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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 "MeshSubEntities.h"
#include "GModel.h"
#include "discreteVertex.h"
#include "discreteEdge.h"
#include "discreteFace.h"
#include "MElement.h"
#include "MPoint.h"
#include "MLine.h"
#include "MTriangle.h"
#include "MQuadrangle.h"
#include "MEdge.h"
#include "MFace.h"
#include "Context.h"
StringXNumber MeshSubEntitiesOptions_Number[] = {
{GMSH_FULLRC, "InputDimension", nullptr, 1.},
{GMSH_FULLRC, "InputPhysicalGroup", nullptr, 1.},
{GMSH_FULLRC, "OuputDimension", nullptr, 0.},
{GMSH_FULLRC, "OuputPhysicalGroup", nullptr, 2000.},
};
extern "C" {
GMSH_Plugin *GMSH_RegisterMeshSubEntitiesPlugin()
{
return new GMSH_MeshSubEntitiesPlugin();
}
}
std::string GMSH_MeshSubEntitiesPlugin::getHelp() const
{
return "Plugin(MeshSubEntities) creates mesh elements for the "
"entities of dimension `OutputDimension' (0 for vertices, "
"1 for edges, 2 for faces) of the `InputPhysicalGroup' of "
"dimension `InputDimension'. The plugin creates new elements "
"belonging to `OutputPhysicalGroup'.";
}
int GMSH_MeshSubEntitiesPlugin::getNbOptions() const
{
return sizeof(MeshSubEntitiesOptions_Number) / sizeof(StringXNumber);
}
StringXNumber *GMSH_MeshSubEntitiesPlugin::getOption(int iopt)
{
return &MeshSubEntitiesOptions_Number[iopt];
}
PView *GMSH_MeshSubEntitiesPlugin::execute(PView *view)
{
int inputdim = (int)MeshSubEntitiesOptions_Number[0].def;
int inputphysical = (int)MeshSubEntitiesOptions_Number[1].def;
int outputdim = (int)MeshSubEntitiesOptions_Number[2].def;
int outphysical = (int)MeshSubEntitiesOptions_Number[3].def;
if(inputdim < 0 || inputdim > 3 || outputdim < 0 || outputdim > 3 ||
outputdim > inputdim) {
Msg::Error("Bad dimensions");
return view;
}
GModel *m = GModel::current();
std::map<int, std::vector<GEntity *> > groups;
m->getPhysicalGroups(inputdim, groups);
std::vector<GEntity *> entities = groups[inputphysical];
if(entities.empty()) {
Msg::Error("Physical group %d (dimension %d) is empty", inputphysical,
inputdim);
return view;
}
// get input elements
std::vector<MElement *> elements;
for(std::size_t i = 0; i < entities.size(); i++)
for(std::size_t j = 0; j < entities[i]->getNumMeshElements(); j++)
elements.push_back(entities[i]->getMeshElement(j));
if(outputdim == 0) { // create point elements for mesh vertices
std::set<MVertex *> vertices;
for(std::size_t i = 0; i < elements.size(); i++) {
for(std::size_t j = 0; j < elements[i]->getNumVertices(); j++) {
MVertex *v = elements[i]->getVertex(j);
vertices.insert(v);
}
}
for(auto it = vertices.begin(); it != vertices.end(); ++it) {
MVertex *v = *it;
GVertex *gv = nullptr;
if(v->onWhat() && v->onWhat()->dim() == 0) {
gv = (GVertex *)v->onWhat();
}
else {
gv = new discreteVertex(m, m->getMaxElementaryNumber(0) + 1);
v->setEntity(gv);
m->add(gv);
}
gv->physicals.push_back(outphysical);
if(gv->points.empty()) gv->points.push_back(new MPoint(v));
}
m->pruneMeshVertexAssociations();
}
else if(outputdim == 1) { // create line elements for mesh edges
std::set<MEdge, MEdgeLessThan> edges;
for(std::size_t i = 0; i < elements.size(); i++) {
for(int j = 0; j < elements[i]->getNumEdges(); j++) {
MEdge e = elements[i]->getEdge(j);
edges.insert(e);
}
}
for(auto it = edges.begin(); it != edges.end(); ++it) {
const MEdge &e = *it;
GEdge *ge = nullptr;
MVertex *v0 = e.getVertex(0), *v1 = e.getVertex(1);
if(v0->onWhat() && v1->onWhat()) {
if(v0->onWhat()->dim() == 1 &&
((v1->onWhat()->dim() == 1 && v0->onWhat() == v1->onWhat()) ||
v1->onWhat()->dim() == 0))
ge = (GEdge *)v0->onWhat();
else if(v1->onWhat()->dim() == 1 &&
((v0->onWhat()->dim() == 1 && v0->onWhat() == v1->onWhat()) ||
v0->onWhat()->dim() == 0))
ge = (GEdge *)v1->onWhat();
}
if(!ge) {
ge = new discreteEdge(m, m->getMaxElementaryNumber(1) + 1, nullptr,
nullptr);
v0->setEntity(ge);
v1->setEntity(ge);
m->add(ge);
}
ge->physicals.push_back(outphysical);
if(ge->lines.empty()) ge->lines.push_back(new MLine(v0, v1));
}
}
else {
Msg::Error("Plugin(MeshSubEntities) not coded yet for output dim %d",
outputdim);
}
CTX::instance()->mesh.changed = ENT_ALL;
return view;
}
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