[Opensim-dev] Math lib [Was:Thoughts on UUID]

[Teravus Ovares]

I had to do write my own a bit in the Meshmerizer helper objects to be able
to properly twist prim around the Z axis.    Just a fyi.   It really only
contains the operators and methods that I needed to do the twisting.   It
does Quaternion multiplication and vector translation based on a quaternion
(internally it uses a Matrix4).    The meshmerizer has been using the object
named Vertex in leau of Vector3 for some time now..   so for anything
Vector3, Vertex iused.

Best Regards

Teravus

On 4/11/08, Stefan Andersson <stefan at tribalmedia.se> wrote:
>
> Totally share your sentiment,
>
> but
>
> ideally, we don't want to introduce native/unsafe dlls into the project
>
> and,
>
> as you said, given that almost everyone gets to code one up (I've done it
> as well) it's amazing there seem to be no good safe c# libs out there
>
> really. Amazing.
>
> World, please prove me wrong?
>
> Best,
> Stefan
>
>
> ------------------------------
>
> > From: sempuki1 at gmail.com
> > To: opensim-dev at lists.berlios.de
> > Date: Fri, 11 Apr 2008 11:10:34 +0900
> > Subject: Re: [Opensim-dev] Thoughts on UUID
> >
> >
> > On Thu, 2008-04-10 at 16:21 +0200, Stefan Andersson wrote:
> > > Anybody up for hacking one together?
> >
> > Please god no.
> >
> > Linear Math libs are one of those things everyone writes at least once
> > in their life, at least for fun, and almost all of them are profoundly
> > flawed in some way. There are so many cases of people making versions
> > that are *done right* and stable and debugged, that it would be a shame
> > to quite literally re-invent the wheel.
> >
> > Worst case scenario you can bind on of the many c++ versions.
> >
> > http://sourceforge.net/projects/nmath
> > http://www.oonumerics.org/oon/
> >
> > > Best,
> > > /Stefan
> > >
> >
> > Cheers,
> > >
> > > ______________________________________________________________________
> > >
> > > > Date: Thu, 10 Apr 2008 09:30:35 -0400
> > > > From: sean at dague.net
> > > > To: opensim-dev at lists.berlios.de
> > > > Subject: Re: [Opensim-dev] Thoughts on UUID
> > > >
> > > > On Thu, Apr 10, 2008 at 10:23:11AM +0200, Stefan Andersson wrote:
> > > > > And, to nit-pick even more; it's NOT an UUID, it's a GUID. But
> > > that's
> > > > > kind of taken, so the pragmatic approach mould be UUID.
> > > > >
> > > > > Yeah, we own the namespace, let's call it an UUID. :D
> > > >
> > > > Fair enough, I suggested OSUUID because I was afraid we'd end up
> > > with
> > > > other software that wanted to call things UUID that we are working
> > > with,
> > > > and then you have to do that really silly namespace import thing to
> > > keep
> > > > symbols from clashing.
> > > >
> > > > > By the way, why we want to get away from LLUUID is because large
> > > parts
> > > > > of the codebase includes libsecondlife ONLY to get that datatype.
> > > > >
> > > > > depending on libsecondlife for something as central as ID handling
> > > > > leads to those assemblies being cumbersome to re-use in other
> > > settings
> > > > > (like, for example, when building web apps, standalone tools and
> > > > > supporting services - take the case of the UGAI; they really
> > > shouldn't
> > > > > need libsecondlife at all.)
> > > >
> > > > Yeh, LLUUID, LVector3, and LQuarternion make up 95% of our use of
> > > > libsecondlife. Having our own versions of those would make some
> > > sense,
> > > > and only use libsecondlife where we actually need it, in the packet
> > > > space.
> > > >
> > > > -Sean
> > > >
> > > > --
> > > > __________________________________________________________________
> > > >
> > > > Sean Dague Mid-Hudson Valley
> > > > sean at dague dot net Linux Users Group
> > > > http://dague.net http://mhvlug.org
> > > >
> > > > There is no silver bullet. Plus, werewolves make better neighbors
> > > > than zombies, and they tend to keep the vampire population down.
> > > > __________________________________________________________________
> > >
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