Read collision barriers from map file

src/model/data/map.ts

@@ -1,11 +1,20 @@
+export interface CollisionPolygon {
+	readonly type: 'polygon';
+	readonly vertices: Array<[number, number]>;
+}
+
+export type Collision = CollisionPolygon;
+
 export interface Input {
 	readonly tiles: string[];
 	readonly layers: number[][][];
+	readonly collision: Collision[];
 }
 
 export class MapData {
 	public readonly tiles: string[];
 	public readonly layers: number[][][];
+	public readonly collision: Collision[];
 
 	public readonly width: number;
 	public readonly height: number;
@@ -13,6 +22,7 @@ export class MapData {
 	constructor(data: Input) {
 		this.tiles = data.tiles;
 		this.layers = data.layers;
+		this.collision = data.collision;
 
 		this.height = this.layers[0].length;
 		this.width = this.layers[0][0].length;