使用 boost::geometry::buffer 函数

Posted 2023-02-21

【中文标题】使用 boost::geometry::buffer 函数

【英文标题】：using boost::geometry::buffer function

【发布时间】：2019-03-08 15:40:25

【问题描述】：

这是我第一次使用 boost 库，所以我对此感到很不舒服，而且我可能做错了什么。我在使用 boost::geometry::buffer() 函数时遇到了一些问题。

这是我的代码：

#include <vector>
#include <boost\geometry.hpp>
#include <boost\geometry\geometries\register\point.hpp>

struct PNT_2D

    double x, y;
;
BOOST_GEOMETRY_REGISTER_POINT_2D(PNT_2D, double, boost::geometry::cs::cartesian, x, y);
typedef boost::geometry::model::polygon<PNT_2D, false>  BoostPolygon;
typedef std::vector<PNT_2D>                             StlPolygon;

int main(int argc, char * argv[])

    int             nStaph;
    BoostPolygon    polygon;
    BoostPolygon    off_polygon;
    PNT_2D          p2dPunto;
    StlPolygon      stlPolygon;

    stlPolygon.resize(5);
    stlPolygon[0].x = stlPolygon[0].y = stlPolygon[4].x = stlPolygon[4].y =  0.0;
    stlPolygon[1].x = 25.0; stlPolygon[1].y = 0.0;
    stlPolygon[2].x = 25.0; stlPolygon[2].y = 25.0;
    stlPolygon[3].x = 0.0; stlPolygon[3].y = 25.0;
    boost::geometry::append(polygon, stlPolygon);
    boost::geometry::buffer(polygon, off_polygon, 1);
    stlPolygon = off_polygon.outer();
    for (auto punto = stlPolygon.begin(); punto != stlPolygon.end(); punto++)
        std::cout << "(" << punto->x << ", " << punto->y << ")" << std::endl;

编译时出现以下错误：

'int boost::mpl::assertion_failed<false>(boost::mpl::assert<false>::type)': impossibile convertire l'argomento 1 da 'boost::mpl::failed ************(__thiscall boost::geometry::nyi::not_implemented_error<boost::geometry::info::POLYGON,boost::geometry::info::POLYGON,void>::THIS_OPERATION_IS_NOT_OR_NOT_YET_IMPLEMENTED::* ***********)(boost::mpl::assert_::types<Term1,Term2,Term3,boost::mpl::na>)' a 'boost::mpl::assert<false>::type'

我错过了什么？

编辑

我已通过以下方式更新了我的代码：

//////////////////////// DEFINITIONS
typedef BG::model::polygon<PNT_2D, false> BoostPolygon;
typedef BG::model::multi_polygon<BoostPolygon> BoostMultiPolygon;
typedef SB::distance_symmetric<double> DistanceStrategy;
typedef SB::end_round EndStrategy;
typedef SB::join_round JoinStrategy;
typedef SB::point_circle PointStrategy;
typedef SB::side_straight SideStrategy;
typedef std::vector<PNT_2D> StlPolygon;
/////////////////////////////////////////////////////////////

///////////////////////// CODE
BoostMultiPolygon   off_polygon;
BoostPolygon        polygon;
DistanceStrategy    distance_strategy(1.0);
EndStrategy     end_strategy;
JoinStrategy        join_strategy;
PointStrategy       point_strategy;
PNT_2D          p2dPunto;
SideStrategy        side_strategy;
StlPolygon      stlPolygon;

p2dPunto.x = p2dPunto.y = 0.0;
boost::geometry::append(polygon, p2dPunto);
p2dPunto.x = 25.0; p2dPunto.y = 0.0;
boost::geometry::append(polygon, p2dPunto);
p2dPunto.x = 25.0; p2dPunto.y = 25.0;
boost::geometry::append(polygon, p2dPunto);
p2dPunto.x = 0.0; p2dPunto.y = 25.0;
boost::geometry::append(polygon, p2dPunto);
p2dPunto.x = 0.0; p2dPunto.y = 0.0;
boost::geometry::append(polygon, p2dPunto);
boost::geometry::buffer(polygon, off_polygon, distance_strategy, side_strategy, join_strategy, end_strategy, point_strategy);
for (auto poligono = off_polygon.begin(); poligono != off_polygon.end(); poligono++)

    for (auto punto = poligono->outer().begin(); punto != poligono->outer().end(); punto++)
        std::cout << "(" << punto->x << ", " << punto->y << ")" << std::endl;

std::cin >> nStaph;

return EXIT_SUCCESS;

现在我遇到了这个错误：

'std::copy::_Unchecked_iterators::_Deprecate': Call to 'std::copy' with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'

Not in the main project, but in xutility.

【参考方案1】：

您提供的代码是缓冲一个盒子。对于带有多边形的缓冲区， 您（当前）需要使用带有策略的缓冲区（请参阅doc 有一个例子） 如果您这样做并提供策略，则结果应该是多面体 您的样本有效地使用了一个盒子，所以这可能是一个选项 也。但是你的输入几何应该满足盒子的概念

【讨论】：

您好，感谢您的回答，我已经用新代码和新错误更新了问题。

答案在消息中：“要禁用此警告，请使用 -D_SCL_SECURE_NO_WARNINGS”。

我猜的，其实我是这样解决的，但是心里不舒服，就是想知道有没有别的办法。