Re: [brlcad-devel] GCI: call for mentors

2013-10-21 Thread Matt Shepit
Technically I was a mentor last year, although my participation was rather minimal due to things going on here. I am much more available this year, and would love to participate if there is room for me! On Tue, Oct 22, 2013 at 7:18 AM, Vlad Bogolin wrote: > Hi, > > I would also be interested i

Re: [brlcad-devel] About surface-surface intersections - the current status and a question

2013-07-15 Thread Matt Shepit
. Or am I missing something? On Tue, Jul 16, 2013 at 3:52 PM, Bryan Bishop wrote: > On Mon, Jul 15, 2013 at 11:54 PM, Matt Shepit wrote: > >> I cannot access the paper, so I'm only guessing here to a large extent... >> >> http://libgen.org/scimag1/10.1016/S001

Re: [brlcad-devel] About surface-surface intersections - the current status and a question

2013-07-15 Thread Matt Shepit
I cannot access the paper, so I'm only guessing here to a large extent... However, would piecewise $C^\{infty}$ not be OK to work with in terms of an implementation? That is, if the contour had a fixed number of corners / cusps that were known a-priori, could you not then apply said algorithm betw

Re: [brlcad-devel] Fwd: [brlcad-users] Parallel g-stl conversion?

2013-04-09 Thread Matt Shepit
A piece of me wants to take this on, as it would be a good opportunity to learn some parallel processing skills, which has been on my todo list for a while now. Might go well, might not... Any pointers as to where a good starting point might be? On 10/04/2013 9:04 AM, "Christopher Sean Morrison"

Re: [brlcad-devel] So much activity!

2012-11-30 Thread Matt Shepit
gt; wiki here so it can be easily updated: > http://brlcad.org/wiki/Image:Affine_transformations.pdf > > That is a really awesome write-up! That'd even be great to have as a general > (i.e., non-GCI branded) docbook article... > > Cheers! > Sean > > > On Nov 30, 2012, at 8:34 PM,

Re: [brlcad-devel] GCI under way

2012-11-26 Thread Matt Shepit
Heya! OK, I've got on the mailing list and am quite happy to have you add me to all tasks as you have suggested in your previous email. Cheers! -Matt On Tue, Nov 27, 2012 at 8:14 AM, Christopher Sean Morrison wrote: > > On Nov 26, 2012, at 3:54 PM, Matt Shepit wrote: > >>

Re: [brlcad-devel] GCI under way

2012-11-26 Thread Matt Shepit
I've got a profile built now, so I can officially help out now :-) What do I need to do to get on the (correct) mentor list? -Matt On Tue, Nov 27, 2012 at 5:09 AM, Christopher Sean Morrison wrote: > > Hi folks, > > GCI officially started about an hour ago and we already have a few tasks > clai

Re: [brlcad-devel] Accepted for GCI!

2012-11-17 Thread Matt Shepit
I'm trying to register now, but I don't "get" what the first question is asking me for on this page: http://www.google-melange.com/gci/profile/mentor/google/gci2012 What am I being asked for when it's requesting a URL ID? -Matt On Wed, Nov 14, 2012 at 1:16 PM, Christopher Sean Morrison wrote:

[brlcad-devel] Another Idea for BRL-CAD and GCI 2012

2012-11-17 Thread Matt Shepit
One of the items that I needed to build into my workflow for a recent project was a function that could create a sketch fillet based on an input triple of points that define two line segments, the second point being the intersection coordinate. The fillet radius needs to be supplied as well of cou

Re: [brlcad-devel] approximating bezier curves with circular arcs

2012-07-15 Thread Matt Shepit
Heya! I've just started looking at this now, so I'll have a read through it in the next day or so and hopefully be able to provide some useful feedback. Great work! -Matt- On Sat, Jul 14, 2012 at 12:16 PM, crdueck wrote: > hello everyone, > > as of r51503 i've added functions to librt/primiti

Re: [brlcad-devel] triangulation/tesselation of a sketch primitive

2012-07-10 Thread Matt Shepit
Hi Chris, That seems like it will work, but I'm not sure I "get" the reasoning behind your proposed step 2. That is, once you have the B-spline chopped up into a bunch of circular arcs, why not simply use the algorithm Sean proposed to tesselate the area via the critical points on the contour? S

