On Mon, Oct 19, 2009 at 11:27:53AM +0100, Garth N. Wells wrote: > > > Andre Massing wrote: > > Hi, > > > > I am just wondering why GTS has been only optional in the past, although > > the eval function > > > > void Function::eval(double* values, const double* x) const > > http://www.fenics.org/hg/dolfin/file/32bcc3b91dd7/dolfin/function/Function.cpp#l243 > > > > in the Function class depends on the IntersectionDetector, which in turn > > depends on GTS. > > > > GTS was added before eval(double* values, const double* x) for finite > element functions was added and we haven't bothered reconsidering > whether or not GTS should be an optional dependency sicne. Most demos > should run without GTS. > > > Furthermore a 1D function can not evaluated at arbitrary points for > > functions on 1D grids since the the IntervalCell class > > > > http://www.fenics.org/hg/dolfin/file/32bcc3b91dd7/dolfin/mesh/IntervalCell.cpp#l183 > > > > does not provide a implementation. > > > > So I wondering how these things work instead? At least I could not find > > it in the docs and my benchmarks throw an exception when I tried to run > > the old IntersectionDetector for 1D meshes and points intersection. > > > > Probably never been tested before. > > Garth > > > (Of course the forthcoming CGAL interface will remedy these issues > ;))
Even so, it would probably be best to make CGAL optional since it may be a heavy dependency. We can throw a sensible error message when CGAL is not installed. It would be good to make it possible to install DOLFIN on a Debian-based system with the only extra dependencies being other FEniCS packages. When CGAL 3.5 is in Debian, we can make it a dependency. -- Anders > > Greetings, > > Andre > > _______________________________________________ > > DOLFIN-dev mailing list > > DOLFIN-dev@fenics.org > > http://www.fenics.org/mailman/listinfo/dolfin-dev > > > _______________________________________________ > DOLFIN-dev mailing list > DOLFIN-dev@fenics.org > http://www.fenics.org/mailman/listinfo/dolfin-dev
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