feat: add speedometer

src/game.py

@@ -1,3 +1,4 @@
+from math import cos, radians, sin
 import pygame
 
 from src.camera import Camera
@@ -29,6 +30,7 @@ class Game:
             str(ROOT / "assets" / "fonts" / "Ubuntu-M.ttf"), 20
         )
         self.show_fps: bool = True
+        self.show_speed: bool = True
 
     def mainloop(self):
         while self.running:
@@ -64,6 +66,8 @@ class Game:
         self.car.render(self.win, self.camera)
         if self.show_fps:
             self.render_fps()
+        if self.show_speed:
+            self.render_speedometer()
 
         pygame.display.flip()
 
@@ -76,6 +80,10 @@ class Game:
             self.car.left = True
         elif event.key == pygame.K_d:
             self.car.right = True
+        elif event.key == pygame.K_f:
+            self.show_fps = not self.show_fps
+        elif event.key == pygame.K_v:
+            self.show_speed = not self.show_speed
 
     def on_key_up(self, event: pygame.event.Event):
         if event.key == pygame.K_w:
@@ -92,3 +100,27 @@ class Game:
             f"{self.clock.get_fps():.1f}", True, self.FPS_COLOR
         )
         self.win.blit(txt, (self.win.get_width() - txt.get_width(), 0))
+
+    def render_speedometer(self):
+        if self.car.speed == 0:
+            return
+        angle: float = self.car.speed / self.car.MAX_SPEED * 180
+
+        pts1: list[tuple[float, float]] = []
+        pts2: list[tuple[float, float]] = []
+
+        n: int = 30
+        r: float = 50
+        ox: float = r + 10
+        oy: float = r + 10
+        thickness: float = 5
+        r2: float = r - thickness
+
+        for i in range(n):
+            a: float = radians(angle * i / (n - 1))
+            dx: float = -cos(a)
+            dy: float = -sin(a)
+            pts1.append((ox + r * dx, oy + r * dy))
+            pts2.append((ox + r2 * dx, oy + r2 * dy))
+
+        pygame.draw.polygon(self.win, (200, 200, 200), pts1 + pts2[::-1])

src/objects/road.py

@@ -28,8 +28,6 @@ class Road(TrackObject):
             p3: Vec = p1 - pt.normal * pt.width
             side1.append(camera.world2screen(p2))
             side2.append(camera.world2screen(p3))
-            col: tuple[float, float, float] = (i * 10 + 150, 100, 100)
-            pygame.draw.circle(surf, col, camera.world2screen(p1), 5)
 
         n: int = len(self.pts)
         for i in range(n):