feat: add basic game loop

src/game.py

@@ -1,9 +1,56 @@
 import pygame
 
+from src.camera import Camera
+from src.car import Car
+from src.track import Road, Track
+from src.vec import Vec
+
 
 class Game:
     DEFAULT_SIZE = (1280, 720)
+    BACKGROUND_COLOR = (80, 80, 80)
+    MAX_FPS = 60
 
-    def __init__(self):
+    def __init__(self) -> None:
         pygame.init()
-        self.win: pygame.Surface = pygame.display.set_mode(self.DEFAULT_SIZE)
+        self.win: pygame.Surface = pygame.display.set_mode(
+            self.DEFAULT_SIZE, pygame.RESIZABLE
+        )
+        pygame.display.set_caption("Rally Racer")
+        self.running: bool = True
+        self.track: Track = Track.load("simple")
+        self.car: Car = Car(self.track.start_pos, self.track.start_dir)
+        self.camera: Camera = Camera()
+
+        self.clock: pygame.time.Clock = pygame.time.Clock()
+
+    def mainloop(self):
+        while self.running:
+            self.process_pygame_events()
+            self.render()
+            self.clock.tick(60)
+
+    def process_pygame_events(self):
+        self.camera.set_pos(self.car.pos)
+        self.camera.set_direction(self.car.direction)
+        self.camera.set_size(Vec(*self.win.get_size()))
+        for event in pygame.event.get():
+            if event.type == pygame.QUIT:
+                self.quit()
+            elif event.type == pygame.VIDEORESIZE:
+                self.camera.set_size(Vec(event.w, event.h))
+            elif event.type == pygame.KEYDOWN:
+                if event.key == pygame.K_ESCAPE:
+                    self.quit()
+
+    def quit(self):
+        self.running = False
+
+    def render(self):
+        self.win.fill(self.BACKGROUND_COLOR)
+        road: Road = self.track.objects[0]  # type: ignore
+        for i, pt in enumerate(road.pts):
+            pos: Vec = self.camera.world2screen(pt.pos)
+            col: float = i * 10 + 150
+            pygame.draw.circle(self.win, (col, 100, 100), pos, 5)
+        pygame.display.flip()