Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / fpl-1.2.0 / FPL2dxoutputdata.m

diff --git a/octave_packages/fpl-1.2.0/FPL2dxoutputdata.m b/octave_packages/fpl-1.2.0/FPL2dxoutputdata.m
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+++ b/octave_packages/fpl-1.2.0/FPL2dxoutputdata.m
@@ -0,0 +1,126 @@
+## Copyright (C) 2004-2008,2009  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 2 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} {} FPL2dxoutputdata ( @var{filename}, @
+##  @var{p}, @var{t}, @var{u},  @var{attr_name}, @var{attr_rank},  @
+##  @var{attr_shape}, @var{endfile} )
+##
+##   Outputs data in DX form.
+##
+##   Variable must be a scalar, vector or tensor of doubles   
+##
+## @itemize @minus
+##  @item @var{filename}= name of file to save (type string)
+##  @item @var{p}, @var{t} = mesh
+##  @item @var{u} = variable to save
+##  @item @var{attr_name}  = name of the variable (type string)
+##  @item @var{attr_rank}  = rank of variable data (0 for scalar, 1 for vector, etc.)
+##  @item @var{attr_shape} = number of components of variable data  (assumed 1 for scalar)
+##  @item @var{endfile} = 0 if you want to add other variables to the
+##  same file, 1 otherwise
+## @end itemize
+## @end deftypefn
+
+function FPL2dxoutputdata(filename,p,t,u,attr_name,attr_rank,attr_shape,endfile)
+
+  p = p';
+  t = t';
+  t = t(:,1:3);
+
+  fid=fopen (filename,'w');
+  Nnodi = size(p,1);
+  Ntriangoli = size(t,1);
+  Ndati = size(u,1);
+
+  fprintf(fid,"object ""pos""\nclass array type float rank 1 shape 2 items %d data follows",Nnodi);
+
+  for i=1:Nnodi
+    fprintf(fid,"\n");
+    fprintf(fid,"    %1.7e",p(i,:));
+  endfor
+                 
+  if (min(min(t))==1)
+    t=t-1;
+  elseif(min(min(t))~=0)
+    disp('WARNING: check triangle structure')
+  endif                    
+  ## In DX format nodes are 
+  ## numbered starting from zero,
+  ## instead we want to number
+  ## them starting from 1!
+  ## Here we restore the DX
+  ## format
+
+  fprintf(fid,"\n\nobject ""con""\nclass array type int rank 1 shape 3 items %d data follows",Ntriangoli);
+  for i=1:Ntriangoli
+    fprintf(fid,"\n");
+    fprintf(fid,"      %d",t(i,:));
+  endfor
+                                 
+  fprintf(fid,"\nattribute ""element type"" string ""triangles""\nattribute ""ref"" string ""positions""\n\n");
+                                 
+  if ((attr_rank==0) & (min(size(u))==1))
+    fprintf(fid,"object ""%s.data""\nclass array type double rank 0 items %d data follows",attr_name,Ndati);
+    fprintf(fid,"\n %1.7e",u);
+    
+  else
+    fprintf(fid,"object ""%s.data""\nclass array type double rank %d shape %d items %d data follows", ...
+           attr_name,attr_rank,attr_shape,Ndati);
+    for i=1:Ndati
+      fprintf(fid,"\n");
+      fprintf(fid,"    %1.7e",u(i,:));
+    endfor
+    
+  endif
+  
+  if Ndati==Nnodi
+    fprintf(fid,["\nattribute ""dep"" string ""positions""\n\n" ...
+                "object ""%s"" class field\n"...
+                "component ""positions"" value ""pos""\n"...
+                "component ""connections"" value ""con""\n"...
+                "component ""data"" value ""%s.data""\n"],...
+           attr_name,attr_name);
+  elseif Ndati==Ntriangoli
+    fprintf(fid,["\nattribute ""dep"" string ""connections""\n\n" ...
+                "object ""%s"" class field\n"...
+                "component ""positions"" value ""pos""\n"...
+                "component ""connections"" value ""con""\n"...
+                "component ""data"" value ""%s.data""\n"],...
+           attr_name,attr_name);
+  endif
+
+  if(endfile)
+    fprintf(fid,"\nend\n");
+  endif
+                                                         
+  fclose (fid);
+  
+  
+endfunction
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