BoundedLine.h

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#ifndef __BoundedLine_H__
#define __BoundedLine_H__

#include "Line.h"
#include "Vector2.h"

namespace EdgeDetection
{
        // Represents a bounded line in two-dimensional space.
        class BoundedLine : public Line
        {
                private: Vector2 start;
                private: Vector2 end;

                public: Vector2 GetStart() { return start; }
                public: Vector2 GetEnd() { return end; }
                public: double GetLength() { return Vector2::Subtract(start, end).GetLength(); }

                public: BoundedLine()
                {
                        this->start = Vector2();
                        this->end = Vector2();
                }
                public: BoundedLine(Vector2 start, Vector2 end) : Line(end.GetY() - start.GetY(), start.GetX() - end.GetX(), end.GetX() * start.GetY() - start.GetX() * end.GetY())
                {
                        if (Vector2::Equals(start, end)) throw "The parameters 'start' and 'end' cannot be the same.";

                        this->start = start;
                        this->end = end;
                }
                public: ~BoundedLine() { }

                public: Vector2 GetPosition(double fraction)
                {
                        if (fraction < 0 || fraction > 1) throw "The parameter 'fraction' was out of range.";

                        return Vector2::Add(start, Vector2::Multiply(fraction, Vector2::Subtract(end, start)));
                }
        };
};

#endif