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    const int sizeY() const { return mSizeY; }
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    const int sizeY() const { return mSizeY; }
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    const float metricSizeX() const { return mSizeX*mCellsize; }
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    const float metricSizeX() const { return mSizeX*mCellsize; }
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    const float metricSizeY() const { return mSizeY*mCellsize; }
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    const float metricSizeY() const { return mSizeY*mCellsize; }
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    const float cellsize() const { return mCellsize; }
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    const float cellsize() const { return mCellsize; }
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    // query
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    // query
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    T& valueAtIndex(const QPoint& pos); /// value at position defined by indices (x,y)
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    T& valueAt(const QPointF& posf); /// value at position defined by metric coordinates
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    T& valueAtIndex(const QPoint& pos); ///< value at position defined by indices (x,y)
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    T& valueAt(const QPointF& posf); ///< value at position defined by metric coordinates
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    QPoint indexAt(const QPointF& pos) { return QPoint(int((pos.x()-mOffset.x()) / mCellsize),  int((pos.y()-mOffset.y())/mCellsize)); } /// get index of value at position pos (metric)
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    QPoint indexAt(const QPointF& pos) { return QPoint(int((pos.x()-mOffset.x()) / mCellsize),  int((pos.y()-mOffset.y())/mCellsize)); } /// get index of value at position pos (metric)
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    bool isIndexValid(const QPoint& pos) { return (pos.x()>=0 && pos.x()<mSizeX && pos.y()>=0 && pos.y()<mSizeY); } /// get index of value at position pos (index)
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    bool isIndexValid(const QPoint& pos) { return (pos.x()>=0 && pos.x()<mSizeX && pos.y()>=0 && pos.y()<mSizeY); } /// get index of value at position pos (index)
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    void validate(QPoint &pos) { pos.setX( qMax(qMin(pos.x(), mSizeX-1), 0) );  pos.setY( qMax(qMin(pos.y(), mSizeY-1), 0) );} /// ensure that "pos" is a valid key. if out of range, pos is set to minimum/maximum values.
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    void validate(QPoint &pos) { pos.setX( qMax(qMin(pos.x(), mSizeX-1), 0) );  pos.setY( qMax(qMin(pos.y(), mSizeY-1), 0) );} /// ensure that "pos" is a valid key. if out of range, pos is set to minimum/maximum values.
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    QPointF getCellCoordinates(const QPoint &pos) { return QPointF( (pos.x()+0.5)*mCellsize+mOffset.x(), (pos.y()+0.5)*mCellsize + mOffset.y());} /// get metric coordinates of the cells center
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    QPointF getCellCoordinates(const QPoint &pos) { return QPointF( (pos.x()+0.5)*mCellsize+mOffset.x(), (pos.y()+0.5)*mCellsize + mOffset.y());} /// get metric coordinates of the cells center
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    inline  T* begin() { return mData; } /// get "iterator" pointer
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    inline  T* end() { return &(mData[mCount]); } /// get iterator end-pointer
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    inline  T* begin() { return mData; } ///< get "iterator" pointer
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    inline  T* end() { return &(mData[mCount]); } ///< get iterator end-pointer
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    QPoint indexOf(T* element); ///< retrieve index (x/y) of the pointer element. returns -1/-1 if element is not valid.
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private:


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private:


          

          

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    T* mData;


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    T* mData;


          

          

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    QPointF mOffset;


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    QPointF mOffset;


          

          

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    if (mOffset.y()+cellsize*dy<rect.bottom())


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    if (mOffset.y()+cellsize*dy<rect.bottom())


          

          

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        dy++;


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        dy++;


          

          

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    return setup(cellsize, dx, dy);


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    return setup(cellsize, dx, dy);


          

          

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}


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}


          

          

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template <class T>


          

          

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QPoint Grid<T>::indexOf(T* element)


          

          

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{


          

          

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    QPoint result(-1,-1);


          

          

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    if (element==NULL || element<mData || element>=end())


          

          

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        return result;


          

          

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    int idx = element - mData;


          

          

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    result.setX( idx / mSizeX);


          

          

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    result.setY( idx % mSizeX);


          

          

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    return result;


          

          

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}


          

          

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#endif // GRID_H


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#endif // GRID_H