Refactoring "exit" to allow multiple maps

Adding several layers named "exit" causes issues with Phaser 3.
This PR makes any possible layer being an exit layer (it only depends on the exitUrl property)

Also, fixing start position (it takes into account the layer width now)

README.md

@@ -47,7 +47,7 @@ A few things to notice:
 
 In order to place an on your scene that leads to another scene:
 
-- You must create an "exit" layer. The layer name MUST be "exit".
+- You must create an specific layer. When a character reaches ANY tile of that layer, it will exit the scene.
 - In layer properties, you must add "exitSceneUrl" property. It represents the map URL of the next scene. For example : `/<map folder>/<map>.json`. Be careful, if you want the next map to be correctly loaded, you must check that the map files are in folder `back/src/Assets/Maps/<your map folder>`. The files will be accessible by url `<HOST>/map/files/<your map folder>/...`.
 - If you want to have multiple exits, you can create many layers with name "exit". Each layer has a different key `exitSceneUrl` and have tiles that represent exits to another scene.
 

back/src/Assets/Maps/Floor0/floor0.json

@@ -9,7 +9,7 @@
      "export":
         {
          "format":"json",
-         "target":"map.json"
+         "target":"back\/src\/Assets\/Maps\/Floor0\/map.json"
         }
     },
  "height":18,
@@ -22,7 +22,7 @@
          "name":"background",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -34,7 +34,7 @@
          "name":"start",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -43,7 +43,7 @@
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          "height":18,
          "id":10,
-         "name":"exit",
+         "name":"exit1",
          "opacity":1,
          "properties":[
                 {
@@ -52,17 +52,35 @@
                  "value":"\/Floor1\/floor1.json"
                 }],
          "type":"tilelayer",
+         "visible":false,
+         "width":46,
+         "x":0,
+         "y":0
+        }, 
+        {
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+         "height":18,
+         "id":2,
+         "name":"bottom",
+         "opacity":1,
+         "type":"tilelayer",
          "visible":true,
          "width":46,
          "x":0,
          "y":0
         }, 
         {
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          "height":18,
-         "id":2,
+         "id":12,
-         "name":"bottom",
+         "name":"exit2",
          "opacity":1,
+         "properties":[
+                {
+                 "name":"exitSceneUrl",
+                 "type":"string",
+                 "value":"\/Lyon\/lyon.json"
+                }],
          "type":"tilelayer",
          "visible":true,
          "width":46,
@@ -76,7 +94,7 @@
          "name":"top",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -88,7 +106,7 @@
          "name":"book",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -100,7 +118,7 @@
          "name":"ordi",
          "opacity":1,
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
@@ -112,7 +130,7 @@
          "objects":[],
          "opacity":1,
          "type":"objectgroup",
-         "visible":true,
+         "visible":false,
          "x":0,
          "y":0
         }, 
@@ -129,12 +147,12 @@
                  "value":3
                 }],
          "type":"tilelayer",
-         "visible":true,
+         "visible":false,
          "width":46,
          "x":0,
          "y":0
         }],
- "nextlayerid":12,
+ "nextlayerid":13,
  "nextobjectid":1,
  "orientation":"orthogonal",
  "renderorder":"right-down",

front/src/Phaser/Game/GameScene.ts

@@ -107,7 +107,7 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
             if (layer.type === 'tilelayer') {
                 this.addLayer(this.Map.createStaticLayer(layer.name, this.Terrains, 0, 0).setDepth(depth));
             }
-            if (layer.type === 'tilelayer' && layer.name === "exit") {
+            if (layer.type === 'tilelayer' && this.getExitSceneUrl(layer) !== undefined) {
                 this.loadNextGame(layer, this.map.width, this.map.tilewidth, this.map.tileheight);
             }
             if (layer.type === 'tilelayer' && layer.name === "start") {
@@ -153,6 +153,18 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
         this.circleTexture.refresh();
     }
 
+    private getExitSceneUrl(layer: ITiledMapLayer): string|undefined {
+        let properties : any = layer.properties;
+        if (!properties) {
+            return undefined;
+        }
+        let obj = properties.find((property:any) => property.name === "exitSceneUrl");
+        if (obj === undefined) {
+            return undefined;
+        }
+        return obj.value;
+    }
+
     /**
      *
      * @param layer
@@ -161,15 +173,14 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
      * @param tileHeight
      */
     private loadNextGame(layer: ITiledMapLayer, mapWidth: number, tileWidth: number, tileHeight: number){
-        let properties : any = layer.properties;
+        let exitSceneUrl = this.getExitSceneUrl(layer);
-        let exitSceneUrl = properties.find((property:any) => property.name === "exitSceneUrl");
 
-        let exitSceneKey = getMapKeyByUrl(exitSceneUrl.value);
+        let exitSceneKey = getMapKeyByUrl(exitSceneUrl);
 
         let gameIndex = this.scene.getIndex(exitSceneKey);
         let game : Phaser.Scene = null;
         if(gameIndex === -1){
-            game = new GameScene(exitSceneKey, `${MAP_FILE_URL}${exitSceneUrl.value}`);
+            game = new GameScene(exitSceneKey, `${MAP_FILE_URL}${exitSceneUrl}`);
             this.scene.add(exitSceneKey, game, false);
         }else{
             game = this.scene.get(exitSceneKey);
@@ -186,6 +197,7 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
             let y : number = parseInt(((key + 1) / mapWidth).toString());
             let x : number = key - (y * mapWidth);
             //push and save switching case
+            // TODO: this is not efficient. We should refactor that to enable a search by key. For instance: this.PositionNextScene[y][x] = exitSceneKey
             this.PositionNextScene.push({
                 xStart: (x * tileWidth),
                 yStart: (y * tileWidth),
@@ -205,9 +217,8 @@ export class GameScene extends Phaser.Scene implements GameSceneInterface, Creat
             if(objectKey === 0){
                 return;
             }
-            let y = (key / 45);
+            let y = Math.floor(key / layer.width);
-            y = parseInt(`${y}`);
+            let x = key % layer.width;
-            let x = key - (y * 46);
 
             this.startX = (x * 32);
             this.startY = (y * 32);