LineSegment.h

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/******************************************************************************
 * Project:  libspatialindex - A C++ library for spatial indexing
 * Author:   Marios Hadjieleftheriou, [email protected]
 ******************************************************************************
 * Copyright (c) 2004, Marios Hadjieleftheriou
 *
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
******************************************************************************/
 
#pragma once
 
namespace SpatialIndex
{
        class SIDX_DLL LineSegment : public Tools::IObject, public virtual IShape
        {
        public:
                LineSegment();
                LineSegment(const double* startPoint, const double* endPoint, uint32_t dimension);
                LineSegment(const Point& startPoint, const Point& endPoint);
                LineSegment(const LineSegment& l);
                virtual ~LineSegment();
 
                virtual LineSegment& operator=(const LineSegment& p);
                virtual bool operator==(const LineSegment& p) const;
 
                //
                // IObject interface
                //
                virtual LineSegment* clone();
 
                //
                // ISerializable interface
                //
                virtual uint32_t getByteArraySize();
                virtual void loadFromByteArray(const byte* data);
                virtual void storeToByteArray(byte** data, uint32_t& length);
 
                //
                // IShape interface
                //
                virtual bool intersectsShape(const IShape& in) const;
                virtual bool containsShape(const IShape& in) const;
                virtual bool touchesShape(const IShape& in) const;
                virtual void getCenter(Point& out) const;
                virtual uint32_t getDimension() const;
                virtual void getMBR(Region& out) const;
                virtual double getArea() const;
                virtual double getMinimumDistance(const IShape& in) const;
 
                virtual bool intersectsLineSegment(const LineSegment& l) const;
                virtual bool intersectsRegion(const Region& p) const;
                virtual double getMinimumDistance(const Point& p) const;
                //virtual double getMinimumDistance(const Region& r) const;
                virtual double getRelativeMinimumDistance(const Point& p) const;
                virtual double getRelativeMaximumDistance(const Region& r) const;
                virtual double getAngleOfPerpendicularRay();
 
                virtual void makeInfinite(uint32_t dimension);
                virtual void makeDimension(uint32_t dimension);
        
        public:
                uint32_t m_dimension;
                double* m_pStartPoint;
                double* m_pEndPoint;
 
                friend class Region;
                friend class Point;
                friend SIDX_DLL std::ostream& operator<<(std::ostream& os, const LineSegment& pt);
 
    protected:
 
        //some helpers for intersects methods
        static double doubleAreaTriangle(const Point& a, const Point& b, const Point& c); 
        static bool leftOf(const Point& a, const Point& b, const Point& c); 
        static bool collinear(const Point& a, const Point& b, const Point& c); 
        static bool between(const Point& a, const Point& b, const Point& c); 
        static bool between(double a, double b, double c); 
        static bool intersectsProper(const Point& a, const Point& b, const Point& c, const Point& d); 
        static bool intersects(const Point& a, const Point& b, const Point& c, const Point& d); 
 
        }; // LineSegment
 
        SIDX_DLL std::ostream& operator<<(std::ostream& os, const LineSegment& pt);
}