mirror of
https://github.com/reactos/reactos.git
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140 lines
4.9 KiB
C++
140 lines
4.9 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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* arc.h
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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/arc.h,v 1.1 2004/02/02 16:39:10 navaraf Exp $
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*/
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#ifndef __gluarc_h_
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#define __gluarc_h_
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#include "myassert.h"
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#include "bufpool.h"
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#include "mystdio.h"
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#include "types.h"
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#include "pwlarc.h"
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#include "trimvertex.h"
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class Bin;
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class Arc;
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struct BezierArc;
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typedef class Arc *Arc_ptr;
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enum arc_side { arc_none = 0, arc_right, arc_top, arc_left, arc_bottom };
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class Arc: public PooledObj { /* an arc, in two list, the trim list and bin */
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public:
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static const int bezier_tag;
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static const int arc_tag;
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static const int tail_tag;
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Arc_ptr prev; /* trim list pointer */
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Arc_ptr next; /* trim list pointer */
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Arc_ptr link; /* bin pointers */
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BezierArc * bezierArc; /* associated bezier arc */
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PwlArc * pwlArc; /* associated pwl arc */
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long type; /* curve type */
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long nuid;
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inline Arc( Arc *, PwlArc * );
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inline Arc( arc_side, long );
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Arc_ptr append( Arc_ptr );
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int check( void );
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int isMonotone( void );
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int isDisconnected( void );
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int numpts( void );
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void markverts( void );
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void getextrema( Arc_ptr[4] );
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void print( void );
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void show( void );
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void makeSide( PwlArc *, arc_side );
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inline int isTessellated() { return pwlArc ? 1 : 0; }
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inline long isbezier() { return type & bezier_tag; }
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inline void setbezier() { type |= bezier_tag; }
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inline void clearbezier() { type &= ~bezier_tag; }
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inline long npts() { return pwlArc->npts; }
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inline TrimVertex * pts() { return pwlArc->pts; }
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inline REAL * tail() { return pwlArc->pts[0].param; }
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inline REAL * head() { return next->pwlArc->pts[0].param; }
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inline REAL * rhead() { return pwlArc->pts[pwlArc->npts-1].param; }
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inline long ismarked() { return type & arc_tag; }
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inline void setmark() { type |= arc_tag; }
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inline void clearmark() { type &= (~arc_tag); }
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inline void clearside() { type &= ~(0x7 << 8); }
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inline void setside( arc_side s ) { clearside(); type |= (((long)s)<<8); }
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inline arc_side getside() { return (arc_side) ((type>>8) & 0x7); }
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inline int getitail() { return type & tail_tag; }
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inline void setitail() { type |= tail_tag; }
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inline void clearitail() { type &= (~tail_tag); }
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};
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/*--------------------------------------------------------------------------
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* Arc - initialize a new Arc with the same type and uid of
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* a given Arc and a given pwl arc
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*--------------------------------------------------------------------------
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*/
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inline
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Arc::Arc( Arc *j, PwlArc *p )
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{
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bezierArc = NULL;
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pwlArc = p;
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type = j->type;
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nuid = j->nuid;
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}
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/*--------------------------------------------------------------------------
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* Arc - initialize a new Arc with the same type and uid of
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* a given Arc and a given pwl arc
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*--------------------------------------------------------------------------
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*/
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inline
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Arc::Arc( arc_side side, long _nuid )
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{
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bezierArc = NULL;
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pwlArc = NULL;
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type = 0;
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setside( side );
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nuid = _nuid;
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}
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#endif /* __gluarc_h_ */
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