AbstractLayer.h

//
// AbstractLayer.h
//
// Copyright (c) 2006-2011 Virtual Terrain Project
// Free for all uses, see license.txt for details.
//

#ifndef ABSTRACTLAYERH
#define ABSTRACTLAYERH

#include "TerrainLayers.h"
#include "vtdata/Features.h"

class vtTerrain;

class vtVisual
{
public:
    vtVisual() : m_xform(NULL) {}
    std::vector<vtMesh*> m_meshes;
    vtTransform *m_xform;
};

typedef std::map<vtFeature*,vtVisual*> VizMap;

class vtAbstractLayer : public vtLayer
{
public:
    vtAbstractLayer(vtTerrain *pTerr);
    ~vtAbstractLayer();

    void SetLayerName(const vtString &fname);
    vtString GetLayerName();
    void SetVisible(bool vis);
    bool GetVisible();

    void SetFeatureSet(vtFeatureSet *pSet);
    vtFeatureSet *GetFeatureSet() const { return pSet; }
    vtGroup *GetLabelGroup() const { return pLabelGroup; }
    vtGroup *GetContainer() const { return pContainer; }
    vtVisual *GetViz(vtFeature *feat);
    vtMultiTexture *GetMultiTexture() const { return pMultiTexture; }
    void CreateContainer();

    // Create for all features
    void CreateStyledFeatures();
    bool CreateTextureOverlay();
    void CreateLineGeometryForPoints();

    // Create for a single feature
    void CreateStyledFeature(int iIndex);
    void CreateObjectGeometry(uint iIndex);
    void CreateLineGeometry(uint iIndex);
    void CreateFeatureLabel(uint iIndex);

    void ReleaseGeometry();
    void ReleaseFeatureGeometry(vtFeature *f);

    // When the underlying feature changes, we need to rebuild the visual
    void Rebuild();
    void RebuildFeature(uint iIndex);
    void UpdateVisualSelection();
    void Reload();

    // To make sure all edits are fully reflected in the visual, call these
    //  methods around any editing of style or geometry.
    void EditBegin();
    void EditEnd();
    void DeleteFeature(vtFeature *f);

    void SetProperties(const vtTagArray &props) { m_StyleProps = props; }
    vtTagArray &GetProperties() { return m_StyleProps; }

protected:
    void CreateGeomGroup();
    void CreateLabelGroup();
    int GetObjectMaterialIndex(vtTagArray &style, uint iIndex);

    // A set of properties that can provide additional information, such as
    //  style information for visual display.
    vtTagArray  m_StyleProps;

    vtTerrain *m_pTerr;

    vtFeatureSet *pSet;
    vtGroupPtr pContainer;
    vtGroup *pGeomGroup;
    vtGroup *pLabelGroup;
    vtMultiTexture *pMultiTexture;

    // Handy pointers to disambiguate pSet
    vtFeatureSetPoint2D *pSetP2;
    vtFeatureSetPoint3D *pSetP3;
    vtFeatureSetLineString   *pSetLS2;
    vtFeatureSetLineString3D *pSetLS3;
    vtFeatureSetPolygon *pSetPoly;

    // Used to create the visual features
    vtFontPtr m_pFont;
    vtMaterialArrayPtr pGeomMats;

    int material_index_object;
    int material_index_line;
    int material_index_yellow;
    vtGeode *pGeodeObject;
    vtGeode *pGeodeLine;

    VizMap m_Map;

    // Edit tracking
    bool CreateAtOnce();
    bool m_bNeedRebuild;
};

#endif // ABSTRACTLAYERH