added tilemaps and a resource loader

src/DataTypes/Tilesets/TiledData.ts

@@ -0,0 +1,33 @@
+export class TiledTilemapData {
+    height: number;
+    width: number;
+    orientation: string;
+    layers: TiledLayerData[];
+    tilesets: TiledTilesetData[];
+}
+
+export class TiledTilesetData {
+    columns: number;
+    tilewidth: number;
+    tileheight: number;
+    tilecount: number;
+    firstgid: number;
+    imageheight: number;
+    imagewidth: number;
+    margin: number;
+    spacing: number;
+    name: string;
+    image: string;
+}
+
+export class TiledLayerData {
+    data: number[];
+    x: number;
+    y: number;
+    width: number;
+    height: number;
+    name: string;
+    opacity: number;
+    visible: boolean;
+}
+

src/DataTypes/Tilesets/Tileset.ts

@@ -0,0 +1,80 @@
+import Vec2 from "../Vec2";
+import { TiledTilesetData } from "./TiledData";
+
+/**
+ * The data representation of a Tileset for the game engine. This represents one image,
+ * with a startIndex if required (as it is with Tiled using two images in one tilset).
+ */
+export default class Tileset {
+    protected imageUrl: string;
+    protected image: HTMLImageElement = null;
+    protected imageSize: Vec2;
+    protected startIndex: number;
+    protected endIndex: number;
+    protected tileSize: Vec2;
+    protected numRows: number;
+    protected numCols: number;
+
+    constructor(tilesetData: TiledTilesetData){
+        this.initFromTiledData(tilesetData);
+    }
+
+    initFromTiledData(tiledData: TiledTilesetData){
+        this.numRows = tiledData.tilecount/tiledData.columns;
+        this.numCols = tiledData.columns;
+        this.startIndex = tiledData.firstgid;
+        this.endIndex = this.startIndex + tiledData.tilecount - 1;
+        this.tileSize = new Vec2(tiledData.tilewidth, tiledData.tilewidth);
+        this.imageUrl = tiledData.image;
+        this.imageSize = new Vec2(tiledData.imagewidth, tiledData.imageheight);
+    }
+
+    getImageUrl(): string {
+        return this.imageUrl
+    }
+
+    getImage(): HTMLImageElement {
+        return this.image;
+    }
+
+    setImage(image: HTMLImageElement){
+        this.image = image;
+    }
+
+    getStartIndex(): number {
+        return this.startIndex;
+    }
+
+    getTileSize(): Vec2 {
+        return this.tileSize;
+    }
+
+    getNumRows(): number {
+        return this.numRows;
+    }
+
+    getNumCols(): number {
+        return this.numCols;
+    }
+
+    isReady(): boolean {
+        return this.image !== null;
+    }
+
+    hasTile(tileIndex: number): boolean {
+        return tileIndex >= this.startIndex && tileIndex <= this.endIndex;
+    }
+
+    renderTile(ctx: CanvasRenderingContext2D, tileIndex: number, dataIndex: number, worldSize: Vec2, origin: Vec2): void {
+        let index = tileIndex - this.startIndex;
+        let row = Math.floor(index / this.numCols);
+        let col = index % this.numCols;
+        let width = this.tileSize.x;
+        let height = this.tileSize.y;
+        let left = col * width;
+        let top = row * height;
+        let x = (dataIndex % worldSize.x) * width * 4;
+        let y = Math.floor(dataIndex / worldSize.x) * height * 4;
+        ctx.drawImage(this.image, left, top, width, height, x - origin.x, y - origin.y, width * 4, height * 4);
+    }
+}

src/GameState/Factories/TilemapFactory.ts

@@ -0,0 +1,37 @@
+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";
+
+export default class TilemapFactory {
+    private scene: Scene;
+    private viewport: Viewport;
+    private resourceManager: ResourceManager;
+
+	constructor(scene: Scene, viewport: Viewport){
+        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);
+
+                // Add to scene
+                this.scene.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/Scene.ts

