OSGGraphicStatisticsForeground.inl

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//---------------------------------------------------------------------------
//  Includes
//---------------------------------------------------------------------------
#include <OSGConfig.h>

/* */

OSG_BEGIN_NAMESPACE inline void GraphicStatisticsForeground::processValue(Real32 &value,
                                                                          const UInt32 &elementID)
{
    processOnlyValue(value, elementID);
    addValueToHistory(value, elementID);
}

/* */
inline void GraphicStatisticsForeground::processOnlyValue(Real32 &value,
                                                          const UInt32 &elementID)
{
    UInt32  flags = getFlags()[elementID];
    Real32  minV = getMinValue()[elementID];
    Real32  maxV = getMaxValue()[elementID];

    /* check for invert */
    if(flags & OSG_RECIPROC)
    {
        value = 1.0f / value;
    }

    /* check for a to big Value */
    if(value > maxV)
    {
        if(flags & OSG_OVERFLOW_RESIZE)
        {
            getMaxValue()[elementID] = value;
        }
        else
        {
            value = maxV;
        }
    }

    /* check for to small values */
    if(value < minV)
    {
        if(flags & OSG_UNDERFLOW_RESIZE)
        {
            getMinValue()[elementID] = value;
        }
        else
        {
            value = minV;
        }
    }

    /* end of these checks */
}

/* */
inline void GraphicStatisticsForeground::addValueToHistory(Real32 &value,
                                                           const UInt32 &elementID)
{
    UInt32  flags = getFlags()[elementID];

    /* Smooth the value, if asked for */
    UInt32  hSize = _history.size();
    UInt32  size = (elementID < hSize) ? _history[elementID].size() : 0;

    if(size > 0)
    {
        UInt32  queueEnd = _historyID[elementID];
        _history[elementID][queueEnd] = value;

        /* increment the queue end */
        _historyID[elementID] = (_historyID[elementID] + 1) % size;

        /* check whether the value should be smoothed */
        if((flags & OSG_SMOOTH) ||
                   (flags & OSG_OVERFLOW_RESIZE) ||
                   (flags & OSG_UNDERFLOW_RESIZE))
        {
            Real32  v = 0.0, max = 0.0, min = 0.0, sum = 0.0;

            for(UInt32 i = 0; i < size; i++)
            {
                v = _history[elementID][i];

                if(i)
                {
                    if(v > max)
                        max = v;
                    else if(v < min)
                        min = v;
                }
                else
                    min = max = v;

                sum += v;
            }

            if(flags & OSG_SMOOTH)
            {
                value = sum / size;

                //_history[ID][queueEnd] = value;
            }

            if((flags & OSG_OVERFLOW_RESIZE) && (max < getMaxValue()[elementID]))
            {
                max += (getMaxValue()[elementID] - max) / 2.0f;
                getMaxValue()[elementID] = osgMax(v, max);
            }

            if((flags & OSG_UNDERFLOW_RESIZE) && (min > getMinValue()[elementID]))
            {
                min -= (min - getMinValue()[elementID]) / 2.0f;
                getMinValue()[elementID] = osgMin(v, min);
            }
        }
    }
}

OSG_END_NAMESPACE
#define OSGGRAPHICSTATISTICSFOREGROUND_INLINE_CVSID \
        "@(#)$Id: OSGGraphicStatisticsForeground.inl,v 1.2 2002/07/30 16:30:32 jbehr Exp $"

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