Re: [pygame] Rects and they handle right and bottom borders

[Greg Ewing <greg.ewing@xxxxxxxxxxxxxxxx>]

Brian Fisher wrote:
> I don't know why rect was set up that way, but one good thing about
> the way right & bottom relate to width, is that right = left + width
> and bottom = top + height

It's useful for much the same reasons that Python's slice
indexing convention is useful. For example, if you're
filling two adjacent rectangles, you can make
r2.left = r1.right and they will fit together properly.

There's another way of thinking about this that you may
find less confusing. Instead of labelling the pixels,
think of the coordinates as labelling infinitely thin
lines *between* the pixels. Then everything makes
sense.

--
Greg