Re: Solid modeling in Guile

[Ralf Mattes]

On Sat, Aug 20, 2016 at 10:26:53AM -0400, Matthew Keeter wrote:
> I added a cmath include and qualified isnan with std::,
> try it out now and see if that fixes it (commit 61ce8e1).

Yes, it does fix the compilation problem.
There seems to be a problem with out-of-tree building (or isn't that
supported by ninja?).
When I start the build from <toplevel source>/build64/ everything compiles
fine but the ao-guile script ends up in <toplevel source>/bin and _not_ in
<toplevel source>/build64/bin where it should be ...
Strangely, libao.so ends up in the right place.

When I run the program I the program finishes with the following line:

 $ GUILE_AUTO_COMPILE=0 bin/ao-guile
 ....
 under certain conditions; type `,show c' for details.

 Enter `,help' for help.
 Ao> guile-2.0: Couldn't find current GLX or EGL context.

When I set  GUILE_AUTO_COMPILE=1 that same error shows up, but 
already during compilation (?!).
 
 $ GUILE_AUTO_COMPILE=1 bin/ao-guile
 ...
 ;;; compiling /usr/local/src/LISP/ao/bin/../bind/guile/ao/shapes.scm
 guile-2.0: Couldn't find current GLX or EGL context.

HTH RalfD


> -Matt
> 
> On Aug 20, 2016, at 9:23 AM, Ralf Mattes <address@hidden> wrote:
> 
> > On Thu, Aug 18, 2016 at 05:44:46PM -0400, Matthew Keeter wrote:
> >> Hi Guile-folks,
> >> 
> >> I wrote a computer-aided design (CAD) tool that you may find interesting.
> >> 
> >> It’s a solid modeling tool that uses Guile scripts to define objects (and
> >> constructive solid geometry + functional representations under the hood).
> >> 
> >> Project page:  http://www.mattkeeter.com/projects/ao/
> >> Source:  https://github.com/mkeeter/ao
> >> 
> >> I’d love feedback – Scheme is relatively new to me, so I’m sure there are
> >> more elegant ways to accomplish a lot of what the code implements.
> > 
> > 
> > Build fails over here: 
> > 
> > ../kernel/src/eval/evaluator.cpp: In function ‘Interval clause(Opcode, 
> > const Interval&, const Interval&)’:
> > ../kernel/src/eval/evaluator.cpp:805:36: error: ‘isnan’ was not declared in 
> > this scope
> >             return (isnan(a.lower()) || isnan(a.upper())) ? b : a;
> >                                    ^
> > 
> > This is with:
> > 
> > /usr/bin/c++ --version
> > g++-5.real (Debian 5.4.0-6) 5.4.0 20160609
> > 
> > and /usr/include/c++/5/cmath from the package libstdc++-5-dev:amd64
> > on a Debian Testing system.
> > 
> > But it looks very nice 
> > 
> > 
> > Cheers, Ralf Mattes
> > 
> >> -Matt
> 
>