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Commit ceee13b1 authored by Christophe Geuzaine's avatar Christophe Geuzaine
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quick generalization of Plugin(Extract): we can now extract arbitrary
combinations of the field's components
parent 8f6b0b90
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Plugin/Extract.cpp
+ 98
− 48
View file @ ceee13b1
// $Id: Extract.cpp,v 1.7 2004-05-12 06:03:12 geuzaine Exp $
// $Id: Extract.cpp,v 1.8 2004-05-13 06:16:28 geuzaine Exp $
//
// Copyright (C) 1997-2004 C. Geuzaine, J.-F. Remacle
//
......@@ -26,11 +26,18 @@
#include "Context.h"
#include "Malloc.h"
#if defined(HAVE_MATH_EVAL)
#include "matheval.h"
#endif
extern Context_T CTX;
StringXNumber ExtractOptions_Number[] = {
{GMSH_FULLRC, "iView", NULL, -1.},
{GMSH_FULLRC, "iComponent", NULL, 0.}
{GMSH_FULLRC, "iView", NULL, -1.}
};
StringXString ExtractOptions_String[] = {
{GMSH_FULLRC, "Expression", NULL, "v0"}
};
extern "C"
......@@ -56,8 +63,12 @@ void GMSH_ExtractPlugin::getInfos(char *author, char *copyright, char *help_text
strcpy(author, "C. Geuzaine (geuz@geuz.org)");
strcpy(copyright, "DGR (www.multiphysics.com)");
strcpy(help_text,
"Plugin(Extract) extracts the `iComponent'-th\n"
"component of the view `iView'. If `iView' < 0, the\n"
"Plugin(Extract) extracts a combination of\n"
"components from the view `iView', as specified\n"
"by `Expression'. In addition to the usual\n"
"mathematical functions, `Expression' can contain\n"
"the symbols v0, v1, v2, ..., vn, which represent\n"
"the n components of the field. If `iView' < 0, the\n"
"plugin is run on the current view.\n"
"\n"
"Plugin(Extract) creates one new view.\n");
......@@ -73,42 +84,87 @@ StringXNumber *GMSH_ExtractPlugin::getOption(int iopt)
return &ExtractOptions_Number[iopt];
}
int GMSH_ExtractPlugin::getNbOptionsStr() const
{
return sizeof(ExtractOptions_String) / sizeof(StringXString);
}
StringXString *GMSH_ExtractPlugin::getOptionStr(int iopt)
{
return &ExtractOptions_String[iopt];
}
void GMSH_ExtractPlugin::catchErrorMessage(char *errorMessage) const
{
strcpy(errorMessage, "Extract failed...");
}
static void extract(int comp, List_T *inList, int inNb,
static void extract(char *expr, List_T *inList, int inNb,
List_T *outList, int *outNb,
int nbTime, int nbNod, int nbComp)
{
if(!inNb)
return;
if(comp < 0 || comp > nbComp-1){
Msg(GERROR, "Cannot extract component #(%d+1)=%d from a %d-component field",
comp, comp+1, nbComp);
// if we have MathEval, we can evaluate arbitrary expressions;
// otherwise, we only allow to extract single components
#if defined(HAVE_MATH_EVAL)
void *f = evaluator_create(expr);
if(!f){
Msg(GERROR, "Invalid expression '%s'", expr);
return;
}
#else
int comp;
if (!strcmp(expr, "v0")) comp = 0;
else if(!strcmp(expr, "v1")) comp = 1;
else if(!strcmp(expr, "v2")) comp = 2;
else if(!strcmp(expr, "v3")) comp = 3;
else if(!strcmp(expr, "v4")) comp = 4;
else if(!strcmp(expr, "v5")) comp = 5;
else if(!strcmp(expr, "v6")) comp = 6;
else if(!strcmp(expr, "v7")) comp = 7;
else if(!strcmp(expr, "v8")) comp = 8;
else{
Msg(GERROR, "Invalid expression '%s'", expr);
return;
}
#endif
int nb = List_Nbr(inList) / inNb;
for(int i = 0; i < List_Nbr(inList); i += nb) {
for(int j = 0; j < 3 * nbNod; j++)
List_Add(outList, List_Pointer_Fast(inList, i + j));
for(int j = 0; j < nbTime; j++)
for(int k = 0; k < nbNod; k++)
List_Add(outList, List_Pointer_Fast(inList, i + 3 * nbNod +
nbNod * nbComp * j +
nbComp * k +
comp));
for(int j = 0; j < nbTime; j++){
for(int k = 0; k < nbNod; k++){
double res, d[9];
for(int l = 0; l < nbComp; l++)
List_Read(inList, i + 3 * nbNod + nbNod * nbComp * j + nbComp * k + l, &d[l]);
for(int l = nbComp; l < 9; l++)
d[l] = 0.;
#if defined(HAVE_MATH_EVAL)
char *names[] = { "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8" };
double values[] = { d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], d[8] };
res = evaluator_evaluate(f, sizeof(names)/sizeof(names[0]), names, values);
#else
res = d[comp];
#endif
List_Add(outList, &res);
}
}
(*outNb)++;
}
#if defined(HAVE_MATH_EVAL)
evaluator_destroy(f);
#endif
}
Post_View *GMSH_ExtractPlugin::execute(Post_View * v)
{
int iView = (int)ExtractOptions_Number[0].def;
int iComp = (int)ExtractOptions_Number[1].def;
char *expr = ExtractOptions_String[0].def;
Post_View *vv;
if(v && iView < 0)
......@@ -126,44 +182,38 @@ Post_View *GMSH_ExtractPlugin::execute(Post_View * v)
// reallocation, vv is wrong
Post_View *view = BeginView(1);
// FIXME: this is a very quick implementation of the Extract
// plugin. An interesting generalization would be to allow arbitrary
// manipulations of the components: we could do that by merging the
// stack-based expression evaluator from getdp and then allow things
// like "$1 + $2", or "Sqrt[$1^2+$5^2]"...
