/**
* \file AddLayerToMesh.cpp
* \date 2016-01-18
* \brief Implementation of AddLayerToMesh class.
*
* \copyright
* Copyright (c) 2012-2016, OpenGeoSys Community (http://www.opengeosys.org)
* Distributed under a Modified BSD License.
* See accompanying file LICENSE.txt or
* http://www.opengeosys.org/project/license
*
*/
#include "AddLayerToMesh.h"
#include <algorithm>
#include <map>
#include <memory>
#include <numeric>
#include <vector>
#include "logog/include/logog.hpp"
#include "MeshLib/Mesh.h"
#include "MeshLib/Node.h"
#include "MeshLib/Elements/Elements.h"
#include "MeshLib/MeshSurfaceExtraction.h"
#include "MeshLib/MeshEditing/DuplicateMeshComponents.h"
#include "MeshLib/MeshEditing/FlipElements.h"
namespace MeshLib
{
/** Extrudes point, line, triangle or quad elements to its higher dimensional
* versions, i.e. line, quad, prism, hexahedron.
*
* @param subsfc_nodes the nodes the elements are based on
* @param sfc_elem the element of the surface that will be extruded
* @param sfc_to_subsfc_id_map relation between the surface nodes of the surface
* element and the ids of the nodes of the subsurface mesh
* @param subsfc_sfc_id_map mapping of the surface nodes of the current mesh
* to the surface nodes of the extruded mesh
*
* @return extruded element (point -> line, line -> quad, tri -> prism, quad ->
* hexahedron)
*/
MeshLib::Element* extrudeElement(std::vector<MeshLib::Node*> const& subsfc_nodes,
MeshLib::Element const& sfc_elem,
MeshLib::PropertyVector<std::size_t> const& sfc_to_subsfc_id_map,
std::map<std::size_t, std::size_t> const& subsfc_sfc_id_map)
{
if (sfc_elem.getDimension() > 2)
return nullptr;
const unsigned nElemNodes(sfc_elem.getNBaseNodes());
MeshLib::Node** new_nodes = new MeshLib::Node*[2*nElemNodes];
for (unsigned j=0; j<nElemNodes; ++j)
{
std::size_t const subsfc_id(
sfc_to_subsfc_id_map[sfc_elem.getNode(j)->getID()]);
new_nodes[j] = subsfc_nodes[subsfc_id];
std::size_t new_idx = (nElemNodes==2) ? (3-j) : (nElemNodes+j);
new_nodes[new_idx] = subsfc_nodes[subsfc_sfc_id_map.at(subsfc_id)];
}
if (sfc_elem.getGeomType() == MeshLib::MeshElemType::LINE)
return new MeshLib::Quad(new_nodes);
if (sfc_elem.getGeomType() == MeshLib::MeshElemType::TRIANGLE)
return new MeshLib::Prism(new_nodes);
if (sfc_elem.getGeomType() == MeshLib::MeshElemType::QUAD)
return new MeshLib::Hex(new_nodes);
return nullptr;
}
MeshLib::Mesh* addTopLayerToMesh(MeshLib::Mesh const& mesh,
double thickness,
std::string const& name)
{
return addLayerToMesh(mesh, thickness, name, true);
}
MeshLib::Mesh* addBottomLayerToMesh(MeshLib::Mesh const& mesh,
double thickness,
std::string const& name)
{
return addLayerToMesh(mesh, thickness, name, false);
}
MeshLib::Mesh* addLayerToMesh(MeshLib::Mesh const& mesh, double thickness,
std::string const& name,
bool on_top)
{
INFO("Extracting top surface of mesh \"%s\" ... ", mesh.getName().c_str());
int const flag = (on_top) ? -1 : 1;
const MathLib::Vector3 dir(0, 0, flag);
double const angle(90);
std::unique_ptr<MeshLib::Mesh> sfc_mesh (nullptr);
std::string const prop_name("OriginalSubsurfaceNodeIDs");
if (mesh.getDimension() == 3)
sfc_mesh.reset(MeshLib::MeshSurfaceExtraction::getMeshSurface(
