Hello Charlie,
>>Milinda, did you get this email?
Yes I got this email. But I haven't enable the daily updates from the
stepcode dev group. (Now I have enabled it). So I didn't see the email
until now. Really sorry about that.
>> Please post the STEP files you are using, and inspect them to see what
kind of geometry they contain
Sure I will post the step files that I am using. I have pushed the step
files that I am using to my code repository[1]
Let me summarize you on what I am currently doing. Currently I am using
step2g converter to convert the .step file to .g file. Then I read the .g
file using db_open which returns the db_i* structure. Then I convert this
db_i* to rt_brep_internal* structure which can be used to get ON_Brep*
structure which means the boundary representation of the geometry. What you
see in the photos that I sent you is, I iterate each edge in the ON_Brep*
structure and draw each edge in the OpenGL viewer. Currently I
am modifying the step2g code in order to make a statically linked library
and I want to stop the conversion from .step to .g file. Instead of that I
want to convert . step file to binary file which resides in the memory.
Currently I have studies the *STEPWrapper::convert* method and I think we
can stop it from ON_Brep* structure. The only problem is when I compile the
edited step2g converter it mentions that SCHEMA_NAMESPACE is not defined. I
don't know where it is defined. Can you please help me with this?
>> Constructing solid geometry from wireframe geometry is something that I
think is outside the scope of a STEP viewer.
Okay. Then can you please explain me how we are going to get the solid
which can be rendered in OpenGL viewer (without libdm) from the ON_Brep
structure. ?
[1].
https://bitbucket.org/milindasf/stepviewer/src/9fa3a73b9c151dc520a9a94b173c7b5a5a2ae47d/STEP/?at=default
Thank You.
2015-06-28 12:46 GMT+05:30 Charlie Stirk <char...@costvision.com>:
> Milinda, did you get this email? Regards, Charlie
>
> ---------- Forwarded message ----------
> From: Charlie Stirk <char...@costvision.com>
> Date: Tue, Jun 23, 2015 at 12:03 PM
> Subject: Re: [scl-dev] Re: [GSOC2015][STEPViewer Project Progress]
> To: Scl Dev <scl-...@googlegroups.com>
>
>
> Hi Milinda,
>
> These screenshots look like wireframe geometry. STEP files can contain
> different shape representations for geometry, with or without topology,
> like wireframes or surfaces. STEP files can also contain advanced or
> faceted b-rep.
> http://www.wikistep.org/index.php/AP203ed2_conformance_classes
> There is also a newer lightweight tesselated representation in STEP.
>
> Please post the STEP files you are using, and inspect them to see what
> kind of geometry they contain. Here is a good library of different STEP
> files with different types of geometry.
> http://www.steptools.com/support/stdev_docs/stpfiles/ap203/
>
> Constructing solid geometry from wireframe geometry is something that I
> think is outside the scope of a STEP viewer.
>
> Regards, Charlie
>
> On Tue, Jun 23, 2015 at 8:53 AM, Milinda Fernando <milind...@gmail.com>
> wrote:
>
>> Hello Charlie,
>>
>> As Sean has mentioned I have converted .step to .g and read the .g file
>> iterated the edges of the .g file and visualized it in the OpenGL view. Now
>> we have a wire frame like view in the OpenGL viewer[1][2][3]. (see the
>> links for the images). In my point of view I think we have 2 main tasks.
>>
>> - To modify the STEP2G lib to stop at memory residing binary format
>> (format 3)
>> - To construct the solid model form the brep elements. Do we have
>> some shortcut to his. ? Like we get brlcad solid and convert to OpenGL
>> solid type. Any suggestions ?
>>
>> Any suggestions on what to proceed with ?
>>
>> [1].
>> https://bitbucket.org/milindasf/stepviewer/src/f888657ba24b0a1e7cfe9b6de27b6d356089ab22/images/step1.png?at=default
>> [2].
>> https://bitbucket.org/milindasf/stepviewer/src/f888657ba24b0a1e7cfe9b6de27b6d356089ab22/images/step2.png?at=default
>> [3].
>> https://bitbucket.org/milindasf/stepviewer/src/f888657ba24b0a1e7cfe9b6de27b6d356089ab22/images/step3.png?at=default
>>
>>
>> On Sunday, June 21, 2015 at 9:33:05 AM UTC+5:30, Milinda Fernando wrote:
>>>
>>> Dear Charlie,
>>>
>>> I am writing this to inform about my progress in the STEPViewer project.
>>> I have created a sample GUI for the STEPViewer and for the display manager
>>> I have tried my best to use BRLCAD libdm. But I could not initialize a
>>> proper libdm window. So I decided to go with OpenGL window embedded in a Qt
>>> main window. I have implemented the rotation and zooming functionality to
>>> the viewer. You can find the latest code for the project from [1]. My
>>> development blogs can be found in [2].
>>>
>>> The most important part of the project is to visualize a STEP file in
>>> the OpenGL view (display manager window). For that I have converted the
>>> .step file to .g file using STEP2G converter. The next task is to display
>>> the .g file in the OpenGL view. For that I need to extract triangle details
>>> from the .g file. I refereed to some librt code. What I found was if you
>>> can read the .g file to rt_brep_internal structure then you can browse the
>>> brep triangles which needs to visualize the model in OpenGL. Am I going in
>>> the right direction? How can I visualize .g file in openGL view. ? Any
>>> example codes that I should look at ? Any help regarding this is really
>>> appreciated.
>>>
>>> The plan (As Sean mentioned) is if this is working we can make the
>>> STEP2G conversion to stop at the serialized binary data so that the
>>> conversion is in the memory and then visualize it.
>>>
>>> [1]. https://bitbucket.org/milindasf/stepviewer/src
>>> [2]. http://brlcad.org/wiki/User:MilindaFernando/gsoc2015_devlog
>>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "STEPcode - Developers Mailing List" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to scl-dev+unsubscr...@googlegroups.com.
>> To post to this group, send email to scl-...@googlegroups.com.
>> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/scl-dev/2bcc0e01-d964-469c-bce8-c668c15d0d4e%40googlegroups.com
>> <https://groups.google.com/d/msgid/scl-dev/2bcc0e01-d964-469c-bce8-c668c15d0d4e%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>>
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
>
--
Milinda Fernando.
Undergraduate Department of Computer Science and Engineering
University of Moratuwa
Sri Lanka.
Blog: http://milindasf.blogspot.com/
------------------------------------------------------------------------------
Monitor 25 network devices or servers for free with OpManager!
OpManager is web-based network management software that monitors
network devices and physical & virtual servers, alerts via email & sms
for fault. Monitor 25 devices for free with no restriction. Download now
http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
_______________________________________________
BRL-CAD Developer mailing list
brlcad-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/brlcad-devel
