OgreVolumeOctreeNodeSplitPolicy.h

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/*
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#ifndef __Ogre_Volume_OctreeNodeSplitPolicy_H__
#define __Ogre_Volume_OctreeNodeSplitPolicy_H__

#include "OgreVector3.h"

#include "OgreVolumeSource.h"
#include "OgreVolumeOctreeNode.h"
#include "OgreVolumePrerequisites.h"

namespace Ogre {
namespace Volume {

    class OctreeNode;

    class _OgreVolumeExport OctreeNodeSplitPolicy
    {
    protected:

        const Source *mSrc;
        
        Real mMaxCellSize;
        
        inline Real interpolate(const Real f000, const Real f001, const Real f010, const Real f011,
            const Real f100, const Real f101, const Real f110, const Real f111, const Vector3 &position) const
        {
            Real oneMinX = (Real)1.0 - position.x;
            Real oneMinY = (Real)1.0 - position.y;
            Real oneMinZ = (Real)1.0 - position.z;
            Real oneMinXoneMinY = oneMinX * oneMinY;
            Real xOneMinY = position.x * oneMinY;
            return oneMinZ * (f000 * oneMinXoneMinY
                + f100 * xOneMinY
                + f010 * oneMinX * position.y)
                + position.z * (f001 * oneMinXoneMinY
                + f101 * xOneMinY
                + f011 * oneMinX * position.y)
                + position.x * position.y * (f110 * oneMinZ
                + f111 * position.z);
        }

    public:
        
        OctreeNodeSplitPolicy(const Source *src, const Real maxCellSize);
                
        bool doSplit(OctreeNode *node, const Real geometricError) const;
    };

}
}

#endif