knotvector.h

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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.
 *
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 * Software is furnished to do so, subject to the following conditions:
 *
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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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 */
 
/*
 * knotvector.h
 *
 */
 
#ifndef __gluknotvector_h_
#define __gluknotvector_h_
 
#include "types.h"
 
struct Knotvector { /* a knot vector */
            Knotvector( void );
            ~Knotvector( void );
    void        init( long, long, long, INREAL * );
    int         validate( void );
    void        show( const char * );
 
    long        order;      /* order of spline  */
    long        knotcount;  /* number of knots  */
    long        stride;     /* bytes between points */
    Knot *      knotlist;   /* global knot vector */
};
 
/* tolerance to test knot coincidence */
#define TOLERANCE       1.0e-5
 
inline int 
identical( Knot x, Knot y )
{
    return ((x-y) < TOLERANCE) ? 1 : 0;
}
#endif /* __gluknotvector_h_ */