// points
extract(iComp, vv->SP, vv->NbSP, view->SP, &view->NbSP, vv->NbTimeStep, 1, 1);
extract(iComp, vv->VP, vv->NbVP, view->SP, &view->NbSP, vv->NbTimeStep, 1, 3);
extract(iComp, vv->TP, vv->NbTP, view->SP, &view->NbSP, vv->NbTimeStep, 1, 9);
extract(expr, vv->SP, vv->NbSP, view->SP, &view->NbSP, vv->NbTimeStep, 1, 1);
extract(expr, vv->VP, vv->NbVP, view->SP, &view->NbSP, vv->NbTimeStep, 1, 3);
extract(expr, vv->TP, vv->NbTP, view->SP, &view->NbSP, vv->NbTimeStep, 1, 9);
// lines
extract(iComp, vv->SL, vv->NbSL, view->SL, &view->NbSL, vv->NbTimeStep, 2, 1);
extract(iComp, vv->VL, vv->NbVL, view->SL, &view->NbSL, vv->NbTimeStep, 2, 3);
extract(iComp, vv->TL, vv->NbTL, view->SL, &view->NbSL, vv->NbTimeStep, 2, 9);
extract(expr, vv->SL, vv->NbSL, view->SL, &view->NbSL, vv->NbTimeStep, 2, 1);
extract(expr, vv->VL, vv->NbVL, view->SL, &view->NbSL, vv->NbTimeStep, 2, 3);
extract(expr, vv->TL, vv->NbTL, view->SL, &view->NbSL, vv->NbTimeStep, 2, 9);
// triangles
extract(iComp, vv->ST, vv->NbST, view->ST, &view->NbST, vv->NbTimeStep, 3, 1);
extract(iComp, vv->VT, vv->NbVT, view->ST, &view->NbST, vv->NbTimeStep, 3, 3);
extract(iComp, vv->TT, vv->NbTT, view->ST, &view->NbST, vv->NbTimeStep, 3, 9);
extract(expr, vv->ST, vv->NbST, view->ST, &view->NbST, vv->NbTimeStep, 3, 1);
extract(expr, vv->VT, vv->NbVT, view->ST, &view->NbST, vv->NbTimeStep, 3, 3);
extract(expr, vv->TT, vv->NbTT, view->ST, &view->NbST, vv->NbTimeStep, 3, 9);
// quadrangles
extract(iComp, vv->SQ, vv->NbSQ, view->SQ, &view->NbSQ, vv->NbTimeStep, 4, 1);
extract(iComp, vv->VQ, vv->NbVQ, view->SQ, &view->NbSQ, vv->NbTimeStep, 4, 3);
extract(iComp, vv->TQ, vv->NbTQ, view->SQ, &view->NbSQ, vv->NbTimeStep, 4, 9);
extract(expr, vv->SQ, vv->NbSQ, view->SQ, &view->NbSQ, vv->NbTimeStep, 4, 1);
extract(expr, vv->VQ, vv->NbVQ, view->SQ, &view->NbSQ, vv->NbTimeStep, 4, 3);
extract(expr, vv->TQ, vv->NbTQ, view->SQ, &view->NbSQ, vv->NbTimeStep, 4, 9);
// tets
extract(iComp, vv->SS, vv->NbSS, view->SS, &view->NbSS, vv->NbTimeStep, 4, 1);
extract(iComp, vv->VS, vv->NbVS, view->SS, &view->NbSS, vv->NbTimeStep, 4, 3);
extract(iComp, vv->TS, vv->NbTS, view->SS, &view->NbSS, vv->NbTimeStep, 4, 9);
extract(expr, vv->SS, vv->NbSS, view->SS, &view->NbSS, vv->NbTimeStep, 4, 1);
extract(expr, vv->VS, vv->NbVS, view->SS, &view->NbSS, vv->NbTimeStep, 4, 3);
extract(expr, vv->TS, vv->NbTS, view->SS, &view->NbSS, vv->NbTimeStep, 4, 9);
// hexas
extract(iComp, vv->SH, vv->NbSH, view->SH, &view->NbSH, vv->NbTimeStep, 8, 1);
extract(iComp, vv->VH, vv->NbVH, view->SH, &view->NbSH, vv->NbTimeStep, 8, 3);
extract(iComp, vv->TH, vv->NbTH, view->SH, &view->NbSH, vv->NbTimeStep, 8, 9);
