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date | Sat, 27 Feb 2016 11:21:29 +0000 |
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## Copyright (C) 2004-2008 Carlo de Falco, Massimiliano Culpo ## ## This file is part of ## ## FPL - Fem PLotting package for octave ## ## FPL is free software; you can redistribute it and/or modify ## it under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or ## (at your option) any later version. ## ## FPL is distributed in the hope that it will be useful, ## but WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with FPL; If not, see <http://www.gnu.org/licenses/>. ## ## ## AUTHORS: ## Carlo de Falco <cdf _AT_ users.sourceforge.net> ## ## Culpo Massimiliano ## Bergische Universitaet Wuppertal ## Fachbereich C - Mathematik und Naturwissenschaften ## Arbeitsgruppe fuer Angewandte MathematD-42119 Wuppertal Gaussstr. 20 ## D-42119 Wuppertal, Germany ## -*- texinfo -*- ## @deftypefn {Function File} {} FPL2pdequiver (@var{mesh}, @ ## @var{vx}, @var{vy}, [ @var{property}, @var{value} ...]) ## ## Plots the 2D vector field @var{vx}, @var{vy} ## defined on the triangulation @var{mesh} using opendx. ## ## Options (default values): ## @var{sample_density} (100) ## ## @seealso{FPL2pdesurf, FPL2ptcsurf, FPL2ptcquiver} ## @end deftypefn function FPL2pdequiver(mesh,vecfieldx,vecfieldy,varargin); sample_density = "100"; if( (nargin >= 3) && (rem(nargin,2)==1) ) for ii=1:2:length(varargin) [ varargin{ii} " = " varargin{ii+1} ";" ] eval([ varargin{ii} " = """ varargin{ii+1} """;" ]); endfor else error(["wrong number of parameters " num2str (nargin)]) endif JX = sum(vecfieldx,1)'/3; JY = sum(vecfieldy,1)'/3; dataname = mktemp("/tmp",".dx"); scriptname = mktemp("/tmp",".net"); FPL2dxoutputdata(dataname,mesh.p,mesh.t,[ JX JY],'J',1,2,1); showmesh = file_in_path(path,"FPL2pdequiver.net"); system (["cp " showmesh " " scriptname]); system (["sed -i \'s|__FILE__DX__|" dataname "|g\' " scriptname]); system (["sed -i \'s|__SAMPLE__DENSITY__|" sample_density "|g\' " scriptname]); command = ["dx -noConfirmedQuit -program " scriptname " -execute -image >& /dev/null & "]; system(command); endfunction function filename = mktemp (direct,ext); if (~exist(direct,"dir")) error("trying to save temporary file to non existing directory") endif done=false; while ~done filename = [direct,"/FPL.",num2str(floor(rand*1e7)),ext]; if ~exist(filename,"file") done =true; endif endwhile endfunction