Ball

import pygame
import random

SCREEN_WIDTH = 1024
SCREEN_HEIGHT = 800
vec = pygame.math.Vector2

class Ball(pygame.sprite.Sprite):
    def __init__(self):
        super(Ball, self).__init__()
        self.surf = pygame.image.load("images/ball.png")
        self.resetPosition()
        self.r = 16
        self.lost = False

    #resetowanie pozycji
    def resetPosition(self):
        self.position = vec(SCREEN_WIDTH/2, SCREEN_HEIGHT-140)
        self.rect = self.surf.get_rect(center=self.position)
        self.vel = vec(0, -10)
        self.angle = random.randrange(-30, 30)
        self.vel.rotate_ip(self.angle)
        self.lost = False

    #aktualizacja
    def update(self, pad, bricks):
        self.position += self.vel
        self.rect.center = self.position
        self.checkCollision(pad, bricks)

    #sprawdz wszystkie mozliwe kolizje
    def checkCollision(self, pad, bricks):
        #krawedzie ekranu
        if self.rect.x <= 0:
            self.vel.x *= -1
        if self.rect.right >= SCREEN_WIDTH:
            self.vel.x *= -1
        if self.rect.top <= 0:
            self.vel.y *= -1
        if self.rect.bottom >= SCREEN_HEIGHT:
            self.lost = True

        #kolizja z platforma
        if self.rect.colliderect(pad.rect):
            self.vel.y *= -1
            self.vel.x += pad.moving*5
            if self.vel.x < -10: self.vel.x = -10
            if self.vel.x > 10: self.vel.x = 10

        #kolizja z klockami
        for brick in bricks:
            #nastapila kolizja
            if self.detect_collision(self, brick):
                brick.hit()
                break

    #funkcja pomocnicza do kolizji z klockami
    def detect_collision(self, ball, brick):
        xDist = abs(ball.rect.centerx - brick.rect.centerx) - brick.rect.w / 2
        yDist = abs(ball.rect.centery - brick.rect.centery) - brick.rect.h / 2

        if xDist < ball.r and yDist < ball.r:
            if xDist < yDist:
                self.vel.y *= -1
            else:
                self.vel.x *= -1
            return True
        return False