Enhance blood stain mechanics: add dynamic blood surface generation and integrate blood stains into game rendering

engine/graphics.py

@@ -22,15 +22,37 @@ class Graphics():
 
     def draw_maze(self):
         if self.background_texture is None:
-            
-            texture_tiles = []
-            for y, row in enumerate(self.map.matrix):
-                for x, cell in enumerate(row):
-                    variant = x*y % 4
-                    tile = self.grasses[variant] if cell else self.tunnel
-                    texture_tiles.append((tile, x*self.cell_size, y*self.cell_size))
-            self.background_texture = self.render_engine.create_texture(texture_tiles)
+            print("Generating background texture")
+            self.regenerate_background()
         self.render_engine.draw_background(self.background_texture)
+    
+    def regenerate_background(self):
+        """Generate or regenerate the background texture with all permanent elements"""
+        texture_tiles = []
+        for y, row in enumerate(self.map.matrix):
+            for x, cell in enumerate(row):
+                variant = x*y % 4
+                tile = self.grasses[variant] if cell else self.tunnel
+                texture_tiles.append((tile, x*self.cell_size, y*self.cell_size))
+        
+        # Add blood stains if any exist
+        if hasattr(self, 'blood_stains'):
+            for position, blood_surface in self.blood_stains.items():
+                texture_tiles.append((blood_surface, position[0]*self.cell_size, position[1]*self.cell_size))
+        
+        self.background_texture = self.render_engine.create_texture(texture_tiles)
+    
+    def add_blood_stain(self, position):
+        """Add a blood stain to the background at the specified position"""
+        if not hasattr(self, 'blood_stains'):
+            self.blood_stains = {}
+        
+        # Generate blood surface
+        blood_surface = self.render_engine.generate_blood_surface()
+        self.blood_stains[position] = blood_surface
+        
+        # Regenerate background to include the new blood stain
+        self.regenerate_background()
         
     def scroll_cursor(self, x=0, y=0):
         if self.pointer[0] + x > self.map.width or self.pointer[1] + y > self.map.height: