Precision.h

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#pragma once
#include <qmath.h>
#include <limits> 
 
 
 
#define L_RES 1.e-6
#define A_RES 1.e-10
 
 
namespace Geom
{
class Precision
{
public:
    // Compare 2 points, samePoint etc, same as acsi: SPAresabs
    static constexpr double linear_Resolution() { return L_RES; }
    // minimal angle, parallel, same as acis: SPAresnor
    static constexpr double angle_Resolution() { return A_RES; }
 
    static constexpr double tolerance() { return L_RES; }
 
    static constexpr double confusion() { return L_RES; }
 
    static constexpr double angular() { return A_RES; }
 
 
 
    static constexpr double infinite() { return std::numeric_limits<double>::infinity(); }
 
    static constexpr double shape_infinite() { return 1E06; }
 
    // Note:
    // If you want to use the std::numeric_limits min/max feature,
    // you need to undefine the symbols named min and max first.
    // These macros probably come from the windows.h.
    // (tp) 20111213
 
    static constexpr double min_double()
    {
        //              return std::numeric_limits<double>::min();
        return DBL_MIN;
    }
 
    static constexpr double max_double()
    {
        //              return std::numeric_limits<double>::max();
        return DBL_MAX;
    }
 
    static constexpr double epsilon() { return std::numeric_limits<double>::epsilon(); }
 
    static constexpr double epsilon(double v)
    {
        if (v >= 0.0)
            return std::nextafter(v, max_double()) - v;
        else
            return v - std::nextafter(v, min_double());
    }
};
 
 
}  // namespace Geom