From d7d15026d8168ff871c91fa2ff866c5e80dd5d64 Mon Sep 17 00:00:00 2001
From: David Camp <Bpendragon@users.noreply.github.com>
Date: Thu, 7 Aug 2025 19:51:40 -0700
Subject: [PATCH] Add GPS mode toggle and partial implementation

---
 index.js  | 13 ++++++++++++-
 legend.js | 15 ++++++++++++++-
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index 990f135..80bb024 100644
--- a/index.js
+++ b/index.js
@@ -497,9 +497,20 @@ function redrawDynamics(){
     for(const marker of MapData.dynamicMarkers){
         curSprite = null;
         marker.visible = false;
-        if(marker.hidden || (marker.minZoom && MapData.view.scale < marker.minZoom) || (marker.maxZoom && MapData.view.scale > marker.maxZoom)) continue;
         let markerX = MapData.view.convertX(marker.position.x);
         let markerY = MapData.view.convertY(marker.position.z);
+        
+        // Placing this here means the map should always snap to the player if the toggle is on. 
+        // Placing it after culling means that if the user fast travels the map won't snap to them until manually scrolled to near their position. 
+        if(MapData.layers.gps && marker.type === 'player') {
+            //This works fine
+            MapData.view.x = -marker.position.x * MapData.view.scale + mapCanvas.width * 0.5;
+            //This does not
+            // MapData.view.y = -marker.position.z * MapData.view.scale;
+            MapData.view.dirty = true;
+        }
+
+        if(marker.hidden || (marker.minZoom && MapData.view.scale < marker.minZoom) || (marker.maxZoom && MapData.view.scale > marker.maxZoom)) continue;
         if(markerX > mapCanvas.width + Config.viewCullMargin || markerX < -Config.viewCullMargin || markerY > mapCanvas.height + Config.viewCullMargin || markerY < -Config.viewCullMargin) continue; // View Culling
         switch(marker.type){
             case 'player':
diff --git a/legend.js b/legend.js
index bd83411..cf1c0dc 100644
--- a/legend.js
+++ b/legend.js
@@ -256,7 +256,20 @@ let settingEntries = [
                 func: state =>{
                     MapData.layers.player = state;
                     MapData.view.dynDirty = true;
-                }
+                },
+                children: [
+                    {
+                        label: 'Follow Player',
+                        tooltip: 'Keep View centered on player',
+                        id: 'toggle_gps',
+                        saveState: true,
+                        state: true,
+                        func: state =>{
+                            MapData.layers.gps = state;
+                            MapData.view.dynDirty = true;
+                        }
+                    }
+                ]
             },
             {
                 label: 'Train Cars',