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HxNgbLWshed2d.h

/*
 *  Copyright (c) 2002, University of Amsterdam, The Netherlands.
 *  All rights reserved.
 *
 *
 *  Author(s):
 *  Leon Todoran            (todoran@science.uva.nl)
 */

#ifndef HxNgbLWshed2d_h
#define HxNgbLWshed2d_h

#include "HxClassName.h"
#include "HxSizes.h"
#include "HxCategories.h"
#include "HxTagList.h"
//#include "HxSampleFunTem.h"


template <class ArgType, class ResType>
class HxNgbLWshed2d 
{
public:

    typedef HxTagLoop           IteratorCategory;

    typedef HxTag1Phase         PhaseCategory;


                            //HxNgbLWshed2d();

                            HxNgbLWshed2d(HxTagList& tags);

                            ~HxNgbLWshed2d();

    HxSizes                 size();

    void                    init(int, int, ArgType);

    void                    next(int x, int y, ArgType value);

    ResType                 result() const;

    static HxString         className();

private:
    int                     _pctIdx;
    int                     _size;  //this is 3
    int                     _conn;  //connectivity 4 or 8
    int                     _wshedval;

    ArgType*                 _values;
    int                     _i;
};

template <class ArgType, class ResType>
ostream&
operator<<(ostream& os, const HxNgbLWshed2d<ArgType, ResType>& pct)
{
    return pct.put(os);
}

template <class ArgType, class ResType>
inline HxString
HxNgbLWshed2d<ArgType, ResType>::className()
{
    static HxString s("lwshed");
    return s;
}

template <class ArgType, class ResType>
inline void
HxNgbLWshed2d<ArgType, ResType>::init(int, int, ArgType)
{
    _i = 0;
}

template <class ArgType, class ResType>
inline void
HxNgbLWshed2d<ArgType, ResType>::next(int, int, ArgType value)
{
    _values[_i++] = value;
}

template <class ArgType, class ResType>
inline HxSizes
HxNgbLWshed2d<ArgType, ResType>::size()
{
//    return HxSizes(_size, _size, 1);
    return HxSizes(3, 3, 1);
}

template <class ArgType, class ResType>
inline ResType
HxNgbLWshed2d<ArgType, ResType>::result() const
{
    ArgType minval=_values[_pctIdx];
    if(_conn==4)
    {
        if( _values[1] < minval && _values[1]>_wshedval)
            minval = _values[1];
        if( _values[3] < minval && _values[3]>_wshedval)
            minval = _values[3];
        if( _values[5] < minval && _values[5]>_wshedval)
            minval = _values[5];
        if( _values[7] < minval && _values[7]>_wshedval)
            minval = _values[7];

        if(minval<_values[_pctIdx])
            return _wshedval;
        else
            return _values[_pctIdx];
    }
    if(_conn==8)
    {
        if( _values[0] < minval && _values[0]>_wshedval)
            minval = _values[0];
        if( _values[1] < minval && _values[1]>_wshedval)
            minval = _values[1];
        if( _values[2] < minval && _values[2]>_wshedval)
            minval = _values[2];
        if( _values[3] < minval && _values[3]>_wshedval)
            minval = _values[3];
        if( _values[5] < minval && _values[5]>_wshedval)
            minval = _values[5];
        if( _values[6] < minval && _values[6]>_wshedval)
            minval = _values[6];
        if( _values[7] < minval && _values[7]>_wshedval)
            minval = _values[7];
        if( _values[8] < minval && _values[8]>_wshedval)
            minval = _values[8];

        if(minval>_wshedval && minval<_values[_pctIdx])
            return _wshedval;
        else
            return _values[_pctIdx];
    }

    return _values[_pctIdx];
}


#ifdef INC_TEMPLATE_SRC
#include "HxNgbLWshed2d.c"
#endif


#endif

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