OgreVolumeIsoSurfaceMC.h

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/*
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(Object-oriented Graphics Rendering Engine)
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*/
#ifndef __Ogre_Volume_IsoSurfaceMC_H__
#define __Ogre_Volume_IsoSurfaceMC_H__

#include "OgreVolumeIsoSurface.h"

namespace Ogre {
namespace Volume {

    class _OgreVolumeExport IsoSurfaceMC : public IsoSurface
    {
    protected:
        

        inline Vector3 interpolate(const Vector3 &v0, const Vector3 &v1, const Vector4 &val0, const Vector4 &val1, Vector3 &normal) const
        {
            // Don't use Math::RealEqual here as it isn't inlined and this function is performance critical.
            if (fabs(val0.w - ISO_LEVEL) <= FLT_EPSILON)
            {
                normal.x = val0.x;
                normal.y = val0.y;
                normal.z = val0.z;
                return v0;
            }
            if (fabs(val1.w - ISO_LEVEL) <= FLT_EPSILON)
            {
                normal.x = val1.x;
                normal.y = val1.y;
                normal.z = val1.z;
                return v1;
            }
            if (fabs(val1.w - val0.w) <= FLT_EPSILON)
            {
                normal.x = val0.x;
                normal.y = val0.y;
                normal.z = val0.z;
                return v0;
            }
            Real mu = (ISO_LEVEL - val0.w) / (val1.w - val0.w);
            Vector4 normal4 = val0 + mu * (val1 - val0);
            normal.x = normal4.x;
            normal.y = normal4.y;
            normal.z = normal4.z;
            normal.normalise();
            return v0 + mu * (v1 - v0);
        }

    public:

        explicit IsoSurfaceMC(const Source *src);
        
        virtual void addMarchingCubesTriangles(const Vector3 *corners, const Vector4 *volumeValues, MeshBuilder *mb) const;
        
        virtual void addMarchingSquaresTriangles(const Vector3 *corners, const Vector4 *volumeValues, const size_t *indices, const Real maxDistance, MeshBuilder *mb) const;
    };
}
}

#endif