Philipp Möller
394b8de4d9
Merge Min_circle_2, Min_ellipse_2, Min_sphere_d, Min_annulus_d, Min_sphere_of_spheres_d, Min_quadrilateral_2 and Approximate_min_ellipsoid_d. The documentation from the part that is in Matrix_search has also been moved here, but not the code. Add a new don't submit that covers the old ones, combine the package_info files. Examples and tests are still in separate folders. Merge them in a separate step.
57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
// computes the smallest enclosing annulus of two point
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// sets on nested squares in R^2, using double
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// as input type and some internal EXACT floating point type
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#include <iostream>
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#include <cassert>
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#include <CGAL/Homogeneous.h>
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#include <CGAL/Min_annulus_d.h>
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#include <CGAL/Min_sphere_annulus_d_traits_2.h>
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#ifdef CGAL_USE_GMP
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#include <CGAL/Gmpzf.h>
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typedef CGAL::Gmpzf ET;
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#else
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#include <CGAL/MP_Float.h>
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typedef CGAL::MP_Float ET;
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#endif
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// use an EXACT kernel...
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typedef CGAL::Homogeneous<ET> K;
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typedef K::Point_2 Point;
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// ...and the traits class based on the exact kernel
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typedef CGAL::Min_sphere_annulus_d_traits_2<K> Traits;
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typedef CGAL::Min_annulus_d<Traits> Min_annulus;
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int main()
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{
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// points on the squares [-1,1]^2 and [-2,2]^2
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Point P[8] = { Point(-1,-1), Point(-1,1), Point(1,-1), Point(1,1),
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Point(-2,-2), Point(-2,2), Point(2,-2), Point(2,2)};
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Min_annulus ma(P, P+8);
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assert (ma.is_valid());
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// get center of annulus
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Min_annulus::Coordinate_iterator coord_it;
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std::cout << "center:"; // homogeneous point, (0,0,1)
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for (coord_it = ma.center_coordinates_begin();
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coord_it != ma.center_coordinates_end();
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++coord_it)
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std::cout << " " << *coord_it;
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std::cout << std::endl;
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// get inner squared radius, 1^2+1^2 = 2
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std::cout << "Inner squared radius: " <<
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CGAL::to_double(ma.squared_inner_radius_numerator()) /
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CGAL::to_double(ma.squared_radii_denominator()) << std::endl;
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// get outer squared radius, 2^2+2^2 = 8
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std::cout << "Outer squared radius: " <<
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CGAL::to_double(ma.squared_outer_radius_numerator()) /
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CGAL::to_double(ma.squared_radii_denominator()) << std::endl;
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return 0;
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}
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