ftp.nice.ch/pub/next/unix/graphics/rayshade.4.0.s.tar.gz#/rayshade.4.0/libobj/disc.h

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/*
 * disc.h
 *
 * Copyright (C) 1989, 1991, Craig E. Kolb
 * All rights reserved.
 *
 * This software may be freely copied, modified, and redistributed
 * provided that this copyright notice is preserved on all copies.
 *
 * You may not distribute this software, in whole or in part, as part of
 * any commercial product without the express consent of the authors.
 *
 * There is no warranty or other guarantee of fitness of this software
 * for any purpose.  It is provided solely "as is".
 *
 * $Id$
 *
 * $Log$
 */
#ifndef DISC_H
#define DISC_H

#define ObjDiscCreate(r,p,n)	ObjCreate((ObjRef)DiscCreate(r,p,n), \
					DiscMethods())

typedef struct disc {
	Float radius, d;		/* Radius squared, plane constant */
	Vector norm, pos;		/* Normal, center */
} Disc;

extern Disc	*DiscCreate();
extern Methods	*DiscMethods();
extern int	DiscIntersect(), DiscEnter(), DiscNormal();
extern void	DiscBounds(), DiscUV(), DiscStats();
extern char	*DiscName();

#endif /* DISC_H */

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