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- /****************************************************************************
- * octree.h
- *
- * Oct-tree routine prototypes. Use by Radiosity calculation routies.
- *
- * Implemented by and (c) 1994 Jim McElhiney, mcelhiney@acm.org or cserve 71201,1326
- * All standard POV distribution rights granted. All other rights reserved.
- * from Persistence of Vision(tm) Ray Tracer
- * Copyright 1996,1999 Persistence of Vision Team
- *---------------------------------------------------------------------------
- * NOTICE: This source code file is provided so that users may experiment
- * with enhancements to POV-Ray and to port the software to platforms other
- * than those supported by the POV-Ray Team. There are strict rules under
- * which you are permitted to use this file. The rules are in the file
- * named POVLEGAL.DOC which should be distributed with this file.
- * If POVLEGAL.DOC is not available or for more info please contact the POV-Ray
- * Team Coordinator by email to team-coord@povray.org or visit us on the web at
- * http://www.povray.org. The latest version of POV-Ray may be found at this site.
- *
- * This program is based on the popular DKB raytracer version 2.12.
- * DKBTrace was originally written by David K. Buck.
- * DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
- *
- *************************************************************************/
-
- #ifndef OCTREE_H
- #define OCTREE_H
-
-
- /*****************************************************************************
- * Global preprocessor defines
- ******************************************************************************/
-
- #define OT_BIAS 10000000.
-
- #define MAX3(a,b,c) ( ((a)>(b)) ? max((a),(c)) : max((b),(c)) )
-
-
- /*****************************************************************************
- * Global typedefs
- ******************************************************************************/
-
- typedef struct ot_block_struct OT_BLOCK;
- typedef struct ot_id_struct OT_ID;
- typedef struct ot_node_struct OT_NODE;
-
- /* Each node in the oct-tree has a (possibly null) linked list of these
- data blocks off it. */
- struct ot_block_struct
- {
- OT_BLOCK *next;
- VECTOR Point, S_Normal;
- float drdx, dgdx, dbdx, drdy, dgdy, dbdy, drdz, dgdz, dbdz;
- RGB Illuminance;
- float Harmonic_Mean_Distance, Nearest_Distance;
- VECTOR To_Nearest_Surface;
- short Bounce_Depth;
- };
-
- /* This is the information necessary to name an oct-tree node. */
- struct ot_id_struct
- {
- long x, y, z;
- long Size;
- };
-
- /* These are the structures that make up the oct-tree itself, known as nodes */
- struct ot_node_struct
- {
- OT_ID Id;
- OT_BLOCK *Values;
- OT_NODE *Kids[8];
- };
-
-
- /*****************************************************************************
- * Global variables
- ******************************************************************************/
-
-
-
- /*****************************************************************************
- * Global functions
- ******************************************************************************/
-
- void ot_ins (OT_NODE **root, OT_BLOCK *new_block, OT_ID *new_id);
- void ot_list_insert (OT_BLOCK **list_ptr, OT_BLOCK *item);
- void ot_newroot (OT_NODE **root_ptr);
- long ot_dist_traverse (OT_NODE *subtree, VECTOR point, int bounce_depth, \
- long (*func)(OT_BLOCK *block, void *handle1), void *handle2);
- long ot_point_in_node (VECTOR point, OT_ID *node);
- void ot_index_sphere (VECTOR point, DBL radius, OT_ID *id);
- void ot_index_box (VECTOR min_point, VECTOR max_point, OT_ID *id);
- void ot_parent (OT_ID *dad, OT_ID *kid);
- long ot_save_tree (OT_NODE *rootptr, FILE *fd);
- long ot_write_block (OT_BLOCK *bl, void * handle);
- long ot_free_tree (OT_NODE **ppRoot);
- long ot_read_file (FILE * fd);
-
-
- /* a trunc function which always returns the floor integer */
- long Trunc (DBL value);
-
-
-
- #endif
-