Re: [brlcad-devel] Help understanding code

[Vasco Alexandre da Silva Costa]

PS: I originally suggested the 'eto' primitive because it is useful to
design vehicle wheels. But other people who have been around here longer
than I have can better suggest you which primitives are most useful to
implement. Sean and Erik were my GSoC mentors last year. They should know
that better.

Regards,
-Vasco Costa

On Mon, Mar 7, 2016 at 7:30 PM, Vasco Alexandre da Silva Costa <
vasco.co...@gmail.com> wrote:

> On Mon, Mar 7, 2016 at 11:28 AM, Param Hanji 
> wrote:
>
>> Hi,
>>
>> I've managed to accelerate "librt/primitives/epa". I now need to create
>> an ID for it in "primitives/rt.cl". It's okay if I define it with ID 40
>> right(on line 94)?
>>
>> I've also made changes to "primitives/common.cl",
>> "librt/CMakeLists.txt", "primitives/primitive_util.c" and
>> "primitives/epa/epa.c". Are there any other changes required?
>>
>
> Not that I can think of. Test the code (e.g. inside mged type 'make epa
> epa'; then render it with 'rt' with and without OpenCL acceleration). Can
> you get us a screenshot?
>
> Once everything is working ok you can create a patch in unified diff
> format e.g. with 'diff -Nurd' and then submit it to the BRL-CAD patch
> tracker at:
> https://sourceforge.net/p/brlcad/patches/
>
> All the best,
> -Vasco Costa
>
>
>> And grep really helped. Thank you :)
>>
>> On Sun, Mar 6, 2016 at 5:20 AM Vasco Alexandre da Silva Costa <
>> vasco.co...@gmail.com> wrote:
>>
>>> PS: When I was starting out programming in this project I used the
>>> NetBeans IDE to browse the BRL-CAD source code so I could understand the
>>> code structure better. As a last resort grep is your friend...
>>>
>>> On Sat, Mar 5, 2016 at 10:25 PM, Vasco Alexandre da Silva Costa <
>>> vasco.co...@gmail.com> wrote:
>>>
 The primitives folder has the primitive implementation code. See
 librt/primitives/primitive_util.c for the OpenCL C calls proper.

 On Sat, Mar 5, 2016 at 7:10 AM, Param Hanji  wrote:

> Hello,
>
> I was going through the code in librt/primitives folder. The OpenCL
> specific code seems very unfamiliar to me.
>
> Granted I'm new to OpenCL and large open source projects like this
> one, I still find it harder to understand than what I expected.
>
> "ell.c" nor any of the other files here contain code to create and
> configure the OpenCL data structures(for device, kernel, context etc).
> There no function calls like clCreateContext, clGetPlatformIDs, 
> clGetDeviceIDs.
> The .cl file also doesn't have kernel functions as well. So I just
> don't know where to start.
>
> Is my working of knowledge of OpenCL wrong/outdated? Are there
> resources I can refer to? Any help would be great. Thank you for your 
> time!
>
> Best,
> Param Hanji
>



 --
 Vasco Alexandre da Silva Costa
 PhD in Computer Engineering (Computer Graphics)
 Instituto Superior Técnico/University of Lisbon, Portugal

>>>
>>>
>>>
>>> --
>>> Vasco Alexandre da Silva Costa
>>> PhD in Computer Engineering (Computer Graphics)
>>> Instituto Superior Técnico/University of Lisbon, Portugal
>>>
>>
>
>
> --
> Vasco Alexandre da Silva Costa
> PhD in Computer Engineering (Computer Graphics)
> Instituto Superior Técnico/University of Lisbon, Portugal
>



-- 
Vasco Alexandre da Silva Costa
PhD in Computer Engineering (Computer Graphics)
Instituto Superior Técnico/University of Lisbon, Portugal
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Re: [brlcad-devel] Help understanding code

[Vasco Alexandre da Silva Costa]

On Mon, Mar 7, 2016 at 11:28 AM, Param Hanji 
wrote:

> Hi,
>
> I've managed to accelerate "librt/primitives/epa". I now need to create an
> ID for it in "primitives/rt.cl". It's okay if I define it with ID 40
> right(on line 94)?
>
> I've also made changes to "primitives/common.cl", "librt/CMakeLists.txt",
> "primitives/primitive_util.c" and "primitives/epa/epa.c". Are there any
> other changes required?
>

Not that I can think of. Test the code (e.g. inside mged type 'make epa
epa'; then render it with 'rt' with and without OpenCL acceleration). Can
you get us a screenshot?

