Hello!
As we discussed, I have submitted a patch
<https://sourceforge.net/p/brlcad/patches/329/> adding a very simple
OpenSCAD importer, any feedback is appreciated!
After looking at the
https://github.com/TomHodson/Raspberry-Pi-OpenSCAD-Model I believe a
confusion I had cleared. I initially believed OpenSCAD would have a binary
format(similar to .g) and I couldn't figure what would I need a parser for?
At this moment, my understanding is that OpenSCAD uses text format, which I
have to parse, build logic from, then save the logic in a .g geometry
database. My priority is to fix any issues at that initial, very simple
patch, so if you have any suggestions, please let me know.
After that, I will start working on my proposal the same time as I further
extend the OpenSCAD logic/parser. I was thinking that the next step would
be to correctly identify the modules in OpenSCAD structure and store them
in a data structure(possibly a vector, initially?).
How does that sound?
Thank you! Your support/replies helped me get a much clearer scope and
understanding of this project than I initially had!
Andrei Ilinca
On Mon, Mar 16, 2015 at 12:24 AM, Clifford Yapp <cliffy...@gmail.com> wrote:
> On Sun, Mar 15, 2015 at 5:59 PM, Ilinca Andrei
> <andrei.ilinc...@gmail.com> wrote:
> > Hi,
> >
> > Based on your reply, I decided to focus on the OpenSCAD Importer
> project. I
> > have been looking over the 3dm-g and g-3dm files and my understanding is
> > that they convert the geometry from 3dm model ( Rhino Modeling ) to
> BRL-CAD
> > .g format, namely BRL-CAD database.
>
> Yes.
>
> > I have also found the BRL-CAD Database Format but I didn't quite find
> > something similar regarding the OpenSCAD , except for this file . I'm
> not
> > sure if it's the right format documentation. Could you please point me
> into
> > the right direction to where a OpenSCAD format description exists or
> > confirm?
>
> I would suggest starting here:
> http://en.wikibooks.org/wiki/OpenSCAD_User_Manual/General
> http://en.wikibooks.org/wiki/OpenSCAD_User_Manual/The_OpenSCAD_Language
>
> You'll need to first create a lexer/parser for the high level OpenSCAD
> language (first link). Once you've got that, you will move on to the
> more specific geometric concepts. Remember OpenSCAD is GPL and
> BRL-CAD is LGPL, so we can't just grab OpenSCAD's own implementation
> of the language from their code.
>
> > Please correct me if I'm wrong, to sum up, my understanding is that I
> have
> > to implement a file similar to 3dm-g, but for the OpenSCAD format. Once I
> > figure out what format OpenSCAD uses, the first step I would take is to
> > implement a dummy stub(a new OpenSCADformat-g.cpp and .h) that reads an
> > OpenSCAD file as-is, connected to CMAKE logic. Does this make sense? If
> not,
> > how should I proceed?
>
> That sounds like an excellent start - I'd probably call it scad-g
> based on their file extension. Indeed, an initial patch might be to
> create an scad-g file hooked in in src/conv that reads an OpenSCAD
> file and prints back its contents. (More interesting would be to
> begin to identify structure in the file, but aim for a clean patch
> that is more basic rather than something with more features that's not
> up to the HACKING file's standards.) Here's a simple example scad
> file you can test with:
>
> https://github.com/TomHodson/Raspberry-Pi-OpenSCAD-Model
>
> Cheers,
> CY
>
>
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