95 lines
3.4 KiB
C
95 lines
3.4 KiB
C
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/*
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* Software License Agreement (BSD License)
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*
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* Point Cloud Library (PCL) - www.pointclouds.org
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* Copyright (c) 2009-2012, Willow Garage, Inc.
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* Copyright (c) 2012-, Open Perception, Inc.
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of the copyright holder(s) nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id$
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*
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*/
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#pragma once
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#include <vector>
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namespace pcl {
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namespace geometry {
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/**
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* \brief Get a collection of boundary half-edges for the input mesh.
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* \param[in] mesh The input mesh.
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* \param[out] boundary_he_collection Collection of boundary half-edges. Each element in
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* the vector is one connected boundary. The whole boundary is the union of all
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* elements.
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* \param [in] expected_size If you already know the size of the longest
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* boundary you can tell this here. Defaults to 3 (minimum possible boundary).
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* \author Martin Saelzle
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* \ingroup geometry
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*/
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template <class MeshT>
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void
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getBoundBoundaryHalfEdges(
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const MeshT& mesh,
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std::vector<typename MeshT::HalfEdgeIndices>& boundary_he_collection,
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const std::size_t expected_size = 3)
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{
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using Mesh = MeshT;
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using HalfEdgeIndex = typename Mesh::HalfEdgeIndex;
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using HalfEdgeIndices = typename Mesh::HalfEdgeIndices;
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using IHEAFC = typename Mesh::InnerHalfEdgeAroundFaceCirculator;
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boundary_he_collection.clear();
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HalfEdgeIndices boundary_he;
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boundary_he.reserve(expected_size);
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std::vector<bool> visited(mesh.sizeEdges(), false);
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IHEAFC circ, circ_end;
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for (HalfEdgeIndex i(0); i < HalfEdgeIndex(mesh.sizeHalfEdges()); ++i) {
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if (mesh.isBoundary(i) && !visited[pcl::geometry::toEdgeIndex(i).get()]) {
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boundary_he.clear();
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circ = mesh.getInnerHalfEdgeAroundFaceCirculator(i);
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circ_end = circ;
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do {
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visited[pcl::geometry::toEdgeIndex(circ.getTargetIndex()).get()] = true;
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boundary_he.push_back(circ.getTargetIndex());
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} while (++circ != circ_end);
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boundary_he_collection.push_back(boundary_he);
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}
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}
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}
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} // End namespace geometry
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} // End namespace pcl
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