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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkQuadEdgeMeshEulerOperatorSplitFacetFunction_hxx
#define itkQuadEdgeMeshEulerOperatorSplitFacetFunction_hxx
namespace itk
{
template <typename TMesh, typename TQEType>
auto
QuadEdgeMeshEulerOperatorSplitFacetFunction<TMesh, TQEType>::Evaluate(QEType * h, QEType * g) -> OutputType
{
//
// g->Dest() ---<----- X destPid --------- X //
// / g \ / \ \ //
// / \ dLnext \ \ //
// / \ / \ \ //
// / \ v ^ \ //
// / g->Left() \ / \ \ //
// X = X X newEdge X //
// \ h->Left() / \ \ / //
// \ / \ \ ^ //
// \ / \ \ / //
// \ / \ \ oLnext //
// \ h / \ \ / //
// X ----->--- h->Dest() X --------- orgPid //
//
if (!h || !g)
{
itkDebugMacro("At least one of the Input is not an edge.");
return ((QEType *)nullptr);
}
if (!this->m_Mesh)
{
itkDebugMacro("No mesh present.");
return ((QEType *)nullptr);
}
if (h == g)
{
itkDebugMacro("Provided edges should be different.");
return ((QEType *)nullptr);
}
if (h->GetLeft() != g->GetLeft())
{
itkDebugMacro("The edges are not around the same face.");
return ((QEType *)nullptr);
}
if ((h->GetLnext() == g) || (g->GetLnext() == h))
{
itkDebugMacro("Provided edges should NOT be consecutive.");
return ((QEType *)nullptr);
}
using VertexRefType = typename MeshType::VertexRefType;
this->m_Mesh->DeleteFace(h->GetLeft());
VertexRefType orgPid = h->GetDestination();
VertexRefType destPid = g->GetDestination();
// Create an new isolated edge and set its geometry:
auto * newEdge = new EdgeCellType;
QEType * newEdgeGeom = newEdge->GetQEGeom();
// see the code of e.g. AddFace
newEdgeGeom->SetOrigin(orgPid);
newEdgeGeom->SetDestination(destPid);
// Insert newEdge at Org
QEType * oLnext = h->GetLnext();
oLnext->InsertAfterNextBorderEdgeWithUnsetLeft(newEdgeGeom);
// Insert newEdge at Dest
QEType * dLnext = g->GetLnext();
dLnext->InsertAfterNextBorderEdgeWithUnsetLeft(newEdgeGeom->GetSym());
// Add the new edge to the container
this->m_Mesh->PushOnContainer(newEdge);
// Build two new faces
this->m_Mesh->AddFace(h);
this->m_Mesh->AddFace(g);
this->m_Mesh->Modified();
return (newEdgeGeom);
}
} // end namespace itk
#endif
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