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

2013-07-15 Thread Matt Shepit
Ah, brilliant! OK, taking a very quick look at that paper and what you say, I see I misunderstood your original question. My bad. However, I think the answer may be easier than what I was getting at, in that a polynomial curve is a $C^\{infty}$ structure already, so there is no problem at all.

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

2013-07-15 Thread Bryan Bishop
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/S0010-4485%252896%252900099-1.pdf - Bryan http://heybryan.org/ 1 512 203 0507 ---

[brlcad-devel] NURBS ray tracing thesis

2013-07-15 Thread Christopher Sean Morrison
I came across a 2004 thesis paper that I'd not seen that is a "little" relevant to our current development efforts: http://dcgi.felk.cvut.cz/home/havran/ARTICLES/EfremovMasterThesis.pdf His method is actually the classic decomposition of NURBS surfaces into sets of Bezier patches, which we int

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

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

2013-07-15 Thread phoenix
Hi! After several weeks' work on the surface-surface intersections, it's improved significantly and can handle lots of cases that cannot be handled well before. It's more accurate and correct, ready for the evaluation. (Other intersections such as curve-curve, curve-surface, point-point, point

Re: [brlcad-devel] Magic ID for pull routine

2013-07-15 Thread Christopher Sean Morrison
On Jul 15, 2013, at 4:54 PM, check.nyah wrote: > Today, I implemented the pull_leaf routine which forms a linked list of nodes > which will be used in mathematically restoring the original matrix > transformations of the pull. But I need to define a magic number for pull. So > I did a hexadeci

Re: [brlcad-devel] Hello

2013-07-15 Thread check.nyah
Well I worked today on building a linked list with pull_leaf() routine from the object's root and tomorrow will start working on the extracting the corresponding matrix transform for the basic matrices. On Mon, Jul 15, 2013 at 2:11 AM, Christopher Sean Morrison wrote: > > On Jul 14, 2013, at 3:

[brlcad-devel] Magic ID for pull routine

2013-07-15 Thread check.nyah
Today, I implemented the pull_leaf routine which forms a linked list of nodes which will be used in mathematically restoring the original matrix transformations of the pull. But I need to define a magic number for pull. So I did a hexadecimal conversion of 'pull' which gave 0x70756c6c. I wish know

Re: [brlcad-devel] [brlcad-commits] SF.net SVN: brlcad:[56016] brlcad/trunk/src/librt/primitives/rec/rec.c

2013-07-15 Thread Christopher Sean Morrison
Richard et al, I completely restructured the rec shot routine because I noticed several problems (new and old). My testing after changing it was very favorable, but please let me know if you find a problem. Right now, the main change was to always test intersections against the cylinder and

Re: [brlcad-devel] Build directory restriction macro

2013-07-15 Thread Christopher Sean Morrison
On Jul 15, 2013, at 7:32 AM, Tom Browder wrote: > I'm just suggesting the macro as a way to help new BRL-CAD builders > avoid the same mistake. I think it's good to make it not be a mistake. It's an entirely reasonable expectation and one step less if all you care about is a single compile.

Re: [brlcad-devel] Some Questions about Brlcad

2013-07-15 Thread Christopher Sean Morrison
On Jul 15, 2013, at 12:31 PM, Talwinder saini wrote: > I need it badly.Kindly refer me some book (if any) or any other > resource to under brlcad and its components. In addition to the documents on the website (in particular, the extensive introduction to mged), perhaps this old diagram helps u

Re: [brlcad-devel] Some Questions about Brlcad

2013-07-15 Thread Tom Browder
On Mon, Jul 15, 2013 at 11:31 AM, Talwinder saini wrote: > On Thu, Jul 4, 2013 at 11:00 PM, Talwinder saini > wrote: >> Can anyone refer me any document(s)/links that can help me in finding >> answers of above mentioned questions? > > I need it badly.Kindly refer me some book (if any) or any othe

Re: [brlcad-devel] Some Questions about Brlcad

2013-07-15 Thread Talwinder saini
On Thu, Jul 4, 2013 at 11:00 PM, Talwinder saini wrote: > Can anyone refer me any document(s)/links that can help me in finding > answers of above mentioned questions? I need it badly.Kindly refer me some book (if any) or any other resource to under brlcad and its components. -- Talwinder Saini

Re: [brlcad-devel] Build directory restriction macro

2013-07-15 Thread Clifford Yapp
Tom, That situation has changed since the early days of BRL-CAD's CMake build - in-src-dir building should now work. In fact, one of our distcheck-full builds now tests an in-src-dir build, not just for compilation and functionality but a working distclean target as well. Because of the introspe

Re: [brlcad-devel] Build directory restriction macro

2013-07-15 Thread Tom Browder
On Mon, Jul 15, 2013 at 6:24 AM, Daniel Roßberg wrote: > I thought I'm doing such an out of sources build all the time. Have > you used the CMake GUI? No, Daniel, I don't use the GUI, and I ALWAYS do an out-of-source build since my disastrous first cmake build a couple of years ago. I'm just su

Re: [brlcad-devel] Build directory restriction macro

2013-07-15 Thread Daniel Roßberg
I thought I'm doing such an out of sources build all the time. Have you used the CMake GUI? Daniel 2013/7/15 Tom Browder : > Since getting on the CMake band wagon and successfully (albeit newbie > crudely) converting a non-trivial project to CMake, I have been > looking for a macro to enforce b

[brlcad-devel] Build directory restriction macro

2013-07-15 Thread Tom Browder
Since getting on the CMake band wagon and successfully (albeit newbie crudely) converting a non-trivial project to CMake, I have been looking for a macro to enforce building out side a project's source directory. I found a user-contributed one that seems to be a reasonable start and I am experimen