get_boundary.h
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#pragma once
#include <vector>
namespace pcl
{
namespace geometry
{
/** \brief Get a collection of boundary half-edges for the input mesh.
* \param[in] mesh The input mesh.
* \param[out] boundary_he_collection Collection of boundary half-edges. Each element in the vector is one connected boundary. The whole boundary is the union of all elements.
* \param [in] expected_size If you already know the size of the longest boundary you can tell this here. Defaults to 3 (minimum possible boundary).
* \author Martin Saelzle
* \ingroup geometry
*/
template <class MeshT> void
getBoundBoundaryHalfEdges (const MeshT& mesh,
std::vector <typename MeshT::HalfEdgeIndices>& boundary_he_collection,
const std::size_t expected_size = 3)
{
using Mesh = MeshT;
using HalfEdgeIndex = typename Mesh::HalfEdgeIndex;
using HalfEdgeIndices = typename Mesh::HalfEdgeIndices;
using IHEAFC = typename Mesh::InnerHalfEdgeAroundFaceCirculator;
boundary_he_collection.clear ();
HalfEdgeIndices boundary_he; boundary_he.reserve (expected_size);
std::vector <bool> visited (mesh.sizeEdges (), false);
IHEAFC circ, circ_end;
for (HalfEdgeIndex i (0); i<HalfEdgeIndex (mesh.sizeHalfEdges ()); ++i)
{
if (mesh.isBoundary (i) && !visited [pcl::geometry::toEdgeIndex (i).get ()])
{
boundary_he.clear ();
circ = mesh.getInnerHalfEdgeAroundFaceCirculator (i);
circ_end = circ;
do
{
visited [pcl::geometry::toEdgeIndex (circ.getTargetIndex ()).get ()] = true;
boundary_he.push_back (circ.getTargetIndex ());
} while (++circ != circ_end);
boundary_he_collection.push_back (boundary_he);
}
}
}
} // End namespace geometry
} // End namespace pcl
pcl
This file defines compatibility wrappers for low level I/O functions.
Definition: convolution.h:45
Mesh
Definition: surface.h:13
pcl::geometry::HalfEdgeIndex
Index used to access elements in the half-edge mesh.
Definition: mesh_indices.h:200
pcl::geometry::EdgeIndex::get
int get() const
Get the index.
Definition: mesh_indices.h:382
pcl::geometry::getBoundBoundaryHalfEdges
void getBoundBoundaryHalfEdges(const MeshT &mesh, std::vector< typename MeshT::HalfEdgeIndices > &boundary_he_collection, const std::size_t expected_size=3)
Get a collection of boundary half-edges for the input mesh.
Definition: get_boundary.h:57
pcl::geometry::toEdgeIndex
pcl::geometry::EdgeIndex toEdgeIndex(const HalfEdgeIndex &index)
Convert the given half-edge index to an edge index.
Definition: mesh_indices.h:615