@@ -3,30 +3,36 @@ import Viewport from "../SceneGraph/Viewport";
 import SceneGraph from "../SceneGraph/SceneGraph";
 import SceneGraphArray from "../SceneGraph/SceneGraphArray";
 import CanvasNode from "../Nodes/CanvasNode";
-import CavnasNodeFactory from "./Factories/CanvasNodeFactory";
 import CanvasNodeFactory from "./Factories/CanvasNodeFactory";
 import GameState from "./GameState";
+import Tilemap from "../Nodes/Tilemap";
+import TilemapFactory from "./Factories/TilemapFactory";
 
 export default class Scene {
     private gameState: GameState;
     private viewport: Viewport
     private parallax: Vec2;
     sceneGraph: SceneGraph;
+    private tilemaps: Array<Tilemap>;
     private paused: boolean;
     private hidden: boolean;
     
     // Factories
-    public canvas: CavnasNodeFactory;
+    public canvasNode: CanvasNodeFactory;
+    public tilemap: TilemapFactory;
 
     constructor(viewport: Viewport, gameState: GameState){
         this.gameState = gameState;
         this.viewport = viewport;
         this.parallax = new Vec2(1, 1);
         this.sceneGraph = new SceneGraphArray(this.viewport, this);
+        this.tilemaps = new Array<Tilemap>();
         this.paused = false;
         this.hidden = false;
 
-        this.canvas = new CanvasNodeFactory(this, this.viewport);
+        // Factories
+        this.canvasNode = new CanvasNodeFactory(this, this.viewport);
+        this.tilemap = new TilemapFactory(this, this.viewport);
     }
 
     setPaused(pauseValue: boolean): void {
@@ -71,6 +77,10 @@ export default class Scene {
         this.sceneGraph.addNode(children);
     }
 
+    addTilemap(tilemap: Tilemap): void {
+        this.tilemaps.push(tilemap);
+    }
+
     update(deltaT: number): void {
         if(!this.paused){
             this.viewport.update(deltaT);
@@ -83,7 +93,17 @@ export default class Scene {
             let visibleSet = this.sceneGraph.getVisibleSet();
             let viewportOrigin = this.viewport.getPosition();
             let origin = new Vec2(viewportOrigin.x*this.parallax.x, viewportOrigin.y*this.parallax.y);
+            let size = this.viewport.getSize();
+
+            // Render visible set
             visibleSet.forEach(node => node.render(ctx, origin));
+
+            // Render tilemaps
+            this.tilemaps.forEach(tilemap => {
+                if(tilemap.isReady()){
+                    tilemap.render(ctx, origin, size);
+                }
+            });
         }
     }
 }

src/Loop/GameLoop.ts

@@ -4,6 +4,7 @@ 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";
 
 export default class GameLoop{
 	// The amount of time to spend on a physics step
@@ -36,6 +37,7 @@ export default class GameLoop{
 	private recorder: Recorder;
     private gameState: GameState;
     private debug: Debug;
+    private resourceManager: ResourceManager;
 
     constructor(){
         this.maxFPS = 60;
@@ -62,12 +64,15 @@ export default class GameLoop{
         this.recorder = new Recorder();
         this.gameState = new GameState();
         this.debug = Debug.getInstance();
+        this.resourceManager = ResourceManager.getInstance();
     }
 
     private initializeCanvas(canvas: HTMLCanvasElement, width: number, height: number): CanvasRenderingContext2D {
         canvas.width = width;
         canvas.height = height;
-        return canvas.getContext("2d");
+        let ctx = canvas.getContext("2d");
+        ctx.imageSmoothingEnabled = false;
+        return ctx;
     }
 
     setMaxFPS(initMax: number): void {

src/Nodes/CanvasNode.ts

@@ -1,6 +1,5 @@
 import GameNode from "./GameNode";
 import Vec2 from "../DataTypes/Vec2";
-import Viewport from "../SceneGraph/Viewport";
 import Scene from "../GameState/Scene";
 