mesh, dir, angle, prop_name));
else {
sfc_mesh = (on_top) ? std::unique_ptr<MeshLib::Mesh>(new MeshLib::Mesh(mesh)) :
std::unique_ptr<MeshLib::Mesh>(MeshLib::createFlippedMesh(mesh));
// add property storing node ids
boost::optional<MeshLib::PropertyVector<std::size_t>&> pv(
sfc_mesh->getProperties().createNewPropertyVector<std::size_t>(
prop_name, MeshLib::MeshItemType::Node, 1));
if (pv) {
pv->resize(sfc_mesh->getNNodes());
std::iota(pv->begin(), pv->end(), 0);
} else {
ERR("Could not create and initialize property.");
return nullptr;
}
}
INFO("done.");
// *** add new surface nodes
std::vector<MeshLib::Node*> subsfc_nodes =
MeshLib::copyNodeVector(mesh.getNodes());
std::vector<MeshLib::Element*> subsfc_elements =
MeshLib::copyElementVector(mesh.getElements(), subsfc_nodes);
std::size_t const n_subsfc_nodes(subsfc_nodes.size());
std::vector<MeshLib::Node*> const& sfc_nodes(sfc_mesh->getNodes());
std::size_t const n_sfc_nodes(sfc_nodes.size());
// fetch subsurface node ids PropertyVector
boost::optional<MeshLib::PropertyVector<std::size_t> const&> opt_node_id_pv(
sfc_mesh->getProperties().getPropertyVector<std::size_t>(prop_name));
if (!opt_node_id_pv) {
ERR(
"Need subsurface node ids, but the property \"%s\" is not "
"available.",
prop_name.c_str());
return nullptr;
}
MeshLib::PropertyVector<std::size_t> const& node_id_pv(*opt_node_id_pv);
// *** copy sfc nodes to subsfc mesh node
std::map<std::size_t, std::size_t> subsfc_sfc_id_map;
for (std::size_t k(0); k<n_sfc_nodes; ++k) {
std::size_t const subsfc_id(node_id_pv[k]);
std::size_t const sfc_id(k+n_subsfc_nodes);
subsfc_sfc_id_map.insert(std::make_pair(subsfc_id, sfc_id));
MeshLib::Node const& node(*sfc_nodes[k]);
subsfc_nodes.push_back(new MeshLib::Node(
node[0], node[1], node[2] - (flag * thickness), sfc_id));
}
// *** insert new layer elements into subsfc_mesh
std::vector<MeshLib::Element*> const& sfc_elements(sfc_mesh->getElements());
std::size_t const n_sfc_elements(sfc_elements.size());
for (std::size_t k(0); k<n_sfc_elements; ++k)
subsfc_elements.push_back(extrudeElement(subsfc_nodes, *sfc_elements[k],
node_id_pv,
subsfc_sfc_id_map));
auto new_mesh = new MeshLib::Mesh(name, subsfc_nodes, subsfc_elements);
boost::optional<MeshLib::PropertyVector<int> const&> opt_materials(
mesh.getProperties().getPropertyVector<int>("MaterialIDs")
);
if (opt_materials) {
boost::optional<PropertyVector<int> &> new_materials(
new_mesh->getProperties().createNewPropertyVector<int>("MaterialIDs",
MeshLib::MeshItemType::Cell, 1));
if (!new_materials) {
ERR("Can not set material properties for new layer");
} else {
new_materials->reserve(subsfc_elements.size());
int new_layer_id (*(std::max_element(opt_materials->cbegin(), opt_materials->cend()))+1);
std::copy(opt_materials->cbegin(), opt_materials->cend(), std::back_inserter(*new_materials));
auto const n_new_props(subsfc_elements.size()-mesh.getNElements());
std::fill_n(std::back_inserter(*new_materials), n_new_props, new_layer_id);
}
} else {
ERR(
"Could not copy the property \"MaterialIDs\" since the original "
"mesh does not contain such a property.");
}
return new_mesh;
}
} // namespace MeshLib