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In pygame we always pass positions as an (X,Y) coordinate. This represents the number of pixels to the right, and the number of pixels down to place the image. The top-left corner of a Surface is coordinate (0, 0). Moving to the right a little would be (10, 0), and then moving down just as much would be (10, 10).
The simplest way to do it would be to have a function to convert coordinates, and use it just before drawing any object. This will take your coordinates and convert them into pygame's coordinates for drawing, given height , the height of the window, and coords , the top left corner of an object.
I've been using PyGame for a while and I have had to make coordinate transformations to change the normal coordinate system used in mathematics (with its origin at the bottom-left corner) to the PyGame coordinate system (with its origin at the top-left corner). I found this post very useful for that.
But I am wondering, why is PyGame using this odd coordinate system?
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