--- ray/src/hd/holo.h	1998/01/07 21:27:29	3.14
+++ ray/src/hd/holo.h	1998/11/09 17:10:53	3.17
@@ -1,4 +1,4 @@
-/* Copyright (c) 1997 Silicon Graphics, Inc. */
+/* Copyright (c) 1998 Silicon Graphics, Inc. */
 
 /* SCCSid "$SunId$ SGI" */
 
@@ -14,21 +14,19 @@
 #ifndef HDMAX
 #define HDMAX		128	/* maximum active holodeck sections */
 #endif
-#ifndef int2
-#define int2	short
+
+#ifndef MAXDIRSE
+#define MAXDIRSE	32	/* maximum seeks per directory write */
 #endif
-#ifndef int4
-#define int4	int
-#endif
 
 #define DCINF	(unsigned)((1L<<16)-1)	/* special value for infinity */
 #define DCLIN	(unsigned)(1L<<11)	/* linear depth limit */
 
 typedef struct {
 	BYTE 	r[2][2];	/* ray direction index */
-	COLR 	v;		/* value */
-	unsigned int2	d;	/* depth code */
-} RAYVAL;		/* ray value (from second wall) */
+	COLR 	v;		/* color value */
+	unsigned int2	d;	/* depth code (from entry wall) */
+} RAYVAL;		/* ray value */
 
 /*
  * Walls are ordered:		X0	X1	X2	WN
@@ -71,7 +69,10 @@ typedef struct holo {
 	FVECT	xv[3];		/* side vectors (second) */
 	int2	grid[3];	/* grid resolution (third) */
 	int	fd;		/* file descriptor */
-	short	dirty;		/* beam index needs update to file */
+	struct {
+		int	s, n;		/* dirty section start, length */
+	} dirseg[MAXDIRSE+1];	/* dirty beam index segments */
+	short	dirty;		/* number of dirty segments */
 	double	tlin;		/* linear range for depth encoding */
 	FVECT	wg[3];		/* wall grid vectors (derived) */
 	double	wo[6];		/* wall grid offsets (derived) */
@@ -92,8 +93,8 @@ typedef struct {
 
 #define bnrays(hp,i)	((hp)->bl[i]!=NULL ? (hp)->bl[i]->nrm : (hp)->bi[i].nrd)
 
-#define hdflush(hp)	(hdfreebeam(hp,0) && hdsync(hp,0))
-#define hdclobber(hp)	(hdkillbeam(hp,0) && hdsync(hp,0))
+#define hdflush(hp)	(hdfreebeam(hp,0), hdsync(hp,0))
+#define hdclobber(hp)	(hdkillbeam(hp,0), hdsync(hp,0))
 
 extern HOLO	*hdinit(), *hdalloc();
 extern BEAM	*hdgetbeam();