added resource loader

src/DataTypes/Queue.ts

@@ -4,13 +4,15 @@ export default class Queue<T> implements Collection{
 	private readonly MAX_ELEMENTS: number;
 	private q: Array<T>;
 	private head: number;
-	private tail: number;
+    private tail: number;
+    private size: number;
 
     constructor(maxElements: number = 100){
         this.MAX_ELEMENTS = maxElements;
         this.q = new Array(this.MAX_ELEMENTS);
         this.head = 0;
         this.tail = 0;
+        this.size = 0;
     }
 
     enqueue(item: T): void{
@@ -18,6 +20,7 @@ export default class Queue<T> implements Collection{
             throw "Queue full - cannot add element"
         }
 
+        this.size += 1;
         this.q[this.tail] = item;
         this.tail = (this.tail + 1) % this.MAX_ELEMENTS;
     }
@@ -27,6 +30,8 @@ export default class Queue<T> implements Collection{
             throw "Queue empty - cannot remove element"
         }
 
+
+        this.size -= 1;
         let item = this.q[this.head];
         this.head = (this.head + 1) % this.MAX_ELEMENTS;
         
@@ -47,7 +52,13 @@ export default class Queue<T> implements Collection{
         return this.head !== this.tail;
     }
 
+    getSize(): number {
+        return this.size;
+    }
+
+    // TODO: This should actually delete the items in the queue instead of leaving them here
     clear(): void {
+        this.size = 0;
         this.head = this.tail;
     }
 

src/DataTypes/Tilesets/TileLayer.ts

@@ -0,0 +1,5 @@
+export default class TileLayer {
+	public data: Array<number>;
+	public collidable: boolean;
+	public visible: boolean;
+}

src/GameState/Factories/TilemapFactory.ts

@@ -1,45 +0,0 @@
-import Scene from "../Scene";
-import Viewport from "../../SceneGraph/Viewport";
-import Tilemap from "../../Nodes/Tilemap"
-import ResourceManager from "../../ResourceManager/ResourceManager";
-import { TiledTilemapData } from "../../DataTypes/Tilesets/TiledData";
-import StringUtils from "../../Utils/StringUtils";
-import StaticBody from "../../Physics/StaticBody";
-import Vec2 from "../../DataTypes/Vec2";
-
-export default class TilemapFactory {
-    private scene: Scene;
-    // TODO: get the resource manager OUT of here, it does not belong
-    private resourceManager: ResourceManager;
-
-	constructor(scene: Scene){
-        this.scene = scene;
-        this.resourceManager = ResourceManager.getInstance();
-	}
-
-	add<T extends Tilemap>(constr: new (...a: any) => T, path: string, ...args: any): void {
-        this.resourceManager.loadTilemap(path, (tilemapData: TiledTilemapData) => {
-            // For each of the layers in the tilemap, create a tilemap
-            for(let layer of tilemapData.layers){
-                let tilemap = new constr(tilemapData, layer);
-                tilemap.init(this.scene);
-
-                // Add to scene
-                this.scene.addTilemap(tilemap);
-
-                if(tilemap.isCollidable()){
-                    // Register in physics as a tilemap
-                    this.scene.physics.addTilemap(tilemap);
-                }
-
-                // Load images for the tilesets
-                tilemap.getTilesets().forEach(tileset => {
-                    let imagePath = StringUtils.getPathFromFilePath(path) + tileset.getImageUrl();
-                    this.resourceManager.loadImage(imagePath, (path: string, image: HTMLImageElement) => {
-                        tileset.setImage(image);
-                    })
-                });
-            }
-        });
-	}
-}

src/GameState/GameState.ts

@@ -1,45 +0,0 @@
-import Stack from "../DataTypes/Stack";
-import Scene from "./Scene";
-import Viewport from "../SceneGraph/Viewport";
-import Vec2 from "../DataTypes/Vec2";
-
-export default class GameState{
-    private sceneStack: Stack<Scene>;
-    private worldSize: Vec2;
-    private viewport: Viewport;
-
-    constructor(viewport: Viewport){
-        this.sceneStack = new Stack(10);
-        this.worldSize = new Vec2(1600, 1000);
-        this.viewport = viewport;
-        this.viewport.setBounds(0, 0, 2560, 1280);
-    }
-
-    createScene(): Scene{
-        let scene = new Scene(this.viewport, this);
-        this.addScene(scene);
-        return scene;
-    }
-
-    addScene(scene: Scene): void {
-        this.sceneStack.push(scene);
-    }
-
-    removeScene(startNewTopScene: boolean = true): void {
-        this.sceneStack.pop();
-        this.sceneStack.peek().setPaused(!startNewTopScene);
-    }
-
-    changeScene(scene: Scene): void {
-        this.sceneStack.clear();
-        this.sceneStack.push(scene);
-    }
-
-    update(deltaT: number): void {
-        this.sceneStack.forEach((scene: Scene) => scene.update(deltaT));
-    }
-
-    render(ctx: CanvasRenderingContext2D): void {
-        this.sceneStack.forEach((scene: Scene) => scene.render(ctx));
-    }
-}

