Tom Browder | 6 May 18:46 2015
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Graphics News: Method for Efficient Computation for Sub-surface Scattering of Light

Sean probably already knows about this (announced in today's ACM News):

  http://www.tuwien.ac.at/en/news/news_detail/article/9461/

The article says "Activision-Blizzard is already using this method.
The team is confident that the SSSS-method will soon be used in many
other applications too. The new method will be presented in the
journal 'Computer Graphics Forum', [sic] so all developers will be
free to use the new approach."

Warmest regards,

-Tom

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Milinda Fernando | 5 May 09:08 2015
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Fwd: [GSOC 2015][Getting Things Started with Step Viewer]


---------- Forwarded message ----------
From: Milinda Fernando <milindasf <at> gmail.com>
Date: 2015-05-05 0:08 GMT+05:30
Subject: [GSOC 2015][Getting Things Started with Step Viewer]
To: brlcad <brlcad-ee4meeAH724@public.gmane.org>


Hello Sean,

Can you please give me some directions to start the STEP Viewer [1] project. From where should I start? Is there any formal documentation to libdm and librt which I can read? Which IDE that I should use for developments. Can you please help me to get things started with. 

Any help/ suggestions are highly appreciated. 

Thank You.
--
Milinda Fernando.
Undergraduate Department of Computer Science and Engineering
University of Moratuwa
Sri Lanka.



--
Milinda Fernando.
Undergraduate Department of Computer Science and Engineering
University of Moratuwa
Sri Lanka.
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Ilinca Andrei | 4 May 22:38 2015
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Integrating a new lemon/re2c parser in BRL-CAD logic

Hello!

As pointed out by Clifford, I have been looking over src/libgcv/wfobj CMAKE and file structure. After some research, i have found the following:

it uses a perplex lexer and not a re2c, there is some re2c logic in BRL-CAD in other/stepcode/CMakeLists.txt but I don't understand it's purpose.

Secondly,  the CMakeLists.txt  in libgcv seems to be tied to the library, in other words I believe it creates a static library (.so).

I was trying to do some sort of pattern matching between my  Makefile
found below:

all: mycalc

mycalc: scanner.h parser.c
    g++ -o mycalc main.cc

parser.c: parser.yy
    lemon parser.yy

scanner.h: scanner.re
    re2c scanner.re > scanner.h

clean:
    rm -rf *.o parser.h parser.out parser.c scanner.h mycalc

.PHONY: all clean

and the BRL-CAD CMakeLists.txt

How could I develop a CMakeLists file for my new parser in an incremental manner, I'm having trouble understanding the whole file at once?

Do you think it's a good idea to set a meeting on IRC on a time frame favorable for everyone? Any other ideas?


Thank you,
Andrei Ilinca
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Kalpit Thakkar | 3 May 11:15 2015
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Some Questions and Suggestions

Hello Daniel!

I wanted to discuss about the approach that could be followed in enhancing the Geometry Engine by adding the support for Volume, Centroid and Surface Area callbacks for primitives. 
As we had talked before, it could be a general method or it can be implementing the missing functions in librt. In any case, combinations *MUST* be entailed and hence general method seems to be the better choice. 
However, I would like to discuss the pros and cons of the general method and about where to look so that I can understand it nicely. 
Please suggest a time when we can meet up on IRC and discuss the same. 

About the interaction schedule : I think it'll be great if we can meet up on IRC atleast twice a week when I'll update you with the progress and discuss about the difficulties faced. I suggest Monday and Friday. Ofcourse, you can always check the development log (http://brlcaddev.wordpress.com) whenever required.

About the commit access : I promised you that I would merge the Pipe implementation done by Andrei Popescu. I have applied the indentation rules on the test files and the final patch is ready. I'll upload it and after reviewing, if it's ready for merging, it'll be a delight. So, please tell me what to do about it.

Last but not the least : I feel privileged to have this opportunity. I'm glad I now have a real chance to make a difference. Muchas Gracias :D

With Regards,
Kalpit Thakkar

"Everyone is born with creativity. The real challenge is to keep it alive."


--
With Regards,
Kalpit Thakkar
B.Tech in Computer Science And Engineering
International Institute of Information Technology, Hyderabad
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Christopher Sean Morrison | 2 May 19:40 2015
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Re: [BRL-CAD Website Contact] Installation Error Message


On May 2, 2015, at 11:09 AM, goofusrufus@... wrote:

> Doug (goofusrufus@...) sent a message using the contact form at
> http://brlcad.org/d/contact.
> 
> When I tried to install BRL CAD into C:\Program Files (x86\ I got this
> message: Error opening file for writing: C:\Program Files (x86)\BRL CAD
> 7.24.0\bin\3dm-g.exe  Click Abort to stop this installation, Retry to try
> again, or Ignore to skip this file.

