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/* |
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* octree.h - header file for routines using octrees. |
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*/ |
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#ifndef _RAD_OCTREE_H_ |
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#define _RAD_OCTREE_H_ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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#include "copyright.h" |
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|
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/* |
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* An octree is expressed as an integer which is either |
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* an index to eight other nodes, the empty tree, or an index |
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#define octti(ot) (((ot)&03777)<<3)/* octree index in block */ |
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#ifndef MAXOBLK |
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#ifdef BIGMEM |
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#define MAXOBLK 32767 /* maximum octree block */ |
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#else |
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#ifdef SMLMEM |
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#define MAXOBLK 4095 /* maximum octree block */ |
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#else |
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#define MAXOBLK 32767 /* maximum octree block */ |
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#endif |
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#endif |
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|
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#define O_HIT 1 /* intersection */ |
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#define O_IN 2 /* cube contained entirely */ |
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|
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#ifdef NOPROTO |
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|
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extern OCTREE octalloc(); |
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extern void octfree(); |
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extern void octdone(); |
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extern OCTREE combine(); |
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extern void culocate(); |
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extern void cucopy(); |
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extern int incube(); |
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|
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extern int readoct(); |
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|
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#else |
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extern OCTREE octalloc(void); |
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extern void octfree(OCTREE ot); |
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extern void octdone(void); |
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extern int readoct(char *fname, int load, CUBE *scene, char *ofn[]); |
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extern void readscene(FILE *fp, int objsiz); |
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extern void writescene(int firstobj, int nobjs, FILE *fp); |
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|
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|
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_OCTREE_H_ */ |
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