[Client] Don't send WorldMap packets for already explored map tiles

apps/openmw/mwmp/Worldstate.cpp

@@ -31,21 +31,43 @@ Networking *Worldstate::getNetworking()
     return mwmp::Main::get().getNetworking();
 }
 
-void Worldstate::sendMapExplored(int x, int y, const std::vector<char>& imageData)
+bool Worldstate::containsExploredMapTile(int cellX, int cellY)
+{
+    for (const auto &mapTile : exploredMapTiles)
+    {
+        if (mapTile.x == cellX && mapTile.y == cellY)
+            return true;
+    }
+
+    return false;
+}
+
+void Worldstate::markExploredMapTile(int cellX, int cellY)
+{
+    mwmp::MapTile exploredTile;
+    exploredTile.x = cellX;
+    exploredTile.y = cellY;
+    exploredMapTiles.push_back(exploredTile);
+}
+
+void Worldstate::sendMapExplored(int cellX, int cellY, const std::vector<char>& imageData)
 {
     mapChanges.mapTiles.clear();
 
     mwmp::MapTile mapTile;
-    mapTile.x = x;
+    mapTile.x = cellX;
-    mapTile.y = y;
+    mapTile.y = cellY;
     mapTile.imageData = imageData;
 
-    LOG_MESSAGE_SIMPLE(Log::LOG_INFO, "Sending ID_PLAYER_MAP with x: %i, y: %i", x, y);
+    LOG_MESSAGE_SIMPLE(Log::LOG_ERROR, "Sending ID_PLAYER_MAP with x: %i, y: %i", cellX, cellY);
 
     mapChanges.mapTiles.push_back(mapTile);
 
     getNetworking()->getWorldstatePacket(ID_WORLD_MAP)->setWorldstate(this);
     getNetworking()->getWorldstatePacket(ID_WORLD_MAP)->Send();
+
+    // Keep this tile marked as explored so we don't send any more packets for it
+    markExploredMapTile(mapTile.x, mapTile.y);
 }
 
 void Worldstate::setMapExplored()
@@ -58,5 +80,8 @@ void Worldstate::setMapExplored()
             MWBase::Environment::get().getWindowManager()->addVisitedLocation(cellStore->getCell()->mName, mapTile.x, mapTile.y);
 
         MWBase::Environment::get().getWindowManager()->setGlobalMapImage(mapTile.x, mapTile.y, mapTile.imageData);
+
+        // Keep this tile marked as explored so we don't send any more packets for it
+        markExploredMapTile(mapTile.x, mapTile.y);
     }
 }

apps/openmw/mwmp/Worldstate.hpp

@@ -13,11 +13,18 @@ namespace mwmp
         Worldstate();
         virtual ~Worldstate();
 
+        bool containsExploredMapTile(int cellX, int cellY);
+
+        void markExploredMapTile(int cellX, int cellY);
+
         void setMapExplored();
 
-        void sendMapExplored(int x, int y, const std::vector<char>& imageData);
+        void sendMapExplored(int cellX, int cellY, const std::vector<char>& imageData);
 
     private:
+
+        std::vector<MapTile> exploredMapTiles;
+
         Networking *getNetworking();
 
     };

apps/openmw/mwrender/globalmap.cpp

@@ -636,11 +636,20 @@ namespace MWRender
             /*
                 Start of tes3mp addition
 
-                Send an ID_PLAYER_MAP packet with this map tile to the server
+                Send an ID_PLAYER_MAP packet with this map tile to the server, but only if:
+                1) We have recorded the exterior cell corresponding to this tile's coordinates
+                2) The tile has not previously been marked as explored in this client's mwmp::Worldstate
             */
             if (originToCellX.count(imageDest.mX) > 0 && originToCellY.count(imageDest.mY) > 0)
             {
-                LOG_MESSAGE_SIMPLE(Log::LOG_INFO, "New global map tile corresponds to cell %i, %i", originToCellX.at(imageDest.mX), originToCellY.at(imageDest.mY));
+                int cellX = originToCellX.at(imageDest.mX);
+                int cellY = originToCellY.at(imageDest.mY);
+
+                mwmp::Worldstate *worldstate = mwmp::Main::get().getNetworking()->getWorldstate();
+
+                if (!worldstate->containsExploredMapTile(cellX, cellY))
+                {
+                    LOG_MESSAGE_SIMPLE(Log::LOG_ERROR, "New global map tile corresponds to cell %i, %i", originToCellX.at(imageDest.mX), originToCellY.at(imageDest.mY));
 
                     osgDB::ReaderWriter* readerwriter = osgDB::Registry::instance()->getReaderWriterForExtension("png");
                     if (!readerwriter)
@@ -661,7 +670,8 @@ namespace MWRender
                     std::string stringData = ostream.str();
                     std::vector<char> vectorData = std::vector<char>(stringData.begin(), stringData.end());
 
-                mwmp::Main::get().getNetworking()->getWorldstate()->sendMapExplored(originToCellX.at(imageDest.mX), originToCellY.at(imageDest.mY), vectorData);
+                    worldstate->sendMapExplored(cellX, cellY, vectorData);
+                }
             }
             /*
                 End of tes3mp addition