Re: [brlcad-devel] triangulation/tesselation of a sketch primitive

2012-07-07 Thread Matt Shepit
On Sun, Jul 8, 2012 at 9:34 AM, Christopher Sean Morrison wrote: > > > Hi Matt, sorry for calling your Mark. :) > Yeah, I'm horribly offended :-) > > If I were implementing it, as a first stab I'd probably walk the curve, > identify direction changes, divide up into cells accordingly like was do

Re: [brlcad-devel] triangulation/tesselation of a sketch primitive

2012-07-07 Thread Matt Shepit
On Sun, Jul 8, 2012 at 3:27 AM, Christopher Sean Morrison wrote: > > > Using the example sketch from the CGM manual Mark linked, here's a > pictorial diagram of what I was suggesting: > > Hi Sean, That does indeed make sense and looks quite simple! However, I'm not quite seeing how this would wor

Re: [brlcad-devel] triangulation/tesselation of a sketch primitive

2012-07-07 Thread Matt Shepit
On Sat, Jul 7, 2012 at 10:57 PM, Matt Shepit wrote: > > In the meantime, I think this is the book I was thinking of: > > > http://perso.uclouvain.be/vincent.legat/teaching/data/meca2170-GmshCompanion.pdf > > Looking at it now, this may or may not be it. > > -Matt- >

Re: [brlcad-devel] triangulation/tesselation of a sketch primitive

2012-07-07 Thread Matt Shepit
On Sat, Jul 7, 2012 at 8:45 PM, Tom Browder wrote: > > I believe that if you think of positive and negative areas it may > work. Each "triangle" is formed by either clockwise or > counterclockwise movement to the next vertex. If we consider > counterclockwise movement as positive then the sum o

Re: [brlcad-devel] triangulation/tesselation of a sketch primitive

2012-07-06 Thread Matt Shepit
a look on monday if you don't have something sorted by then. In the meantime I'll have a bit of a think... On Jul 7, 2012 2:16 PM, "crdueck" wrote: > that's correct, which is why it wouldnt work on a dumbell shaped sketch > for example. > > On 07/06/2012 11

Re: [brlcad-devel] triangulation/tesselation of a sketch primitive

2012-07-06 Thread Matt Shepit
Hi Chris, I think what you have described would only work if the sketch described a region that was strictly convex, which is a rather large restriction... -Matt- On Sat, Jul 7, 2012 at 1:01 PM, crdueck wrote: > hello all, > > I've begun working on an analysis function for the sketch primitive

[brlcad-devel] OpenCASCADE licence?

2012-06-18 Thread Matt Shepit
Hello! I found an explanation for this quite some time ago, but now cannot seem to do so. I know that that OpenCASCADE's licence is not compatible with BRL-CAD, but I can't seem to find the reasoning why this is. Does anybody know why exactly this is? Thanks! -Matt- ---

Re: [brlcad-devel] Revolve primitive and hyperbolas...

2011-10-11 Thread Matt Shepit
people > there too ;). We are happy that you want to take up this task. > > > Daniel > > > > 2011/10/10 Matt Shepit : > > Hi Daniel, > > Thanks, that fixes that. As for those functions being "yours" I thought > > that you developed the code for th

Re: [brlcad-devel] Revolve primitive and hyperbolas...

2011-10-10 Thread Matt Shepit
d) > - . is the usual product where every vector-entry > get multiplied with the scalar > > > Regards >Daniel > > > > PS: I didn't know that ell.c or ehy.c are "mine" but there's always > something new to learn ;-) > > 2011/10/9 Ma

Re: [brlcad-devel] Revolve primitive and hyperbolas...

2011-10-08 Thread Matt Shepit
Hi Daniel, To make sure I'm working on the same page as what's been done, I'm going through your functions ell.c and ehy.c. I *think* I've got the same result as you, but I'm not totally sure as I don't follow one step in the preamble. In particular, you have made the statement: ...consider the

Re: [brlcad-devel] Revolve primitive and hyperbolas...

2011-10-05 Thread Matt Shepit
Drats! OK, I guess the first step is to then go back to first principles and figure it out for myself... Oh well, recreational geometry is really not what I would consider a chore :) -Matt- On Wed, Oct 5, 2011 at 4:45 PM, Christopher Sean Morrison wrote: > > On Oct 5, 2011, at 11:54 AM, Daniel

[brlcad-devel] Revolve primitive and hyperbolas...

2011-10-04 Thread Matt Shepit
Hi all, I've decided to try my hand at completing this feature, mostly because I could really use it myself. The problem I'm having with it at the moment is that I don't quite "get" the motivation behind the projective algorithm(s) employed in the object thus far. That is, I can follow the math,