Adding Player, movement, and drawing/updating functionality

player.py

@@ -0,0 +1,39 @@
+import pygame
+from circleshape import CircleShape
+from constants import PLAYER_RADIUS, PLAYER_TURN_SPEED, PLAYER_SPEED
+
+class Player(CircleShape):
+    def __init__(self, x, y):
+        super().__init__(x, y, PLAYER_RADIUS)
+        self.rotation = 0
+
+    def rotate(self, dt):
+        self.rotation += PLAYER_TURN_SPEED * dt
+
+    def move(self, dt):
+        forward = pygame.Vector2(0, 1).rotate(self.rotation)
+        self.position += forward * PLAYER_SPEED * dt
+
+    def update(self, dt):
+        keys = pygame.key.get_pressed()
+
+        if keys[pygame.K_a]:
+            self.rotate(dt)
+        if keys[pygame.K_d]:
+            self.rotate(-dt)
+        if keys[pygame.K_w]:
+            self.move(dt)
+        if keys[pygame.K_s]:
+            self.move(-dt)
+
+    # in the player class
+    def triangle(self):
+        forward = pygame.Vector2(0, 1).rotate(self.rotation)
+        right = pygame.Vector2(0, 1).rotate(self.rotation + 90) * self.radius / 1.5
+        a = self.position + forward * self.radius
+        b = self.position - forward * self.radius - right
+        c = self.position - forward * self.radius + right
+        return [a, b, c]
+    
+    def draw(self, screen):
+        pygame.draw.polygon(screen, "white", self.triangle(), 2)