DRange.h

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//                   OpenMS -- Open-Source Mass Spectrometry
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// $Maintainer: Stephan Aiche$
// $Authors: Marc Sturm $
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#ifndef OPENMS_DATASTRUCTURES_DRANGE_H
#define OPENMS_DATASTRUCTURES_DRANGE_H

#include <OpenMS/DATASTRUCTURES/DIntervalBase.h>

namespace OpenMS
{
  template <UInt D>
  class DRange :
    public Internal::DIntervalBase<D>
  {
public:


    enum {DIMENSION = D};
    typedef Internal::DIntervalBase<D> Base;
    typedef typename Base::PositionType PositionType;
    typedef typename Base::CoordinateType CoordinateType;
    enum DRangeIntersection
    {
      Disjoint,         
      Intersects,       
      Inside            
    };


    using Base::min_;
    using Base::max_;

    DRange() :
      Base()
    {
    }

    DRange(const PositionType & lower, const PositionType & upper) :
      Base(lower, upper)
    {
    }

    DRange(const DRange & range) :
      Base(range)
    {
    }

    DRange(const Base & range) :
      Base(range)
    {
    }

    DRange(CoordinateType minx, CoordinateType miny, CoordinateType maxx, CoordinateType maxy)
    {
      OPENMS_PRECONDITION(D == 2, "DRange<D>:DRange(minx, miny, maxx, maxy): index overflow!");
      min_[0] = minx;
      min_[1] = miny;
      max_[0] = maxx;
      max_[1] = maxy;
    }

    DRange & operator=(const DRange & rhs)
    {
      Base::operator=(rhs);
      return *this;
    }

    DRange & operator=(const Base & rhs)
    {
      Base::operator=(rhs);
      return *this;
    }

    ~DRange()
    {
    }



    bool operator==(const DRange & rhs) const
    {
      return Base::operator==(rhs);
    }

    bool operator==(const Base & rhs) const
    {
      return Base::operator==(rhs);
    }

    bool encloses(const PositionType & position) const
    {
      for (UInt i = 0; i != D; i++)
      {
        if (position[i] < min_[i]) return false;

        if (position[i] >= max_[i]) return false;
      }
      return true;
    }

    bool encloses(CoordinateType x, CoordinateType y) const
    {
      if (x < min_[0]) return false;

      if (x >= max_[0]) return false;

      if (y < min_[1]) return false;

      if (y >= max_[1]) return false;

      return true;
    }

    DRange united(const DRange<D> & other_range) const
    {
      PositionType united_min;
      PositionType united_max;
      DRange<D> united_range = DRange<D>::empty;

      PositionType other_min = other_range.minPosition();
      PositionType other_max = other_range.maxPosition();

      for (Size i = 0; i != D; ++i)
      {
        united_min[i] = min_[i] < other_min[i] ? min_[i] : other_min[i];
        united_max[i] = max_[i] > other_max[i] ? max_[i] : other_max[i];
      }
      united_range.setMinMax(united_min, united_max);

      return united_range;
    }

    DRangeIntersection intersects(const DRange & range) const
    {
      //check if r.min_ is in this area
      if (encloses(range.min_))
      {
        //check if r.max_ in this area => Inside / Intersects
        for (Size i = 0; i != D; i++)
        {
          if (range.max_[i] > max_[i])
          {
            return Intersects;
          }
        }
        return Inside;
      }
      // => r.min_ is not inside this area
      //check if any r.min_ >= max_ => Disjoint
      for (Size i = 0; i != D; i++)
      {
        if (range.min_[i] >= max_[i])
        {
          return Disjoint;
        }
      }
      // => some coordinate of r.min_ has to be smaller than the one of min_
      //check if all coords of r are smaller than the those of the range
      for (Size i = 0; i != D; i++)
      {
        if (range.max_[i] <= min_[i])
        {
          return Disjoint;
        }
      }
      return Intersects;
    }

    bool isIntersected(const DRange & range) const
    {
      //check if r.min_ is in this area
      if (encloses(range.min_))
      {
        return true;
      }

      // => r.min_ is not inside this area
      //check if any r.min_ >= max_ => Disjoint
      for (Size i = 0; i != D; i++)
      {
        if (range.min_[i] >= max_[i])
        {
          return false;
        }
      }
      // => some coordinate of r.min_ has to be smaller than the one of min_
      //check if all coords of r are smaller than the those of the range
      for (Size i = 0; i != D; i++)
      {
        if (range.max_[i] <= min_[i])
        {
          return false;
        }
      }
      return true;
    }

    bool isEmpty() const
    {
      for (UInt i = 0; i != D; i++)
      {
        if (max_[i] <= min_[i])
        {
          return true;
        }
      }
      return false;
    }

  };

  template <UInt D>
  std::ostream & operator<<(std::ostream & os, const DRange<D> & area)
  {
    os << "--DRANGE BEGIN--" << std::endl;
    os << "MIN --> " << area.min_ << std::endl;
    os << "MAX --> " << area.max_ << std::endl;
    os << "--DRANGE END--" << std::endl;
    return os;
  }

} // namespace OpenMS

#endif // OPENMS_DATASTRUCTURES_DRANGE_H