/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0
});

/**** 
* Game Code
****/ 
//[x1, y1, x2, y2, x3, y3]
// Game constants for the grid
var GRID_SIZE = 64;
var PIXEL_SIZE = 2048 / GRID_SIZE;
// Cache children array reference 
var screen = game.children;
function putPixel(x, y, color) {
	if (x >= 0 && x < GRID_SIZE && y >= 0 && y < GRID_SIZE) {
		screen[x + y * GRID_SIZE].tint = color;
	}
}
// Line drawing function using Bresenham's line algorithm
function drawLine(x0, y0, x1, y1, color) {
	var dx = x1 - x0;
	var dy = y1 - y0;
	var adx = dx < 0 ? -dx : dx;
	var ady = dy < 0 ? -dy : dy;
	var sx = dx < 0 ? -1 : 1;
	var sy = dy < 0 ? -1 : 1;
	var err = adx - ady;
	var x = x0;
	var y = y0;
	while (true) {
		putPixel(x, y, color);
		if (x === x1 && y === y1) {
			break;
		}
		var e2 = 2 * err;
		if (e2 > -ady) {
			err -= ady;
			x += sx;
		}
		if (e2 < adx) {
			err += adx;
			y += sy;
		}
	}
}
function drawTri(tri, color) {
	// Extract triangle vertices
	var x1 = tri[0];
	var y1 = tri[1];
	var x2 = tri[2];
	var y2 = tri[3];
	var x3 = tri[4];
	var y3 = tri[5];
	// Sort vertices by y (ascending)
	var verts = [{
		x: x1,
		y: y1
	}, {
		x: x2,
		y: y2
	}, {
		x: x3,
		y: y3
	}];
	verts.sort(function (a, b) {
		return a.y - b.y;
	});
	var v0 = verts[0];
	var v1 = verts[1];
	var v2 = verts[2];
	// Helper to interpolate x between two points at a given y
	function interpX(y, x0, y0, x1, y1) {
		if (y1 === y0) {
			return x0;
		}
		return x0 + (x1 - x0) * (y - y0) / (y1 - y0);
	}
	// Fill bottom flat triangle (v0, v1, v2) if v1.y != v0.y
	if (v1.y !== v0.y) {
		for (var y = Math.ceil(v0.y); y < Math.ceil(v1.y); y++) {
			var xA = interpX(y, v0.x, v0.y, v2.x, v2.y);
			var xB = interpX(y, v0.x, v0.y, v1.x, v1.y);
			var xStart = Math.ceil(Math.min(xA, xB));
			var xEnd = Math.floor(Math.max(xA, xB));
			for (var x = xStart; x <= xEnd; x++) {
				putPixel(x, y, color);
			}
		}
	}
	// Fill top flat triangle (v1, v2, v0) if v2.y != v1.y
	if (v2.y !== v1.y) {
		for (var y = Math.ceil(v1.y); y < Math.ceil(v2.y); y++) {
			var xA = interpX(y, v0.x, v0.y, v2.x, v2.y);
			var xB = interpX(y, v1.x, v1.y, v2.x, v2.y);
			var xStart = Math.ceil(Math.min(xA, xB));
			var xEnd = Math.floor(Math.max(xA, xB));
			for (var x = xStart; x <= xEnd; x++) {
				putPixel(x, y, color);
			}
		}
	}
	// Draw the three sides of the triangle
	drawLine(x1, y1, x2, y2, color); // Side 1-2
	drawLine(x2, y2, x3, y3, color); // Side 2-3
	drawLine(x3, y3, x1, y1, color); // Side 3-1
}
var colorIndex = 0;
var offset = 2732 / 2 - GRID_SIZE * PIXEL_SIZE / 2;
// Create the grid of pixels
for (var y = 0; y < GRID_SIZE; y++) {
	for (var x = 0; x < GRID_SIZE; x++) {
		// Get an instance of our pixel asset
		var pixel = LK.getAsset('pixel', {
			x: x * PIXEL_SIZE,
			y: y * PIXEL_SIZE + offset,
			tint: 0
		});
		game.addChild(pixel);
	}
}
//Start of the 3d renderer
var triangles = [[0, 0, 8, 0, 0, 8], [0, 8, 8, 0, 8, 8]];
var start = Date.now();
triangles.forEach(function (tri, i) {
	drawTri(tri, 0xFFFFFF);
});
console.log("Time: " + String(Date.now() - start));

===================================================================
--- original.js
+++ change.js
@@ -8,9 +8,8 @@
 /**** 
 * Game Code
 ****/ 
 //[x1, y1, x2, y2, x3, y3]
-var triangles = [[0, 0, 8, 0, 0, 8], [0, 8, 8, 0, 8, 8]];
 // Game constants for the grid
 var GRID_SIZE = 64;
 var PIXEL_SIZE = 2048 / GRID_SIZE;
 // Cache children array reference 
@@ -73,9 +72,11 @@
 	var v1 = verts[1];
 	var v2 = verts[2];
 	// Helper to interpolate x between two points at a given y
 	function interpX(y, x0, y0, x1, y1) {
-		if (y1 === y0) return x0;
+		if (y1 === y0) {
+			return x0;
+		}
 		return x0 + (x1 - x0) * (y - y0) / (y1 - y0);
 	}
 	// Fill bottom flat triangle (v0, v1, v2) if v1.y != v0.y
 	if (v1.y !== v0.y) {
@@ -120,8 +121,9 @@
 		game.addChild(pixel);
 	}
 }
 //Start of the 3d renderer
+var triangles = [[0, 0, 8, 0, 0, 8], [0, 8, 8, 0, 8, 8]];
 var start = Date.now();
 triangles.forEach(function (tri, i) {
 	drawTri(tri, 0xFFFFFF);
 });