player.py

import pygame
from bullet import Bullet
from circleshape import CircleShape
from constants import PLAYER_RADIUS, PLAYER_COLOR, PLAYER_WIDTH, PLAYER_TURN_SPEED, PLAYER_MOVE_SPEED, BULLET_RADIUS, BULLET_SPEED, BULLET_RATE_OF_FIRE

class Player(CircleShape):
    def __init__(self, x, y):
        super().__init__(x, y, PLAYER_RADIUS)
        self.rotation = 0
        self.__shot_timer = 0

    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, PLAYER_COLOR, self.triangle(), PLAYER_WIDTH)

    def update(self, delta_time):
        keys = pygame.key.get_pressed()

        if keys[pygame.K_LEFT]:
            self.rotate(-delta_time)

        if keys[pygame.K_RIGHT]:
            self.rotate(delta_time)

        if keys[pygame.K_UP]:
            self.move(delta_time)

        if keys[pygame.K_DOWN]:
            self.move(-delta_time)

        self.decreaseShotTimer(delta_time)
        if keys[pygame.K_SPACE]:            
            self.shoot()        
        
    def rotate(self, delta_time):
        self.rotation += PLAYER_TURN_SPEED * delta_time

    def move(self, delta_time):
        forward = pygame.Vector2(0, 1).rotate(self.rotation)
        self.position += forward * PLAYER_MOVE_SPEED * delta_time

    def shoot(self):       
        if self.__shot_timer <= 0: 
            bullet = Bullet(self.position.x, self.position.y, BULLET_RADIUS)
            bullet.velocity = pygame.Vector2(0, 1).rotate(self.rotation) * BULLET_SPEED        
            self.setShotTimer(BULLET_RATE_OF_FIRE)

    def setShotTimer(self, delta_time):
        self.__shot_timer = BULLET_RATE_OF_FIRE

    def decreaseShotTimer(self, delta_time):
        self.__shot_timer -= delta_time