Once everything is working ok you can create a patch in unified diff format
e.g. with 'diff -Nurd' and then submit it to the BRL-CAD patch tracker at:
https://sourceforge.net/p/brlcad/patches/

All the best,
-Vasco Costa


> And grep really helped. Thank you :)
>
> On Sun, Mar 6, 2016 at 5:20 AM Vasco Alexandre da Silva Costa <
> vasco.co...@gmail.com> wrote:
>
>> PS: When I was starting out programming in this project I used the
>> NetBeans IDE to browse the BRL-CAD source code so I could understand the
>> code structure better. As a last resort grep is your friend...
>>
>> On Sat, Mar 5, 2016 at 10:25 PM, Vasco Alexandre da Silva Costa <
>> vasco.co...@gmail.com> wrote:
>>
>>> The primitives folder has the primitive implementation code. See
>>> librt/primitives/primitive_util.c for the OpenCL C calls proper.
>>>
>>> On Sat, Mar 5, 2016 at 7:10 AM, Param Hanji 
>>> wrote:
>>>
 Hello,

 I was going through the code in librt/primitives folder. The OpenCL
 specific code seems very unfamiliar to me.

 Granted I'm new to OpenCL and large open source projects like this one,
 I still find it harder to understand than what I expected.

 "ell.c" nor any of the other files here contain code to create and
 configure the OpenCL data structures(for device, kernel, context etc).
 There no function calls like clCreateContext, clGetPlatformIDs, 
 clGetDeviceIDs.
 The .cl file also doesn't have kernel functions as well. So I just
 don't know where to start.

 Is my working of knowledge of OpenCL wrong/outdated? Are there
 resources I can refer to? Any help would be great. Thank you for your time!

 Best,
 Param Hanji

>>>
>>>
>>>
>>> --
>>> Vasco Alexandre da Silva Costa
>>> PhD in Computer Engineering (Computer Graphics)
>>> Instituto Superior Técnico/University of Lisbon, Portugal
>>>
>>
>>
>>
>> --
>> Vasco Alexandre da Silva Costa
>> PhD in Computer Engineering (Computer Graphics)
>> Instituto Superior Técnico/University of Lisbon, Portugal
>>
>


-- 
Vasco Alexandre da Silva Costa
PhD in Computer Engineering (Computer Graphics)
Instituto Superior Técnico/University of Lisbon, Portugal
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Re: [brlcad-devel] Regarding OVG

[chintan zaveri]

Hey,
I have been studying NURBs, I think it has not been working with current
OGV, Can someone please tell me the details.
On Mar 7, 2016 2:07 PM, "chintan zaveri"  wrote:

> Hey Divam,
> Can you please guide me on the script part?
> As I deployed the app on ubuntu system, what issues you faced on freebsd?
>
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Re: [brlcad-devel] Introduction

[Jasvir Singh]

On Mon, Mar 7, 2016 at 7:43 AM, Daniel Roßberg
 wrote:
> A summary of the GSoC 2013 project can be found here:
> http://brlcad.org/wiki/User:Vladbogolin/GSoC2013/qt-display-manager
>
> Daniel

Thanks Daniel.

-- 
Jasvir Singh Grewal

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Re: [brlcad-devel] Introduction

[Jasvir Singh]

On Sun, Mar 6, 2016 at 10:11 AM, Inderpreet Singh  wrote:
> There's a high priority project for incorporating Qt with mged. I am
> eagerly waiting for that project to take it's shape. I don't know much
> about it but there has been some work done on incorporating Qt and the
> code is on Sourceforge. You can find more information in wiki and also
> communicating with the devs at IRC.

Thanks Inderpreet. I would love to work on your advice.

-- 
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[brlcad-devel] Interested in STEP Source Code Documentation under BRL-CAD [GSoc 2016]

[Manpreet Dhiman]

Hello,

My name is Manpreet Kaur pursuing Master of Computer Applications at
Guru Nanak Dev Engineering College, Ludhiana.

I have worked on Python , C++ and Doxygen. I have a good command on
Doxygen for Python and C++ languages.

I found Doxygen related project in GSoc under BRL-CAD. I read your
project idea for STEP Source Code Documentation. You require advance
feature of Doxygen in your project. So, I am interested to do work on
STEP Source Code Documentation project. As it is based on Doxygen. And
I deal with Doxygen to create documentation of Python, C++  project. I
did this 6 month ago. Now I want to do work on doxygen with advance
features that is discussed in STEP Source Code Documentation.

Please tell me what are your other requirements and guide me for the same.

Thank you,

-- 
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Gmail: manpreet9...@gmail.com.
Blog: https://manpreet9112.wordpress.com

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[brlcad-devel] About Plate Mode NURBS raytracing

[Bojian Wu]

Hi, I am a PhD student majoring in computer graphics, I am so interested in
Plate Mode NURBS raytracing and want to get involved in this project.

