Re: [AD] Patch for the documentation of polygon_z_normal()

[Andrei Ellman <ae-a-alleg@xxxxxxxxxx>]

Elias Pschernig wrote:
> On Tue, 2005-06-07 at 15:52 +0200, Andrei Ellman wrote:
> > I think that if I give an example for how to use the alternative method 
> > which does not use polygon_z_normal(), then it crosses the line for 
> > being part of the docs for polygon_z_normal(). Do you think that a 
> > discussion on back-face culling should go in the bit at the begining of 
> > the "3D math routines" section, or in the FAQ? Bear in mind that we 
> > probably don't want to turn the Allegro docs into a 3D-graphics tutorial.
>
>
> Hm, true. I think, back-face culling is something basic enough to
> include there though (as opposed to e.g. lighting). But don't know.

So should this go to the beginning of the "3D math routines" section, 
the FAQ, or elsewhere?


> In any case, don't forget to re-submit a patch for the polygon_z_normal
> docs with all the other things mentioned so far :)

OK. I'll do that once we've established where the docs about backface 
culling should go.


> An example like that certainly would be nice. I remember, something like
> that even was the example program Peter made for his Allegro 5 attempt
> back then :)

I think that instead of a new example, exzbuf.c would be a good 
candidate to modify, as that has two objects that are close to the 
screen but remain stationary. Would demonstrating two concepts 
(z-buffering and vertex-illumination) be too much for a single Allegro 
example?


AE.