mirror of https://github.com/CGAL/cgal
37 lines
1.6 KiB
C++
37 lines
1.6 KiB
C++
///////////////// Definitions of several famous surfaces /////////////////
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double sphere_function (double, double, double); // (c=(0,0,0), r=1)
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double ellipsoid_function (double, double, double); // (c=(0,0,0), r=1)
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double torus_function (double, double, double); // (c=(0,0,0), r=2)
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double chair_function (double, double, double); // (c=(0,0,0), r=6)
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double tanglecube_function (double, double, double); // (c=(0,0,0), r=4)
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double octic_function (double, double, double); // (c=(0,0,0), r=2)
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double heart_function (double, double, double); // (c=(0,0,0), r=2)
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double klein_function (double, double, double); // (c=(0,0,0), r=4)
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double ring_function (double, double, double); // (c=(0,0,0), r=?)
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double false_knot_function (double, double, double); // (c=(0,0,0), r=1)
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double knot1_function (double, double, double); // (c=(0,0,0), r=4)
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double knot2_function (double, double, double); // (c=(0,0,0), r=4)
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double knot3_function (double, double, double); // (c=(0,0,0), r=4)
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double cube_function (double, double, double); // (c=(0,0,0), r=2)
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template <int Sq_radius>
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double sphere_function (double x, double y, double z) // (c=(0,0,0), r=Sq_radius)
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{
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double x2=x*x, y2=y*y, z2=z*z;
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return (x2+y2+z2)/Sq_radius - 1;
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}
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template <typename FT, typename P>
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class FT_to_point_function_wrapper : public std::unary_function<P, FT>
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{
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typedef FT (*Implicit_function)(FT, FT, FT);
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Implicit_function function;
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public:
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typedef P Point;
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FT_to_point_function_wrapper(Implicit_function f) : function(f) {}
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FT operator()(Point p) const { return function(p.x(), p.y(), p.z()); }
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};
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