As suggested by @starseeker, I have tried to do raytracing with BoTs(a flat
plane with few trangles) both in plate mode and normal mode, yes, they are
different. After disscussing with @starseeker, I almost get the gist of
plate mode, it uses *thickness* to describe a kind of property of
infinitely thin surface, so when doing raytracing, we can get in/out hit
point. (Thanks for reminding me BRL-CAD is used for solid modeling, what we
want is a solid model but not a single surface.) Then, I follow the
code(rtshot.c) step by step, and have some problems listed as follows?

1. it seems to check the enclosure of surface at the beginning of
raytracing for BoTs, for example, if I want to add plate mode for NURBS, do
I need to check if the NURBS surface is closed first?

2. besides, I find that, for BoTs, the *thickness* for each triangle is the
same(self-defined by me cause I use obj-g to generate BRL-CAD database),
then I want to know do we need an adaptive method the define the
*thickness* with a given threshold, for example, considering different
surface area with different curvature, maybe we need to handle it
differently?

I also have tried 'extreme_ssi_test.g', this database consists two
non-closed NURBS surfaces, I try to use rtshot to do raytracing, but it
does not hit anything. I am a little bit confused, why can't we even get
one hit point?

Another example is 'brep_cobb', it consists six discreted NURBS surfaces
but contains a volume, I also do the same thing, but now I can get the hit
points(both in and out point). So from this, I mean, the closure of NURBS
surface is so important for raytracing scheme?

With @starseeker's suggestion and my own understanding, we have two methods
so far for NURBS plate mode raytracing. The first one is, after finishing
the first hit, along the ray direction and forwarding *thickness* distance
to get the second(out) hit point(Maybe it is similar to the operation of
BoTs). Another is the hit has a normal, and we can take the *thickness*
value and generate two new points, one back in the direction of surface
normal, and the other in the opposite direction normal, that is to say, the
hit point becomes a mid-point now.

And I am so interested in NURBS plate mode, so could you please give me
some suggestions? Or where can I start now? I know brep.cpp is a collection
of NURBS operations, maybe it is a good start.. Besides, could you give me
some hints on how to proceed and something that I need to pay attentions
to? Thanks.

Best,
Bojian
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Re: [brlcad-devel] Introduction

[Daniel Roßberg]

A summary of the GSoC 2013 project can be found here:
http://brlcad.org/wiki/User:Vladbogolin/GSoC2013/qt-display-manager

Daniel

2016-03-06 19:11 GMT+01:00 Inderpreet Singh :
> On Wed, Mar 2, 2016 at 10:57 AM, Jasvir Singh  wrote:
>> From last 2.5 years, I have been
>> working on Django, Python, C++ and Qt. Most of the time I work on web
>> applications and now I am trying my hands on web security. I
>
> There's a high priority project for incorporating Qt with mged. I am
> eagerly waiting for that project to take it's shape. I don't know much
> about it but there has been some work done on incorporating Qt and the
> code is on Sourceforge. You can find more information in wiki and also
> communicating with the devs at IRC.
>
> --
> Inderpreet Singh
>
> Ekoankar Sahai
> ishwerdas.com
> facebook.com/okayinder
> https://kippt.com/okayinder
>
> --
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Re: [brlcad-devel] google summer of code : Geometry Conversion Library

[Daniel Roßberg]

Margaret,

>> 1.  cat src/conv/conv_lib/Makefile (create a conv_lib directory for the
>> project)
>>> Note that we use the CMake build system, which you can read about online.
>>> Instead of putting build logic into Makefiles, we put the logic into
>>> CMakeLists.txt files and CMake gives us Makefiles, MS Studio Files, XCode
>>> files, ninja files, etc.
>
>  will investigate CMake online, should not be too hard, will first try to
> build all executables from source in Ubuntu 14.04, (I downloaded
> brlcad-7.24.2.tar.gz). Can you point me the documentation of the build
> process, such as : configure, make all, make install.

You should use our Subversion repository instead.  You can find a
short how-to together with some CMake build basics here:
http://brlcad.org/wiki/Building_from_SVN


Regards,
Daniel

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[brlcad-devel] (no subject)

[abanda ludovic]

Hello,
  I'm interested in the 2016 GSOC project "General Tree Walker".
I have good knowledge of c programming.
I will like to know if it is a  good/priority project or not!

Cheers!
Ludovic
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[brlcad-devel] Regarding OVG

[chintan zaveri]

Hey Divam,
Can you please guide me on the script part?
As I deployed the app on ubuntu system, what issues you faced on freebsd?
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