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:
+            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)
-        self.render_engine.draw_background(self.background_texture)
+    
+    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:

engine/sdl2.py

@@ -1,8 +1,10 @@
 import os
+import random
 import sdl2
 import sdl2.ext
 from sdl2.ext.compat import byteify
 from ctypes import *
+import ctypes
  
 from PIL import Image
 from sdl2 import SDL_AudioSpec
@@ -47,7 +49,9 @@ class GameWindow:
         self.audio_devs["base"] = sdl2.SDL_OpenAudioDevice(None, 0, SDL_AudioSpec(freq=22050, aformat=sdl2.AUDIO_U8, channels=1, samples=2048), None, 0)
         self.audio_devs["effects"] = sdl2.SDL_OpenAudioDevice(None, 0, SDL_AudioSpec(freq=22050, aformat=sdl2.AUDIO_U8, channels=1, samples=2048), None, 0)
         self.audio_devs["music"] = sdl2.SDL_OpenAudioDevice(None, 0, SDL_AudioSpec(freq=22050, aformat=sdl2.AUDIO_U8, channels=1, samples=2048), None, 0)
+
     def create_texture(self, tiles: list):
+        # Always create a fresh surface since we free it after use
         bg_surface = sdl2.SDL_CreateRGBSurface(0, self.width, self.height, 32, 0, 0, 0, 0)
         for tile in tiles:
             dstrect = sdl2.SDL_Rect(tile[1], tile[2], self.cell_size, self.cell_size)
@@ -274,3 +278,111 @@ class GameWindow:
 
     def get_view_center(self):
         return self.w_offset + self.width // 2, self.h_offset + self.height // 2
+    
+
+
+    def generate_blood_surface(self):
+        """Genera dinamicamente una superficie di macchia di sangue usando SDL2"""
+        size = self.cell_size
+
+        # Crea una superficie RGBA per la macchia di sangue
+        blood_surface = sdl2.SDL_CreateRGBSurface(
+            0, size, size, 32,
+            0x000000FF,  # R mask
+            0x0000FF00,  # G mask
+            0x00FF0000,  # B mask
+            0xFF000000   # A mask
+        )
+        
+        if not blood_surface:
+            return None
+            
+        # Blocca la superficie per il disegno pixel per pixel
+        sdl2.SDL_LockSurface(blood_surface)
+        
+        # Ottieni i dati dei pixel
+        pixels = cast(blood_surface.contents.pixels, POINTER(c_uint32))
+        pitch = blood_surface.contents.pitch // 4  # pitch in pixel (32-bit)
+        
+        # Colori del sangue (variazioni di rosso)
+        blood_colors = [
+            0xFF8B0000,  # Rosso scuro
+            0xFFB22222,  # Rosso mattone
+            0xFFDC143C,  # Cremisi
+            0xFFFF0000,  # Rosso puro
+            0xFF800000,  # Marrone
+        ]
+        
+        # Genera la macchia con un algoritmo di diffusione
+        center_x, center_y = size // 2, size // 2
+        
+        # Inizia dal centro e espandi verso l'esterno
+        max_radius = size // 3 + random.randint(-3, 5)
+        
+        for y in range(size):
+            for x in range(size):
+                # Calcola la distanza dal centro
+                distance = ((x - center_x) ** 2 + (y - center_y) ** 2) ** 0.5
+                
+                # Probabilità di avere sangue basata sulla distanza
+                if distance <= max_radius:
+                    # Più vicino al centro, più probabile avere sangue
+                    probability = max(0, 1 - (distance / max_radius))
+                    
+                    # Aggiungi rumore per forma irregolare
+                    noise = random.random() * 0.7
+                    
+                    if random.random() < probability * noise:
+                        # Scegli un colore di sangue casuale
+                        color = random.choice(blood_colors)
+                        
+                        # Aggiungi variazione di alpha per trasparenza
+                        alpha = int(255 * probability * random.uniform(0.6, 1.0))
+                        color = (color & 0x00FFFFFF) | (alpha << 24)
+                        
+                        pixels[y * pitch + x] = color
+                    else:
+                        # Pixel trasparente
+                        pixels[y * pitch + x] = 0x00000000
+                else:
+                    # Fuori dal raggio, trasparente
+                    pixels[y * pitch + x] = 0x00000000
+        
+        # Aggiungi alcune gocce sparse intorno alla macchia principale
+        for _ in range(random.randint(3, 8)):
+            drop_x = center_x + random.randint(-max_radius - 5, max_radius + 5)
+            drop_y = center_y + random.randint(-max_radius - 5, max_radius + 5)
+            
+            if 0 <= drop_x < size and 0 <= drop_y < size:
+                drop_size = random.randint(1, 3)
+                for dy in range(-drop_size, drop_size + 1):
+                    for dx in range(-drop_size, drop_size + 1):
+                        nx, ny = drop_x + dx, drop_y + dy
+                        if 0 <= nx < size and 0 <= ny < size:
+                            if random.random() < 0.6:
+                                color = random.choice(blood_colors[:3])  # Colori più scuri per le gocce
+                                alpha = random.randint(100, 200)
+                                color = (color & 0x00FFFFFF) | (alpha << 24)
+                                pixels[ny * pitch + nx] = color
+        
+        # Sblocca la superficie
+        sdl2.SDL_UnlockSurface(blood_surface)
+        
+        # Converte la superficie in una texture usando il factory del gioco
+        return blood_surface
+
+    def draw_blood_surface(self, blood_surface, position):
+        # Create a new surface for the blood texture since bg_surface may have been freed
+        temp_surface = sdl2.SDL_CreateRGBSurface(0, self.cell_size, self.cell_size, 32, 0, 0, 0, 0)
+        if temp_surface is None:
+            sdl2.SDL_FreeSurface(blood_surface)
+            return None
+        
+        # Copy the blood surface to the temporary surface
+        sdl2.SDL_BlitSurface(blood_surface, None, temp_surface, None)
+        sdl2.SDL_FreeSurface(blood_surface)
+        
+        # Create texture from the temporary surface
+        texture = self.factory.from_surface(temp_surface)
+        sdl2.SDL_FreeSurface(temp_surface)
+        return texture

