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A* -------------------------------------------------------------------
B* This file contains source code for the PyMOL computer program
C* copyright 1998-2000 by Warren Lyford Delano of DeLano Scientific. 
D* -------------------------------------------------------------------
E* It is unlawful to modify or remove this copyright notice.
F* -------------------------------------------------------------------
G* Please see the accompanying LICENSE file for further information. 
H* -------------------------------------------------------------------
I* Additional authors of this source file include:
Z* -------------------------------------------------------------------
#ifndef _H_Map
#define _H_Map

/* Map - a 3-D hash object for optimizing neighbor searches */


typedef struct { 
  PyMOLGlobals *G;
  float Div;
  float recipDiv;
  Vector3i Dim;
  int D1D2;
  Vector3i iMin,iMax;
  int *Head,*Link;
  int *EHead,*EList,*EMask;
  int NVert;
  int NEElem;
  Vector3f Max,Min;
  int group_id;
  int block_base;
} MapType;

typedef struct {
  PyMOLGlobals *G;
  int *Cache,*CacheLink,CacheStart;
  int block_base;
} MapCache;

#define MapBorder 2

MapType *MapNew(PyMOLGlobals *G,float range,float *vert,int nVert,float *extent);
MapType *MapNewCached(PyMOLGlobals *G,float range,float *vert,int nVert,float *extent,int group_id,int block_id);

MapType *MapNewFlagged(PyMOLGlobals *G,float range,float *vert,int nVert,float *extent,int *flag);
void MapSetupExpress(MapType *I);
void MapSetupExpressPerp(MapType *I, float *vert, float front);

void MapFree(MapType *I);

#define MapFirst(m,a,b,c) (m->Head + ((a) * m->D1D2) + ((b)*m->Dim[2]) + (c))

#define MapEStart(m,a,b,c) (m->EHead + ((a) * m->D1D2) + ((b)*m->Dim[2]) + (c))

#define MapNext(m,a) (*(m->Link+(a)))
void MapLocus(MapType *map,float *v,int *a,int *b,int *c);
int *MapLocusEStart(MapType *map,float *v);
int MapExclLocus(MapType *map,float *v,int *a,int *b,int *c);

#define MapCache(m,a) {(m)->Cache[a]=1;(m)->CacheLink[a]=(m)->CacheStart;(m)->CacheStart=a;}
#define MapCached(m,a) ((m)->Cache[a])

void MapCacheInit(MapCache *M,MapType *I,int group_id,int block_base);
void MapCacheReset(MapCache *M);
void MapCacheFree(MapCache *M,int group_id,int block_base);

float MapGetSeparation(PyMOLGlobals *G,float range,float *mx,float *mn,float *diagonal);
float MapGetDiv(MapType *I);
/* special routines for raytracing */

int MapInside(MapType *I,float *v,int *a,int *b,int *c);

int MapInsideXY(MapType *I,float *v,int *a,int *b,int *c); 
void MapSetupExpressXY(MapType *I,int n_vert);

void MapSetupExpressXYVert(MapType *I,float *vert,int n_vert);


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