// Geometric Tools, Inc.
// http://www.geometrictools.com
// Copyright (c) 1998-2005.  All Rights Reserved
//
// The Wild Magic Library (WM3) source code is supplied under the terms of
// the license agreement
//     http://www.geometrictools.com/License/WildMagic3License.pdf
// and may not be copied or disclosed except in accordance with the terms
// of that agreement.

#ifndef WM3INTRARC2CIRCLE2_H
#define WM3INTRARC2CIRCLE2_H

#include "Wm3Intersector.h"
#include "Wm3Arc2.h"
#include "Wm3Circle2.h"

namespace Wm3
{

template <class Real>
class WM3_ITEM IntrArc2Circle2 : public Intersector<Real,Vector2<Real> >
{
public:
    IntrArc2Circle2 (const Arc2<Real>& rkArc, const Circle2<Real>& rkCircle);

    // object access
    const Arc2<Real>& GetArc () const;
    const Circle2<Real>& GetCircle () const;

    // static find-intersection query
    virtual bool Find ();

    // Intersection set for static find-intersection query.  The quantity Q is
    // 0, 1, or 2.  When Q > 0, the interpretation depends on the intersection
    // type.
    //   IT_POINT:  Q distinct points of intersection
    //   IT_OTHER:  The arc is already on the circle.  The arc is the full
    //              intersection set, returned by GetIntersectionArc.  Q is
    //              invalid.
    int GetQuantity () const;
    const Vector2<Real>& GetPoint (int i) const;
    const Arc2<Real>& GetIntersectionArc () const;

private:
    using Intersector<Real,Vector2<Real> >::IT_EMPTY;
    using Intersector<Real,Vector2<Real> >::IT_POINT;
    using Intersector<Real,Vector2<Real> >::IT_OTHER;
    using Intersector<Real,Vector2<Real> >::m_iIntersectionType;

    // the objects to intersect
    const Arc2<Real>& m_rkArc;
    const Circle2<Real>& m_rkCircle;

    // points of intersection
    int m_iQuantity;
    Vector2<Real> m_akPoint[2];
};

typedef IntrArc2Circle2<float> IntrArc2Circle2f;
typedef IntrArc2Circle2<double> IntrArc2Circle2d;

}

#endif



