--- ray/src/hd/rholo4.c	1997/12/11 17:40:04	3.12
+++ ray/src/hd/rholo4.c	1998/01/04 18:37:11	3.17
@@ -13,7 +13,7 @@ static char SCCSid[] = "$SunId$ SGI";
 #include <sys/uio.h>
 
 #ifndef HDSUF
-#define HDSUF	".hdisp"
+#define HDSUF	".hdi"
 #endif
 
 static int	inp_flags;
@@ -53,6 +53,9 @@ char	*dname;
 	if (readinp)
 		close(atoi(fd0));
 	close(atoi(fd1));
+				/* check if outside */
+	if (vdef(OBSTRUCTIONS) && vbool(OBSTRUCTIONS))
+		disp_result(DS_OUTSECT, 0, NULL);
 				/* write out hologram grids */
 	for (i = 0; hdlist[i] != NULL; i++)
 		disp_result(DS_ADDHOLO, sizeof(HDGRID), (char *)hdlist[i]);
@@ -124,7 +127,7 @@ int	block;
 		disp_result(DS_STARTIMM, 0, NULL);
 		bundle_set(BS_ADD, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD));
 		disp_result(DS_ENDIMM, 0, NULL);
-		disp_check(0);		/* hack -- delete usu. follows add */
+		disp_flush();
 		break;
 	case DR_ADJSET:		/* adjust calculation set members */
 		if (msg.nbytes % sizeof(PACKHEAD))
@@ -145,6 +148,34 @@ int	block;
 					/* send acknowledgement */
 		disp_result(DS_ACKNOW, 0, NULL);
 		return(disp_check(1));	/* block on following request */
+	case DR_KILL:		/* kill computation process(es) */
+		if (msg.nbytes)
+			error(INTERNAL, "bad DR_KILL from display process");
+		if (nprocs > 0)
+			done_rtrace();
+		else
+			error(WARNING, "no rtrace process to kill");
+		break;
+	case DR_RESTART:	/* restart computation process(es) */
+		if (msg.nbytes)
+			error(INTERNAL, "bad DR_RESTART from display process");
+		if (ncprocs > nprocs)
+			new_rtrace();
+		else if (nprocs > 0)
+			error(WARNING, "rtrace already runnning");
+		else
+			error(WARNING, "holodeck not open for writing");
+		break;
+	case DR_CLOBBER:	/* clobber holodeck */
+		if (msg.nbytes)
+			error(INTERNAL, "bad DR_CLOBBER from display process");
+		if (!force || !ncprocs)
+			error(WARNING, "request to clobber holodeck denied");
+		else {
+			error(WARNING, "clobbering holodeck contents");
+			hdclobber(NULL);
+		}
+		break;
 	case DR_SHUTDOWN:	/* shut down program */
 		if (msg.nbytes)
 			error(INTERNAL, "bad DR_SHUTDOWN from display process");