mirror of https://github.com/CGAL/cgal
99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
#include "numrep1.h"
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#include <CGAL/Plane_3.h>
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#include <CGAL/Line_3.h>
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#include <CGAL/intersection_3_1.h>
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#include "numrep2.h"
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using std::cout;
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using std::cin;
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typedef CGAL::Plane_3<TestR> Plane;
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typedef CGAL::Segment_3<TestR> Segment;
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typedef CGAL::Point_3<TestR> Point;
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typedef CGAL::Direction_3<TestR> Direction;
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bool read_data(Plane &pl, Segment &seg)
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{
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randomint ri;
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int a, b, c, d, w;
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cin >> a >> b >> c >> d;
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if (!cin)
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return false;
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w = ri.next();
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pl = Plane(a*w, b*w, c*w, d*w);
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cin >> a >> b >> c;
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if (!cin)
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return false;
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w = ri.next();
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Point p1(a*w, b*w, c*w, w);
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cin >> a >> b >> c;
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if (!cin)
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return false;
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w = ri.next();
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Point p2(a*w, b*w, c*w, w);
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seg = Segment(p1, p2);
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return true;
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}
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void write_point(const Point & 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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cout << xd <<' '<< yd <<' '<< zd << '\n';
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}
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/*
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void write_point(const Point & pt)
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{
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cout << CGAL::to_double(pt.x()) <<' '
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<< CGAL::to_double(pt.y()) <<' '
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<< CGAL::to_double(pt.z()) << '\n';
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}
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*/
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int main()
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{
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Plane pl;
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Point pt;
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Segment seg;
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CGAL::Object result;
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if (!read_data(pl, seg))
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return 1;
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result = CGAL::intersection(pl, seg);
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if (result.is_empty()) {
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if (CGAL::do_intersect(pl, seg)) {
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cout << "do_intersect is inconsistent with intersection result.\n";
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return 1;
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}
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cout << "No intersection.\n";
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return 0;
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}
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if (!CGAL::do_intersect(pl, seg)) {
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cout << "do_intersect is inconsistent with intersection result.\n";
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return 1;
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}
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if (CGAL::assign(pt, result)) {
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cout << "Point intersection.\n";
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write_point(pt);
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return 0;
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} else {
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if (CGAL::assign(seg, result)) {
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cout << "Segment intersection.\n";
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return 0;
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}
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}
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cout << "Unknown result.\n";
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return 1;
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}
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