TAPsTriangle.hpp

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/******************************************************************************
TAPsTriangle.hpp

Triangle class is a class for 3D Triangle composed of three Vector3<T> as their 
vertices.  The vertices must be listed in counter-clockwise direction.

Example:
          2-------1
           \      |
            \     |
             \    |
              \   |
               \  |
                \ |
                 \|
                  0

SUKITTI PUNAK   (03/11/2006)
UPDATE          (03/15/2006)
******************************************************************************/
#ifndef TAPs_TRIANGLE_HPP
#define TAPs_TRIANGLE_HPP

#include "../Core/TAPsVector3.hpp"

BEGIN_NAMESPACE_TAPs
//=============================================================================
template <typename T>
class Triangle {
//=============================================================================
protected:
    Vector3<T>  m_vVertex[3];           // three vertices
//=============================================================================
public:
    //-------------------------------------------------------------------------
    // Output Operator <<
    friend std::ostream & operator<< ( std::ostream &output,  const Triangle<T> &f )
    {
        output  << "Triangle<" << typeid(T).name() << ">:  " 
                << m_vVertex[0] << "  " 
                << m_vVertex[1] << "  " 
                << m_vVertex[2] << "\n";
        return output;
    }
    //-------------------------------------------------------------------------
    // Constructors and destructor
    Triangle ( Vector3<T> V0, Vector3<T> V1, Vector3<T> V2 );
    Triangle ( const T[3] V0, const T[3] V1, const T[3] V2 );
    Triangle ( T V0x, T V0y, T V0z, 
               T V1x, T V1y, T V1z, 
               T V2x, T V2y, T V2z );
    Triangle ( const Triangle<T> & tri );       // copy ctor
    virtual ~Triangle ();
    //-------------------------------------------------------------------------
    // Fn(s) for Normal
    Vector3<T> CalNormal() const;
    //-------------------------------------------------------------------------
    // Get/Set Fn(s)
    inline Vector3<T> & GetVertexNo ( int i )
        { assert( 0 <= i && i < 3 ); return m_vVertex[i]; }
    inline const Vector3<T> & GetVertexNo ( int i ) const
        { assert( 0 <= i && i < 3 ); return m_vVertex[i]; }
    inline void SetVertexNo ( int i, const Vector3<T> & v )
        { assert( 0 <= i && i < 3 ); m_vVertex[i] = v; }
    //-------------------------------------------------------------------------
    // Assignment (Conversion) Operator
    inline Triangle<T> & operator= ( Triangle<T> const & tri );
    //-------------------------------------------------------------------------
}; // END CLASS Triangle
//=============================================================================
END_NAMESPACE_TAPs
//-----------------------------------------------------------------------------
// Include definition if TAPs_USE_EXPORT is not defined
//#if !defined( TAPs_USE_EXPORT )
    #include "TAPsTriangle.cpp"
//#endif
//-----------------------------------------------------------------------------
#endif
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