explicitmarchingcubes.h

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#pragma once

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        K. Tingdahl
 Date:          March 2006
________________________________________________________________________

-*/

#include "geometrymod.h"
#include "indexedshape.h"
#include "multidimstorage.h"
#include "thread.h"

class MarchingCubesSurface;
template <class T> class SamplingData;
class TaskRunner;

mExpClass(Geometry) ExplicitMarchingCubesSurface : public CallBacker,
                                                   public Geometry::IndexedShape
{
public:
                        ExplicitMarchingCubesSurface(MarchingCubesSurface*);
                        ~ExplicitMarchingCubesSurface();

    void                        setSurface(MarchingCubesSurface*);
    MarchingCubesSurface*       getSurface() { return surface_; }
    const MarchingCubesSurface* getSurface() const { return surface_; }
    void                        removeAll(bool deep);

    bool                        update(bool forceall,TaskRunner* = 0);
    bool                        needsUpdate() const;

    bool                        createsNormals() const { return true; }

protected:

    friend              class ExplicitMarchingCubesSurfaceUpdater;
    void                surfaceChange(CallBacker*);

    bool                allBucketsHaveChanged() const;

    bool                update(const Interval<int>& xrg,
                               const Interval<int>& yrg,
                               const Interval<int>& zrg,TaskRunner* = 0);
    void                removeBuckets(const Interval<int>& xrg,
                                      const Interval<int>& yrg,
                                      const Interval<int>& zrg);
    bool                updateIndices(const int* pos);
    bool                getCoordIndices(const int* pos,int* res);
    bool                updateCoordinates(const int* pos);
    bool                updateCoordinate(const int* pos,const int* idxs,
                                         int*res);
    int                 getBucketPos(int pos) const;

    MarchingCubesSurface*       surface_;

    Interval<int>*              changedbucketranges_[3];
    int                         lastversionupdate_;

    MultiDimStorage<int>        coordindices_;
    Threads::Lock               coordindiceslock_;

    MultiDimStorage<Geometry::IndexedGeometry*> ibuckets_;
};

mExpClass(Geometry) MarchingCubeTriangleTable
{
public:
    ObjectSet<char>             indices_;
    TypeSet<unsigned char>      nrindices_;
};


mExpClass(Geometry) MarchingCubeLookupTable
{
public:
                                MarchingCubeLookupTable();
                                ~MarchingCubeLookupTable();
    MarchingCubeTriangleTable   triangles_[256];

    static const MarchingCubeLookupTable& get();
};