Centos7.2 eclipse使用CGAL求主骨架

环境说明

centos7.2 1511版本，直接使用eclipse IDE可执行文件。eclipse版本：eclipse-cpp-neon-1a-linux-gtk-x86_64.tar.gz    Eclipse IDE for C/C++ Developers    Version: Neon.1a Release (4.6.1)    Build id: 20161007-1200

Centos7.2安装CGAL请查看之前文章

打开eclipse创建C++可执行文件工程

新建main.cpp文件，使用官网example：

#include "print.h"typedef CGAL::Exact_predicates_inexact_constructions_kernel K ;typedef K::Point_2                   Point ;typedef CGAL::Polygon_2<K>           Polygon_2 ;typedef CGAL::Straight_skeleton_2<K> Ss ;typedef boost::shared_ptr<Ss> SsPtr ;int main(){  Polygon_2 poly ;  poly.push_back( Point(-1,-1) ) ;  poly.push_back( Point(0,-12) ) ;  poly.push_back( Point(1,-1) ) ;  poly.push_back( Point(12,0) ) ;  poly.push_back( Point(1,1) ) ;  poly.push_back( Point(0,12) ) ;  poly.push_back( Point(-1,1) ) ;  poly.push_back( Point(-12,0) ) ;  // You can pass the polygon via an iterator pair  SsPtr iss = CGAL::create_interior_straight_skeleton_2(poly.vertices_begin(), poly.vertices_end());  // Or you can pass the polygon directly, as below.  // To create an exterior straight skeleton you need to specify a maximum offset.  double lMaxOffset = 5 ;   SsPtr oss = CGAL::create_exterior_straight_skeleton_2(lMaxOffset, poly);  print_straight_skeleton(*iss);  print_straight_skeleton(*oss);  return 0;}

 1.编译提示无法找到print.h文件：    从./cgal-releases-CGAL-4.7/Straight_skeleton_2/examples/Straight_skeleton_2目录下复制该文件到工程源文件夹下，与main.cpp文件在一起。 2.编译提示缺少库：

3.编译成功后运行结果：Straight skeleton with 10 vertices, 34 halfedges and 8 faces(-12,0)->(-1,-1) contour(-1,-1)->(-12,0) contour(-1,-1)->(0,-12) contour(0,-12)->(-1,-1) contour(0,-12)->(1,-1) contour(1,-1)->(0,-12) contour(1,-1)->(12,0) contour(12,0)->(1,-1) contour(12,0)->(1,1) contour(1,1)->(12,0) contour(1,1)->(0,12) contour(0,12)->(1,1) contour(0,12)->(-1,1) contour(-1,1)->(0,12) contour(-1,1)->(-12,0) contour(-12,0)->(-1,1) contour(-1,-1)->(5.3871e-17,-1.23134e-16) bisector(5.3871e-17,-1.23134e-16)->(-1,-1) bisector(0,-12)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(0,-12) bisector(1,-1)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(1,-1) bisector(12,0)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(12,0) bisector(1,1)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(1,1) bisector(0,12)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(0,12) bisector(-1,1)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(-1,1) bisector(-12,0)->(5.3871e-17,-1.23134e-16) bisector(5.3871e-17,-1.23134e-16)->(-12,0) bisector(5.3871e-17,-1.23134e-16)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(5.3871e-17,-1.23134e-16) bisector

修改输出骨架点skeleton vertex

在print.h文件中添加输出函数：

template<class K>void print_straight_skeleton_vertex( CGAL::Straight_skeleton_2<K> const& ss ){  typedef CGAL::Straight_skeleton_2<K> Ss ;  typedef typename Ss::Vertex_const_handle     Vertex_const_handle ;  typedef typename Ss::Vertex_const_iterator   Vertex_const_iterator;  typedef typename Ss::Halfedge_const_handle   Halfedge_const_handle ;  typedef typename Ss::Halfedge_const_iterator Halfedge_const_iterator ;  Halfedge_const_handle null_halfedge ;  Vertex_const_handle   null_vertex ;  std::cout << "Straight skeleton with " << ss.size_of_vertices()            << " vertices, " << ss.size_of_halfedges()            << " halfedges and " << ss.size_of_faces()            << " faces" << std::endl ;  for ( Halfedge_const_iterator i = ss.halfedges_begin(); i != ss.halfedges_end(); ++i )  {    print_point(i->opposite()->vertex()->point()) ;    std::cout << "->" ;    print_point(i->vertex()->point());    std::cout << " " << ( i->is_bisector() ? "bisector" : "contour" ) << std::endl;  }  for ( Vertex_const_iterator j = ss.vertices_begin(); j != ss.vertices_end(); ++j )  {    print_point(j->point());    std::cout << ( j->is_skeleton() ? "skeleton vertex" : "contour vertex" )<< std::endl;  }}

输出为：Straight skeleton with 10 vertices, 34 halfedges and 8 faces(-12,0)->(-1,-1) contour(-1,-1)->(-12,0) contour(-1,-1)->(0,-12) contour(0,-12)->(-1,-1) contour(0,-12)->(1,-1) contour(1,-1)->(0,-12) contour(1,-1)->(12,0) contour(12,0)->(1,-1) contour(12,0)->(1,1) contour(1,1)->(12,0) contour(1,1)->(0,12) contour(0,12)->(1,1) contour(0,12)->(-1,1) contour(-1,1)->(0,12) contour(-1,1)->(-12,0) contour(-12,0)->(-1,1) contour(-1,-1)->(5.3871e-17,-1.23134e-16) bisector(5.3871e-17,-1.23134e-16)->(-1,-1) bisector(0,-12)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(0,-12) bisector(1,-1)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(1,-1) bisector(12,0)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(12,0) bisector(1,1)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(1,1) bisector(0,12)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(0,12) bisector(-1,1)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(-1,1) bisector(-12,0)->(5.3871e-17,-1.23134e-16) bisector(5.3871e-17,-1.23134e-16)->(-12,0) bisector(5.3871e-17,-1.23134e-16)->(-1.23134e-16,-1.07742e-16) bisector(-1.23134e-16,-1.07742e-16)->(5.3871e-17,-1.23134e-16) bisector(-1,-1)contour vertex(0,-12)contour vertex(1,-1)contour vertex(12,0)contour vertex(1,1)contour vertex(0,12)contour vertex(-1,1)contour vertex(-12,0)contour vertex(5.3871e-17,-1.23134e-16)skeleton vertex(-1.23134e-16,-1.07742e-16)skeleton vertex

说明：

实验代码中只运行了   create_interior_straight_skeleton_2