 0, 2 * Math.PI, false);
                            ctx.fill();
                        }
                    }
                }
	}
	if ((!paused) || forceTick) {pixelTicks++};
}
