PatternTraceRendererData.h

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#ifndef CHRYSALIS_PATTERNSPACERENDERERDATA_H
#define CHRYSALIS_PATTERNSPACERENDERERDATA_H
 
#include <vector>
 
#include "Point.h"
#include "Layout.h"
#include "Vertex3f.h"
#include "BaseRendererData.h"
#include "BaseObservableRendererData.h"
#include "PatternSpace.h"
#include "observers/PatternTraceObserver.h"
 
namespace Chrysalis {
    class PatternTraceRendererData: public BaseObservableRendererData<Vertex3f>, public PatternTraceObserver, public PointObserver {
        struct Arrow {
            CG::Point baseBegin;
            CG::Point baseEnd;
            CG::Point leftWing;
            CG::Point rightWing;
        };
    public:
        explicit PatternTraceRendererData(BaseObservable<PatternTraceObserver>* observable,
                                          const std::vector<BaseRendererObserver*>& observers);
        ~PatternTraceRendererData() override;
 
        static constexpr float POINT_RADIUS = 0.25f;
 
        void pointMoved(const Point* point) override;
        void pointAdded(const Point* point) override;
        void curveAdded(const Curve* curve) override;
        void transformed(const Transformation& transformation) override;
        void relativePointConnectionAdded(const Point* from, const Point* to) override;
        void relativePointConnectionRemoved(const Point* from, const Point* to) override;
 
        size_t size() override;
        std::vector<Vertex3f> vbo() override;
 
        [[nodiscard]] Layout pointsLayout() const;
        [[nodiscard]] std::vector<Layout> linesLayout() const;
        [[nodiscard]] std::vector<Layout> arrowsLayout() const;
 
        [[nodiscard]] const Point* pointAtPosition(float x, float y) const;
    private:
        static float length(const CG::Point& pointFrom, const CG::Point& pointTo);
        static Arrow buildArrow(const CG::Point& pointFrom, const CG::Point& pointTo);
        static CG::Point intersectionPoint(const CG::Point& pointFrom, const CG::Point& pointTo);
 
        BaseObservable<PatternTraceObserver>* observable_;
 
        std::vector<Vertex3f> points_;
        std::vector<Vertex3f> arrows_;
        std::vector<std::vector<Vertex3f>> lines_;
 
        std::unordered_map<const Point*, int> pointIndices_;
        std::unordered_map<const Point*, std::unordered_map<const Point*, int>> connectionsMapFrom_; // <from, <to, line index>>
        std::unordered_map<const Point*, std::unordered_map<const Point*, int>> connectionsMapTo_; // <to, <from, line index>>
    };
}
 
#endif //CHRYSALIS_PATTERNSPACERENDERERDATA_H