DGtal::functors::StrictTruncationFunctor< Integer > Struct Template Reference

BinaryFunctor that computes the algebraic quotient i of a/b with any non zero fractional part discarded (truncation toward zero), and that returns i+1 (resp. i-1) if a is negative (resp. positive) if b divides a. Since we assume that a is not equal to 0, we have $|i| < |a/b|$. See also LargeTruncationFunctor. More...

#include <DGtal/geometry/curves/ArithmeticalDSSConvexHull.h>

Public Member Functions
Integer	operator() (const Integer &a, const Integer &b) const

Detailed Description

template<typename Integer>
struct DGtal::functors::StrictTruncationFunctor< Integer >

BinaryFunctor that computes the algebraic quotient i of a/b with any non zero fractional part discarded (truncation toward zero), and that returns i+1 (resp. i-1) if a is negative (resp. positive) if b divides a. Since we assume that a is not equal to 0, we have $|i| < |a/b|$. See also LargeTruncationFunctor.

Template Parameters

Integer

a model of integer used to store a and b

Definition at line 130 of file ArithmeticalDSSConvexHull.h.

Member Function Documentation

operator()()

template<typename Integer>

Integer DGtal::functors::StrictTruncationFunctor< Integer >::operator() ( const Integer & a, const Integer & b ) const

inline

Returns

quotient i defined above

Parameters

a

numerator

Precondition

a is not null

Parameters

b	denominator

Precondition

b is not null

Definition at line 142 of file ArithmeticalDSSConvexHull.h.

      {
        ASSERT( a != NumberTraits<Integer>::ZERO ); 
        ASSERT( b != NumberTraits<Integer>::ZERO );
 
        Integer i = a / b;
        if (a == i*b)
          {
            if (i >= NumberTraits<Integer>::ZERO) 
              --i; 
            else 
              ++i;
          }
        return i; 
      } 

References DGtal::NumberTraitsImpl< std::decay< T >::type >::ZERO.

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The documentation for this struct was generated from the following file:

• ArithmeticalDSSConvexHull.h