PickEngines.h

//
// PickEngines.h
//
// Copyright (c) 2001-2011 Virtual Terrain Project
// Free for all uses, see license.txt for details.
//

#pragma once

class TerrainPicker : public vtLastMouse
{
public:
    TerrainPicker();
    void Eval();
    void SetHeightField(vtHeightField3d *pHeight) { m_pHeightField = pHeight; }

    bool GetCurrentPoint(FPoint3 &p);
    bool GetCurrentEarthPos(DPoint3 &p);

    void OnMouse(vtMouseEvent &event);

protected:
    void FindGroundPoint();

    FPoint3         m_GroundPoint;
    vtHeightField3d *m_pHeightField;
    DPoint3         m_EarthPos;
    bool            m_bOnTerrain;
};


class vtIcoGlobe;

class GlobePicker : public vtLastMouse
{
public:
    GlobePicker();
    void Eval();
    void SetRadius(double fRadius) { m_fRadius = fRadius; }
    void SetGlobe(vtIcoGlobe *pGlobe) { m_pGlobe = pGlobe; }
    void SetTargetScale(float s) { m_fTargetScale = s; }

    bool GetCurrentPoint(FPoint3 &p);
    bool GetCurrentEarthPos(DPoint3 &p);

protected:
    FPoint3     m_GroundPoint;
    DPoint3     m_EarthPos;
    bool        m_bOnTerrain;
    double      m_fRadius;
    vtIcoGlobe  *m_pGlobe;
    float       m_fTargetScale;
};