suggested changes for mouse position how to from discord

[BMaxV]

https://discord.com/channels/524691714909274162/1057767450843824198/1211462257725145150

12:54 AM]Simulan:
                # get mouse data
                mouse_watch = base.mouseWatcherNode
                if mouse_watch.has_mouse():
                    pointer = base.win.get_pointer(0)
                    mouseX = pointer.get_x()
                    mouseY = pointer.get_y()

...is how I've been doing it for FPS
[12:57 AM]rdb: Er, you're mixing interfaces
[12:58 AM]rdb: Instead of checking has_mouse(), check pointer.in_window
[12:58 AM]rdb: Your code may occasionally behave erratically in some edge cases
[12:59 AM]Simulan: Hmm okay I'll check it out later
[1:07 AM]Simulan: So I suppose that should be:

                # get mouse data
                pointer = base.win.get_pointer(0)
                if pointer.in_window:
                    mouseX = pointer.get_x()
                    mouseY = pointer.get_y()

[rdb]

bad indent, needs another space on this line

Let's encourage pointer.x and pointer.y instead

Variable names should be all-lower-caps, so use mouse_x and mouse_y (or just x and y as in the original)