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// Gmsh - Copyright (C) 1997-2021 C. Geuzaine, J.-F. Remacle
//
// See the LICENSE.txt file for license information. Please report all
// issues on https://gitlab.onelab.info/gmsh/gmsh/issues.
#include "ExtractElements.h"
#include "Numeric.h"
StringXNumber ExtractElementsOptions_Number[] = {
{GMSH_FULLRC, "MinVal", nullptr, 0.},
{GMSH_FULLRC, "MaxVal", nullptr, 0.},
{GMSH_FULLRC, "TimeStep", nullptr, 0.},
{GMSH_FULLRC, "Visible", nullptr, 1.},
{GMSH_FULLRC, "Dimension", nullptr, -1.},
{GMSH_FULLRC, "View", nullptr, -1.}};
extern "C" {
GMSH_Plugin *GMSH_RegisterExtractElementsPlugin()
{
return new GMSH_ExtractElementsPlugin();
}
}
std::string GMSH_ExtractElementsPlugin::getHelp() const
{
return "Plugin(ExtractElements) extracts some elements "
"from the view `View'. If `MinVal' != `MaxVal', it extracts "
"the elements whose `TimeStep'-th values (averaged by element) "
"are comprised between `MinVal' and `MaxVal'. If `Visible' != 0, "
"it extracts visible elements. "
"\n\n"
"If `View' < 0, the plugin is run on the current view.\n\n"
"Plugin(ExtractElements) creates one new list-based view.";
}
int GMSH_ExtractElementsPlugin::getNbOptions() const
{
return sizeof(ExtractElementsOptions_Number) / sizeof(StringXNumber);
}
StringXNumber *GMSH_ExtractElementsPlugin::getOption(int iopt)
{
return &ExtractElementsOptions_Number[iopt];
}
PView *GMSH_ExtractElementsPlugin::execute(PView *v)
{
double MinVal = ExtractElementsOptions_Number[0].def;
double MaxVal = ExtractElementsOptions_Number[1].def;
int thisStep = (int)ExtractElementsOptions_Number[2].def;
int visible = (int)ExtractElementsOptions_Number[3].def;
int dimension = (int)ExtractElementsOptions_Number[4].def;
int iView = (int)ExtractElementsOptions_Number[5].def;
PView *v1 = getView(iView, v);
if(!v1) return v;
PViewData *data1 = getPossiblyAdaptiveData(v1);
bool checkMinMax = MinVal != MaxVal;
int step = (thisStep < 0) ? 0 : thisStep;
if(thisStep > data1->getNumTimeSteps() - 1) {
Msg::Error("Invalid time step (%d) in View[%d]: using first step instead",
thisStep, v1->getIndex());
step = 0;
}
PView *v2 = new PView();
PViewDataList *data2 = getDataList(v2);
for(int ent = 0; ent < data1->getNumEntities(step); ent++) {
if(visible && data1->skipEntity(step, ent)) continue;
for(int ele = 0; ele < data1->getNumElements(step, ent); ele++) {
if(data1->skipElement(step, ent, ele, visible)) continue;
int dim = data1->getDimension(step, ent, ele);
if((dimension > 0) && (dim != dimension)) continue;
int numNodes = data1->getNumNodes(step, ent, ele);
if(checkMinMax) {
double d = 0.;
for(int nod = 0; nod < numNodes; nod++) {
double val;
data1->getScalarValue(step, ent, ele, nod, val);
d += val;
}
d /= (double)numNodes;
// use '>=' and '<' so that we can do segmentation without
// worrying about roundoff errors
if(d < MinVal || d >= MaxVal) continue;
}
int type = data1->getType(step, ent, ele);
int numComp = data1->getNumComponents(step, ent, ele);
std::vector<double> *out = data2->incrementList(numComp, type, numNodes);
std::vector<double> x(numNodes), y(numNodes), z(numNodes);
std::vector<double> v(numNodes * numComp);
for(int nod = 0; nod < numNodes; nod++)
data1->getNode(step, ent, ele, nod, x[nod], y[nod], z[nod]);
for(int nod = 0; nod < numNodes; nod++) out->push_back(x[nod]);
for(int nod = 0; nod < numNodes; nod++) out->push_back(y[nod]);
for(int nod = 0; nod < numNodes; nod++) out->push_back(z[nod]);
for(int step = 0; step < data1->getNumTimeSteps(); step++) {
if(!data1->hasTimeStep(step)) continue;
if((thisStep >= 0) && (thisStep != step)) continue;
for(int nod = 0; nod < numNodes; nod++) {
for(int comp = 0; comp < numComp; comp++) {
double temp;
data1->getValue(step, ent, ele, nod, comp, temp);
out->push_back(temp);
}
}
}
}
}
if(thisStep >= 0)
data2->Time.push_back(data1->getTime(thisStep));
else {
for(int step = 0; step < data1->getNumTimeSteps(); step++) {
data2->Time.push_back(data1->getTime(step));
}
}
data2->setName(data1->getName() + "_ExtractElements");
data2->setFileName(data1->getName() + "_ExtractElements.pos");
data2->finalize();
return v2;
}
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