off track detection

.gitignore

@@ -0,0 +1 @@
+__pycache__/*

game.py

@@ -1,19 +1,8 @@
 #!/usr/bin/env python3.11
 import pygame
-from models import Car
+from models import Car, Background, Track
 from util import load_image
 
-class Background(pygame.sprite.Sprite):
-  def __init__(self, filename, location, size):
-    super().__init__()
-    self.image = load_image(filename)
-    self.image = pygame.transform.scale(self.image, size)
-    self.rect = self.image.get_rect()
-    self.rect.left, self.rect.top = location
-  
-  def draw(self, window):
-    window.blit(self.image, self.rect)
-
 class Window:
   def __init__(self, caption, size):
     self.caption = caption
@@ -25,6 +14,7 @@ class Window:
     self.screen = pygame.display.set_mode((self.size))
     self.clock = pygame.time.Clock()
 
+    self.track = Track('track_mask.png', [0, 0], size)
     self.car = Car(880, 300)
 
   def main_loop(self):
@@ -60,6 +50,7 @@ class Window:
 
   def _process_game_logic(self):
     self.car.update()
+    self.track.detectCar(self.car)
 
   def _draw(self):
     self.screen.fill((0, 0, 0))

models.py

@@ -1,8 +1,19 @@
 #!/usr/bin/env python3.11
-from pygame import Rect, Surface, SRCALPHA
+from pygame import Rect, Surface, SRCALPHA, mask, sprite
 from pygame.transform import rotate, scale
 from util import load_image
-import math, os
+import math
+
+class Background(sprite.Sprite):
+  def __init__(self, filename, location, size):
+    super().__init__()
+    self.image = load_image(filename)
+    self.image = scale(self.image, size)
+    self.rect = self.image.get_rect()
+    self.rect.left, self.rect.top = location
+
+  def draw(self, window):
+    window.blit(self.image, self.rect)
 
 class Car:
   def __init__(self, x, y):
@@ -15,9 +26,14 @@ class Car:
     self.height = img.get_width()
     self.x = x - self.width / 2
     self.y = y - self.height / 2
+
     self.rect = Rect(x, y, self.height, self.width)
     self.surface = Surface((self.height, self.width), SRCALPHA, 32).convert_alpha()
     self.surface.blit(img, (0, 0))
+    
+    self.mask = mask.from_surface(self.surface)
+    self.mask_image = self.mask.to_surface()
+
     self.angle = 180
     self.speed = 0
 
@@ -28,6 +44,22 @@ class Car:
   def draw(self, window):
     self.rect.topleft = (int(self.x), int(self.y))
     rotated = rotate(self.surface, self.angle)
+    self.mask = mask.from_surface(rotated)
+    self.mask_image = self.mask.to_surface()
     surface_rect = self.surface.get_rect(topleft = self.rect.topleft)
     new_rect = rotated.get_rect(center = surface_rect.center)
-    window.blit(rotated, new_rect.topleft)
+    window.blit(rotated, new_rect.topleft)
+
+class Track:
+  def __init__(self, filename, location, size):
+    self.image = load_image(filename).convert_alpha()
+    self.image = scale(self.image, size)
+    self.rect = self.image.get_rect()
+    self.rect.left, self.rect.top = location
+
+    self.mask = mask.from_surface(self.image)
+    self.mask_image = self.mask.to_surface()
+
+  def detectCar(self, car: Car):
+    if not self.mask.overlap(car.mask, (car.x, car.y)):
+      print('Off Track')