From: bangerth Date: Fri, 18 Jan 2013 23:47:53 +0000 (+0000) Subject: Clarify documentation. X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=133b1b1e45528aae150a2504d559f6186cc8fdfe;p=dealii-svn.git Clarify documentation. git-svn-id: https://svn.dealii.org/trunk@28141 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/include/deal.II/numerics/data_out.h b/deal.II/include/deal.II/numerics/data_out.h index 6d126e517e..0acdca6641 100644 --- a/deal.II/include/deal.II/numerics/data_out.h +++ b/deal.II/include/deal.II/numerics/data_out.h @@ -1,7 +1,7 @@ //--------------------------------------------------------------------------- // $Id$ // -// Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 by the deal.II authors +// Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 by the deal.II authors // // This file is subject to QPL and may not be distributed // without copyright and license information. Please refer @@ -998,14 +998,19 @@ protected: * classes. You can give a parameter to the function which determines how many * subdivisions in each coordinate direction are to be performed, i.e. of how * many subcells each patch shall consist. Default is one, but you may want to - * choose a higher number for higher order elements, so as two for quadratic - * elements, three for cubic elements three, and so on. The purpose of this - * parameter is because most graphics programs do not allow to specify higher - * order shape functions in the file formats: only data at vertices can be - * plotted and is then shown as a bilinear interpolation within the interior - * of cells. This may be insufficient if you have higher order finite - * elements, and the only way to achieve better output is to subdivide each - * cell of the mesh into several cells for graphical output. + * choose a higher number for higher order elements, for example two for + * quadratic elements, three for cubic elements three, and so on. The purpose + * of this parameter is because most graphics programs do not allow to specify + * higher order polynomial functions in the file formats: only data at + * vertices can be plotted and is then shown as a bilinear interpolation + * within the interior of cells. This may be insufficient if you have higher + * order finite elements, and the only way to achieve better output is to + * subdivide each cell of the mesh into several cells for graphical output. Of + * course, what you get to see is still a bilinear interpolation on each cell + * of the output (where these cells are not subdivisions of the cells of the + * triangulation in use) due to the same limitations in output formats, but at + * least a bilinear interpolation of a higher order polynomial on a finer + * mesh. * * Note that after having called build_patches() once, you can call one or * more of the write() functions of DataOutInterface. You can therefore