src/Loop/GameLoop.ts

@@ -2,10 +2,10 @@ import EventQueue from "../Events/EventQueue";
 import InputReceiver from "../Input/InputReceiver";
 import InputHandler from "../Input/InputHandler";
 import Recorder from "../Playback/Recorder";
-import GameState from "../GameState/GameState";
 import Debug from "../Debug/Debug";
 import ResourceManager from "../ResourceManager/ResourceManager";
 import Viewport from "../SceneGraph/Viewport";
+import SceneManager from "../Scene/SceneManager";
 
 export default class GameLoop{
 	// The amount of time to spend on a physics step
@@ -37,8 +37,8 @@ export default class GameLoop{
 	private inputHandler: InputHandler;
 	private inputReceiver: InputReceiver;
 	private recorder: Recorder;
-    private gameState: GameState;
     private resourceManager: ResourceManager;
+    private sceneManager: SceneManager;
 
     constructor(){
         this.maxFPS = 60;
@@ -66,8 +66,8 @@ export default class GameLoop{
         this.inputReceiver = InputReceiver.getInstance();
         this.inputReceiver.setViewport(this.viewport);
         this.recorder = new Recorder();
-        this.gameState = new GameState(this.viewport);
         this.resourceManager = ResourceManager.getInstance();
+        this.sceneManager = new SceneManager(this.viewport);
     }
 
     private initializeCanvas(canvas: HTMLCanvasElement, width: number, height: number): CanvasRenderingContext2D {
@@ -83,8 +83,8 @@ export default class GameLoop{
         this.simulationTimestep = Math.floor(1000/this.maxFPS);
     }
 
-    getGameState(): GameState {
+    getSceneManager(): SceneManager {
-        return this.gameState;
+        return this.sceneManager;
     }
 
     private updateFrameCount(timestep: number): void {
@@ -149,12 +149,12 @@ export default class GameLoop{
         this.eventQueue.update(deltaT);
         this.inputReceiver.update(deltaT);
         this.recorder.update(deltaT);
-        this.gameState.update(deltaT);
+        this.sceneManager.update(deltaT);
     }
 
     render(): void {
         this.ctx.clearRect(0, 0, this.WIDTH, this.HEIGHT);
-        this.gameState.render(this.ctx);
+        this.sceneManager.render(this.ctx);
         Debug.render(this.ctx);
     }
 }

src/Nodes/CanvasNode.ts

@@ -1,6 +1,6 @@
 import GameNode from "./GameNode";
 import Vec2 from "../DataTypes/Vec2";
-import Scene from "../GameState/Scene";
+import Layer from "../Scene/Layer";
 
 export default abstract class CanvasNode extends GameNode{
 	protected size: Vec2;

src/Nodes/GameNode.ts

@@ -4,14 +4,14 @@ import Vec2 from "../DataTypes/Vec2";
 import Map from "../DataTypes/Map";
 import Receiver from "../Events/Receiver";
 import GameEvent from "../Events/GameEvent";
-import Scene from "../GameState/Scene";
+import Layer from "../Scene/Layer";
 
 export default abstract class GameNode{
 	private eventQueue: EventQueue;
 	protected input: InputReceiver;
 	protected position: Vec2;
 	private receiver: Receiver;
-	protected scene: Scene;
+	protected scene: Layer;
 
 	constructor(){
 		this.eventQueue = EventQueue.getInstance();
@@ -19,11 +19,11 @@ export default abstract class GameNode{
 		this.position = new Vec2(0, 0);
 	}
 
-	init(scene: Scene){
+	init(scene: Layer){
 		this.scene = scene;
 	}
 
-	getScene(): Scene {
+	getScene(): Layer {
 		return this.scene;
 	}
 	

src/Nodes/Tilemap.ts

@@ -2,38 +2,28 @@ import Vec2 from "../DataTypes/Vec2";
 import GameNode from "./GameNode";
 import Tileset from "../DataTypes/Tilesets/Tileset";
 import { TiledTilemapData, TiledLayerData } from "../DataTypes/Tilesets/TiledData"
+import TileLayer from "../DataTypes/Tilesets/TileLayer";
 
 /**
  * Represents one layer of tiles
  */
 export default abstract class Tilemap extends GameNode {
-    protected data: number[];
+    protected tilesets: Array<Tileset>;
-    protected collisionData: number[];
-    protected tilesets: Tileset[];
     protected worldSize: Vec2;
     protected tileSize: Vec2;
-    protected visible: boolean;
-    protected collidable: boolean;
     protected scale: Vec2;
+    protected layers: Array<TileLayer>;
 
