trimregion.h

来自「mesa-6.5-minigui源码」· C头文件 代码 · 共 91 行

/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
**
** http://oss.sgi.com/projects/FreeB
**
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
**
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
**
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
*/

/*
 * trimregion.h
 *
 * $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
 * $Header: /cvs/mesa/Mesa/src/glu/sgi/libnurbs/internals/trimregion.h,v 1.1 2001/03/17 00:25:41 brianp Exp $
 */

#ifndef __glutrimregion_h_
#define __glutrimregion_h_

#include "trimline.h"
#include "gridline.h"
#include "uarray.h"

class Arc;
class Backend;

class TrimRegion {
public:
			TrimRegion();
    Trimline		left;
    Trimline		right;
    Gridline		top;
    Gridline		bot;
    Uarray		uarray;

    void		init( REAL );
    void		advance( REAL, REAL, REAL );
    void		setDu( REAL );
    void		init( long, Arc_ptr );
    void		getPts( Arc_ptr );
    void		getPts( Backend & );
    void		getGridExtent( TrimVertex *, TrimVertex * );
    void		getGridExtent( void );
    int			canTile( void );
private:
    REAL		oneOverDu;
};

inline void
TrimRegion::init( REAL vval ) 
{
    bot.vval = vval;
}

inline void
TrimRegion::advance( REAL topVindex, REAL botVindex, REAL botVval )
{
    top.vindex	= (long) topVindex;
    bot.vindex	= (long) botVindex;
    top.vval	= bot.vval;
    bot.vval	= botVval;
    top.ustart	= bot.ustart;
    top.uend	= bot.uend;
}
#endif /* __glutrimregion_h_ */