From 9be9f8e73940f1a38410575557fcd57cc620a8f4 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Mon, 5 Nov 2018 01:28:35 +0100
Subject: Read collision barriers from map file

---
 src/controller/gamecontext.ts | 58 ++++++++++++++++++++++---------------------
 src/model/data/map.ts         | 10 ++++++++
 2 files changed, 40 insertions(+), 28 deletions(-)

(limited to 'src')

diff --git a/src/controller/gamecontext.ts b/src/controller/gamecontext.ts
index 8107b31..cfdcda5 100644
--- a/src/controller/gamecontext.ts
+++ b/src/controller/gamecontext.ts
@@ -1,4 +1,4 @@
-import { MapData } from '../model/data/map';
+import { Collision, MapData } from '../model/data/map';
 
 import { loadSimpleEntity } from '../view/entity';
 import { DirectionHandler } from '../view/input/directionhandler';
@@ -13,19 +13,41 @@ import { vec2 } from 'gl-matrix';
 
 export class GameContext {
 	public static async load(renderer: Renderer): Promise<GameContext> {
-		const mapView = this.loadMap(renderer);
 		const entity = loadSimpleEntity(renderer, 'simple_circle');
+		const [mapView, collision] = await this.loadMap(renderer);
 
 		return new GameContext(
 			renderer,
-			await mapView,
+			mapView,
 			await entity,
+			collision,
 		);
 	}
 
-	private static async loadMap(renderer: Renderer): Promise<SpriteView> {
+	private static mkCollision(collision: Collision[]): LineSegment[] {
+		const ret: LineSegment[] = [];
+
+		for (const c of collision) {
+			switch (c.type) {
+			case 'polygon':
+				if (!c.vertices.length)
+					continue;
+
+				let prev = c.vertices[c.vertices.length - 1];
+
+				for (const v of c.vertices) {
+					ret.push(LineSegment.fromPoints(vec2.clone(prev), vec2.clone(v)));
+					prev = v;
+				}
+			}
+		}
+
+		return ret;
+	}
+
+	private static async loadMap(renderer: Renderer): Promise<[SpriteView, LineSegment[]]> {
 		const map = new MapData(await getJSON('resources/map/test.json'));
-		return loadMap(renderer, map);
+		return [await loadMap(renderer, map), this.mkCollision(map.collision)];
 	}
 
 	private time: number|null = null;
@@ -40,32 +62,12 @@ export class GameContext {
 	private readonly entityMovement: vec2 = vec2.create();
 
 	private readonly collisionRadius = 7 / 16;
-	private readonly walls: LineSegment[] = [
-		LineSegment.fromPoints(vec2.fromValues(1, 1), vec2.fromValues(11, 1)),
-
-		LineSegment.fromPoints(vec2.fromValues(11, 1), vec2.fromValues(11, 5)),
-		LineSegment.fromPoints(vec2.fromValues(11, 5), vec2.fromValues(12, 5)),
-		LineSegment.fromPoints(vec2.fromValues(12, 5), vec2.fromValues(12, 7)),
-		LineSegment.fromPoints(vec2.fromValues(12, 7), vec2.fromValues(11, 7)),
-		LineSegment.fromPoints(vec2.fromValues(11, 7), vec2.fromValues(11, 11)),
-
-		LineSegment.fromPoints(vec2.fromValues(11, 11), vec2.fromValues(7, 11)),
-		LineSegment.fromPoints(vec2.fromValues(7, 11), vec2.fromValues(7, 12)),
-		LineSegment.fromPoints(vec2.fromValues(7, 12), vec2.fromValues(5, 12)),
-		LineSegment.fromPoints(vec2.fromValues(5, 12), vec2.fromValues(5, 11)),
-		LineSegment.fromPoints(vec2.fromValues(5, 11), vec2.fromValues(1, 11)),
-
-		LineSegment.fromPoints(vec2.fromValues(1, 11), vec2.fromValues(1, 7)),
-		LineSegment.fromPoints(vec2.fromValues(1, 7), vec2.fromValues(0, 7)),
-		LineSegment.fromPoints(vec2.fromValues(0, 7), vec2.fromValues(0, 5)),
-		LineSegment.fromPoints(vec2.fromValues(0, 5), vec2.fromValues(1, 5)),
-		LineSegment.fromPoints(vec2.fromValues(1, 5), vec2.fromValues(1, 1)),
-	];
 
 	private constructor(
 		private readonly renderer: Renderer,
 		private readonly mapView: SpriteView,
 		private readonly entity: SpriteView,
+		private readonly collision: LineSegment[],
 	) {
 		this.input = new DirectionHandler();
 		this.input.addListener((v) => {
@@ -99,8 +101,8 @@ export class GameContext {
 
 			const move = new Movement(this.entityPos, dest);
 
-			for (const w of this.walls) {
-				if (!w.collidesMoveCircle(dest2, move, this.collisionRadius))
+			for (const c of this.collision) {
+				if (!c.collidesMoveCircle(dest2, move, this.collisionRadius))
 					continue;
 
 				if (!vec2.exactEquals(dest, dest2)) {
diff --git a/src/model/data/map.ts b/src/model/data/map.ts
index d6fd835..4d9ecda 100644
--- a/src/model/data/map.ts
+++ b/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;
-- 
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