mirror of https://github.com/CGAL/cgal
75 lines
1.7 KiB
C++
75 lines
1.7 KiB
C++
/*
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* Line Line intersection.
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*/
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#include "numrep1.h"
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#include <CGAL/Object.h>
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#include <CGAL/Line_2.h>
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#include <CGAL/Point_2.h>
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#include <CGAL/Line_2_Line_2_intersection.h>
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#include "numrep2.h"
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typedef CGAL::Point_2< TestR > point_t;
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typedef CGAL::Line_2< TestR > line_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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// 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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std::cout.setf(std::ios::showpos, std::ios::showpos);
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std::cout << xd <<' '<< yd;
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std::cout.unsetf(std::ios::showpos);
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}
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void treat_intersection(const line_t &line1, const line_t &line2)
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{
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point_t pt1;
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line_t l;
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CGAL::Object result = CGAL::intersection(line1, line2);
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if (CGAL::assign(pt1, result)) {
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std::cout << "Point intersection.\n";
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print(pt1);
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std::cout<<'\n';
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}
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if (CGAL::assign(l, result)) {
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std::cout << "Line intersection.\n";
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}
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if (!CGAL::assign(l, result) && !CGAL::assign(pt1, result))
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std::cout << "No intersection.\n";
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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, w1, w2;
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std::cin >> x1 >> y1 >> x2 >> y2;
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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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point_t p1, p2;
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p1 = point_t(to_nt(w1*x1), to_nt(w1*y1), to_nt(w1));
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p2 = point_t(to_nt(w2*x2), to_nt(w2*y2), to_nt(w2));
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line_t line1(p1, p2);
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std::cin >> x1 >> y1 >> x2 >> y2;
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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));
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p2 = point_t(to_nt(w2*x2), to_nt(w2*y2), to_nt(w2));
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line_t line2(p1, p2);
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treat_intersection(line1, line2);
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return 0;
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}
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