Added darklands

src/Location.h

@@ -83,6 +83,11 @@ namespace ZL
 
 		std::vector<TriggerZone> triggerZones;
 
+		bool isDarklands = false;
+
+		// Returns false if a transition is already in progress (guards against double-press).
+		bool startDarklandsTransition();
+
 		// Navigation editor — toggle with 'N', save with 'B', right-click to finalize polygon
 		bool navigationEditorMode = false;
 
@@ -117,6 +122,7 @@ namespace ZL
 		void drawGame();
 		void drawShadowDepthPass();
 		void drawGameWithShadows();
+		void drawGameDarklands();
 
 		bool setNavigationAreaAvailable(const std::string& areaName, bool available);
 
@@ -137,6 +143,17 @@ namespace ZL
 		Inventory& inventory;		
 
 	private:
+		// White-flash transition state for darklands toggle
+		float darklandsFlashAlpha = 0.0f;
+		bool  darklandsFlashActive = false;
+		bool  darklandsFlashFadingIn = true;
+		VertexRenderStruct darklandsFlashQuad;
+		float darklandsFlashQuadW = -1.0f;
+		float darklandsFlashQuadH = -1.0f;
+
+		void updateDarklandsFlash(int64_t deltaMs);
+		void drawDarklandsFlash();
+
 		void resolveCharacterCollisions();
 		void updateDynamicReplans(int64_t deltaMs);
 		void loadTeleportZones(const std::string& jsonPath, const char* zipFile);