     // TODO: Make this no longer be specific to Tiled
-    constructor(tilemapData: TiledTilemapData, layerData: TiledLayerData) {
+    constructor(tilemapData: TiledTilemapData) {
         super();
         this.tilesets = new Array<Tileset>();
         this.worldSize = new Vec2(0, 0);
         this.tileSize = new Vec2(0, 0);
-        this.parseTilemapData(tilemapData, layerData);
+        this.parseTilemapData(tilemapData);
         this.scale = new Vec2(4, 4);
     }
 
-    isCollidable(): boolean {
-        return this.collidable;
-    }
-
-    isVisible(): boolean {
-        return this.visible;
-    }
-
     getTilesets(): Tileset[] {
         return this.tilesets;
     }
@@ -56,24 +46,11 @@ export default abstract class Tilemap extends GameNode {
 
     abstract getTileAt(worldCoords: Vec2): number;
 
-    isReady(): boolean {
-        if(this.tilesets.length !== 0){
-            for(let tileset of this.tilesets){
-                if(!tileset.isReady()){
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-
-    abstract forEachTile(func: Function): void;
-
     /**
      * Sets up the tileset using the data loaded from file
      */
     // TODO: This shouldn't use tiled data specifically - it should be more general
-    protected abstract parseTilemapData(tilemapData: TiledTilemapData, layerData: TiledLayerData): void;
+    protected abstract parseTilemapData(tilemapData: TiledTilemapData): void;
 
     abstract render(ctx: CanvasRenderingContext2D, origin: Vec2, viewportSize: Vec2): void;
 }

src/Nodes/Tilemaps/OrthogonalTilemap.ts

@@ -2,27 +2,33 @@ import Tilemap from "../Tilemap";
 import Vec2 from "../../DataTypes/Vec2";
 import { TiledTilemapData, TiledLayerData } from "../../DataTypes/Tilesets/TiledData";
 import Tileset from "../../DataTypes/Tilesets/Tileset";
+import TileLayer from "../../DataTypes/Tilesets/TileLayer";
 
 
 export default class OrthogonalTilemap extends Tilemap {
 
-    protected parseTilemapData(tilemapData: TiledTilemapData, layer: TiledLayerData): void {
+    protected parseTilemapData(tilemapData: TiledTilemapData): void {
         this.worldSize.set(tilemapData.width, tilemapData.height);
         this.tileSize.set(tilemapData.tilewidth, tilemapData.tileheight);
-        this.data = layer.data;
+        for(let layerData of tilemapData.layers){
-        this.collisionData = this.data.map(tile => tile !== 0 ? 1 : 0);
+            let layer = new TileLayer();
-        this.visible = layer.visible;
+            layer.data = layer.data;
-        this.collidable = false;
+            layer.visible = layer.visible;
-        if(layer.properties){
+            layer.collidable = false;
-            for(let item of layer.properties){
+            if(layerData.properties){
-                if(item.name === "Collidable"){
+                for(let item of layerData.properties){
-                    this.collidable = item.value;
+                    if(item.name === "Collidable"){
+                        layer.collidable = item.value;
+                    }
                 }
             }
+            this.layers.push(layer);
         }
+
         tilemapData.tilesets.forEach(tilesetData => this.tilesets.push(new Tileset(tilesetData)));
     }
 
+    // TODO - Should this even work as it currently does? The layers make things more complicated
     getTileAt(worldCoords: Vec2): number {
         let localCoords = this.getColRowAt(worldCoords);
         if(localCoords.x < 0 || localCoords.x >= this.worldSize.x || localCoords.y < 0 || localCoords.y >= this.worldSize.y){
@@ -30,23 +36,39 @@ export default class OrthogonalTilemap extends Tilemap {
             return 0;
         }
 
-        return this.data[localCoords.y * this.worldSize.x + localCoords.x];
+        // Return the top nonzero tile
+        let tile = 0;
+        for(let layer of this.layers){
+            if(layer.data[localCoords.y * this.worldSize.x + localCoords.x] !== 0){
+                tile = layer.data[localCoords.y * this.worldSize.x + localCoords.x];
+            }
+        }
+        return tile;
     }
 
     isTileCollidable(indexOrCol: number, row?: number): boolean {
+        let index = 0;
         if(row){
             if(indexOrCol < 0 || indexOrCol >= this.worldSize.x || row < 0 || row >= this.worldSize.y){
                 // There are no tiles in negative positions or out of bounds positions
                 return false;
             }
-            return this.collisionData[row * this.worldSize.x + indexOrCol] === 1 && this.collidable;
+            index = row * this.worldSize.x + indexOrCol;
         } else {
-            if(indexOrCol < 0 || indexOrCol >= this.collisionData.length){
+            if(indexOrCol < 0 || indexOrCol >= this.layers[0].data.length){
                 // Tiles that don't exist aren't collidable
                 return false;
             }
-            return this.collisionData[indexOrCol] === 1 && this.collidable;
+            index = indexOrCol;
         }
+
+        for(let layer of this.layers){
+            if(layer.data[index] !== 0 && layer.collidable){
+                return true;
+            }
+        }
+
+        return false;
     }
 
