On Wed, Mar 19, 2014 at 9:11 PM, Christopher Sean Morrison
<brl...@mac.com>wrote:
>
> On Mar 19, 2014, at 4:55 PM, Charlie Stirk wrote:
>
> STEPcode can parse the schema and generate class libraries, an API, and
> file read/write executable. STEPcode provides a partial implementation of
> 10303-22, the Standard Data Access Interface, and does not yet include the
> database aspects of 10303-22.
>
>
> That would have made for a good GSoC project idea. Hook up STEPcode's
> SDAI generator to SQLite for the missing session/repository components...
>
Agreed, and we had it as a GSoC project idea two years ago, but took it out
last year because it would not directly help BRL-CAD's implementation.
Now with the material database project for BRL-CAD, it is relevant again.
>
> The BRL-CAD translator for STEP, based on STEPcode, could be expanded to
> support the CAX-IF material identification capability, which can be a key
> to material properties. Or one can use the generic STEP User Defined
> Attribute functionality. Recommended practices and sample files can be
> found at www.cax-if.org.
>
>
> Albert, this is definitely something worth looking into if only so the web
> interface you're proposing is flexible enough to accommodate STEP
> import/export later on. My gut says the emphasis should remain on the web
> interface usability, so it'll be important to make sure you capture common
> data needs.
>
> Here is the link to the recommended practice.
http://www.cax-if.org/documents/RecPrac_MaterialDensity_v21.pdf
It should not be too hard to add this capability to BRL-CAD's importer for
STEP CAD files. There are some sample files here that are exports from
some CAD tools.
http://www.cax-if.org/library/index.html
Here are the recommended practices for User Defined Attributes, which can
be used to carry material properties.
http://www.cax-if.org/documents/rec_prac_user_def_attributes_v1.pdf
However, for UDA both the sender and receiver have to agree on how material
properties would be encoded.
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