arraytesselator.h

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#ifndef arraytesselator_h
#define arraytesselator_h
                                                                                
/*+
________________________________________________________________________
(C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
Author:        Yuancheng Liu
Date:          April 2011
RCS:           $Id$
________________________________________________________________________

-*/

#include "geometrymod.h"
#include "arraynd.h"
#include "ranges.h"


template <class T> class Array2D;

namespace Geometry
{

mExpClass(Geometry) ArrayTesselator : public ParallelTask
{
public:
                        ArrayTesselator(const float* data,
                                        int datarowsize,int datacolsize,
                                        const StepInterval<int>& rrg,
                                        const StepInterval<int>& crg);

                        ArrayTesselator(const Array2D<float>& data,
                                        const StepInterval<int>& rrg,
                                        const StepInterval<int>& crg);

    od_int64            nrIterations() const    
                        { return (rowrange_.nrSteps()+1) * 
                                 (colrange_.nrSteps()+1); }
    
                        /*<s= 0 for points, 1 for lines, 2 for triangles.*/
    TypeSet<int>        getIndices(char s=2) const
                        { return s==2 ? stripcis_ : (s ? linecis_ : pointcis_);}
    virtual int         getCoordIndex(int row,int col ) { return 0; }
    const char*         message() const { return "Tesselating geometry"; }

protected:

    bool                        doWork(od_int64 start,od_int64 stop,int);

    int                         maxNrThreads() const    { return 1; }

    const float*                data_;
    int                         datarowsize_;
    int                         datacolsize_;
    const StepInterval<int>&    rowrange_;
    const StepInterval<int>&    colrange_;
   
    TypeSet<int>                pointcis_;
    TypeSet<int>                linecis_;
    TypeSet<int>                stripcis_;
};

}; // namespace
#endif