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-/*
-** 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.
-*/
-
-/*
- * patch.h
- *
- * $Date: 2004/03/14 08:29:11 $ $Revision: 1.1.1.4 $
- * $Header: /cvs/xorg/xc/extras/ogl-sample/main/gfx/lib/glu/libnurbs/internals/patch.h,v 1.1.1.4 2004/03/14 08:29:11 eich 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_ */