Contours.h

//
// Contours.h
//
// Copyright (c) 2004-2009 Virtual Terrain Project
// Free for all uses, see license.txt for details.
//

#ifndef CONTOURSH
#define CONTOURSH

#if SUPPORT_QUIKGRID

#include "Terrain.h"
class SurfaceGrid;


class vtContourConverter
{
public:
    vtContourConverter();
    ~vtContourConverter();

    // There are two ways to use the converter:
    vtGeode *Setup(vtTerrain *pTerr, const RGBf &color, float fHeight);
    bool Setup(vtTerrain *pTerr, vtFeatureSetLineString *fset);

    void GenerateContour(float fAlt);
    void GenerateContours(float fAInterval);
    void Finish();
    void Coord(float x, float y, bool bStart);

protected:
    bool SetupTerrain(vtTerrain *pTerr);
    void Flush();

    SurfaceGrid *m_pGrid;

    vtTerrain *m_pTerrain;
    vtHeightFieldGrid3d *m_pHF;
    DRECT m_ext;
    DPoint2 m_spacing;
    float m_fAltitude;
    float m_fHeight;
    DLine2  m_line;

    // These are used if building geometry directly
    vtGeode *m_pGeode;
    vtGeomFactory *m_pMF;

    // This is used if building line features
    vtFeatureSetLineString *m_pLS;
};
  // utility

#endif // SUPPORT_QUIKGRID
#endif // CONTOURSH