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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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/* SCCSid "$SunId$ SGI" */ |
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/* RCSid $Id$ */ |
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/* |
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* Quadtree data structures for holodeck display drivers. |
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*/ |
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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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#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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/* 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 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(); |