     // TODO: Should this throw an error if someone tries to access an out of bounds value?
@@ -56,22 +78,20 @@ export default class OrthogonalTilemap extends Tilemap {
         return new Vec2(col, row);
     }
 
-    forEachTile(func: Function): void {
-        for(let i = 0; i < this.data.length; i++){
-            func(this.data[i], i);
-        }
-    }
-
     update(deltaT: number): void {}
 
     // TODO: Don't render tiles that aren't on screen
     render(ctx: CanvasRenderingContext2D, origin: Vec2, viewportSize: Vec2) {
-        for(let i = 0; i < this.data.length; i++){
+        for(let layer of this.layers){
-            let tileIndex = this.data[i];
+            if(layer.visible){
+                for(let i = 0; i < layer.data.length; i++){
+                    let tileIndex = layer.data[i];
 
-            for(let tileset of this.tilesets){
+                    for(let tileset of this.tilesets){
-                if(tileset.hasTile(tileIndex)){
+                        if(tileset.hasTile(tileIndex)){
-                    tileset.renderTile(ctx, tileIndex, i, this.worldSize, origin, this.scale);
+                            tileset.renderTile(ctx, tileIndex, i, this.worldSize, origin, this.scale);
+                        }
+                    }
                 }
             }
         }

src/ResourceManager/ResourceManager.ts

@@ -1,7 +1,37 @@
+import Map from "../DataTypes/Map";
+import Tilemap from "../Nodes/Tilemap";
+import Queue from "../DataTypes/Queue";
+import { TiledTilemapData } from "../DataTypes/Tilesets/TiledData";
+import StringUtils from "../Utils/StringUtils";
+
 export default class ResourceManager {
     private static instance: ResourceManager;
     
-    private constructor(){};
+    private loading: boolean;
+
+    private imagesLoaded: number;
+    private imagesToLoad: number;
+    private imageLoadingQueue: Queue<{key: string, path: string}>;
+    private images: Map<HTMLImageElement>;
+
+    private tilemapsLoaded: number;
+    private tilemapsToLoad: number;
+    private tilemapLoadingQueue: Queue<{key: string, path: string}>;
+    private tilemaps: Map<TiledTilemapData>;
+
+    private constructor(){
+        this.loading = false;
+
+        this.imagesLoaded = 0;
+        this.imagesToLoad = 0;
+        this.imageLoadingQueue = new Queue();
+        this.images = new Map();
+
+        this.tilemapsLoaded = 0;
+        this.tilemapsToLoad = 0;
+        this.tilemapLoadingQueue = new Queue();
+        this.tilemaps = new Map();
+    };
 
     static getInstance(): ResourceManager {
         if(!this.instance){
@@ -11,11 +41,128 @@ export default class ResourceManager {
         return this.instance;
     }
 
