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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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* Quadtree data structures for holodeck display drivers. |
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*/ |
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#undef NOPROTO |
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#define NOPROTO 1 |
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#include "color.h" |
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#include "tonemap.h" |
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#include "rhdriver.h" |
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/* child ordering */ |
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#define DL 0 /* down left */ |
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#define DR 1 /* down right */ |
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#define UL 2 /* up left */ |
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extern struct rleaves { |
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float (*wp)[3]; /* world intersection point array */ |
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int4 *wd; /* world direction array */ |
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TMbright *brt; /* encoded brightness array */ |
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BYTE (*chr)[3]; /* encoded chrominance array */ |
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BYTE (*rgb)[3]; /* tone-mapped color array */ |
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extern RTREE qtrunk; /* trunk of quadtree */ |
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extern double qtDepthEps; /* epsilon to compare depths (z fraction) */ |
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extern int qtMinNodesiz; /* minimum node dimension (pixels) */ |
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extern int rayqleft; /* number of rays to queue before flush */ |
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extern int4 encodedir(); |
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extern double fdir2diff(), dir2diff(); |