rats.py

@@ -50,6 +50,8 @@ class MiceMaze(
         return configs
     
     def start_game(self):
+        self.blood_stains = {}
+        self.background_texture = None
         for _ in range(5):
             self.spawn_rat()
     

units/bomb.py

@@ -71,14 +71,12 @@ class Timer(Bomb):
                     for victim in self.game.unit_positions.get((x, y), []):
                         if victim.id in self.game.units:
                             if victim.partial_move >= 0.5:
-                               print(f"Victim {victim.id} at {x}, {y} dies")
                                victim.die(score=score)
                                if score < 160:
                                    score *= 2                              
                     for victim in self.game.unit_positions_before.get((x, y), []):
                         if victim.id in self.game.units:
                             if victim.partial_move < 0.5:
-                                print(f"Victim {victim.id} at {x}, {y} dies")
                                 victim.die(score=score)
                                 if score < 160:
                                     score *= 2

units/rat.py

@@ -91,11 +91,17 @@ class Rat(Unit):
     def die(self, unit=None, score=10):
         """Handle rat death and spawn points."""
         target_unit = unit if unit else self
+        death_position = target_unit.position_before
+        
         # Use base class cleanup
         if target_unit.id in self.game.units:
             self.game.units.pop(target_unit.id)
+        
         # Rat-specific behavior: spawn points
-        self.game.spawn_unit(Point, target_unit.position_before, value=score)
+        self.game.spawn_unit(Point, death_position, value=score)
+        
+        # Add blood stain directly to background
+        self.game.add_blood_stain(death_position)
 
     def draw(self):
         start_perf = self.game.render_engine.get_perf_counter()

units/unit.py

@@ -64,7 +64,7 @@ class Unit(ABC):
         """Handle collisions with other units. Default implementation does nothing."""
         pass
 
-    def die(self):
+    def die(self, score=None):
         """Remove unit from game and handle basic cleanup."""
         if self.id in self.game.units:
             self.game.units.pop(self.id)