| /* |
| * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) |
| * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice including the dates of first publication and |
| * either this permission notice or a reference to |
| * http://oss.sgi.com/projects/FreeB/ |
| * shall be included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF |
| * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * Except as contained in this notice, the name of Silicon Graphics, Inc. |
| * shall not be used in advertising or otherwise to promote the sale, use or |
| * other dealings in this Software without prior written authorization from |
| * Silicon Graphics, Inc. |
| */ |
| |
| /* |
| * arc.h |
| * |
| * $Date: 2012/03/29 17:22:17 $ $Revision: 1.1.1.1 $ |
| * $Header: /cvs/bao-parsec/pkgs/libs/mesa/src/src/glu/sgi/libnurbs/internals/arc.h,v 1.1.1.1 2012/03/29 17:22:17 uid42307 Exp $ |
| */ |
| |
| #ifndef __gluarc_h_ |
| #define __gluarc_h_ |
| |
| #include "myassert.h" |
| #include "bufpool.h" |
| #include "mystdio.h" |
| #include "types.h" |
| #include "pwlarc.h" |
| #include "trimvertex.h" |
| |
| class Bin; |
| class Arc; |
| struct BezierArc; |
| |
| typedef class Arc *Arc_ptr; |
| |
| enum arc_side { arc_none = 0, arc_right, arc_top, arc_left, arc_bottom }; |
| |
| |
| class Arc: public PooledObj { /* an arc, in two list, the trim list and bin */ |
| |
| public: |
| static const int bezier_tag; |
| static const int arc_tag; |
| static const int tail_tag; |
| Arc_ptr prev; /* trim list pointer */ |
| Arc_ptr next; /* trim list pointer */ |
| Arc_ptr link; /* bin pointers */ |
| BezierArc * bezierArc; /* associated bezier arc */ |
| PwlArc * pwlArc; /* associated pwl arc */ |
| long type; /* curve type */ |
| long nuid; |
| |
| inline Arc( Arc *, PwlArc * ); |
| inline Arc( arc_side, long ); |
| |
| Arc_ptr append( Arc_ptr ); |
| int check( void ); |
| int isMonotone( void ); |
| int isDisconnected( void ); |
| int numpts( void ); |
| void markverts( void ); |
| void getextrema( Arc_ptr[4] ); |
| void print( void ); |
| void show( void ); |
| void makeSide( PwlArc *, arc_side ); |
| inline int isTessellated() { return pwlArc ? 1 : 0; } |
| inline long isbezier() { return type & bezier_tag; } |
| inline void setbezier() { type |= bezier_tag; } |
| inline void clearbezier() { type &= ~bezier_tag; } |
| inline long npts() { return pwlArc->npts; } |
| inline TrimVertex * pts() { return pwlArc->pts; } |
| inline REAL * tail() { return pwlArc->pts[0].param; } |
| inline REAL * head() { return next->pwlArc->pts[0].param; } |
| inline REAL * rhead() { return pwlArc->pts[pwlArc->npts-1].param; } |
| inline long ismarked() { return type & arc_tag; } |
| inline void setmark() { type |= arc_tag; } |
| inline void clearmark() { type &= (~arc_tag); } |
| inline void clearside() { type &= ~(0x7 << 8); } |
| inline void setside( arc_side s ) { clearside(); type |= (((long)s)<<8); } |
| inline arc_side getside() { return (arc_side) ((type>>8) & 0x7); } |
| inline int getitail() { return type & tail_tag; } |
| inline void setitail() { type |= tail_tag; } |
| inline void clearitail() { type &= (~tail_tag); } |
| }; |
| |
| /*-------------------------------------------------------------------------- |
| * Arc - initialize a new Arc with the same type and uid of |
| * a given Arc and a given pwl arc |
| *-------------------------------------------------------------------------- |
| */ |
| |
| inline |
| Arc::Arc( Arc *j, PwlArc *p ) |
| { |
| bezierArc = NULL; |
| pwlArc = p; |
| type = j->type; |
| nuid = j->nuid; |
| } |
| |
| /*-------------------------------------------------------------------------- |
| * Arc - initialize a new Arc with the same type and uid of |
| * a given Arc and a given pwl arc |
| *-------------------------------------------------------------------------- |
| */ |
| |
| inline |
| Arc::Arc( arc_side side, long _nuid ) |
| { |
| bezierArc = NULL; |
| pwlArc = NULL; |
| type = 0; |
| setside( side ); |
| nuid = _nuid; |
| } |
| |
| #endif /* __gluarc_h_ */ |