extract(expr, vv->SH, vv->NbSH, view->SH, &view->NbSH, vv->NbTimeStep, 8, 1);
extract(expr, vv->VH, vv->NbVH, view->SH, &view->NbSH, vv->NbTimeStep, 8, 3);
extract(expr, vv->TH, vv->NbTH, view->SH, &view->NbSH, vv->NbTimeStep, 8, 9);
// prisms
extract(iComp, vv->SI, vv->NbSI, view->SI, &view->NbSI, vv->NbTimeStep, 6, 1);
extract(iComp, vv->VI, vv->NbVI, view->SI, &view->NbSI, vv->NbTimeStep, 6, 3);
extract(iComp, vv->TI, vv->NbTI, view->SI, &view->NbSI, vv->NbTimeStep, 6, 9);
extract(expr, vv->SI, vv->NbSI, view->SI, &view->NbSI, vv->NbTimeStep, 6, 1);
extract(expr, vv->VI, vv->NbVI, view->SI, &view->NbSI, vv->NbTimeStep, 6, 3);
extract(expr, vv->TI, vv->NbTI, view->SI, &view->NbSI, vv->NbTimeStep, 6, 9);
// pyramids
extract(iComp, vv->SY, vv->NbSY, view->SY, &view->NbSY, vv->NbTimeStep, 5, 1);
extract(iComp, vv->VY, vv->NbVY, view->SY, &view->NbSY, vv->NbTimeStep, 5, 3);
extract(iComp, vv->TY, vv->NbTY, view->SY, &view->NbSY, vv->NbTimeStep, 5, 9);
extract(expr, vv->SY, vv->NbSY, view->SY, &view->NbSY, vv->NbTimeStep, 5, 1);
extract(expr, vv->VY, vv->NbVY, view->SY, &view->NbSY, vv->NbTimeStep, 5, 3);
extract(expr, vv->TY, vv->NbTY, view->SY, &view->NbSY, vv->NbTimeStep, 5, 9);
if(view->empty()) {
RemoveViewByNumber(view->Num);
......@@ -174,8 +224,8 @@ Post_View *GMSH_ExtractPlugin::execute(Post_View * v)
List_Add(view->Time, List_Pointer(vv->Time, i));
// finalize
char name[1024], filename[1024];
sprintf(name, "%s_Extract_%d", vv->Name, iComp);
sprintf(filename, "%s_Extract_%d.pos", vv->Name, iComp);
sprintf(name, "%s_Extract", vv->Name);
sprintf(filename, "%s_Extract.pos", vv->Name);
EndView(view, 1, filename, name);
}
......
Plugin/Extract.h
+ 2
− 0
View file @ ceee13b1
......@@ -37,6 +37,8 @@ class GMSH_ExtractPlugin : public GMSH_Post_Plugin
void catchErrorMessage(char *errorMessage) const;
int getNbOptions() const;
StringXNumber* getOption(int iopt);
int getNbOptionsStr() const;
StringXString* getOptionStr(int iopt);
Post_View *execute(Post_View *);
};
......
doc/VERSIONS
+ 4
− 3
View file @ ceee13b1
$Id: VERSIONS,v 1.202 2004-05-12 23:20:47 geuzaine Exp $
$Id: VERSIONS,v 1.203 2004-05-13 06:16:28 geuzaine Exp $
New since 1.52: various background mesh fixes and enhancements; new
Plugin(Evaluate) to evaluate arbitrary expressions on scalar
post-processing views; generalized "Coherence" to handle transfinite
surface/volume attributes;
post-processing views; generalized Plugin(Extract) to handle any
combination of components; generalized "Coherence" to handle
transfinite surface/volume attributes;
New in 1.52: new raster ("bitmap") PostScript/EPS/PDF output formats;
new Plugin(Extract) to extract a given component from a
......
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