gunu_sample.h Source File

00001 /* LIBGUL - Geometry Utility Library
00002  * Copyright (C) 1998-1999 Norbert Irmer
00003  *
00004  * This library is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Library General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2 of the License, or (at your option) any later version.
00008  *
00009  * This library is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * Library General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU Library General Public
00015  * License along with this library; if not, write to the
00016  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00017  * Boston, MA 02111-1307, USA.
00018  */
00019  
00020 #ifndef GUNU_SAMPLE_H
00021 #define GUNU_SAMPLE_H
00022 
00023 namespace gunu {
00024 
00025 /*--------------------------------------------------------------
00026   Calculates the Greville abscissa values for a knot vector,
00027   'n+1' values are calculated
00028 ---------------------------------------------------------------*/
00029 template< class T >
00030 void CalcGrevilleAbcissa( int n, int p, const Ptr<T>& U, Ptr<T>& G );
00031 
00032 /*-----------------------------------------------------------------
00033   Calculates equally spaced parameter values
00034 -----------------------------------------------------------------*/
00035 template< class T >
00036 GULAPI void EqualSpacedParameters( int n, T u1, T u2, Ptr<T>& U );
00037 
00038 /*---------------------------------------------------------------------
00039   Calculates a matrix of sample points for a surface, the parameter values
00040   for rows and columns must be given in the arrays 'sampV' and 'sampU'
00041 -----------------------------------------------------------------------*/  
00042 template< class T, class HP, class EP >
00043 void CalcSurfaceMesh( int nu, int pu, const Ptr<T>& U,
00044                       int nv, int pv, const Ptr<T>& V,
00045                       const Ptr< Ptr<HP> >& Pw,
00046                       int nSampU, const Ptr<T>& sampU,
00047                       int nSampV, const Ptr<T>& sampV,
00048                       Ptr< Ptr<EP> >& sampP );
00049 
00050 /*---------------------------------------------------------------
00051   Calculates the control points of a iso curve with constant u value
00052   of a nurbs surface
00053 ---------------------------------------------------------------*/
00054 template< class T, class HP >
00055 GULAPI void ExtractIsoCurveU( T u, 
00056                        int nu, int pu, const Ptr<T>& U,
00057                        int nv, int pv, const Ptr<T>& V,
00058                        const Ptr< Ptr<HP> >& Pw,
00059                        Ptr<HP>& Cw );
00060 /*---------------------------------------------------------------
00061   Calculates the control points of a iso curve with constant v value
00062   of a nurbs surface
00063 ---------------------------------------------------------------*/
00064 template< class T, class HP >
00065 GULAPI void ExtractIsoCurveV( T v, 
00066                        int nu, int pu, const Ptr<T>& U,
00067                        int nv, int pv, const Ptr<T>& V,
00068                        const Ptr< Ptr<HP> >& Pw,
00069                        Ptr<HP>& Cw );
00070 
00071 }
00072 
00073 
00074 #endif