On Mon, Mar 14, 2016 at 8:05 AM, Amritpal Singh <amrit3...@gmail.com> wrote:
> On Fri, Mar 11, 2016 at 10:32 PM, Charlie Stirk <cwst...@gmail.com> wrote:
> > This thread is probably the best place to continue the discussion for now
> > because the hard part will be figuring out how to do the IFC procedural
> > geometry with BRL-CAD. BRL-CAD already uses STEPcode for their STEP
> > importer. So the explicit geometry from IFC could be handled by
> STEPcode.
> > The implicit IFC geometry (procedural things like extrusions) will have
> to
> > be handled by the BRL-CAD procedural capabilities.
>
> Hello everyone,
>
> According to you, we just make the importer of the ifc file for
> BRL-CAD by using STEPcode because BRL-CAD already uses STEPcode for
> STEP translator and also IFC standards is similar to STEP's part42. We
> just add the ifc prefix to all entity of STEP's part42 because
> geometry representation of STEP's part42 is similar to IFC standards.
>
No, that is backwards. On import you need to remove the IFC prefix before
sending the explicit geometry through BRL-CAD's importer for STEP.
> For the understanding, we just take a look of how OpenCasCade and
> STEP's translator are interlinked because we can do the similar thing
> in our project.
>
No, you need to look at how IfcOpenShell does the IFC implicit geometry
with OpenCasCade.
Now what we can do for starting this project?
>
You need to understand what you need to do before you start doing. Do
more research. Take a look at the similarities and differences of IFC and
STEP files. Take a look at how IfcOpenShell works. See how BRL-CAD
modeling primitives could do the implicit geometry in IFC. Then come back
when you understand this and have questions. Work on a patch for BRL-CAD,
like a simple change to the step-g importer that checks for the .ifc file
extension, and removes the IFC prefix from all the entities.
>
> --
> Amritpal Singh
> Guru Nanak Dev Engineering College, India
> http://www.amritpals.com/
> https://github.com/amrit3701
>
>
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--
Charlie Stirk
1472 North St.
Boulder, CO 80304
303-517-9092
cwst...@gmail.com
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