--- ray/src/hd/rhd_qtree.h	1997/11/20 18:03:43	3.2
+++ ray/src/hd/rhd_qtree.h	2005/01/07 20:33:02	3.18
@@ -1,58 +1,80 @@
-/* Copyright (c) 1997 Silicon Graphics, Inc. */
-
-/* SCCSid "$SunId$ SGI" */
-
+/* RCSid $Id: rhd_qtree.h,v 3.18 2005/01/07 20:33:02 greg Exp $ */
 /*
  * Quadtree data structures for holodeck display drivers.
  */
+#ifndef _RAD_RHD_QTREE_H_
+#define _RAD_RHD_QTREE_H_
 
+#include "color.h"
 #include "tonemap.h"
 #include "rhdriver.h"
-				/* quantity of leaves to free at a time */
-#ifndef LFREEPCT
-#define	LFREEPCT	15
+
+#ifdef __cplusplus
+extern "C" {
 #endif
-				/* child ordering */
+
 #define	DL		0		/* down left */
 #define	DR		1		/* down right */
 #define	UL		2		/* up left */
 #define	UR		3		/* up right */
 
-#define	BRF(i)		(1<<(i))	/* branch flag bit */
-#define CHF(i)		(0x10<<(i))	/* change flag bit */
-#define	CHBRF(i)	(0x11<<(i))	/* changed branch flags */
-#define CH_ANY		0xf0		/* flags for any change */
+#define	BRF(i)		(0x1<<(i))	/* branch flag bit */
+#define LFF(i)		(0x10<<(i))	/* leaf flag bit */
+#define CHF(i)		(0x100<<(i))	/* change flag bit */
+#define	CHBRF(i)	(0x101<<(i))	/* changed branch bit */
+#define CHLFF(i)	(0x110<<(i))	/* changed leaf bit */
+#define BR_ANY		0xf		/* flags for any branches */
+#define LF_ANY		0xf0		/* flags for any leaves */
+#define CH_ANY		0xf00		/* flags for any change */
 
-typedef struct {
-	float		wp[3];		/* world intersection point */
-	TMbright	brt;		/* encoded brightness (LogY) */
-	BYTE		chr[3];		/* encoded chrominance (RGB) */
-}	RLEAF;			/* recorded ray (leaf) value */
-
 typedef struct rtree {
-	short	flgs;			/* branch flags */
+	short	flgs;			/* content flags (defined above) */
 	union {
 		struct rtree	*b;		/* if branch */
-		RLEAF	*l;			/* if leaf */
+		int	li;			/* if leaf */
 	} k[4];				/* children */
 }	RTREE;
 
+extern struct rleaves {
+	float		(*wp)[3];	/* world intersection point array */
+	int32		*wd;		/* world direction array */
+	TMbright	*brt;		/* encoded brightness array */
+	BYTE		(*chr)[3];	/* encoded chrominance array */
+	BYTE		(*rgb)[3];	/* tone-mapped color array */
+	int		nl;		/* count of leaves in our pile */
+	int		bl, tl;		/* bottom and top (next) leaf index */
+	int		tml;		/* next leaf needing tone-mapping */
+	char		*base;		/* base of allocated memory */
+}	qtL;			/* our pile of leaves */
+
+#define	is_stump(t)	(!((t)->flgs & (BR_ANY|LF_ANY)))
+
 extern RTREE	qtrunk;		/* trunk of quadtree */
 extern double	qtDepthEps;	/* epsilon to compare depths (z fraction) */
 extern int	qtMinNodesiz;	/* minimum node dimension (pixels) */
 
-extern RLEAF	*qtFindLeaf();
+extern int	rayqleft;	/* number of rays to queue before flush */
 
+extern TMstruct	*tmGlobal;	/* global tone-mapping structure */
 
-/************************************************************************
- * These driver support routines implement the dev_value() call, but
- * require the following callbacks:
+/*
+extern int32	encodedir();
+extern double	fdir2diff(), dir2diff();
+*/
 
-dev_paintr(rgb, x0, y0, x1, y1)	: paint a rectangle
-BYTE	rgb[3];			: rectangle color
-int	x0, y0, x1, y1;		: rectangle boundaries
+	/* rhd_qtree.c */
+extern int qtAllocLeaves(register int n);
+extern void qtFreeLeaves(void);
+extern int qtCompost(int pct);
+extern void qtReplant(void);
+extern int qtFindLeaf(int x, int y);
+extern int qtMapLeaves(int redo);
+	/* rhd_qtree2c.c rhd_qtree2r.c */
+extern void qtRedraw(int x0, int y0, int x1, int y1);
+extern void qtUpdate(void);
 
-Draws an open rectangle between [x0,x1) and [y0,y1) with the color rgb.
-This function is called many times by qtUpdate(), qtRedraw() and qtReplant().
+#ifdef __cplusplus
+}
+#endif
+#endif /* _RAD_RHD_QTREE_H_ */
 
- ************************************************************************/