 export default abstract class CanvasNode extends GameNode{

src/Nodes/ColoredCircle.ts

@@ -10,7 +10,6 @@ export default class ColoredCircle extends CanvasNode{
         super();
         this.position = new Vec2(RandUtils.randInt(0, 1000), RandUtils.randInt(0, 1000));
         this.color = RandUtils.randColor();
-        console.log(this.color.toStringRGB());
         this.size = new Vec2(50, 50);
     }
 

src/Nodes/Tilemap.ts

@@ -0,0 +1,42 @@
+import Vec2 from "../DataTypes/Vec2";
+import GameNode from "./GameNode";
+import Tileset from "../DataTypes/Tilesets/Tileset";
+import { TiledTilemapData, TiledLayerData } from "../DataTypes/Tilesets/TiledData"
+
+/**
+ * Represents one layer of tiles
+ */
+export default abstract class Tilemap extends GameNode {
+    protected data: number[];
+    protected tilesets: Tileset[];
+    protected worldSize: Vec2;
+
+    constructor(tilemapData: TiledTilemapData, layerData: TiledLayerData){
+        super();
+        this.tilesets = new Array<Tileset>();
+        this.worldSize = new Vec2(0, 0);
+        this.init(tilemapData, layerData);
+    }
+
+    getTilesets(): Tileset[] {
+        return this.tilesets;
+    }
+
+    isReady(): boolean {
+        if(this.tilesets.length !== 0){
+            for(let tileset of this.tilesets){
+                if(!tileset.isReady()){
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Sets up the tileset using the data loaded from file
+     */
+    abstract init(tilemapData: TiledTilemapData, layerData: TiledLayerData): void;
+
+    abstract render(ctx: CanvasRenderingContext2D, origin: Vec2, viewportSize: Vec2): void;
+}

src/Nodes/Tilemaps/OrthogonalTilemap.ts

@@ -0,0 +1,27 @@
+import Tilemap from "../Tilemap";
+import Vec2 from "../../DataTypes/Vec2";
+import { TiledTilemapData, TiledLayerData } from "../../DataTypes/Tilesets/TiledData";
+import Tileset from "../../DataTypes/Tilesets/Tileset";
+
+
+export default class OrthogonalTilemap extends Tilemap {
+    init(tilemapData: TiledTilemapData, layer: TiledLayerData): void {
+        this.worldSize.set(tilemapData.width, tilemapData.height);
+        this.data = layer.data;
+        tilemapData.tilesets.forEach(tilesetData => this.tilesets.push(new Tileset(tilesetData)));
+    }
+
+    update(deltaT: number): void {}
+
+    render(ctx: CanvasRenderingContext2D, origin: Vec2, viewportSize: Vec2) {
+        for(let i = 0; i < this.data.length; i++){
+            let tileIndex = this.data[i];
+
+            for(let tileset of this.tilesets){
+                if(tileset.hasTile(tileIndex)){
+                    tileset.renderTile(ctx, tileIndex, i, this.worldSize, origin);
+                }
+            }
+        }
+    }
+}

src/ResourceManager/ResourceManager.ts

@@ -0,0 +1,43 @@
+export default class ResourceManager {
+    private static instance: ResourceManager;
+
+    private constructor(){};
+
+    static getInstance(): ResourceManager {
+        if(!this.instance){
+            this.instance = new ResourceManager();
+        }
+
+        return this.instance;
+    }
+
+    public loadTilemap(pathToTilemapJSON: string, callback: Function): void {
+        this.loadTextFile(pathToTilemapJSON, (fileText: string) => {
+            let tilemapObject = JSON.parse(fileText);
+            callback(tilemapObject);
+        });
+    }
+
+    private loadTextFile(textFilePath: string, callback: Function): void {
+        let xobj: XMLHttpRequest = new XMLHttpRequest();
+        xobj.overrideMimeType("application/json");
+        xobj.open('GET', textFilePath, true);
+        xobj.onreadystatechange = function () {
+            if ((xobj.readyState == 4) && (xobj.status == 200)) {
+                callback(xobj.responseText);
+            }
+        };
+        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/Utils/StringUtils.ts

