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112 lines
3.4 KiB
C++
112 lines
3.4 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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* curvelist.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/curvelist.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 "quilt.h"
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#include "curvelist.h"
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#include "curve.h"
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#include "nurbsconsts.h"
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#include "types.h"
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Curvelist::Curvelist( Quilt *quilts, REAL pta, REAL ptb )
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{
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curve = 0;
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for( Quilt *q = quilts; q; q = q->next )
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curve = new Curve( q, pta, ptb, curve );
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range[0] = pta;
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range[1] = ptb;
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range[2] = ptb - pta;
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}
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Curvelist::Curvelist( Curvelist &upper, REAL value )
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{
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Curvelist &lower = *this;
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curve = 0;
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for( Curve *c = upper.curve; c; c = c->next )
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curve = new Curve( *c, value, curve );
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lower.range[0] = upper.range[0];
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lower.range[1] = value;
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lower.range[2] = value - upper.range[0];
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upper.range[0] = value;
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upper.range[2] = upper.range[1] - value;
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}
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Curvelist::~Curvelist()
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{
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while( curve ) {
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Curve *c = curve;
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curve = curve->next;
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delete c;
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}
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}
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int
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Curvelist::cullCheck( void )
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{
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for( Curve *c = curve; c; c = c->next )
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if( c->cullCheck() == CULL_TRIVIAL_REJECT )
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return CULL_TRIVIAL_REJECT;
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return CULL_ACCEPT;
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}
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void
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Curvelist::getstepsize( void )
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{
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stepsize = range[2];
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Curve *c;
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for( c = curve; c; c = c->next ) {
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c->getstepsize();
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c->clamp();
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stepsize = ((c->stepsize < stepsize) ? c->stepsize : stepsize);
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if( c->needsSamplingSubdivision() ) break;
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}
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needsSubdivision = ( c ) ? 1 : 0;
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}
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int
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Curvelist::needsSamplingSubdivision( void )
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{
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return needsSubdivision;
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}
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