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Tuple3.h

/*
 * SOLID - Software Library for Interference Detection
 * 
 * Copyright (C) 2001-2003  Dtecta.  All rights reserved.
 *
 * This library may be distributed under the terms of the Q Public License
 * (QPL) as defined by Trolltech AS of Norway and appearing in the file
 * LICENSE.QPL included in the packaging of this file.
 *
 * This library may be distributed and/or modified under the terms of the
 * GNU General Public License (GPL) version 2 as published by the Free Software
 * Foundation and appearing in the file LICENSE.GPL included in the
 * packaging of this file.
 *
 * This library is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Commercial use or any other use of this library not covered by either 
 * the QPL or the GPL requires an additional license from Dtecta. 
 * Please contact info@dtecta.com for enquiries about the terms of commercial
 * use of this library.
 */

#ifndef TUPLE3_H
#define TUPLE3_H

#if defined (__sgi)
#include <assert.h>
#else
#include <cassert>
#endif

#include <iostream>

namespace MT {

      template <typename Scalar>
      class Tuple3 {
      public:
            Tuple3() {}
            
            template <typename Scalar2>
            explicit Tuple3(const Scalar2 *v) 
            { 
                  setValue(v);
            }
            
            template <typename Scalar2>
            Tuple3(const Scalar2& x, const Scalar2& y, const Scalar2& z) 
            { 
                  setValue(x, y, z); 
            }
            
            template <typename Scalar2>
            Tuple3(const Tuple3<Scalar2>& t) 
            { 
                  *this = t; 
            }
            
            template <typename Scalar2>
            Tuple3<Scalar>& operator=(const Tuple3<Scalar2>& t) 
            { 
                  m_co[0] = Scalar(t[0]); 
                  m_co[1] = Scalar(t[1]); 
                  m_co[2] = Scalar(t[2]);
                  return *this;
            }
            
            operator       Scalar *()       { return m_co; }
            operator const Scalar *() const { return m_co; }

            Scalar&       operator[](int i)       { return m_co[i];     }      
            const Scalar& operator[](int i) const { return m_co[i]; }

            Scalar&       x()       { return m_co[0]; }
            const Scalar& x() const { return m_co[0]; }
            
            Scalar&       y()       { return m_co[1]; }
            const Scalar& y() const { return m_co[1]; }
            
            Scalar&       z()       { return m_co[2]; }
            const Scalar& z() const { return m_co[2]; }

            template <typename Scalar2>
            void setValue(const Scalar2 *v) 
            {
                  m_co[0] = Scalar(v[0]); 
                  m_co[1] = Scalar(v[1]); 
                  m_co[2] = Scalar(v[2]);
            }

            template <typename Scalar2>
            void setValue(const Scalar2& x, const Scalar2& y, const Scalar2& z)
            {
                  m_co[0] = Scalar(x); 
                  m_co[1] = Scalar(y); 
                  m_co[2] = Scalar(z);
            }

            template <typename Scalar2>
            void getValue(Scalar2 *v) const 
            {
                  v[0] = Scalar2(m_co[0]);
                  v[1] = Scalar2(m_co[1]);
                  v[2] = Scalar2(m_co[2]);
            }
    
      protected:
            Scalar m_co[3];                            
      };

      template <typename Scalar>
      inline std::ostream& 
      operator<<(std::ostream& os, const Tuple3<Scalar>& t)
      {
            return os << t[0] << ' ' << t[1] << ' ' << t[2];
      }
}

#endif

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