--- ray/src/hd/rhdisp3.c	2003/07/21 22:30:18	3.14
+++ ray/src/hd/rhdisp3.c	2018/01/24 04:39:52	3.17
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rhdisp3.c,v 3.14 2003/07/21 22:30:18 schorsch Exp $";
+static const char	RCSid[] = "$Id: rhdisp3.c,v 3.17 2018/01/24 04:39:52 greg Exp $";
 #endif
 /*
  * Holodeck beam support for display process
@@ -7,7 +7,6 @@ static const char	RCSid[] = "$Id: rhdisp3.c,v 3.14 200
 
 #include "rholo.h"
 #include "rhdisp.h"
-#include "view.h"
 
 struct cellist {
 	GCOORD	*cl;
@@ -38,8 +37,7 @@ int	bi;
 		pf[i] = 0.5*(cp[0][i] + cp[2][i]);
 	sf2 = 0.25*dist2(cp[0], cp[2]);	/* compute half diagonal length */
 	for (i = 0; i < 4; i++) {	/* compute visible quad */
-		viewloc(ip[i], vp, cp[i]);
-		if (ip[i][2] < 0.) {
+		if (viewloc(ip[i], vp, cp[i]) <= 0) {
 			af = 0;
 			goto getback;
 		}
@@ -65,8 +63,7 @@ getback:
 		pb[i] = 0.5*(cp[0][i] + cp[2][i]);
 	sb2 = 0.25*dist2(cp[0], cp[2]);	/* compute half diagonal length */
 	for (i = 0; i < 4; i++) {	/* compute visible quad */
-		viewloc(ip[i], &vrev, cp[i]);
-		if (ip[i][2] < 0.) {
+		if (viewloc(ip[i], &vrev, cp[i]) <= 0) {
 			ab = 0;
 			goto finish;
 		}
@@ -304,8 +301,10 @@ memerr:
 }
 
 
-gridlines(f)			/* run through holodeck section grid lines */
-int	(*f)();
+extern void
+gridlines(			/* run through holodeck section grid lines */
+	void	(*f)(FVECT wp[2])
+)
 {
 	register int	hd, w, i;
 	int	g0, g1;