Re: Handle graphics plotting functions

[Bill Denney]

On Mon, 27 Feb 2006, Sebastien Loisel wrote:

> Bill,
>
> I've been watching your spec and stuff, although not in detail because I 
> don't have the time, but to see if my low-level graphics functions would 
> suffice, and so far I have found one design error, which I have fixed.

Did you mean that you noticed a design error in the spec or your design? 
I'm assuming your design since you fixed it and I haven't seen any changes 
on the wiki other than my own.  If this is the case, I'm glad that I could 
help.

> As a follow-up to this:
>
> On 2/14/06, Bill Denney <address@hidden> wrote:
> > I would be willing to help with this, but I don't know if I'd be able to
> > do it all.  I'll start looking through the list to find old message of
> > what all handle graphics would need to provide and what has been done.
> >
> > Bill
> >
> > On Tue, 14 Feb 2006, Sebastien Loisel wrote:
> >
> > > I can't promise anything but I might look at working on my plotter 
> > > this weekend. What I would like is to do the C++ and for someone to 
> > > pick up the .m side of things, which looks like a match for what 
> > > you're asking.
>
> I'm going to release 0.10 at some point this week. It is much more 
> usable than 0.9, and most importantly it has a lot of the 2d plotting 
> capabilities you would need to implement Graphics Objects, and these 
> facilities will be documented, and a .m demo will be included. I think 
> these facilities should be enough to implement nearly all of the 2d 
> objects and properties you have listed on 
> http://wiki.octave.org/wiki.pl?ObjectGraphics
>
> Do you want to start coding .m?

I would be happy to; I've been wanting a reference implementation to make 
sure that everything that should be in the spec is.  The only thing I'll 
have to ask for is a compiled version of workshop-- preferably for windows 
(I've never had good luck compiling things from scratch though I am 
planning to learn soon).

Speaking of just being able to implement 2d.  I was thinking of making a 
3d to 2d flattener (is there a better word for it).  To do this, I was 
wondering if anyone has a suggestion on how to efficiently determine if an 
object is completely obstructed by objects in front of them?  Also, is 
there a good method to definitively determine an order of triangles from 
farthest to closest (would distance to the closest vertex work in all 
cases)?

Bill

--
"What's blue and square? An orange in disguise."  -- unknown