-    public loadTilemap(pathToTilemapJSON: string, callback: Function): void {
+    public image(key: string, path: string): void {
-        this.loadTextFile(pathToTilemapJSON, (fileText: string) => {
+        this.imageLoadingQueue.enqueue({key: key, path: path});
-            let tilemapObject = JSON.parse(fileText);
+    }
-            callback(tilemapObject);
+
+    public spritesheet(key: string, path: string, frames: {hFrames: number, vFrames: number}): void {
+
+    }
+
+    public audio(key: string, path: string): void {
+
+    }
+
+    // This one is trickier than the others because we first have to load the json file, then we have to load the images
+    public tilemap(key: string, path: string): void {
+        // Add a function that loads the tilemap to the queue
+        this.tilemapLoadingQueue.enqueue({key: key, path: path});
+
+        // this.tilemapLoadingQueue.enqueue((callback: Function) => {
+        //     this.loadTilemap(path, (tilemapData: TiledTilemapData) => {
+        //         // When the tilemap file loads, first construct the tilemap
+        //         // TODO: Ignore multiple layers for now, but this will have to be elegantly dealt with sometime in the future
+
+        //         // Count the total number of images that need to be loaded
+                
+        //         let tilemap = new constr(tilemapData);
+        //         // For each of the tilesets in the tilemap, load the image
+        //         tilemap.getTilesets().forEach(tileset => {
+        //             let imagePath = StringUtils.getPathFromFilePath(path) + tileset.getImageUrl();
+        //             this.loadImage(imagePath, (image: HTMLImageElement) => {
+        //                 tileset.setImage(image);
+        //             })
+        //         });
+
+        //         this.tilemaps.add(key, tilemap);
+        //     });
+        // });
+    }
+
+    loadResourcesFromQueue(callback: Function): void {
+        this.loading = true;
+
+        // Load everything in the queues. Tilemaps have to come before images because they will add new images to the queue
+        this.loadTilemapsFromQueue(() => {
+            this.loadImagesFromQueue(() => {
+                // Done loading
+                this.loading = false;
+                callback();
+            });
         });
+
+    }
+
+    private loadTilemapsFromQueue(onFinishLoading: Function){
+        this.tilemapsToLoad = this.tilemapLoadingQueue.getSize();
+        this.tilemapsLoaded = 0;
+
+        while(this.tilemapLoadingQueue.hasItems()){
+            let tilemap = this.tilemapLoadingQueue.dequeue();
+            this.loadTilemap(tilemap.key, tilemap.path, onFinishLoading);
+        }
+    }
+
+    private loadTilemap(key: string, pathToTilemapJSON: string, callbackIfLast: Function): void {
+        this.loadTextFile(pathToTilemapJSON, (fileText: string) => {
+            let tilemapObject = <TiledTilemapData>JSON.parse(fileText);
+            
+            // We can parse the object later - it's much faster than loading
+            this.tilemaps.add(key, tilemapObject);
+
+            // Grab the tileset images we need to load and add them to the imageloading queue
+            for(let tileset of tilemapObject.tilesets){
+                let key = tileset.image;
+                let path = StringUtils.getPathFromFilePath(pathToTilemapJSON) + key;
+                this.imageLoadingQueue.enqueue({key: key, path: path});
+            }
+
+            // Finish loading
+            this.finishLoadingTilemap(callbackIfLast);
+        });
+    }
+
+    private finishLoadingTilemap(callback: Function){
+        this.tilemapsLoaded += 1;
+
+        if(this.tilemapsLoaded === this.tilemapsToLoad){
+            // We're done loading tilemaps
+            callback();
+        }
+    }
+
+    private loadImagesFromQueue(onFinishLoading: Function): void {
+        this.imagesToLoad = this.imageLoadingQueue.getSize();
+        this.tilemapsLoaded = 0;
+
+        while(this.imageLoadingQueue.hasItems()){
+            let image = this.imageLoadingQueue.dequeue();
+            this.loadImage(image.key, image.path, onFinishLoading);
+        }
+    }
+
+    // TODO: When you switch to WebGL, make sure to make this private and make a "loadTexture" function
+    public loadImage(key: string, path: string, callbackIfLast: Function): void {
+        var image = new Image();
+
+        image.onload = () => {
+            // Add to loaded images
+            this.images.add(key, image);
+
+            // Finish image load
+            this.finishLoadingImage(callbackIfLast);
+        }
+
+        image.src = path;
+    }
+
+    private finishLoadingImage(callback: Function): void {
+        this.imagesLoaded += 1;
+
+        if(this.imagesLoaded === this.imagesToLoad ){
+            // We're done loading tilemaps
+            callback();
+        }
     }
 
     private loadTextFile(textFilePath: string, callback: Function): void {
@@ -29,15 +176,4 @@ export default class ResourceManager {
         };
         xobj.send(null);
     }
-
-    // TODO: When you switch to WebGL, make sure to make this private and make a "loadTexture" function
-    public loadImage(path: string, callback: Function): void {
-        var image = new Image();
-
-        image.onload = function () {
-            callback(path, image);
-        }
-
-        image.src = path;
-    }
 }

src/Scene/Factories/CanvasNodeFactory.ts

@@ -1,11 +1,11 @@
-import Scene from "../Scene";
+import Layer from "../Layer";
 import Viewport from "../../SceneGraph/Viewport";
 import CanvasItem from "../../Nodes/CanvasNode"
 
 export default class CanvasNodeFactory {
-	private scene: Scene;
+	private scene: Layer;
 
-	constructor(scene: Scene){
+	constructor(scene: Layer){
 		this.scene = scene;
 	}
 

src/Scene/Factories/PhysicsNodeFactory.ts

@@ -1,14 +1,14 @@
-import Scene from "../Scene";
+import Layer from "../Layer";
 import Viewport from "../../SceneGraph/Viewport";
 import PhysicsNode from "../../Physics/PhysicsNode";
 import PhysicsManager from "../../Physics/PhysicsManager";
 import Tilemap from "../../Nodes/Tilemap";
 
 export default class PhysicsNodeFactory {
-	private scene: Scene;
+	private scene: Layer;
 	private physicsManager: PhysicsManager;
 
