QuikGrid.h

//
// QuikGrid.h
//
// This code provides an interface to the QuikGrid LGPL library
//  (http://www.perspectiveedge.com/source.html)
//
// In particular, it solves the problem that QuikGrid can only link to
//  a single callback function for contour output.
//
// Copyright (c) 2007-2011 Virtual Terrain Project
// Free for all uses, see license.txt for details.
//

#pragma once

#if SUPPORT_QUIKGRID

// QuikGrid headers
#include "surfgrid.h"
#include "contour.h"

#include "HeightField.h"
#include "Features.h"

typedef void (*ContourCallback)(void *context, float x, float y, bool bStart);

void SetQuikGridCallbackFunction(ContourCallback fn, void *context);

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

    bool Setup(vtHeightFieldGrid3d *pHGGrid, vtFeatureSetLineString *fset);

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

protected:
    bool SetupGrid(vtHeightFieldGrid3d *pHGGrid);
    void Flush();

    class SurfaceGrid *m_pGrid;

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

    vtFeatureSetLineString *m_pLS;
};

#endif // SUPPORT_QUIKGRID