explpolygonsurface.h

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#pragma once

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        Yuancheng Liu
 Date:          July 2008
________________________________________________________________________

-*/

#include "geometrymod.h"
#include "indexedshape.h"
#include "coord.h"

class DAGTetrahedraTree;

namespace Geometry
{

class PolygonSurface;

mExpClass(Geometry) ExplPolygonSurface : public Geometry::IndexedShape
                                       , public CallBacker
{
public:
                        ExplPolygonSurface(const PolygonSurface*,
                                           float zscale=1);
                        ~ExplPolygonSurface();

    void                display(bool polygons,bool body);
    void                setPolygonSurface(const PolygonSurface*);
    const PolygonSurface* getPolygonSurface() const     { return surface_; }

    void                setZScale(float);

    bool                arePolygonsDisplayed() const { return displaypolygons_;}
    bool                isBodyDisplayed() const      { return displaybody_; }

    bool                needsUpdate() const          { return needsupdate_; }
    DAGTetrahedraTree*  getTetrahedraTree() const    { return tetrahedratree_; }

    TypeSet<Coord3>     getSurfaceSamples() const    { return samples_; }
    TypeSet<int>        getSampleIndices() const     { return sampleindices_; }
                        /*<The indices are corresponding to the samples_. */
    
    bool                prepareBodyDAGTree();
                        /*<Create body tetrahedras based on surface polygons.*/
    char                positionToBody(const Coord3 point);
                        /*<Check point is inside, on, or outside a triangulated 
                           body surface, ret 1, 0, -1 respectively. */

    bool                createsNormals() const       { return true; }
    
    bool                update(bool forceall,TaskRunner*);

protected:

    void                updateGeometries();
    bool                updateBodyDisplay();
    void                removeAll(bool);
    void                addToGeometries(IndexedGeometry*);
    void                removeFromGeometries(const IndexedGeometry*);
    void                addToTrianglePrimitiveSet(Geometry::PrimitiveSet*,
                                                  int,int,int);
    void                calcNormals(int nrtriangles,int idx1,int idx2,int idx3);



    bool                displaypolygons_;
    bool                displaybody_;
    bool                needsupdate_;
    Coord3              scalefacs_;

    DAGTetrahedraTree*          tetrahedratree_; 
    TypeSet<Coord3>             samples_;
    TypeSet<int>                sampleindices_;
    const PolygonSurface*       surface_;
    IndexedGeometry*            bodytriangle_;
    IndexedGeometry*            polygondisplay_;
};

};