-	constructor(scene: Scene, physicsManager: PhysicsManager){
+	constructor(scene: Layer, physicsManager: PhysicsManager){
         this.scene = scene;
         this.physicsManager = physicsManager;
 	}

src/Scene/Factories/TilemapFactory.ts

@@ -0,0 +1,45 @@
+import Layer from "../Layer";
+import Viewport from "../../SceneGraph/Viewport";
+import Tilemap from "../../Nodes/Tilemap";
+import ResourceManager from "../../ResourceManager/ResourceManager";
+import { TiledTilemapData } from "../../DataTypes/Tilesets/TiledData";
+import StringUtils from "../../Utils/StringUtils";
+import StaticBody from "../../Physics/StaticBody";
+import Vec2 from "../../DataTypes/Vec2";
+
+export default class TilemapFactory {
+    private scene: Layer;
+    // TODO: get the resource manager OUT of here, it does not belong
+    private resourceManager: ResourceManager;
+
+	constructor(scene: Layer){
+        this.scene = scene;
+        this.resourceManager = ResourceManager.getInstance();
+	}
+
+	add<T extends Tilemap>(constr: new (...a: any) => T, path: string, ...args: any): void {
+        // this.resourceManager.loadTilemap(path, (tilemapData: TiledTilemapData) => {
+        //     // For each of the layers in the tilemap, create a tilemap
+        //     for(let layer of tilemapData.layers){
+        //         let tilemap = new constr(tilemapData, layer);
+        //         tilemap.init(this.scene);
+
+        //         // Add to scene
+        //         this.scene.addTilemap(tilemap);
+
+        //         if(tilemap.isCollidable()){
+        //             // Register in physics as a tilemap
+        //             this.scene.physics.addTilemap(tilemap);
+        //         }
+
+        //         // Load images for the tilesets
+        //         tilemap.getTilesets().forEach(tileset => {
+        //             let imagePath = StringUtils.getPathFromFilePath(path) + tileset.getImageUrl();
+        //             this.resourceManager.loadImage(imagePath, (path: string, image: HTMLImageElement) => {
+        //                 tileset.setImage(image);
+        //             })
+        //         });
+        //     }
+        // });
+	}
+}

src/Scene/Layer.ts

@@ -4,15 +4,15 @@ import SceneGraph from "../SceneGraph/SceneGraph";
 import SceneGraphArray from "../SceneGraph/SceneGraphArray";
 import CanvasNode from "../Nodes/CanvasNode";
 import CanvasNodeFactory from "./Factories/CanvasNodeFactory";
-import GameState from "./GameState";
+import Scene from "./Scene";
 import Tilemap from "../Nodes/Tilemap";
 import TilemapFactory from "./Factories/TilemapFactory";
 import PhysicsManager from "../Physics/PhysicsManager";
 import PhysicsNodeFactory from "./Factories/PhysicsNodeFactory";
 import MathUtils from "../Utils/MathUtils";
 
-export default class Scene {
+export default class Layer {
-    private gameState: GameState;
+    private gameState: Scene;
     private viewport: Viewport
     private parallax: Vec2;
     private sceneGraph: SceneGraph;
@@ -27,7 +27,7 @@ export default class Scene {
     public tilemap: TilemapFactory;
     public physics: PhysicsNodeFactory;
 
-    constructor(viewport: Viewport, gameState: GameState){
+    constructor(viewport: Viewport, gameState: Scene){
         this.gameState = gameState;
         this.viewport = viewport;
         this.parallax = new Vec2(1, 1);
@@ -114,9 +114,7 @@ export default class Scene {
 
             // Render tilemaps
             this.tilemaps.forEach(tilemap => {
-                if(tilemap.isReady() && tilemap.isVisible()){
+                tilemap.render(ctx, origin, size);
-                    tilemap.render(ctx, origin, size);
-                }
             });
 
             // Render visible set

src/Scene/Scene.ts

@@ -0,0 +1,41 @@
+import Stack from "../DataTypes/Stack";
+import Layer from "./Layer";
+import Viewport from "../SceneGraph/Viewport";
+import Vec2 from "../DataTypes/Vec2";
+
+export default class Scene{
+    private layers: Stack<Layer>;
+    private worldSize: Vec2;
+    private viewport: Viewport;
+    private running: boolean;
+
+    constructor(viewport: Viewport){
+        this.layers = new Stack(10);
+        this.worldSize = new Vec2(1600, 1000);
+        this.viewport = viewport;
+        this.viewport.setBounds(0, 0, 2560, 1280);
+        this.running = false;
+    }
+
+    loadScene(): void {}
+
+    unloadScene(): void {}
+
+    setRunning(running: boolean): void {
+        this.running = running;
+    }
+
+    isRunning(): boolean {
+        return this.isRunning();
+    }
+
+    start(){}
+
+    update(deltaT: number): void {
+        this.layers.forEach((scene: Layer) => scene.update(deltaT));
+    }
+
+    render(ctx: CanvasRenderingContext2D): void {
+        this.layers.forEach((scene: Layer) => scene.render(ctx));
+    }
+}

