quilt.h

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/*
 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice including the dates of first publication and
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 * http://oss.sgi.com/projects/FreeB/
 * shall be included in all copies or substantial portions of the Software.
 *
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/*
 * quilt.h
 *
 * $Date: 2001/08/07 17:34:11 $ $Revision: 1.2 $
 * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/quilt.h,v 1.2 2001/08/07 17:34:11 brianp Exp $
 */

#ifndef __gluquilt_h_
#define __gluquilt_h_

#include "defines.h"
#include "bufpool.h"
#include "types.h"

class Backend;
class Mapdesc;
class Flist;
struct Knotvector;

/* constants for memory allocation of NURBS to Bezier conversion */ 
#define	MAXDIM 		2

struct Quiltspec { /* a specification for a dimension of a quilt */
    int			stride;		/* words between points */
    int			width;		/* number of segments */
    int			offset;		/* words to first point */
    int			order;		/* order */
    int			index;		/* current segment number */
    int			bdry[2];	/* boundary edge flag */
    REAL  		step_size;
    Knot *		breakpoints;
};

typedef Quiltspec *Quiltspec_ptr;
    
class Quilt : public PooledObj { /* an array of bezier patches */
public:
    			Quilt( Mapdesc * );
    Mapdesc *		mapdesc;	/* map descriptor */
    REAL *		cpts;		/* control points */
    Quiltspec		qspec[MAXDIM];	/* the dimensional data */
    Quiltspec_ptr	eqspec;		/* qspec trailer */
    Quilt		*next;		/* next quilt in linked list */
			
public:
    void		deleteMe( Pool& );
    void		toBezier( Knotvector &, INREAL *, long  );
    void		toBezier( Knotvector &, Knotvector &, INREAL *, long  );
    void		select( REAL *, REAL * );
    int			getDimension( void ) { return eqspec - qspec; }
    void 		download( Backend & );
    void		downloadAll( REAL *, REAL *, Backend & );
    int 		isCulled( void );
    void		getRange( REAL *, REAL *, Flist&, Flist & );
    void		getRange( REAL *, REAL *, int, Flist & );
    void		getRange( REAL *, REAL *, Flist&  );
    void		findRates( Flist& slist, Flist& tlist, REAL[2] );
    void		findSampleRates( Flist& slist, Flist& tlist );
    void		show();
};

typedef class Quilt *Quilt_ptr;

#endif /* __gluquilt_h_ */