From fb4abb72568183018fa8ad316b2687f5de497d11 Mon Sep 17 00:00:00 2001
From: tekki mariani <tekki.mariani@googlemail.com>
Date: Fri, 20 Mar 2026 20:37:11 +0000
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20zoom-to-mouse:=20ptr.worldX/Y=20?=
 =?UTF-8?q?formula,=20debug=20log=20still=20active?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/systems/CameraSystem.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/systems/CameraSystem.ts b/src/systems/CameraSystem.ts
index 51df78c..3e1d873 100644
--- a/src/systems/CameraSystem.ts
+++ b/src/systems/CameraSystem.ts
@@ -62,13 +62,16 @@ export class CameraSystem {
     this.debugCross.lineBetween(cx - 12, cy, cx + 12, cy)
     this.debugCross.lineBetween(cx, cy - 12, cx, cy + 12)
 
-    // Scroll wheel zoom
+    // Scroll wheel zoom — zoom toward mouse pointer
     this.scene.input.on('wheel', (ptr: Phaser.Input.Pointer, _objs: unknown, _dx: number, dy: number) => {
       const newZoom = Phaser.Math.Clamp(cam.zoom - Math.sign(dy) * ZOOM_STEP, MIN_ZOOM, MAX_ZOOM)
+      if (newZoom === cam.zoom) return
       cam.setZoom(newZoom)
+      cam.scrollX = ptr.worldX - ptr.x / newZoom
+      cam.scrollY = ptr.worldY - ptr.y / newZoom
       const centerX = cam.scrollX + cam.width  / (2 * cam.zoom)
       const centerY = cam.scrollY + cam.height / (2 * cam.zoom)
-      console.log(`[zoom] ptr.x=${ptr.x.toFixed(0)} ptr.y=${ptr.y.toFixed(0)} | ptr.worldX=${ptr.worldX.toFixed(0)} ptr.worldY=${ptr.worldY.toFixed(0)} | center=(${centerX.toFixed(0)}, ${centerY.toFixed(0)}) zoom=${cam.zoom.toFixed(2)}`)
+      console.log(`[zoom] ptr=(${ptr.x.toFixed(0)},${ptr.y.toFixed(0)}) world=(${ptr.worldX.toFixed(0)},${ptr.worldY.toFixed(0)}) center=(${centerX.toFixed(0)},${centerY.toFixed(0)}) zoom=${cam.zoom.toFixed(2)}`)
     })
 
     // Middle-click pan: start on button down