From 2f6b3afbab3c799272700073d88ecd76bbd7f412 Mon Sep 17 00:00:00 2001
From: Dimava <dimava2@ya.ru>
Date: Fri, 3 Jul 2020 23:02:27 +0300
Subject: [PATCH] Wheel zoom saves world mouse position

---
 src/js/game/camera.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/js/game/camera.js b/src/js/game/camera.js
index 2caeb863..477bf5ec 100644
--- a/src/js/game/camera.js
+++ b/src/js/game/camera.js
@@ -509,6 +509,14 @@ export class Camera extends BasicSerializableObject {
 
         this.clampZoomLevel();
         this.desiredZoom = null;
+
+        const mousePosition = this.root.app.mousePosition;
+        if (mousePosition) {
+            const worldPos = this.root.camera.screenToWorld(mousePosition);
+            let de = worldPos.sub(this.center);
+            this.center = this.center.add(de.multiplyScalar(delta));
+        }
+
         return false;
     }