trimline.h

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/*
 * 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,
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 * 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
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 */
 
/*
 * trimline.h
 *
 */
 
#ifndef __glutrimline_h_
#define __glutrimline_h_
 
class Arc;
class Backend;
 
//#include "trimvertex.h"
#include "jarcloc.h"
 
 
class Trimline {
private:
    TrimVertex**    pts;    
    long        numverts;
    long        i;
    long        size;
    Jarcloc     jarcl;
    TrimVertex      t, b;
    TrimVertex      *tinterp, *binterp;
    void        reset( void ) { numverts = 0; }
    inline void     grow( long );
    inline void     swap( void );
    inline void     append( TrimVertex * );
    static long     interpvert( TrimVertex *, TrimVertex *, TrimVertex *, REAL );
 
 
 
public:
            Trimline();
            ~Trimline();
    void        init( TrimVertex * );
    void        init( long, Arc_ptr, long );
    void        getNextPt( void );
    void        getPrevPt( void );
    void        getNextPts( REAL, Backend & );
    void        getPrevPts( REAL, Backend & );
    void        getNextPts( Arc_ptr );
    void        getPrevPts( Arc_ptr );
    inline TrimVertex * next( void );
    inline TrimVertex * prev( void ); 
    inline TrimVertex * first( void );
    inline TrimVertex * last( void );
};
 
inline TrimVertex *
Trimline::next( void ) 
{
    if( i < numverts) return pts[i++]; else return 0; 
} 
 
inline TrimVertex *
Trimline::prev( void ) 
{
    if( i >= 0 ) return pts[i--]; else return 0; 
} 
 
inline TrimVertex *
Trimline::first( void ) 
{
    i = 0; return pts[i]; 
}
 
inline TrimVertex *
Trimline::last( void ) 
{
    i = numverts; return pts[--i]; 
}  
#endif /* __glutrimline_h_ */