[英]Python / Pygame - How to blit different transparencies onto an invisible surface
I was wondering if it is possible to blit two images with let's say 120 and 200 alpha on to a surface with 0 alpha. 我想知道是否有可能将两个图像用120和200 alpha映射到0 alpha的表面上。
For example: 例如:
Here are all my variables 这是我所有的变量
game_display = pygame.display.set_mode((1280, 720))
transparent_display = pygame.Surface((1280, 720), pygame.SRCALPHA)
transparent_display.set_alpha(0)
object1 = pygame.Surface((100, 100))
object1.fill((255, 0, 0))
object2 = pygame.Surface((150, 50))
object2.fill((0, 0, 255))
Now I want to make a single surface (image) with all the components added into it (I want them all on one surface so I don't have to load each surface each game loop cycle) 现在,我要制作一个添加了所有组件的单一表面(图像)(我希望将它们全部都放在一个表面上,因此不必在每个游戏循环中都加载每个表面)
transparent_display.blit(object1, (0, 0))
transparent_display.blit(object2, (50, 50))
game_display.blit(transparent_display, (0, 0)
I apologize as I do not have very much knowledge on the subject of alphas with surfaces in pygame. 我很抱歉,因为我对pygame中带有表面的alpha知识了解不多。 Also, I know to update the screen and everything, that is not the issue.
另外,我知道要更新屏幕和所有内容,这不是问题。
(comment below if something isn't clear enough and I will elaborate) (下面的注释,如果有些不清楚的地方,我会详细说明)
Just set the alpha values of the two objects and your code should work. 只需设置两个对象的alpha值,您的代码就可以工作。
object1.set_alpha(120)
object2.set_alpha(200)
# Then blit them onto `transparent_display`.
Note that set_alpha
doesn't work with per-pixel alpha surfaces (images loaded with .convert_alpha()
or surfaces to which you passed pygame.SRCALPHA
), but you can still blit transparent surfaces onto these per-pixel alpha surfaces. 请注意,
set_alpha
不适用于按像素的Alpha曲面(加载有.convert_alpha()
或传递pygame.SRCALPHA
曲面的pygame.SRCALPHA
),但是您仍可以将透明曲面pygame.SRCALPHA
到这些按像素的alpha曲面上。
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