SplineUtils.h

//===========================================================================
// GoTools - SINTEF Geometry Tools version 1.1
//
// GoTools module: CORE
//
// Copyright (C) 2000-2007 SINTEF ICT, Applied Mathematics, Norway.
//
// This program is free software; you can redistribute it and/or          
// modify it under the terms of the GNU General Public License            
// as published by the Free Software Foundation version 2 of the License. 
//
// This program is distributed in the hope that it will be useful,        
// but WITHOUT ANY WARRANTY; without even the implied warranty of         
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          
// GNU General Public License for more details.                           
//
// You should have received a copy of the GNU General Public License      
// along with this program; if not, write to the Free Software            
// Foundation, Inc.,                                                      
// 59 Temple Place - Suite 330,                                           
// Boston, MA  02111-1307, USA.                                           
//
// Contact information: E-mail: tor.dokken@sintef.no                      
// SINTEF ICT, Department of Applied Mathematics,                         
// P.O. Box 124 Blindern,                                                 
// 0314 Oslo, Norway.                                                     
//
// Other licenses are also available for this software, notably licenses
// for:
// - Building commercial software.                                        
// - Building software whose source code you wish to keep private.        
//===========================================================================
#ifndef _GOSPLINEUTILS_H
#define _GOSPLINEUTILS_H


#include "SplineSurface.h"
#include "SplineCurve.h"
#include "errormacros.h"
#include <math.h>
#include <algorithm>
#include <ctype.h>


namespace Go {



    void transpose_array(int dim, int m, int n, double* array_start);

    int closest_in_array(const double* pt,
                         const double* array,
                         int n, 
                         int dim);

    Vector3D closest_on_triangle(const Vector3D& pt,
                                 const Vector3D tri[3],
                                 double& clo_dist2);

    double closest_on_line_segment(const Vector3D& pt,
                                   const Vector3D& beg,
                                   const Vector3D& end);


    void closest_on_rectgrid(const double* pt,
                             const double* array,
                             int m, int n,
                             double& clo_u,
                             double& clo_v);

    void closest_on_rectgrid(const double* pt, const double* array,
                             int u_min, int u_max, int v_min, int v_max,
                             int nmb_coefs_u,
                             double& clo_u, double& clo_v);


    void make_coef_array_from_rational_coefs(const double* rationals,
                                             double* coefs,
                                             int num_coefs,
                                             int dim);

    void curve_ratder(double const eder[],int idim,int ider,double gder[]);

    void surface_ratder(double const eder[],int idim,int ider,double gder[]);

    void osloalg(int ij,int imy,int ik,int in,int *jpl,int *jfi,int *jla,
                 double *et,double *etau,double *galfa);

    void refmatrix(double *et, int im, int ik, 
                   double *etau, int in,
                   double *ea, int *nfirst,int *nlast);

} // End of namespace Go


#endif

---