VRS - The Virtual Rendering System

version 3.3

greenspacecompositepainter.h

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#ifndef GREENSPACECOMPOSITEPAINTER_H
#define GREENSPACECOMPOSITEPAINTER_H

#include <vrs/environment/config.h>
#include <vrs/shapepainter.h>
#include <vrs/container/dictionary.h>
#include <vector>


namespace VRS {
    class Engine;
    class Shape;
    class Engine;
    class Image;
    class MonoAttribute;
    class Facet;
    class PolygonSet;
    class ImageTexture2DGL;
    template<typename T> class NonPersistentArray;
}

namespace EnvironmentRenderer {

    class GreenSpaceComposite;
    class GreenSpace;

    class VRS_ENV_API GreenSpaceCompositePainter : public VRS::ShapePainter {
    public:

        virtual VRS::ID target() const;

        virtual bool render(VRS::Engine*, const VRS::Shape*);

        VRS_TYPEINFO(GreenSpaceCompositePainter, VRS::ShapePainter);

    protected:
        struct GreenSpaceCompositeData
        {
            VRS::SO<VRS::MonoAttribute> atlasTexture;
            VRS::SO<VRS::MonoAttribute> tussockGeometry;
        };

        VRS::SO<VRS::Iterator<VRS::SO<VRS::Facet> > > getSurfacePolygons(VRS::SO<VRS::Iterator<VRS::SO<VRS::Facet> > > surface);
        //unsigned int createGrass(VRS::SO<VRS::PolygonSet> surface,
        //                         VRS::SO<GreenSpace> gs,
        //                         VRS::SO<VRS::NonPersistentArray<VRS::SO<VRS::PolygonSet> > > tussocksArray,
        //                         VRS::SO<VRS::NonPersistentArray<VRS::SO<VRS::Image> > > texturesArray);

        unsigned int createGrass(VRS::SO<VRS::Iterator<VRS::SO<VRS::Facet> > > surface,
                                 VRS::SO<GreenSpace> gs,
                                 VRS::SO<VRS::NonPersistentArray<VRS::SO<VRS::PolygonSet> > > tussocksArray,
                                 VRS::SO<VRS::NonPersistentArray<VRS::SO<VRS::Image> > > texturesArray);


        VRS::SO<VRS::NonPersistentDictionary<GreenSpaceComposite*, GreenSpaceCompositeData> > m_compositeData;

        // to avoid memory-leaks, a GSComposite's geometry is removed from the painter, if the
        // GSComposite is destroyed
        VRS::SO<VRS::Callback1<VRS::SharedObj*> > m_compositeDestructionCallback;
        void removeCompositeFromPainter(VRS::SharedObj* s);


        void updateComposite(VRS::SO<GreenSpaceComposite> gsc, GreenSpaceCompositeData &data);
        VRS::SO<VRS::ImageTexture2DGL> createTextureAtlas(VRS::SO<VRS::Iterator<VRS::SO<VRS::PolygonSet> > > tussocks,
                                                          VRS::SO<VRS::Iterator<VRS::SO<VRS::Image> > > tussockTextures);

        // GreenSpaces used by GSComposites are cached. There are two advantages caching the
        // geometry:
        //     1. recreationtime reduces, as geometry is generated only for those GreenSpaces
        //        that were modified
        //     2. GreenSpaces that were not modified remain uneffected by the recreation process.
        //        Without caching, 'replanting' the grass occured for all GreenSpaces, thus
        //        the tussock positions altered across the whole GSComposite which can be
        //        confusing if you do not expect it.
        struct GreenSpaceData
        {
            VRS::SO<VRS::NonPersistentArray<VRS::SO<VRS::PolygonSet> > > tussocks;
            VRS::SO<VRS::NonPersistentArray<VRS::SO<VRS::Image> > > textures;
        };

        VRS::SO<VRS::NonPersistentDictionary<GreenSpace*, GreenSpaceData> > m_gsData;

        // stores which tussocks were newly created and need texCoord-transformation due to the
        // textureatlas
        std::vector<bool> m_updateTextureCoordinates;

        // same purpose as for GSComposites
        VRS::SO<VRS::Callback1<VRS::SharedObj*> > m_gsDestructionCallback;
        void removeGreenSpaceFromPainter(VRS::SharedObj* s);

    };

} // namepsace EnvironmentRenderer

#endif // GREENSPACECOMPOSITEPAINTER_H

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