Moved the demo scripts into a directory

assets/scripts/demo/tilemap/layer-background.toy

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+//this is one layer
+import standard;
+import engine;
+import node;
+
+
+//TODO: replace with an empty node function (polyfill)
+fn loadChildEmpty(parent: opaque) {
+	var child: opaque = loadNode("scripts:/empty.toy");
+	parent.pushNode(child);
+	return child;
+}
+
+
+fn onLoad(node: opaque) {
+	//load the child node, with the tiling back image
+	node.loadChildEmpty();
+}
+
+fn onInit(node: opaque) {
+	node.getChildNode(0).loadTexture("sprites:/tile-background.png");
+}
+
+
+//drawing util
+fn drawLayer(node: opaque, camX, camY, camW, camH, depth) {
+	//get the constants from root
+	var root: opaque = getRootNode();
+
+	var tileWidth: int const = root.callNodeFn("getTileWidth");
+	var tileHeight: int const = root.callNodeFn("getTileHeight");
+
+	var roomWidth: int const = root.callNodeFn("getRoomWidth");
+	var roomHeight: int const = root.callNodeFn("getRoomHeight");
+
+	var levelXCount: int const = root.callNodeFn("getLevelXCount");
+	var levelYCount: int const = root.callNodeFn("getLevelYCount");
+
+	//calc the modifier ratio to offset things
+	var mod: float = float tileWidth / (tileWidth - depth);
+
+	var tileWidth_mod: float = tileWidth * mod;
+	var tileHeight_mod: float = tileHeight * mod;
+	var camX_mod: float = (camX - camW) * mod + camW/2;
+	var camY_mod: float = (camY - camH) * mod + camH/2;
+
+	//calc the region to render
+	var lowerX: int = round((camX - camW/2.0) / tileWidth);
+	var upperX: int = round((camX - camW*1.5) / tileWidth);
+	var lowerY: int = round((camY - camH/2.0) / tileHeight);
+	var upperY: int = round((camY - camH*1.5) / tileHeight);
+
+	//bounds check
+	lowerX = max(0, abs(lowerX));
+	upperX = min(upperX < 0 ? abs(upperX) : 0, levelXCount * roomWidth);
+	lowerY = max(0, abs(lowerY));
+	upperY = min(upperY < 0 ? abs(upperY) : 0, levelYCount * roomHeight);
+
+	//render each tile
+	for (var j = lowerY; j <= upperY; j++) {
+		for (var i = lowerX; i <= upperX; i++) {
+			node.getChildNode(0).drawNode(round(camX_mod + i * tileWidth_mod), round(camY_mod + j * tileHeight_mod), round(tileWidth_mod), round(tileHeight_mod));
+		}
+	}
+}

assets/scripts/demo/tilemap/layer-walls.toy

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+//this is one layer
+import standard;
+import engine;
+import node;
+
+
+//TODO: replace with an empty node function (polyfill)
+fn loadChildEmpty(parent: opaque) {
+	var child: opaque = loadNode("scripts:/empty.toy");
+	parent.pushNode(child);
+	return child;
+}
+
+
+fn onLoad(node: opaque) {
+	//load the child node, with the tiling back image
+	node.loadChildEmpty();
+}
+
+fn onInit(node: opaque) {
+	node.getChildNode(0).loadTexture("sprites:/tile-wall.png");
+}
+
+
+//drawing util
+fn drawLayer(node: opaque, camX, camY, camW, camH, depth) {
+	//get the constants from root
+	var root: opaque = getRootNode();
+
+	var tileWidth: int const = root.callNodeFn("getTileWidth");
+	var tileHeight: int const = root.callNodeFn("getTileHeight");
+
+	var roomWidth: int const = root.callNodeFn("getRoomWidth");
+	var roomHeight: int const = root.callNodeFn("getRoomHeight");
+
+	var levelXCount: int const = root.callNodeFn("getLevelXCount");
+	var levelYCount: int const = root.callNodeFn("getLevelYCount");
+
+	//calc the modifier ratio to offset things
+	var mod: float = float tileWidth / (tileWidth - depth);
+
+	var tileWidth_mod: int = round(tileWidth * mod);
+	var tileHeight_mod: int = round(tileHeight * mod);
+	var camX_mod: int = round((camX - camW) * mod + camW/2);
+	var camY_mod: int = round((camY - camH) * mod + camH/2);
+
+	//calc the region to render
+	var lowerX: int = round((camX - camW/2.0) / tileWidth);
+	var upperX: int = round((camX - camW*1.5) / tileWidth);
+	var lowerY: int = round((camY - camH/2.0) / tileHeight);
+	var upperY: int = round((camY - camH*1.5) / tileHeight);
+
+	//bounds check
+	lowerX = max(0, abs(lowerX));
+	upperX = min(upperX < 0 ? abs(upperX) : 0, levelXCount * roomWidth);
+	lowerY = max(0, abs(lowerY));
+	upperY = min(upperY < 0 ? abs(upperY) : 0, levelYCount * roomHeight);
+
+	//render each tile
+	for (var j = lowerY; j <= upperY; j++) {
+		for (var i = lowerX; i <= upperX; i++) {
+			if ( !(int i % int roomWidth == 0 || int i % int roomWidth == roomWidth - 1) && !(int j % int roomHeight == 0 || int j % int roomHeight == roomHeight - 1) ) {
+				continue;
+			}
+
+			node.getChildNode(0).drawNode(camX_mod + i * tileWidth_mod, camY_mod + j * tileHeight_mod, tileWidth_mod, tileHeight_mod);
+		}
+	}
+}

assets/scripts/demo/tilemap/tilemap.toy

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+//this file manages the tilemap-related utilities
+import standard;
+import engine;
+import node;
+
+var camX: float = 0;
+var camY: float = 0;
+
+//util to generate a child node of a given parent
+fn loadChild(parent: opaque, fname: string) {
+	var child: opaque = loadNode(fname);
+	parent.pushNode(child);
+	return child;
+}
+
+fn loadLayer(node: opaque, layerName: string) {
+	//load the given layer as a child
+	var layerNode = node.loadChild("scripts:/demo/tilemap/" + layerName);
+}
+
+//lifecycle functions
+fn onStep(node: opaque) {
+	camX--;
+	camY--;
+}
+
+fn onDraw(node: opaque) {
+	var screenWidth: int const = getRootNode().callNodeFn("getScreenWidth");
+	var screenHeight: int const = getRootNode().callNodeFn("getScreenHeight");
+
+	//iterate over each layer, passing in the screen dimensions
+	for (var c = 0; c < node.getChildNodeCount(); c++) {
+		node.getChildNode(c).callNodeFn("drawLayer", camX, camY, screenWidth, screenHeight, c * 4.0);
+	}
+}