在与pygame碰撞时增加图片的大小?

时间:2018-10-08 20:26:52

标签: python pygame size

我有一个带有播放器(是图像)和矩形的程序,我希望当播放器与矩形发生碰撞时,图像的大小会增加。


现在,我有以下代码:

import pygame
from random import randint

WIDTH, HEIGHT = 800, 800
FPS = 60

pygame.init()

win = pygame.display.set_mode((WIDTH, HEIGHT))
fenetre_rect = pygame.Rect(0, 0, WIDTH, HEIGHT)
pygame.display.set_caption("Hagar.io")
clock = pygame.time.Clock()

bg = pygame.image.load("bg.png").convert()
bg_surface = bg.get_rect(center=(WIDTH / 2, HEIGHT / 2))
bg_x = bg_surface.x
bg_y = bg_surface.y
x_max = WIDTH / 2
y_max = HEIGHT / 2

# player
player = pygame.transform.scale(pygame.image.load("player.png").convert_alpha(), (i, i))
player_rect = player.get_rect(center=(x_max, y_max))

# cell
rect_surface = pygame.Rect(300, 500, 20, 20)

# Game loop
running = True
while running:
    dt = clock.tick(FPS) / 1000

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    if player_rect.colliderect(rect_surface):
        print("collide")

    bg_surface.x = bg_x
    bg_surface.y = bg_y

    # draw on screen
    win.blit(bg, bg_surface)
    pygame.draw.rect(win, (255, 0, 0), rect_surface)
    win.blit(player, player_rect)
    pygame.display.flip()

pygame.quit()

我尝试添加“ colliderect”条件,但是它不起作用:

player_rect.width += 1
player_rect.height += 1

感谢您的帮助!

1 个答案:

答案 0 :(得分:1)

此行

player = pygame.transform.scale(pygame.image.load("player.png").convert_alpha(), (i, i))

正在使用变量i,但未在代码中定义。我不确定在哪里定义,但这是您想要的关键。无论如何,我将尝试在没有此信息的情况下回答:

事情是,放大rect不会做任何事情,因为rect只是坐标。您必须缩放实际图像,pygame.transform.scale会做到这一点。

您可以将图像保留在单独的变量player_img中:

player_img = pygame.image.load("player.png").convert_alpha()
player = pygame.transform.scale(player_img, (i, i))

然后,当您想按不同比例缩放时,只需再次调用.scale()

double_size_player = pygame.transform.scale(player_img, (i*2, i*2))

这仍然使我们对您未定义的i变量感到迷惑,但我认为您已经明白了要点。请记住,您必须从缩放后的图像中提取一个新的rect,因为它会更大。