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* |
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* Created by Charles F. Vardeman II on 11 Dec 2006. |
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* @author Charles F. Vardeman II |
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* @version $Id: AlphaShape.cpp,v 1.1 2007-12-07 00:48:47 chuckv Exp $ |
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* @version $Id: AlphaShape.cpp,v 1.2 2008-05-14 14:31:48 chuckv Exp $ |
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* |
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*/ |
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#include <iostream> |
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#include <list> |
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#include <fstream> |
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#include <CGAL/IO/Geomview_stream.h> |
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#include <CGAL/IO/alpha_shape_geomview_ostream_3.h> |
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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h> |
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#include <CGAL/Delaunay_triangulation_3.h> |
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#include <CGAL/Triangulation_hierarchy_3.h> |
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#include <CGAL/Alpha_shape_3.h> |
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#include <CGAL/Tetrahedron_3.h> |
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struct K : CGAL::Exact_predicates_inexact_constructions_kernel {}; |
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typedef K::Point_3 Point; |
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typedef Alpha_shape_3::Alpha_iterator Alpha_iterator; |
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typedef Alpha_shape_3::NT NT; |
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typedef Alpha_shape_3::Cell_handle Cell_handle; |
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typedef Alpha_shape_3::Vertex_handle Vertex_handle; |
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typedef Alpha_shape_3::Facet Facet; |
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typedef Alpha_shape_3::Edge Edge; |
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typedef CGAL::Tetrahedron_3<K> Tetrahedron; |
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– |
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using namespace oopse; |
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AlphaShape::AlphaShape(){} |
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Delaunay_hierarchy dt; |
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//points.reserve(pos.size()); |
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// Copy the positon vector into a points vector for cgal. |
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for (int i = 0; i < pos.size(); ++i) |
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for (unsigned int i = 0; i < pos.size(); ++i) |
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{ |
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Point pt(pos[i][0],pos[i][1],pos[i][2]); |
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dt.insert(pt); |
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} |
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/* Generate Alpha Shape */ |
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std::cout << "Generating alpha shape" << std::endl; |
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Alpha_shape_3 ashape(dt); |
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/*CGAL::Geomview_stream gv(CGAL::Bbox_3(0,0,0, 2, 2, 2)); |
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/* |
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CGAL::Geomview_stream gv(CGAL::Bbox_3(0,0,0, 2, 2, 2)); |
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gv.set_line_width(4); |
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gv.set_trace(false); |
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gv.set_bg_color(CGAL::Color(0, 200, 200)); |
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gv.clear();*/ |
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std::cout << ashape; |
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gv.clear(); |
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*/ |
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Alpha_shape_3::NT alpha_solid = ashape.find_alpha_solid(); |
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Alpha_iterator opt = ashape.find_optimal_alpha(1); |
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std::cout << "Smallest alpha value to get a solid through data points is " |
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<< alpha_solid << std::endl; |
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std::cout << "Optimal alpha value to get one connected component is " |
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<< *opt << std::endl; |
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ashape.set_alpha(*opt); |
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assert(ashape.number_of_solid_components() == 1); |
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std::list<Cell_handle> cells; |
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std::list<Facet> facets; |
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std::list<Edge> edges; |
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std::list<Vertex_handle> vertices; |
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ashape.get_alpha_shape_cells(std::back_inserter(cells), |
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Alpha_shape_3::INTERIOR); |
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ashape.get_alpha_shape_facets(std::back_inserter(facets), |
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Alpha_shape_3::REGULAR); |
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ashape.get_alpha_shape_facets(std::back_inserter(facets), |
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Alpha_shape_3::SINGULAR); |
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ashape.get_alpha_shape_edges(std::back_inserter(edges), |
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Alpha_shape_3::SINGULAR); |
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ashape.get_alpha_shape_vertices(std::back_inserter(vertices), |
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Alpha_shape_3::REGULAR); |
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std::cout << " The 0-shape has : " << std::endl; |
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std::cout << cells.size() << " interior tetrahedra" << std::endl; |
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std::cout << facets.size() << " boundary facets" << std::endl; |
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std::cout << edges.size() << " singular edges" << std::endl; |
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std::cout << vertices.size() << " singular vertices" << std::endl; |
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RealType volume_; |
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std::list<Cell_handle>::iterator thiscell; |
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for(Alpha_shape_3::Cell_iterator c_it = ashape.cells_begin(); c_it != ashape.cells_end(); ++c_it) |
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{ |
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volume_ += ashape.tetrahedron(c_it).volume(); |
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} |
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//gv << (Delaunay) ashape; |
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//std::cout << ashape; |
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} |
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RealType AlphaShape::getVolume() |
