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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 itkQuadEdgeMeshEulerOperatorSplitVertexFunction_hxx
#define itkQuadEdgeMeshEulerOperatorSplitVertexFunction_hxx
namespace itk
{
template <typename TMesh, typename TQEType>
auto
QuadEdgeMeshEulerOperatorSplitVertexFunction<TMesh, TQEType>::Evaluate(QEType * h, QEType * g) -> OutputType
{
if (!this->m_Mesh)
{
itkDebugMacro("No mesh present.");
return ((QEType *)nullptr);
}
if ((h == (QEType *)nullptr) || (g == (QEType *)nullptr))
{
itkDebugMacro("One or more argument(s) is(are) null.");
return ((QEType *)nullptr);
}
if (h == g)
{
itkDebugMacro("The two half-edges are the same. No antenna allowed.");
return ((QEType *)nullptr);
}
if (h->GetDestination() != g->GetDestination())
{
itkDebugMacro("The two half-edges must be incident to the same vertex.");
return ((QEType *)nullptr);
}
// delete the faces
this->m_Mesh->DeleteFace(h->GetRight());
this->m_Mesh->DeleteFace(g->GetRight());
// splice to create a new point and disconnect the rings
this->m_NewPoint = this->m_Mesh->Splice(h->GetSym(), g->GetSym());
// then add a new edge
QEType * ReturnedEdge = this->m_Mesh->AddEdge(g->GetDestination(), h->GetDestination());
// Build two new faces
this->m_Mesh->AddFace(h->GetSym());
this->m_Mesh->AddFace(g->GetSym());
this->m_Mesh->Modified();
return (ReturnedEdge);
}
} // end namespace itk
#endif
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