Re: [Gnuplot-info] maxima + gnupolot: 3D rendering bug?

[Stanislav M. <sta...@gm...>]

On Tue, Dec 07, 2010 at 09:39:05PM +0100, Hans-Bernhard Bröker wrote:
> On 07.12.2010 16:42, Stanislav Maslovski wrote:
> 
> >So, I solved this issue by patching pm3d.c:pm3d_depth_queue_flush()
> >so that sorting of quadrangles was done based on the average depth of
> >4 corners.
> 
> Unfortunately that's not really a solution.  There is no particular
> reason to prefer one sorting criterion over the other.  Painter's
> algorithm is plain and simply wrong --- no matter which property you
> sort by.  If it appears to work sometimes that's by happenstance, not
> by design.

Yes, I agree completely. "Solved" above meant that it helped me to
produce a reasonable result in a reasonable time, and nothing more.
>From what I have read from the docs it seems that the developers are
against of impelementing a better algorithm (I noticed a statement
like gnuplot is not a virtual reality software therefore...).

If that is the current position, then I think it would be reasonable
at least to make the depth sorting algorith configurable, do not you
think so?

-- 
Stanislav