Drawing on a sprite surface in pygame

Question

I have several different classes that extend the Sprite pygame class, and initially I just created a Surge object for pygame using an external image and painted this image on my screen. I have large groups of these sprites, so I include them in the RenderClear group, and then just clear and draw the group for simplicity. This worked until I decided to draw my own graphics with pygame.

Instead of an external image, I create a Surface image and draw a circle on it:

pygame.draw.circle(self.image, self.color, (int(self.x), int(self.y)), self.radius, 0) 

However, the circle does not appear when I draw it on the screen. Nothing is visible, it's just a transparent surface.

I also tested drawing a circle right on the screen with the same parameters, and it works, but if I draw a sprite image, nothing. Any ideas?

Answer 1

You need to make the update method inside the classes, and then draw circles and stuff on the surface of the window inside the method. Then every time you draw a RenderClear group, call RenderClear.update () and it will draw whatever you want.