Doxa: Before and After

Friday, February 10, 2023

Before and After

I have been asked about removing things in pygame. One uses the built-in Sprite class.

Below, from an geeksforgeeks example:

https://www.geeksforgeeks.org/pygame-creating-sprites/

mport pygame
import random

# GLOBAL VARIABLES ARE CAPITALIZED
COLOR = (255, 100, 98)
SURFACE_COLOR = (167, 255, 100)
WIDTH = 500
HEIGHT = 500

# Creation of Object class. Where object color is the same as surface color,
# the pixels will be transparent
class Sprite(pygame.sprite.Sprite):
    def __init__(self, color, height, width):
        super().__init__()

        self.image = pygame.Surface([width, height])
        self.image.fill(SURFACE_COLOR)
        self.image.set_colorkey(COLOR)

        pygame.draw.rect(self.image, color, pygame.Rect(0, 0, width, height))

        self.rect = self.image.get_rect()

#Starting an actual game. It is a good idea to call quit on pygame before exit on the OS.
pygame.init()

RED = (255, 0, 0)

size = (WIDTH, HEIGHT)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Creating Sprite")

all_sprites_list = pygame.sprite.Group()

object_ = Sprite(RED, 20, 30)
object_.rect.x = 200
object_.rect.y = 300

all_sprites_list.add(object_)

exit = True
clock = pygame.time.Clock()

#Removing an individual sprite from its sprite group removes it from the game.
while exit:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit = False
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                all_sprites_list.remove(object_)

    all_sprites_list.update()
    screen.fill(SURFACE_COLOR)
    all_sprites_list.draw(screen)
    pygame.display.flip()
    clock.tick(60)

pygame.quit()