src/Scene/SceneManager.ts

@@ -0,0 +1,39 @@
+import Scene from "./Scene";
+import ResourceManager from "../ResourceManager/ResourceManager";
+import Viewport from "../SceneGraph/Viewport";
+
+export default class SceneManager{
+
+	private currentScene: Scene;
+	private viewport: Viewport;
+	private resourceManager: ResourceManager;
+
+	constructor(viewport: Viewport){
+		this.resourceManager = ResourceManager.getInstance();
+		this.viewport = viewport;
+	}
+
+	public addScene<T extends Scene>(constr: new (...args: any) => T){
+		let scene = new constr(this.viewport);
+		this.currentScene = scene;
+
+		// Enqueue all scene asset loads
+		scene.loadScene();
+
+		// Load all assets
+		this.resourceManager.loadResourcesFromQueue(() => {
+			scene.start();
+			scene.setRunning(true);
+		})
+	}
+
+	public render(ctx: CanvasRenderingContext2D){
+		this.currentScene.render(ctx);
+	}
+
+	public update(deltaT: number){
+		if(this.currentScene.isRunning()){
+			this.currentScene.update(deltaT);
+		}
+	}
+}

src/SceneGraph/SceneGraph.ts

@@ -2,15 +2,15 @@ import Viewport from "./Viewport";
 import CanvasNode from "../Nodes/CanvasNode";
 import Map from "../DataTypes/Map";
 import Vec2 from "../DataTypes/Vec2";
-import Scene from "../GameState/Scene";
+import Layer from "../Scene/Layer";
 
 export default abstract class SceneGraph{
 	protected viewport: Viewport;
 	protected nodeMap: Map<CanvasNode>;
 	protected idCounter: number;
-	protected scene: Scene;
+	protected scene: Layer;
 
-    constructor(viewport: Viewport, scene: Scene){
+    constructor(viewport: Viewport, scene: Layer){
 		this.viewport = viewport;
 		this.scene = scene;
 		this.nodeMap = new Map<CanvasNode>();

src/SceneGraph/SceneGraphArray.ts

@@ -1,13 +1,13 @@
 import SceneGraph from "./SceneGraph";
 import CanvasNode from "../Nodes/CanvasNode";
 import Viewport from "./Viewport";
-import Scene from "../GameState/Scene";
+import Layer from "../Scene/Layer";
 
 export default class SceneGraphArray extends SceneGraph{
 	private nodeList: Array<CanvasNode>;
     private turnOffViewportCulling_demoTool: boolean;
 
-    constructor(viewport: Viewport, scene: Scene){
+    constructor(viewport: Viewport, scene: Layer){
         super(viewport, scene);
 
         this.nodeList = new Array<CanvasNode>();

src/main.ts

@@ -9,80 +9,80 @@ import OrthogonalTilemap from "./Nodes/Tilemaps/OrthogonalTilemap";
 function main(){
     // Create the game object
     let game = new GameLoop();
-    let gameState = game.getGameState();
+    let gameState = game.getSceneManager();
 
-    let backgroundScene = gameState.createScene();
+    // let backgroundScene = gameState.createScene();
-    backgroundScene.setParallax(0.5, 0.8);
+    // backgroundScene.setParallax(0.5, 0.8);
-    backgroundScene.setAlpha(0.5);
+    // backgroundScene.setAlpha(0.5);
-    let mainScene = gameState.createScene();
+    // let mainScene = gameState.createScene();
-    let uiLayer = gameState.createScene();
+    // let uiLayer = gameState.createScene();
-    uiLayer.setParallax(0, 0);
+    // uiLayer.setParallax(0, 0);
-    let pauseMenu = gameState.createScene();
+    // let pauseMenu = gameState.createScene();
-    pauseMenu.setParallax(0, 0);
+    // pauseMenu.setParallax(0, 0);
 
-    // Initialize GameObjects
+    // // Initialize GameObjects
-    let recordButton = uiLayer.canvasNode.add(Button);
+    // let recordButton = uiLayer.canvasNode.add(Button);
-    recordButton.setSize(100, 50);
+    // recordButton.setSize(100, 50);
-    recordButton.setText("Record");
+    // recordButton.setText("Record");
-    recordButton.setPosition(400, 30);
+    // recordButton.setPosition(400, 30);
-    recordButton.onClickEventId = "record_button_press";
+    // recordButton.onClickEventId = "record_button_press";
 
-    let stopButton = uiLayer.canvasNode.add(Button);
+    // let stopButton = uiLayer.canvasNode.add(Button);
-    stopButton.setSize(100, 50);
+    // stopButton.setSize(100, 50);
-    stopButton.setText("Stop");
+    // stopButton.setText("Stop");
-    stopButton.setPosition(550, 30);
+    // stopButton.setPosition(550, 30);
-    stopButton.onClickEventId = "stop_button_press";
+    // stopButton.onClickEventId = "stop_button_press";
 
-    let playButton = uiLayer.canvasNode.add(Button);
+    // let playButton = uiLayer.canvasNode.add(Button);
-    playButton.setSize(100, 50);
+    // playButton.setSize(100, 50);
-    playButton.setText("Play");
+    // playButton.setText("Play");
-    playButton.setPosition(700, 30);
+    // playButton.setPosition(700, 30);
-    playButton.onClickEventId = "play_button_press";
+    // playButton.onClickEventId = "play_button_press";
 
