mirror of https://github.com/CGAL/cgal
82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
/*
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* 2D Iso_rectangle Segment intersection.
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*/
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#include "numrep1.h"
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#include <iostream>
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#include <CGAL/Object.h>
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#include <CGAL/Iso_cuboid_3.h>
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#include <CGAL/intersection_3_1.h>
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#include "numrep2.h"
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typedef CGAL::Point_3<TestR> point_t;
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typedef CGAL::Segment_3<TestR> segment_t;
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typedef CGAL::Iso_cuboid_3< TestR > rect_t;
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void print(const point_t &pt)
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{
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double xd = CGAL::to_double(pt.x());
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double yd = CGAL::to_double(pt.y());
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double zd = CGAL::to_double(pt.z());
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// force 0 to be positive zero.
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if (xd == 0.0)
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xd = 0.0;
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if (yd == 0.0)
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yd = 0.0;
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if (zd == 0.0)
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zd = 0.0;
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std::cout.setf(std::ios::showpos, std::ios::showpos);
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std::cout << xd <<' '<< yd <<' '<< zd;
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std::cout.unsetf(std::ios::showpos);
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}
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void one_pair(segment_t const & seg, rect_t const & rect)
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{
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segment_t iseg;
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point_t point;
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CGAL::Object result = CGAL::intersection(seg, rect);
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if (CGAL::assign(point, result)) {
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std::cout << "Point intersection.\n";
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print(point);
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std::cout << '\n';
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}
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if (CGAL::assign(iseg, result)) {
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std::cout << "Segment intersection.\n";
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print(iseg.source());
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std::cout << " ";
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print(iseg.target());
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std::cout << '\n';
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}
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if (!CGAL::assign(point, result) && !CGAL::assign(iseg, result)) {
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std::cout << "No intersection.\n";
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}
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}
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int main()
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{
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randomint ri;
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int x1, x2, y1, y2, z1, z2, w1, w2;
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std::cin >> x1 >> y1 >> z1 >> x2 >> y2 >> z2;
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if (!std::cin)
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return 1;
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point_t p1, p2;
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w1 = ri.next();
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w2 = ri.next();
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p1 = point_t(to_nt(w1*x1), to_nt(w1*y1), to_nt(w1*z1), to_nt(w1));
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p2 = point_t(to_nt(w2*x2), to_nt(w2*y2), to_nt(w2*z2), to_nt(w2));
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segment_t seg(p1, p2);
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std::cin >> x1 >> y1 >> z1 >> x2 >> y2 >> z2;
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if (!std::cin)
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return 1;
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w1 = ri.next();
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w2 = ri.next();
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p1 = point_t(to_nt(w1*x1), to_nt(w1*y1), to_nt(w1*z1), to_nt(w1));
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p2 = point_t(to_nt(w2*x2), to_nt(w2*y2), to_nt(w2*z2), to_nt(w2));
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rect_t rect(p1, p2);
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one_pair(seg, rect);
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return 0;
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}
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