@@ -0,0 +1,8 @@
+export default class StringUtils {
+    static getPathFromFilePath(filePath: string): string {
+        let splitPath = filePath.split("/");
+        splitPath.pop();
+        splitPath.push("");
+        return splitPath.join("/");
+    }
+}

src/main.ts

@@ -6,6 +6,7 @@ import ColoredCircle from "./Nodes/ColoredCircle";
 import Color from "./Utils/Color";
 import Button from "./Nodes/UIElements/Button";
 import {} from "./index";
+import OrthogonalTilemap from "./Nodes/Tilemaps/OrthogonalTilemap";
 
 function main(){
     // Create the game object
@@ -23,28 +24,28 @@ function main(){
     pauseMenu.setParallax(0, 0);
 
     // Initialize GameObjects
-    let player = mainScene.canvas.add(Player);
+    let player = mainScene.canvasNode.add(Player);
     mainScene.getViewport().follow(player);
 
-    let recordButton = uiLayer.canvas.add(Button);
+    let recordButton = uiLayer.canvasNode.add(Button);
     recordButton.setSize(100, 50);
     recordButton.setText("Record");
     recordButton.setPosition(400, 30);
     recordButton.onClickEventId = "record_button_press";
 
-    let stopButton = uiLayer.canvas.add(Button);
+    let stopButton = uiLayer.canvasNode.add(Button);
     stopButton.setSize(100, 50);
     stopButton.setText("Stop");
     stopButton.setPosition(550, 30);
     stopButton.onClickEventId = "stop_button_press";
 
-    let playButton = uiLayer.canvas.add(Button);
+    let playButton = uiLayer.canvasNode.add(Button);
     playButton.setSize(100, 50);
     playButton.setText("Play");
     playButton.setPosition(700, 30);
     playButton.onClickEventId = "play_button_press";
 
-    let cycleFramerateButton = uiLayer.canvas.add(Button);
+    let cycleFramerateButton = uiLayer.canvasNode.add(Button);
     cycleFramerateButton.setSize(150, 50);
     cycleFramerateButton.setText("Cycle FPS");
     cycleFramerateButton.setPosition(5, 400);
@@ -55,7 +56,7 @@ function main(){
         i = (i + 1) % 3;
     }
 
-    let pauseButton = uiLayer.canvas.add(Button);
+    let pauseButton = uiLayer.canvasNode.add(Button);
     pauseButton.setSize(100, 50);
     pauseButton.setText("Pause");
     pauseButton.setPosition(700, 400);
@@ -64,12 +65,12 @@ function main(){
         pauseMenu.enable();
     }
 
-    let modalBackground = pauseMenu.canvas.add(UIElement);
+    let modalBackground = pauseMenu.canvasNode.add(UIElement);
     modalBackground.setSize(400, 200);
     modalBackground.setBackgroundColor(new Color(0, 0, 0, 0.4));
     modalBackground.setPosition(200, 100);
 
-    let resumeButton = pauseMenu.canvas.add(Button);
+    let resumeButton = pauseMenu.canvasNode.add(Button);
     resumeButton.setSize(100, 50);
     resumeButton.setText("Resume");
     resumeButton.setPosition(400, 200);
@@ -79,18 +80,13 @@ function main(){
     }
 
     for(let i = 0; i < 10; i++){
-        mainScene.canvas.add(ColoredCircle);
+        mainScene.canvasNode.add(ColoredCircle);
     }
 
-    for(let i = 0; i < 20; i++){
+    backgroundScene.tilemap.add(OrthogonalTilemap, "assets/tilemaps/MultiLayer.json");
-        let cc = backgroundScene.canvas.add(ColoredCircle);
-        cc.setSize(30, 30);
-        cc.setColor(cc.getColor().darken().darken())
-        cc.getColor().a = 0.8;
-    }
 
     for(let i = 0; i < 30; i++){
-        let cc = foregroundLayer.canvas.add(ColoredCircle);
+        let cc = foregroundLayer.canvasNode.add(ColoredCircle);
         cc.setSize(80, 80);
         cc.setColor(cc.getColor().lighten().lighten())
         cc.getColor().a = 0.5;