.

kart.py

@@ -0,0 +1,51 @@
+from typing import Self, override
+
+import items
+import pygame
+from input import Input
+from items import Item
+from pygame.math import clamp
+
+Vec2 = pygame.Vector2
+
+class Kart:
+    def __init__(self, name: str, pos: Vec2, vel: Vec2, dir: float, speed_max: float):
+        self.name: str = name
+        self.pos: Vec2 = pos
+        self.vel: Vec2 = vel
+        self.dir: float = dir
+        self.speed_max: float = speed_max
+
+    @override
+    def __str__(self) -> str:
+        return f"Kart {{ name: {self.name}, pos: {self.pos}, vel: {self.vel}, dir: {self.dir}, speed_max: {self.speed_max}}}"
+
+    def tick(self, input: Input):
+        input_x = input.horizontal()
+        input_y = input.vertical()
+        assert abs(input_x) < 1
+        assert abs(input_y) < 1
+
+        acc_amount = input_y * 2
+        self.vel += Vec2(acc_amount, 0).rotate(self.dir)
+        steer = input_x * 2
+        self.dir += steer
+
+        self.vel.clamp_magnitude_ip(self.speed_max)
+        self.pos += self.vel
+
+    def ram(self, other: Self):
+        """
+        swap the two kart's velocities (not physically accurate)
+        """
+        temp = self.vel
+        self.vel = other.vel
+        other.vel = temp
+
+    def consume_item(self, item: Item):
+        if item.kind == items.ITEM_BANANA:
+            self.speed_max += 1
+        elif item.kind == items.ITEM_BANANA:
+            self.speed_max -= 1
+
+        self.speed_max = clamp(self.speed_max, 0, 100)