cgal 线面相交，线线相交

简介

快速用库的方式得到交点

参考链接

https://blog.csdn.net/OOFFrankDura/article/details/82430434

code

//山东大学 计算机基地Frankdura
//2018.9.4
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/intersections.h>
typedef CGAL::Exact_predicates_exact_constructions_kernel K;
typedef K::Point_3 Point_3;
typedef K::Segment_3 Segment_3;
typedef K::Plane_3 Plane_3;
typedef K::Intersect_3 Intersect_3;
int main()
{
    Segment_3 seg(Point_3(0,0,0), Point_3(2,2,0));
    Segment_3 lin(Point_3(1,2,0), Point_3(1,0,0));

    CGAL::cpp11::result_of<Intersect_3(Segment_3, Segment_3)>::type
            result = intersection(seg, lin);
        if (result) {
        if (const Segment_3* s = boost::get<Segment_3>(&*result)) {
            std::cout << *s << std::endl;
        } else {
            const Point_3* p = boost::get<Point_3 >(&*result);
            std::cout << (*p) << std::endl;
        }
    }
    return 0;
}

#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/intersections.h>
typedef CGAL::Exact_predicates_exact_constructions_kernel K;
typedef K::Point_3 Point_3;
typedef K::Segment_3 Segment_3;
typedef K::Plane_3 Plane_3;
typedef K::Intersect_3 Intersect_3;
int main()
{
    Segment_3 seg(Point_3(0,0,0), Point_3(4,4,4));
    Plane_3 lin (Point_3(1,0,0),Point_3(0,1,0),Point_3(0,0,1));
    CGAL::cpp11::result_of<Intersect_3(Segment_3, Segment_3)>::type
            result = intersection(seg, lin);
        if (result) {
        if (const Segment_3* s = boost::get<Segment_3>(&*result)) {
            std::cout << *s << std::endl;
        } else {
            const Point_3* p = boost::get<Point_3 >(&*result);
            std::cout << (*p) << std::endl;
        }
    }
    return 0;
}

附赠Makefile

LOCAL_LIBRARY +=  -L/home/ling/lee/lib/cgal/dyna
LOCAL_LDFLAGS += -lm -lpthread -ldl -lCGAL_Core -lCGAL_ImageIO -lCGAL -lgmp -lmpfr
LOCAL_CFLAGS += -I/home/ling/lee/include
CC := g++ -g -std=c++17
TARGETS1 = genCube2
SRCS1 = main2.cc
OBJS1 = $(patsubst %.cc, %.o, $(SRCS1))

CFLAGS += $(LOCAL_CFLAGS)
LDFLAGS += $(LOCAL_LIBRARY) $(LOCAL_LDFLAGS)

$(info $(OBJS))
$(info $(TARGETS))

all: $(TARGETS1)

$(TARGETS1):$(OBJS1)
	$(CC)  -o $@ $^  $(LDFLAGS) $(CFLAGS)

$(OBJS1): %.o:%.cc
	$(CC) -c $< -o $@ $(CFLAGS)

clean :
	@rm -rf $(TARGETS1) $(OBJS1)

#.SUFFIXES:
.PHONY : all clean