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Diffstat (limited to 'mesalib/src/glu/sgi/libnurbs/internals/knotvector.cc')
| -rw-r--r-- | mesalib/src/glu/sgi/libnurbs/internals/knotvector.cc | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/internals/knotvector.cc b/mesalib/src/glu/sgi/libnurbs/internals/knotvector.cc deleted file mode 100644 index dcbf0067d..000000000 --- a/mesalib/src/glu/sgi/libnurbs/internals/knotvector.cc +++ /dev/null @@ -1,142 +0,0 @@ -/* -** 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. -*/ - -/* - * knotvector.c++ - * - */ - -#include "glimports.h" -#include "mystdio.h" -#include "myassert.h" -#include "knotvector.h" -#include "defines.h" - -#ifdef __WATCOMC__ -#pragma warning 726 10 -#endif - -void Knotvector::init( long _knotcount, long _stride, long _order, INREAL *_knotlist ) -{ - knotcount = _knotcount; - stride = _stride; - order = _order; - knotlist = new Knot[_knotcount]; - assert( knotlist != 0 ); - - for( int i = 0; i != _knotcount; i++ ) - knotlist[i] = (Knot) _knotlist[i]; -} - -Knotvector::Knotvector( void ) -{ - knotcount = 0; - stride = 0; - order = 0; - knotlist = 0; -} - -Knotvector::~Knotvector( void ) -{ - if( knotlist ) delete[] knotlist; -} - -int Knotvector::validate( void ) -{ - /* kindex is used as an array index so subtract one first, - * this propagates throughout the code so study carefully */ - long kindex = knotcount-1; - - if( order < 1 || order > MAXORDER ) { - // spline order un-supported - return( 1 ); - } - - if( knotcount < (2 * order) ) { - // too few knots - return( 2 ); - } - - if( identical( knotlist[kindex-(order-1)], knotlist[order-1]) ) { - // valid knot range is empty - return( 3 ); - } - - for( long i = 0; i < kindex; i++) - if( knotlist[i] > knotlist[i+1] ) { - // decreasing knot sequence - return( 4 ); - } - - /* check for valid multiplicity */ - - /* kindex is currently the index of the last knot. - * In the next loop it is decremented to ignore the last knot - * and the loop stops when kindex is 2 so as to ignore the first - * knot as well. These knots are not used in computing - * knot multiplicities. - */ - - long multi = 1; - for( ; kindex >= 1; kindex-- ) { - if( knotlist[kindex] - knotlist[kindex-1] < TOLERANCE ) { - multi++; - continue; - } - if ( multi > order ) { - // knot multiplicity greater than order of spline - return( 5 ); - } - multi = 1; - } - - if ( multi > order ) { - // knot multiplicity greater than order of spline - return( 5 ); - } - - return 0; -} - -void Knotvector::show( const char *msg ) -{ -#ifndef NDEBUG - _glu_dprintf( "%s\n", msg ); - _glu_dprintf( "order = %ld, count = %ld\n", order, knotcount ); - - for( int i=0; i<knotcount; i++ ) - _glu_dprintf( "knot[%d] = %g\n", i, knotlist[i] ); -#endif -} - |