Question

所以我有以下内容应该为CGAL创建一个Delaunay三角形类型：

std::vector<Point> points = createPoints() // Fills points, This works. 
Delaunay dt(points.begin(), points.end());

根据this问题和手册here。这应该有效，但是我收到以下错误：

[100%] Building CXX object src/utilities/TriangulationVolumeCalculation/CMakeFiles/calculateVolumeDifference.dir/CalculateVolumeDifference.cpp.o
/home/uqbdart/SMG/sao2/src/utilities/TriangulationVolumeCalculation/CalculateVolumeDifference.cpp: In function â€˜void fillDelaunay(Delaunay&, std::vector<std::vector<double> >)â€™:
/home/uqbdart/SMG/sao2/src/utilities/TriangulationVolumeCalculation/CalculateVolumeDifference.cpp:31:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
/home/uqbdart/SMG/sao2/src/utilities/TriangulationVolumeCalculation/CalculateVolumeDifference.cpp: In function â€˜int main(int, char**)â€™:
/home/uqbdart/SMG/sao2/src/utilities/TriangulationVolumeCalculation/CalculateVolumeDifference.cpp:50:27: error: no matching function for call to â€˜CGAL::Delaunay_triangulation_2<CGAL::Projection_traits_xy_3<CGAL::Epick> >::Delaunay_triangulation_2(std::vector<CGAL::Point_3<CGAL::Epick> >::iterator&, std::vector<CGAL::Point_3<CGAL::Epick> >::iterator&)â€™
/home/uqbdart/SMG/sao2/src/utilities/TriangulationVolumeCalculation/CalculateVolumeDifference.cpp:50:27: note: candidates are:
In file included from /home/uqbdart/SMG/sao2/src/utilities/TriangulationVolumeCalculation/CalculateVolumeDifference.cpp:3:0:
/usr/local/include/CGAL/Delaunay_triangulation_2.h:89:3: note: CGAL::Delaunay_triangulation_2<Gt, Tds>::Delaunay_triangulation_2(const CGAL::Delaunay_triangulation_2<Gt, Tds>&) [with Gt = CGAL::Projection_traits_xy_3<CGAL::Epick>; Tds = CGAL::Triangulation_data_structure_2<CGAL::Triangulation_vertex_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>, CGAL::Triangulation_ds_vertex_base_2<void> >, CGAL::Triangulation_ds_face_base_2<void> >]
/usr/local/include/CGAL/Delaunay_triangulation_2.h:89:3: note:   candidate expects 1 argument, 2 provided
/usr/local/include/CGAL/Delaunay_triangulation_2.h:86:2: note: CGAL::Delaunay_triangulation_2<Gt, Tds>::Delaunay_triangulation_2(const Gt&) [with Gt = CGAL::Projection_traits_xy_3<CGAL::Epick>; Tds = CGAL::Triangulation_data_structure_2<CGAL::Triangulation_vertex_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>, CGAL::Triangulation_ds_vertex_base_2<void> >, CGAL::Triangulation_ds_face_base_2<void> >]
/usr/local/include/CGAL/Delaunay_triangulation_2.h:86:2: note:   candidate expects 1 argument, 2 provided
make[2]: *** [src/utilities/TriangulationVolumeCalculation/CMakeFiles/calculateVolumeDifference.dir/CalculateVolumeDifference.cpp.o] Error 1
make[1]: *** [src/utilities/TriangulationVolumeCalculation/CMakeFiles/calculateVolumeDifference.dir/all] Error 2
make: *** [all] Error 2

手册指出：

 Precondition:  The value_type of first and last is Point.

第一个和最后一个是开始和结束迭代器。

编辑：我这样解决了这个问题：

Delaunay dt;
dt.insert(points.begin(), points.end());

虽然它已修复，但根据手册，所需迭代器的类型声明是相同的。为什么它会在构造函数中失败而不在insert函数中失败。

Answer 1

任何机会，你会使用旧的CGAL版本吗？如果内存对我有好处，那么来自范围的这个构造函数比insert（）函数引入得晚。好吧，只需检查代码。

Answer 2

问题可能是您的班级Point没有必要的方法成为Delaunay_triangulation_2的模板参数（我猜您曾经用来定义班级Delaunay）

班级Delaunay和Point的定义是什么？

有用的例子可以在这里找到： http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Triangulation_2/Chapter_main.html

构造CGAL c ++的模板化类型

2 个答案: