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Diffstat (limited to 'src/glu/sgi/libnurbs/internals/flist.cc')
| -rw-r--r-- | src/glu/sgi/libnurbs/internals/flist.cc | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/glu/sgi/libnurbs/internals/flist.cc b/src/glu/sgi/libnurbs/internals/flist.cc new file mode 100644 index 00000000000..21414fd736d --- /dev/null +++ b/src/glu/sgi/libnurbs/internals/flist.cc @@ -0,0 +1,120 @@ +/* +** License Applicability. Except to the extent portions of this file are +** made subject to an alternative license as permitted in the SGI Free +** Software License B, Version 1.1 (the "License"), the contents of this +** file are subject only to the provisions of the License. You may not use +** this file except in compliance with the License. You may obtain a copy +** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 +** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: +** +** http://oss.sgi.com/projects/FreeB +** +** Note that, as provided in the License, the Software is distributed on an +** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS +** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND +** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A +** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. +** +** Original Code. The Original Code is: OpenGL Sample Implementation, +** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, +** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. +** Copyright in any portions created by third parties is as indicated +** elsewhere herein. All Rights Reserved. +** +** Additional Notice Provisions: The application programming interfaces +** established by SGI in conjunction with the Original Code are The +** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released +** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version +** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X +** Window System(R) (Version 1.3), released October 19, 1998. This software +** was created using the OpenGL(R) version 1.2.1 Sample Implementation +** published by SGI, but has not been independently verified as being +** compliant with the OpenGL(R) version 1.2.1 Specification. +*/ + +/* + * flist.c++ + * + * $Date: 2001/03/17 00:25:40 $ $Revision: 1.1 $ + * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/flist.cc,v 1.1 2001/03/17 00:25:40 brianp Exp $ + */ + +#include "glimports.h" +#include "myassert.h" +#include "mystdio.h" +#include "flist.h" + +/*---------------------------------------------------------------------------- + * Flist::Flist - initialize a REAL number array + *---------------------------------------------------------------------------- + */ +Flist::Flist( void ) +{ + npts = 0; + pts = 0; + start = end = 0; +} + +/*---------------------------------------------------------------------------- + * Flist::~Flist - free a REAL number array + *---------------------------------------------------------------------------- + */ +Flist::~Flist( void ) +{ + if( npts ) delete[] pts; +} + +void +Flist::add( REAL x ) +{ + pts[end++] = x; + assert( end <= npts ); +} + +/*---------------------------------------------------------------------------- + * Flist::filter - remove duplicate numbers from array + *---------------------------------------------------------------------------- + */ +void Flist::filter( void ) +{ + sorter.qsort( pts, end ); + start = 0; + + int j = 0; + for( int i = 1; i < end; i++ ) { + if( pts[i] == pts[i-j-1] ) + j++; + pts[i-j] = pts[i]; + } + end -= j; +} + +/*---------------------------------------------------------------------------- + * Flist::grow - ensure that array is large enough + *---------------------------------------------------------------------------- + */ +void Flist::grow( int maxpts ) +{ + if( npts < maxpts ) { + if( npts ) delete[] pts; + npts = 2 * maxpts; + pts = new REAL[npts]; + assert( pts != 0 ); + } + start = end = 0; +} + +/*---------------------------------------------------------------------------- + * Flist::taper - ignore head and tail of array + *---------------------------------------------------------------------------- + */ +void Flist::taper( REAL from, REAL to ) +{ + while( pts[start] != from ) + start++; + + while( pts[end-1] != to ) + end--; +} + + |