/*
 * blob.h
 *
 * Copyright (C) 1990, 1991, Mark Polipec, 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: blob.h,v 2.1 1992/06/02 14:11:20 mcgregor Exp mcgregor $
 *
 * $Log: blob.h,v $
 * Revision 2.1  1992/06/02  14:11:20  mcgregor
 * Installed the individual metaball surface support.  A step up from the
 * individual color specification support.  The structures may be further
 * enhanced by allowing them to refer to an individual, or unique implemetation
 * of a surface.
 *
 * Revision 1.1  1992/04/27  20:18:16  mcgregor
 * Initial revision
 *
 * Revision 4.0  91/07/17  14:36:12  kolb
 * Initial version.
 * 
 */
#ifndef BLOB_H
#define BLOB_H

#define GeomBlobCreate(s,t,m,n) GeomCreate((GeomRef)BlobCreate(s,t,m,n), BlobMethods())  /* s == surface; t == treshold; m == metalist; n == nr of points. */

#define R_START 1
#define R_END   0

#define GOOD 1
/*
 * Blob
 */
typedef struct {
  Float red, green, blue;
} MColor;                /* metaball's individual color spec struct. */

typedef struct {
	Float rs;	/* radius */
	Float c4;	/* coeefficient */
	Float c2;	/* coeefficient */
	Float c0;	/* coeefficient */
	Float x;	/* x position */
	Float y;	/* y position */
	Float z;	/* z position */
	Surface *surf;   /* metaball's individual surface */
	/*MColor mcolor;*/  /* Color of the metaball, if provided. */
} MetaVector;   /* Details of the metaball */

typedef struct {
	int type,pnt;
	Float bound;
	Float c[5];
} MetaInt;

typedef struct {
  Surface *surf;        /* Pointer to surface of the blob */
  int instance;         /* instance count of the blob; an index value */
  Float T;		/* Threshold   */
  int num;		/* number of points */
  int MColor_Flag;      /* TRUE ==> blob has multiple colors active */
  MetaVector *list;	/* list of points */
  MetaInt *ilist, **iarr;
} Blob;

typedef struct MetaList {
	MetaVector mvec;
	struct MetaList *next;
} MetaList;

/* Declarations of external references for Blob ops. */
/*      External function ref.s */
extern int	BlobIntersect(), BlobNormal();
extern void	BlobBounds(), BlobStats();
extern Blob	*BlobCreate();
extern char	*BlobName();
extern Methods	*BlobMethods();

/*      External or Global storage. */
extern Surface init_surf;    /* initial surface parameters: input file */

#endif /* BLOB_H */