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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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/* SCCSid "$SunId$ SGI" */ |
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#ifndef HDMAX |
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#define HDMAX 128 /* maximum active holodeck sections */ |
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#endif |
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#ifndef int2 |
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#define int2 short |
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#endif |
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#ifndef int4 |
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#define int4 int |
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#endif |
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#define DCINF (unsigned)((1L<<16)-1) /* special value for infinity */ |
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#define DCLIN (unsigned)(1L<<11) /* linear depth limit */ |
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typedef struct { |
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BYTE r[2][2]; /* ray direction index */ |
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COLR v; /* value */ |
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unsigned int2 d; /* depth code */ |
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} RAYVAL; /* ray value (from second wall) */ |
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COLR v; /* color value */ |
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unsigned int2 d; /* depth code (from entry wall) */ |
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} RAYVAL; /* ray value */ |
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/* |
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* Walls are ordered: X0 X1 X2 WN |
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int fd; /* file descriptor */ |
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short dirty; /* beam index needs update to file */ |
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double tlin; /* linear range for depth encoding */ |
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FVECT wn[3]; /* wall normals (derived) */ |
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double wg[3]; /* wall grid multipliers (derived) */ |
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double wo[6]; /* wall offsets (derived) */ |
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FVECT wg[3]; /* wall grid vectors (derived) */ |
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double wo[6]; /* wall grid offsets (derived) */ |
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int wi[6]; /* wall super-indices (derived) */ |
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char *priv; /* pointer to private client data */ |
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BEAM **bl; /* beam pointers (memory cache) */ |
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int b; /* beam index */ |
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} HDBEAMI; /* holodeck beam index */ |
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#define nbeams(hp) (2*((hp)->wi[5]-1)) |
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#define nbeams(hp) (((hp)->wi[5]-1)<<1) |
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#define biglob(hp) ((hp)->bi) |
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#define blglob(hp) (*(hp)->bl) |
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extern long hdfiluse(), hdfilen(), hdallocfrag(); |
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extern double hdray(), hdinter(); |
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extern unsigned hdcode(); |
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extern int hdfilord(); |
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extern unsigned hdcachesize; /* target cache size (bytes) */ |
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extern unsigned long hdclock; /* holodeck system clock */ |
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extern HOLO *hdlist[HDMAX+1]; /* holodeck pointers (NULL term.) */ |
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extern float hd_depthmap[]; /* depth conversion map */ |
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extern int hdwg0[6]; /* wall grid 0 index */ |
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extern int hdwg1[6]; /* wall grid 1 index */ |
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#define hddepth(hp,dc) ( (dc) >= DCINF ? FHUGE : \ |
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(hp)->tlin * ( (dc) >= DCLIN ? \ |
