Boost 增强几何体:尚未实现线段相交?
我正在尝试一个简单的测试:用Boost几何体计算两段的交点。它不编译。我还尝试了一些变体(int点代替浮点,2D代替3D),但没有任何改进 boost真的有可能不实现线段相交吗?或者我做错了什么?错过一些水电站算法“相交”和“相交”之间的混淆? 代码非常基本:Boost 增强几何体:尚未实现线段相交?,boost,intersection,boost-geometry,Boost,Intersection,Boost Geometry,我正在尝试一个简单的测试:用Boost几何体计算两段的交点。它不编译。我还尝试了一些变体(int点代替浮点,2D代替3D),但没有任何改进 boost真的有可能不实现线段相交吗?或者我做错了什么?错过一些水电站算法“相交”和“相交”之间的混淆? 代码非常基本: #include <boost/geometry.hpp> #include <boost/geometry/geometries/point.hpp> #include <boost/geometry/ge
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/point.hpp>
#include <boost/geometry/geometries/segment.hpp>
#include <boost/geometry/algorithms/intersection.hpp>
typedef boost::geometry::model::point<float, 3, boost::geometry::cs::cartesian> testPoint;
typedef boost::geometry::model::segment<testPoint> testSegment;
testSegment s1(
testPoint(-1.f, 0.f, 0.f),
testPoint(1.f, 0.f, 0.f)
);
testSegment s2(
testPoint(0.f, -1.f, 0.f),
testPoint(0.f, 1.f, 0.f)
);
std::vector<testPoint> output;
bool intersectionExists = boost::geometry::intersects(s1, s2, output);
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typedef boost::geometry::model::point testPoint;
typedef boost::geometry::model::segment testSegment;
测试段s1(
测试点(-1.f,0.f,0.f),
测试点(1.f、0.f、0.f)
);
测试段s2(
测试点(0.f,-1.f,0.f),
测试点(0.f、1.f、0.f)
);
std::矢量输出;
bool intersectionExists=boost::geometry::intersects(s1,s2,输出);
但我在编译时通过Visual Studio发现以下错误:
- Error C2039 'apply' n'est pas membre de 'boost::geometry::dispatch::disjoint<Geometry1,Geometry2,3,boost::geometry::segment_tag,boost::geometry::segment_tag,false>' CDCadwork C:\Program Files\Boost\boost_1_75_0\boost\geometry\algorithms\detail\disjoint\interface.hpp 54
- Error C2338 This operation is not or not yet implemented. CDCadwork C:\Program Files\Boost\boost_1_75_0\boost\geometry\algorithms\not_implemented.hpp 47
-错误C2039'apply'n'est pas membre de'boost::geometry::dispatch::disjoint'CDCadwork C:\Program Files\boost\boost\u 1\u 75\u 0\boost\geometry\algorithms\detail\disjoint\interface.hpp 54
-错误C2338此操作未执行或尚未执行。CDCadwork C:\Program Files\Boost\Boost\u 1\u 75\u 0\Boost\geometry\algorithms\not\u implemented.hpp 47
确实存在两个问题:
intersects
(它实际上只返回您选择的名称intersectionExists
建议的真/假值)。在存在第三个参数的情况下,它将被用作一种策略-一个输出
显然不满足的概念
注意intersection
始终返回true:-尽管这不是文档化接口的一部分
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/point.hpp>
#include <boost/geometry/geometries/segment.hpp>
#include <iostream>
namespace bg = boost::geometry;
namespace bgm = bg::model;
using Point = bgm::point<float, 2, bg::cs::cartesian>;
using Segment = bgm::segment<Point>;
int main() {
Segment s1{{-1, 0}, {1, 0}};
Segment s2{{0, -1}, {0, 1}};
bool exists = bg::intersects(s1, s2);
std::vector<Point> output;
/*bool alwaysTrue = */ bg::intersection(s1, s2, output);
std::cout << bg::wkt(s1) << "\n";
std::cout << bg::wkt(s2) << "\n";
for (auto& p : output) {
std::cout << bg::wkt(p) << "\n";
}
return exists? 0:1;
}
LINESTRING(-1 0,1 0)
LINESTRING(0 -1,0 1)
POINT(0 0)