-    let cycleFramerateButton = uiLayer.canvasNode.add(Button);
+    // let cycleFramerateButton = uiLayer.canvasNode.add(Button);
-    cycleFramerateButton.setSize(150, 50);
+    // cycleFramerateButton.setSize(150, 50);
-    cycleFramerateButton.setText("Cycle FPS");
+    // cycleFramerateButton.setText("Cycle FPS");
-    cycleFramerateButton.setPosition(5, 400);
+    // cycleFramerateButton.setPosition(5, 400);
-    let i = 0;
+    // let i = 0;
-    let fps = [15, 30, 60];
+    // let fps = [15, 30, 60];
-    cycleFramerateButton.onClick = () => {
+    // cycleFramerateButton.onClick = () => {
-        game.setMaxFPS(fps[i]);
+    //     game.setMaxFPS(fps[i]);
-        i = (i + 1) % 3;
+    //     i = (i + 1) % 3;
-    }
+    // }
 
-    let pauseButton = uiLayer.canvasNode.add(Button);
+    // let pauseButton = uiLayer.canvasNode.add(Button);
-    pauseButton.setSize(100, 50);
+    // pauseButton.setSize(100, 50);
-    pauseButton.setText("Pause");
+    // pauseButton.setText("Pause");
-    pauseButton.setPosition(700, 400);
+    // pauseButton.setPosition(700, 400);
-    pauseButton.onClick = () => {
+    // pauseButton.onClick = () => {
-        mainScene.setPaused(true);
+    //     mainScene.setPaused(true);
-        pauseMenu.enable();
+    //     pauseMenu.enable();
-    }
+    // }
 
-    let modalBackground = pauseMenu.canvasNode.add(UIElement);
+    // let modalBackground = pauseMenu.canvasNode.add(UIElement);
-    modalBackground.setSize(400, 200);
+    // modalBackground.setSize(400, 200);
-    modalBackground.setBackgroundColor(new Color(0, 0, 0, 0.4));
+    // modalBackground.setBackgroundColor(new Color(0, 0, 0, 0.4));
-    modalBackground.setPosition(200, 100);
+    // modalBackground.setPosition(200, 100);
 
-    let resumeButton = pauseMenu.canvasNode.add(Button);
+    // let resumeButton = pauseMenu.canvasNode.add(Button);
-    resumeButton.setSize(100, 50);
+    // resumeButton.setSize(100, 50);
-    resumeButton.setText("Resume");
+    // resumeButton.setText("Resume");
-    resumeButton.setPosition(400, 200);
+    // resumeButton.setPosition(400, 200);
-    resumeButton.onClick = () => {
+    // resumeButton.onClick = () => {
-        mainScene.setPaused(false);
+    //     mainScene.setPaused(false);
-        pauseMenu.disable();
+    //     pauseMenu.disable();
-    }
+    // }
 
-    backgroundScene.tilemap.add(OrthogonalTilemap, "assets/tilemaps/Background.json");
+    // backgroundScene.tilemap.add(OrthogonalTilemap, "assets/tilemaps/Background.json");
-    mainScene.tilemap.add(OrthogonalTilemap, "assets/tilemaps/Platformer.json");
+    // mainScene.tilemap.add(OrthogonalTilemap, "assets/tilemaps/Platformer.json");
-    let player = mainScene.physics.add(Player, "platformer");
+    // let player = mainScene.physics.add(Player, "platformer");
 
-    // mainScene.tilemap.add(OrthogonalTilemap, "assets/tilemaps/TopDown.json");
+    // // mainScene.tilemap.add(OrthogonalTilemap, "assets/tilemaps/TopDown.json");
-    // let player = mainScene.physics.add(Player, "topdown");
+    // // let player = mainScene.physics.add(Player, "topdown");
 
-    mainScene.getViewport().follow(player);
+    // mainScene.getViewport().follow(player);
 
-    pauseMenu.disable();
+    // pauseMenu.disable();
 
     game.start();
 }

tsconfig.json

@@ -18,11 +18,11 @@
         "src/Events/GameEvent.ts",
         "src/Events/Receiver.ts",
 
-        "src/GameState/Factories/CanvasNodeFactory.ts",
+        "src/Scene/Factories/CanvasNodeFactory.ts",
-        "src/GameState/Factories/PhysicsNodeFactory.ts",
+        "src/Scene/Factories/PhysicsNodeFactory.ts",
-        "src/GameState/Factories/TilemapFactory.ts",
+        "src/Scene/Factories/TilemapFactory.ts",
-        "src/GameState/GameState.ts",
+        "src/Scene/Scene.ts",
-        "src/GameState/Scene.ts",
+        "src/Scene/Layer.ts",
 
         "src/Input/InputHandler.ts",
         "src/Input/InputReceiver.ts",