mirror of
https://github.com/reactos/reactos.git
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120 lines
3.8 KiB
C++
120 lines
3.8 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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*/
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/*
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* flist.c++
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*
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* $Date$ $Revision: 1.1 $
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* $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/internals/flist.cc,v 1.1 2004/02/02 16:39:11 navaraf Exp $
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*/
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#include "glimports.h"
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#include "myassert.h"
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#include "mystdio.h"
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#include "flist.h"
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/*----------------------------------------------------------------------------
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* Flist::Flist - initialize a REAL number array
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*----------------------------------------------------------------------------
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*/
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Flist::Flist( void )
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{
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npts = 0;
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pts = 0;
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start = end = 0;
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}
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/*----------------------------------------------------------------------------
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* Flist::~Flist - free a REAL number array
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*----------------------------------------------------------------------------
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*/
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Flist::~Flist( void )
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{
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if( npts ) delete[] pts;
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}
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void
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Flist::add( REAL x )
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{
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pts[end++] = x;
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assert( end <= npts );
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}
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/*----------------------------------------------------------------------------
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* Flist::filter - remove duplicate numbers from array
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*----------------------------------------------------------------------------
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*/
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void Flist::filter( void )
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{
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sorter.qsort( pts, end );
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start = 0;
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int j = 0;
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for( int i = 1; i < end; i++ ) {
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if( pts[i] == pts[i-j-1] )
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j++;
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pts[i-j] = pts[i];
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}
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end -= j;
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}
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/*----------------------------------------------------------------------------
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* Flist::grow - ensure that array is large enough
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*----------------------------------------------------------------------------
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*/
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void Flist::grow( int maxpts )
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{
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if( npts < maxpts ) {
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if( npts ) delete[] pts;
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npts = 2 * maxpts;
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pts = new REAL[npts];
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assert( pts != 0 );
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}
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start = end = 0;
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}
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/*----------------------------------------------------------------------------
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* Flist::taper - ignore head and tail of array
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*----------------------------------------------------------------------------
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*/
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void Flist::taper( REAL from, REAL to )
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{
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while( pts[start] != from )
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start++;
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while( pts[end-1] != to )
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end--;
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}
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