mesher.h

/*
 * 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.
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 * shall not be used in advertising or otherwise to promote the sale, use or
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 * Silicon Graphics, Inc.
 */

/*
 * mesher.h
 *
 */

#ifndef __glumesher_h_
#define __glumesher_h_

#include "hull.h"

class TrimRegion;
class Backend;
class Pool;
// struct GridTrimVertex;


class Mesher : virtual public TrimRegion, public Hull {
public:
                        Mesher( Backend & );
                        ~Mesher( void );
    void                init( unsigned int );
    void                mesh( void );

private:
    static const float  ZERO;
    Backend&            backend;

    Pool                p;
    unsigned int        stacksize;
    GridTrimVertex **   vdata;
    GridTrimVertex *    last[2];
    int                 itop;
    int                 lastedge;

    inline void         openMesh( void );
    inline void         swapMesh( void );
    inline void         closeMesh( void );
    inline int          isCcw( int );
    inline int          isCw( int );
    inline void         clearStack( void );
    inline void         push( GridTrimVertex * );
    inline void         pop( long );
    inline void         move( int, int );
    inline int          equal( int, int );
    inline void         copy( int, int );
    inline void         output( int );
    void                addUpper( void );
    void                addLower( void );
    void                addLast( void );
    void                finishUpper( GridTrimVertex * );
    void                finishLower( GridTrimVertex * );
};
#endif /* __glumesher_h_ */