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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,
* 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.
*/
/*
* patch.h
*
* $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
* $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/patch.h,v 1.1 2001/03/17 00:25:41 brianp Exp $
*/
#ifndef __glupatch_h_
#define __glupatch_h_
#include "types.h"
#include "defines.h"
class Quilt;
class Mapdesc;
struct Pspec {
REAL range[3];
REAL sidestep[2];
REAL stepsize;
REAL minstepsize;
int needsSubdivision;
};
struct Patchspec : public Pspec {
int order;
int stride;
void clamp( REAL );
void getstepsize( REAL );
void singleStep( void );
};
class Patch {
public:
friend class Subdivider;
friend class Quilt;
friend class Patchlist;
Patch( Quilt *, REAL*, REAL *, Patch * );
Patch( Patch &, int, REAL, Patch * );
void bbox( void );
void clamp( void );
void getstepsize( void );
int cullCheck( void );
int needsSubdivision( int );
int needsSamplingSubdivision( void );
int needsNonSamplingSubdivision( void );
int get_uorder() {return pspec[0].order;}
int get_vorder() {return pspec[1].order;}
private:
Mapdesc* mapdesc;
Patch* next;
int cullval;
int notInBbox;
int needsSampling;
REAL cpts[MAXORDER*MAXORDER*MAXCOORDS]; //culling pts
REAL spts[MAXORDER*MAXORDER*MAXCOORDS]; //sampling pts
REAL bpts[MAXORDER*MAXORDER*MAXCOORDS]; //bbox pts
Patchspec pspec[2];
void checkBboxConstraint( void );
REAL bb[2][MAXCOORDS];
};
#endif /* __glupatch_h_ */
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