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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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#ifndef MAXDIRSE |
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#define MAXDIRSE 32 /* maximum seeks per directory write */ |
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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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FVECT xv[3]; /* side vectors (second) */ |
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int2 grid[3]; /* grid resolution (third) */ |
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int fd; /* file descriptor */ |
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short dirty; /* beam index needs update to file */ |
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struct { |
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int s, n; /* dirty section start, length */ |
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} dirseg[MAXDIRSE+1]; /* dirty beam index segments */ |
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short dirty; /* number of dirty segments */ |
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double tlin; /* linear range for depth encoding */ |
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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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#define bnrays(hp,i) ((hp)->bl[i]!=NULL ? (hp)->bl[i]->nrm : (hp)->bi[i].nrd) |
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#define hdflush(hp) (hdfreebeam(hp,0) && hdsync(hp,0)) |
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#define hdclobber(hp) (hdkillbeam(hp,0) && hdsync(hp,0)) |
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#define hdflush(hp) (hdfreebeam(hp,0), hdsync(hp,0)) |
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#define hdclobber(hp) (hdkillbeam(hp,0), hdsync(hp,0)) |
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extern HOLO *hdinit(), *hdalloc(); |
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extern BEAM *hdgetbeam(); |
