Thank you very much Wolfgang. Yes I would like to propose a patch. How is it done? I am not familiar with the process.
On Thursday, May 28, 2020 at 7:31:04 PM UTC+3, Wolfgang Bangerth wrote: > > On 5/28/20 3:08 AM, Andreas Kyritsakis wrote: > > > > I have a problem with using the measure() function for quads in 3D. I am > > currently using version 9.1.1 and the function seems to check whether > the face > > is planar and if not, it returns nan. The problem is that the tolerance > for > > considering it planar is extremely low (1.e-24), which causes problems. > If for > > example the mesh is read in from a standard .msh file, written by the > GridOut > > class, we cannot expect to get such a precision in the vertices. I saw > that in > > the 9.2 version this is partially fixed by handling the non-planar case > by > > numerical intergration, but the tolerance has remained the same > extremely low, > > which might result in unnecessary computational effort. > > > > I wonder whether the tolerance can be increased to something more > reasonable > > (e.g. 1.e-10) or there is something I am missing that suggests such a > low > > tolerance. > > It's a good question. I checked that the expression in question is > dimensionless and scaled correctly so that the mesh size h does not appear > in > the size of the expression. I think it would be quite ok if you changed > the > tolerance to 1e-10. > > Want to propose a patch for this? > > Best > W. > > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: bang...@colostate.edu > <javascript:> > www: http://www.math.colostate.edu/~bangerth/ > > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/231d1ecd-03a2-4cce-9590-ed1470fd5278%40googlegroups.com.
