--- ray/src/hd/rhd_qtree.c	1997/12/31 09:06:54	3.16
+++ ray/src/hd/rhd_qtree.c	1998/08/10 18:39:46	3.18
@@ -1,4 +1,4 @@
-/* Copyright (c) 1997 Silicon Graphics, Inc. */
+/* Copyright (c) 1998 Silicon Graphics, Inc. */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ SGI";
@@ -29,6 +29,8 @@ double	qtDepthEps = .05;	/* epsilon to compare depths 
 int	qtMinNodesiz = 2;	/* minimum node dimension (pixels) */
 struct rleaves	qtL;		/* our pile of leaves */
 
+int	rayqleft = 0;		/* rays left to queue before flush */
+
 static int4	falleaves;	/* our list of fallen leaves */
 
 #define composted(li)	(qtL.bl <= qtL.tl ? \
@@ -330,9 +332,9 @@ dropit:
 }
 
 
-dev_value(c, p, v)		/* add a pixel value to our quadtree */
+dev_value(c, d, p)		/* add a pixel value to our quadtree */
 COLR	c;
-FVECT	p, v;
+FVECT	d, p;
 {
 	register int	li;
 	int	mapit;
@@ -351,11 +353,18 @@ FVECT	p, v;
 			qtCompost(LFREEPCT);
 		mapit = 0;			/* we'll map it later */
 	}
-	VCOPY(qtL.wp[li], p);
-	qtL.wd[li] = encodedir(v);
+	if (p == NULL)
+		VSUM(qtL.wp[li], odev.v.vp, d, FHUGE);
+	else
+		VCOPY(qtL.wp[li], p);
+	qtL.wd[li] = encodedir(d);
 	tmCvColrs(&qtL.brt[li], qtL.chr[li], c, 1);
-	if (putleaf(li, 1) && mapit)
-		tmMapPixels(qtL.rgb+li, qtL.brt+li, qtL.chr+li, 1);
+	if (putleaf(li, 1)) {
+		if (mapit)
+			tmMapPixels(qtL.rgb+li, qtL.brt+li, qtL.chr+li, 1);
+		if (--rayqleft == 0)
+			dev_flush();		/* flush output */
+	}
 }