dont require output belts to be aligned with output ports

src/lib/sim/BeltSystem.cpp

@@ -92,18 +92,14 @@ void BeltSystem::setSplitterFilters(QPoint tile,
 // Port interface
 // ---------------------------------------------------------------------------
 
-bool BeltSystem::tryPutItem(Port port, Item item)
+bool BeltSystem::tryPutItem(QPoint tile, Item item)
 {
-    const std::map<std::pair<int, int>, BeltTile>::iterator it = m_belts.find(key(port.tile));
+    const std::map<std::pair<int, int>, BeltTile>::iterator it = m_belts.find(key(tile));
     if (it == m_belts.end())
     {
         return false;
     }
-    if (it->second.direction != port.direction)
-    {
-        return false;
-    }
-    return tryPlaceOnBelt(port.tile, item);
+    return tryPlaceOnBelt(tile, item);
 }
 
 std::optional<Item> BeltSystem::tryTakeItem(Port port)

src/lib/sim/BeltSystem.h

@@ -56,9 +56,9 @@ public:
     // port.tile      = the belt tile adjacent to the building
     // port.direction = direction items flow on that tile
     //
-    // tryPutItem: place item onto port.tile entering from the opposite side.
-    //   Returns false if the tile is not a belt, direction mismatches, or tile full.
-    bool tryPutItem(Port port, Item item);
+    // tryPutItem: place item onto tile.
+    //   Returns false if the tile is not a belt, or tile full.
+    bool tryPutItem(QPoint tile, Item item);
 
     // tryTakeItem: remove and return the leading item from port.tile.
     //   Returns nullopt if tile is not a belt, direction mismatches, or tile empty.
@@ -119,3 +119,4 @@ private:
     std::map<std::pair<int, int>, BeltTile>     m_belts;
     std::map<std::pair<int, int>, SplitterTile> m_splitters;
 };
+

src/lib/sim/BuildingSystem.cpp

@@ -726,7 +726,7 @@ void BuildingSystem::tickBeltPush()
                 break;
             }
             const Item item = building.outputBuffer.items.front();
-            if (m_belts.tryPutItem(outputPort, item))
+            if (m_belts.tryPutItem(outputPort.tile, item))
             {
                 building.outputBuffer.items.erase(building.outputBuffer.items.begin());
             }