delta refactor

fe/src/Guy.ts

@@ -21,4 +21,22 @@ class Guy extends egret.Sprite {
     texture._setBitmapData(this.imageLoader.data)
     this.avatar.texture = texture
   }
+  private step = 72
+  public applyDelta(delta){
+    this.x += this.step * delta.x
+    this.y += this.step * delta.y
+    
+    if(this.x <= 0){
+        this.x = 0
+    }
+    if(this.y <= 0){
+        this.y = 0
+    }
+    if(this.y >= 72*9){
+        this.y = 72*9
+    }
+    if(this.x >= 72*13){
+        this.x = 72*13
+    }
+  }
 }
\ No newline at end of file

fe/src/scenes/GameScene.ts

@@ -19,10 +19,9 @@ class GameScene extends egret.Sprite {
     this.addChild(this.me)
   }
 
-  private step = 72
+
   private onPositionChange(delta){
-    this.me.x += this.step * delta.data.x
-    this.me.y += this.step * delta.data.y
+    this.me.applyDelta(delta.data)
   }
 
   public release() {