如何在精灵上绘制精灵，以便在 pygame 中都能看到它们 [英] How to draw sprite on a sprite so that both of them will be seen in pygame

问题描述

我有两个精灵，其中一个是坦克精灵，另一个是保护精灵.我想在坦克精灵上绘制保护精灵.精灵图片如下:

I have two sprites one of them is a tank sprite the other is a protection sprite. I want to draw the protection sprite on the tank sprite. The images of the sprites are as follows:

当我在坦克精灵上绘制保护精灵时，结果如下:

When I draw the protection sprite on the tank sprite, the result is the following:

保护精灵的中心是空的(根据photoshop，我检查了多次).我使用以下代码作为保护精灵

Center of the protection sprite is empty (according to photoshop, I checked multiple times). I am using the following code for the protection sprite

self.image = pygame.transform.scale(
        pygame.image.load(os.path.join(imgFolderExp, "Powerups", "protection-3.png")).convert(), (40, 48))
self.image.set_colorkey((0, 0, 0))

我应该怎么做才能只画保护精灵的线条，以便在组合画的中间看到坦克?

What should I do in order to draw only the lines of the protection sprite so that in the middle of the combined draw, the tank will be seen?

推荐答案

PNGs像素阿尔法.没有必要设置颜色键.只需blit 坦克上的保护器.convert()将像素格式更改为没有每像素 alpha 的格式并删除透明度信息.使用 convert_alpha() 代替:

PNGs have per pixel alpha. It is not necessary to set a color key. Simply blit the protector on the tank. convert() changes the pixel format to a format without alpha per pixel and removes the transparency information. Use convert_alpha() instead:

filepath = os.path.join(imgFolderExp, "Powerups", "protection-3.png") 

protector_surf = pygame.image.load(filepath).convert_alpha()

self.image = pygame.transform.scale(protector_surf, (40, 48))

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