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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 "Integrate.h"
#include "shapeFunctions.h"
#include "PViewOptions.h"
StringXNumber IntegrateOptions_Number[] = {
{GMSH_FULLRC, "View", nullptr, -1.},
{GMSH_FULLRC, "OverTime", nullptr, -1.},
{GMSH_FULLRC, "Dimension", nullptr, -1.},
{GMSH_FULLRC, "Visible", nullptr, 1.}};
extern "C" {
GMSH_Plugin *GMSH_RegisterIntegratePlugin()
{
return new GMSH_IntegratePlugin();
}
}
std::string GMSH_IntegratePlugin::getHelp() const
{
return "Plugin(Integrate) integrates a scalar field over all the elements "
"of the view `View' (if `Dimension' < 0), or over all elements of "
"the prescribed dimension (if `Dimension' > 0). If the field is a "
"vector field, the circulation/flux of the field over line/surface "
"elements is calculated.\n\n"
"If `View' < 0, the plugin is run on the current view.\n\n"
"If `OverTime' = i > -1 , the plugin integrates the scalar view "
"over time (using the trapezoidal rule) instead of over space, "
"starting at step i. If `Visible' = 1, the plugin only integrates "
"over visible entities.\n\n"
"Plugin(Integrate) creates one new list-based view.";
}
int GMSH_IntegratePlugin::getNbOptions() const
{
return sizeof(IntegrateOptions_Number) / sizeof(StringXNumber);
}
StringXNumber *GMSH_IntegratePlugin::getOption(int iopt)
{
return &IntegrateOptions_Number[iopt];
}
PView *GMSH_IntegratePlugin::execute(PView *v)
{
int iView = (int)IntegrateOptions_Number[0].def;
int overTime = (int)IntegrateOptions_Number[1].def;
int dimension = (int)IntegrateOptions_Number[2].def;
bool visible = (bool)IntegrateOptions_Number[3].def;
PView *v1 = getView(iView, v);
if(!v1) return v;
PViewData *data1 = getPossiblyAdaptiveData(v1);
PView *v2 = new PView();
PViewDataList *data2 = getDataList(v2);
if(overTime == -1) {
double x = data1->getBoundingBox().center().x();
double y = data1->getBoundingBox().center().y();
double z = data1->getBoundingBox().center().z();
data2->SP.push_back(x);
data2->SP.push_back(y);
data2->SP.push_back(z);
for(int step = 0; step < data1->getNumTimeSteps(); step++) {
double res = 0, resv[9] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
bool simpleSum = false;
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 numComp = data1->getNumComponents(step, ent, ele);
int numEdges = data1->getNumEdges(step, ent, ele);
bool scalar = (numComp == 1);
bool circulation = (numComp == 3 && numEdges == 1);
bool flux = (numComp == 3 && (numEdges == 3 || numEdges == 4));
int numNodes = data1->getNumNodes(step, ent, ele);
int dim = data1->getDimension(step, ent, ele);
if((dimension > 0) && (dim != dimension)) continue;
double x[8], y[8], z[8], val[8 * 3] = {0.};
for(int nod = 0; nod < numNodes; nod++) {
data1->getNode(step, ent, ele, nod, x[nod], y[nod], z[nod]);
for(int comp = 0; comp < numComp; comp++)
data1->getValue(step, ent, ele, nod, comp,
val[numComp * nod + comp]);
}
if(numNodes == 1) {
simpleSum = true;
res += val[0];
for(int comp = 0; comp < numComp; comp++) resv[comp] += val[comp];
}
else {
elementFactory factory;
element *element = factory.create(numNodes, dim, x, y, z);
if(!element) continue;
if(scalar)
res += element->integrate(val);
else if(circulation)
res += element->integrateCirculation(val);
else if(flux)
res += element->integrateFlux(val);
delete element;
}
}
}
if(simpleSum)
Msg::Info("Step %d: sum = %g %g %g %g %g %g %g %g %g", step, resv[0],
resv[1], resv[2], resv[3], resv[4], resv[5], resv[6], resv[7],
resv[8]);
else
Msg::Info("Step %d: integral = %.16g", step, res);
data2->SP.push_back(res);
}
data2->NbSP = 1;
v2->getOptions()->intervalsType = PViewOptions::Numeric;
for(int i = 0; i < data1->getNumTimeSteps(); i++) {
double time = data1->getTime(i);
data2->Time.push_back(time);
}
}
else {
int firstStep = data1->getFirstNonEmptyTimeStep();
int numSteps = data1->getNumTimeSteps();
for(int ent = 0; ent < data1->getNumEntities(firstStep); ent++) {
for(int ele = 0; ele < data1->getNumElements(firstStep, ent); ele++) {
if(data1->skipElement(firstStep, ent, ele)) continue;
int dim = data1->getDimension(firstStep, ent, ele);
if((dimension > 0) && (dim != dimension)) continue;
int numNodes = data1->getNumNodes(firstStep, ent, ele);
int type = data1->getType(firstStep, ent, ele);
int numComp = data1->getNumComponents(firstStep, ent, ele);
if(numComp != 1)
Msg::Error("Can only integrate scalar views over time");
std::vector<double> *out =
data2->incrementList(numComp, type, numNodes);
std::vector<double> x(numNodes), y(numNodes), z(numNodes);
for(int nod = 0; nod < numNodes; nod++)
data1->getNode(firstStep, 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]);
std::vector<double> val, t;
for(int step = firstStep + overTime; step < numSteps - 1; step++) {
if(!data1->hasTimeStep(step)) continue;
t.push_back(data1->getTime(step));
for(int nod = 0; nod < numNodes; nod++) {
double v;
data1->getValue(step, ent, ele, nod, 0, v);
val.push_back(v);
}
}
std::vector<double> timeIntegral(numNodes, 0.);
for(std::size_t step = 0; step < t.size() - 1; step++) {
double dt = t[step + 1] - t[step];
for(int nod = 0; nod < numNodes; nod++) {
timeIntegral[nod] += 0.5 *
(val[step * numNodes + nod] + val[(step + 1) * numNodes + nod]) * dt;
}
}
for(int nod = 0; nod < numNodes; nod++)
out->push_back(timeIntegral[nod]);
}
}
}
data2->setName(data1->getName() + "_Integrate");
data2->setFileName(data1->getName() + "_Integrate.pos");
data2->finalize();
return v2;
}
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