[fpc-pascal] X, Y co-ordinate system under OS/2

[Paul Nicholls]

----- Original Message ----- 
From: "Graeme Geldenhuys" <graemeg.lists at gmail.com>
To: "FPC-Pascal users discussions" <fpc-pascal at lists.freepascal.org>
Sent: Thursday, October 29, 2009 7:51 PM
Subject: Re: [fpc-pascal] X, Y co-ordinate system under OS/2


> On 29/10/2009, Juha Manninen <juha.manninen at phnet.fi> wrote:
>>
>> If done right, the code doing coordinate conversion should be in library
>>  Canvas class, not in application code.
>
> That's how I would have implemented in it fpGUI as well. The higher
> level code uses x, y as normal. The drawing backend code does
> conversions if needed.
>
> That's how I handle differences between Windows GDI API and XLib API.
>
> -- 
> Regards,
>  - Graeme -

Very good points, and I completely agree :)
I was only doing a quick "hack" so I could get something working in a short 
time ;)

BTW, I found these very interesting articles about IMGUI (Immediate Mode 
GUI) systems (which I am using in my game):

http://www.johno.se/book/imgui.html
http://sol.gfxile.net/imgui/index.html

and a forum about IMGUs
http://www.mollyrocket.com/forums/viewforum.php?f=10

Perhaps this might help someone, except maybe Graeme "fpGUI" Geldenhuys LOL! 
;P

cheers,
Paul