Doug,

We’ve not seen this issue, but it could be a problem with the installer itself.  That tool is likely one of
the first to get installed and the parentheses might be causing problems.

As a temporary workaround, you could try installing into C:\Temp\BRL-CAD or some other simple path. 
We’ll look into this issue the next time we release.

Cheers!
Sean

cc brlcad-devel mailing list
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Ilinca Andrei | 30 Apr 14:04 2015
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Next Steps

Hello,


I am currently working on integrating the re2c lemon parser for CSG files into BRL-CAD but I could not find where the parser related files should be placed. The HACKING guide could not help me on this matter and the other BRL-CAD importers found in src/conv only have the c/c++ files in their respective folder. I would appreciate any help on this so I can make a patch submission soon with the OpenSCAD re2c lemon parser prototype.

Also, I'm not sure if the grammar I proposed for parsing group() is good yet so I would appreciate if anyone could review and help me out with this. parser here

As I mentioned in my proposal, my parser knowledge is limited to the research done in the past month. Is it ok if I ask here specific questions, as well as on OpenSCAD mailinglist and IRC ?

Izakey, as you required, I added some additional info the proposal abstract on melange. What do think ? direct link 


Kind Regards,
Andrei
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Shubham Chauhan | 29 Apr 09:02 2015
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GSoC'15: OGV Project Selection and Division of Work

Hi, 
First of all thank you for selecting my proposal for GSoC'15. It's a great opportunity for me to grow and develop my skills and contribute to the society.

I see that we have two students under the same OGV Project which is a great thing for the project to develop at a fast pace.
I think we should discuss how we are planning to go with the project, coordinating among the two of us, changing project timeline and aims. We would need to divide the TODO list, making a clear cut division of work, finalizing our proposals.

Thanks

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Christopher Sean Morrison | 28 Apr 05:11 2015
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GSoC 2015 selections announced!


Our GSoC 2015 participants were announced earlier today!  I’m excited by a number of projects this year,
which I admit is part of the reason we’ve accepted more than originally planned.  The short summary is
geometry converters for OpenSCAD, X3D, and Povray; web infrastructure enhancements to our
documentation and Online Geometry Viewer (OGV); overdue attention towards polygonal mesh geometries
(NMG), OO C++ geometry API, and OpenCL-based accelerated ray trace rendering.  This is in addition to the
projects selected for LibreCAD, OpenSCAD, STEPcode, and LinuxCNC (shared).  In all, 12 students.  

Please give these participants a warm welcome and help them become better familiarized with our code. 
There are several pending patches if anyone has time to spare for a review or three.  ;-)

STUDENTS: in addition to the checklist, please fill out your project details here:  http://brlcad.org/wiki/Google_Summer_of_Code/2015

Cheers!
Sean

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OpenCL RT Patches

Hello,
I made a couple of patches. One fixes compilation errors and refactors the OpenCL SPH (sphere) shot code. The other patch adds OpenCL EHY (Elliptical Hyperboloids) shot support. All of this code is located in librt.

https://sourceforge.net/p/brlcad/patches/341/
https://sourceforge.net/p/brlcad/patches/346/

PS: I am going to work on OpenCL RT support for GSoC 2015. So I don't know what is more viable, if someone will apply the patches for me, or if you give me commit access and then I commit them myself. I am experienced with using SVN. I used to be a Freeciv (FLOSS strategy game you can find on sf.net) maintainer.
sf.net user account: vasco_costa
brlcad.org wiki user account: vasco.costa

Kind regards,

--
Vasco Alexandre da Silva Costa
PhD Student at Department of Information Systems and Computer Science
Instituto Superior Técnico/University of Lisbon, Portugal
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Nihar Mehta | 27 Apr 21:38 2015
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GSOC Project

I am not selected for the project. But I want to contribute to it.How can I get the references? Whom should I contact for help because mentors will be busy in other projects?

--
Regards,
Nihar Mehta,
Second Year Undergraduate,
Dept of Mechanical Engineering,
IIT Bombay.
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Nihar Mehta | 26 Apr 21:28 2015
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GSOC PROJECT PATCH

I have applied for GSOC NURBS EDITING PROJECT.My exams are over. I am free now. I would like to work on a patch. Can somebody please assign me some work to which I can contribute to?

--
Regards,
Nihar Mehta,
Second Year Undergraduate,
Dept of Mechanical Engineering,
Minors in Computer Science
IIT Bombay.
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