gunu_revolve.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 /************************************************************************
00021   CIRCLE, SURFACES OF REVOLUTION, SPHERE
00022 *************************************************************************/
00023 
00024 #ifndef GUGE_REVOLVE_H
00025 #define GUGE_REVOLVE_H
00026 
00027 namespace gunu {
00028 
00029 using gul::Ptr;
00030 using gul::point;
00031 using gul::hpoint;
00032 
00033 /*---------------------------------------------------------------------*//**
00034   Create a circle as a NURBS curve (see "The NURBS book")                 */
00035 /*------------------------------------------------------------------------*/  
00036 template< class T >
00037 void Circle(
00038             point<T> O,  /* center (origin of local coordinate system) */
00039             point<T> X,  /* X-axis of loc.-coord.-syst., |X| = |Y| = 1 */
00040             point<T> Y,  /* Y-axis of loc.-coord.-syst., perpendicular to X */
00041             T r,           /* radius */
00042             T theta_start, /* start angle (in radians)(in regard to X) */
00043             T theta_end,   /* end angle (in radians)(in regard to X) */
00044             int    *ret_n, /* => number of controlpoints - 1 */
00045             int *ret_p,    /* => degree */
00046             Ptr<T> *retU,             /* => knot vector */
00047             Ptr< hpoint<T> > *retPw   /* => control points */  );
00048 
00049 /*----------------------------------------------------------------------*//**
00050   Creates a surface of revolution                                          */
00051 /*-------------------------------------------------------------------------*/  
00052 template< class T, class CHP >
00053 GULAPI void Revolution(
00054            point<T> S,  /* point on rotation axis */
00055            point<T> A,  /* direction of axis, |A| = 1 */
00056            T theta,     /* rotation angle (in radians) */
00057            int m,       /* number of control points -1 of rotated curve */
00058            Ptr< CHP >& Pwj,  /* control points of rotated curve */
00059            int *ret_nu, /* number of control points -1  per row of the surface*/
00060            int *ret_pu,  /* degree of surface of revolution (for rows) */
00061            Ptr<T> *retU, /* knotvector of surface of revolution (for rows)*/
00062            Ptr< Ptr< hpoint<T> > >*retPw);/*control points of surface of rev. */
00063 
00064 /*-----------------------------------------------------------------------*//**
00065   Creates a unit sphere (centered at origin)                                */
00066 /*--------------------------------------------------------------------------*/
00067 template< class T >
00068 GULAPI void UnitSphere( 
00069             int *ret_nu, int *ret_pu, Ptr<T> *retU,
00070             int *ret_nv, int *ret_pv, Ptr<T> *retV,
00071             Ptr< Ptr< hpoint<T> > > *retPw );
00072 
00073 }
00074 
00075 #endif
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