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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004-2016 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
#ifndef __VCGLIB_MESH_ASSERT
#define __VCGLIB_MESH_ASSERT
namespace vcg {
namespace tri {
/**
* \brief For checking the adequacy of a mesh to a given algorithm.
*
* While the many RequireXXX functions allow to check the static correctness of a mesh and
* have a O(1) complexity, in many cases we need to run more complex checks to be sure that
* the subsequent algorithm can run without issues.
* Typical cases are the fact that there are no unreferenced vertices (NoUnreferencedVertex)
* or a given adjacency is correctly initialized (and not only statically present as a type component).
*
* Naming Notes:
* - First two letters of the function name code the required adjacency involved
* - The exception text completes the sentence "This exception is thronw when/because...
*
*/
template <class MeshType>
class MeshAssert
{
public:
typedef typename MeshType::VertexType VertexType;
typedef typename MeshType::VertexIterator VertexIterator;
typedef typename MeshType::FaceType FaceType;
typedef typename MeshType::FaceIterator FaceIterator;
typedef typename MeshType::CoordType CoordType;
typedef typename MeshType::ScalarType ScalarType;
/// \brief Throw vcg::MissingPreconditionException if FF adjacency is not initialized
static void FFAdjacencyIsInitialized(MeshType &m)
{
for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi)
{
if(!fi->IsD())
for(int i=0;i<fi->VN();++i)
{
if(fi->FFp(i)==0)
throw vcg::MissingPreconditionException("FF adjacency is not initialized");
}
}
}
/// \brief Throw vcg::MissingPreconditionException if VF adjacency is not initialized
static void VFAdjacencyIsInitialized(MeshType &m)
{
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if(!vi->IsD())
{
if(vi->VFp() == nullptr)
throw vcg::MissingPreconditionException("VF adjacency is not initialized");
}
}
/// \brief Throw vcg::MissingPreconditionException if EE adjacency is not initialized
static void EEAdjacencyIsInitialized(MeshType &m)
{
for(auto ei=m.edge.begin();ei!=m.edge.end();++ei) if(!ei->IsD())
{
if(ei->EEp(0)==0)
throw vcg::MissingPreconditionException("EE adjacency is not initialized");
}
}
/// \brief Throw vcg::MissingPreconditionException if According to EE adjacency, the edge mesh is not 1-manifold (e.g there are more than 2 edges on a vertex)
static void EEOneManifold(MeshType &m)
{
EEAdjacencyIsInitialized(m);
for(auto ei=m.edge.begin();ei!=m.edge.end();++ei) if(!ei->IsD())
{
if(! edge::IsEdgeManifold(*ei,0) )
throw vcg::MissingPreconditionException("According to EE adjacency, the edge mesh is not 1-manifold (e.g there are more than 2 edges on a vertex)");
}
}
/// \brief Throw vcg::MissingPreconditionException if Vertex Normals are not unit lenght
static void VertexNormalNormalized(MeshType &m)
{
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if(!vi->IsD())
{
if(fabs(vi->cN().Norm()-1.0)>0.000001)
throw vcg::MissingPreconditionException("Vertex Normal are not normalized");
}
}
/// \brief Throw vcg::MissingPreconditionException if There are unreferenced vertices
static void NoUnreferencedVertex(MeshType &m)
{
UpdateFlags<MeshType>::VertexClearV(m);
for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi) if(!fi->IsD())
{
for(int i=0;i<fi->VN();++i) fi->V(i)->SetV();
}
for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi)
if(!vi->IsD())
{
if(!vi->IsV())
throw vcg::MissingPreconditionException("There are unreferenced vertices");
}
}
/// \brief Throw vcg::MissingPreconditionException if There are faces with more than three vertices
static void OnlyTriFace(MeshType &m)
{
for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi) if(!fi->IsD())
{
if(fi->VN()!=3)
throw vcg::MissingPreconditionException("There are faces with more than three vertices");
}
}
/// \brief Throw vcg::MissingPreconditionException if There are non quadrilateral faces
static void OnlyQuadFace(MeshType &m)
{
for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi) if(!fi->IsD())
{
if(fi->VN()!=4)
throw vcg::MissingPreconditionException("There are non quadrilateral faces");
}
}
/// \brief Throw vcg::MissingPreconditionException if The mesh is not composed only by edges (no faces needed or allowed)
static void OnlyEdgeMesh(MeshType &m)
{
if(m.FN()>0)
throw vcg::MissingPreconditionException("The mesh is not composed only by edges (no faces needed or allowed)");
}
/// \brief Throw vcg::MissingPreconditionException if According to FF adjacency, the mesh is not two manifold (e.g. there are more than two faces on an edge)
static void FFTwoManifoldEdge(MeshType & m)
{
for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi) if(!fi->IsD())
{
for(int i=0;i<fi->VN();++i){
if(!face::IsManifold(*fi,i))
throw vcg::MissingPreconditionException("According to FF adjacency, the mesh is not two manifold (e.g. there are more than two faces on an edge)");
}
}
}
};
} // end namespace tri
} // end namespace vcg
#endif // __VCGLIB_MESH_ASSERT
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