TAPsNURBs.hpp

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/******************************************************************************
TAPsNURBs.hpp

A (Generic) collection of Splines:

SUKITTI PUNAK   (12/16/2005)
UPDATE          (12/16/2005)
******************************************************************************/
/******************************************************************************
A NURBs Curve
=============
Degree: d
Knot sequence:  {k_0,...,k_K}
Control points: c_0,...,c_N, with N = K - d + 1
Domain: Curve is only defined over [k_{d-1},...,k_N]
******************************************************************************/
#ifndef TAPs_NURBS_HPP
#define TAPs_NURBS_HPP

#include "../Core/TAPsCGMath.hpp"

BEGIN_NAMESPACE_TAPs
//=============================================================================
template <typename T>
class NURBs {
    //-------------------------------------------------------------------------
    // (Friend Fn) put it through ostream
    friend std::ostream & operator<< ( std::ostream &output, NURBs<T> const &o )
    {
        output  << "\n======================\n"
                <<   "TAPs::NURBs<"
                << typeid(T).name() << "> Class:\n"
                <<   "======================\n";
        return output;
    }
//-----------------------------------------------------------------------------
// Member Functions ------------------------------------------------------------
public:
    //-------------------------------------------------------------------------
    // default constructor
    NURBs ();
    //-------------------------------------------------------------------------
    // nondefault constructor
    NURBs ( Vector3<T> ** ctrlPts, 
            int numUPts, int numVPts, 
            int uDegree, int vDegree, 
            int numOfUKnots, int numOfVKnots, 
            T * uKnots, T * vKnots );
    //-------------------------------------------------------------------------
    // destructor
    virtual ~NURBs ();
    //-------------------------------------------------------------------------
    // Get/Set Fn(s)
    //-------------------------------------------------------------------------
    // Fn(s)
    Vector3<T> RetAPointOnSurface ( T u, T v );
    Vector3<T> RetAPointOnCurve ( T u );        // u-direction only
    Vector3<T> RetAPointOnCurveToo ( T u );     // u-direction only
    //-------------------------------------------------------------------------
#if defined(__gl_h_) || defined(__GL_H__)
    //-------------------------------------------------------------------------
    // OpenGL Fn(s)
public:
    // DrawByOpenGL
    virtual void DrawByOpenGL ();
#endif
    //-------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Data Members  ---------------------------------------------------------------
protected:
    Vector3<T> **   m_prCtrlPts;    // 3D control points in 1D array
    int             m_iNumUPts;     // number of u-direction control points
    int             m_iNumVPts;     // number of v-direction control points
    int             m_iUDegree;     // u degree
    int             m_iVDegree;     // v degree
    int             m_iNumKnotU;    // number of u knots
    int             m_iNumKnotV;    // number of v knots
    T *             m_prKnotU;      // horizontral knot sequence (u-direction)
    T *             m_prKnotV;      // vertical knot sequence (v-direction)
};
//=============================================================================
END_NAMESPACE_TAPs
//-----------------------------------------------------------------------------
// Include definition if TAPs_USE_EXPORT is not defined
//#if !defined( TAPs_USE_EXPORT )
    #include "TAPsNURBs.cpp"
//#endif
//-----------------------------------------------------------------------------
#endif
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