--- ray/src/util/rpiece.c	1995/11/30 09:26:20	2.31
+++ ray/src/util/rpiece.c	1997/05/28 17:22:52	2.34
@@ -47,6 +47,11 @@ char *argv[];
 #define guard_io()	0
 #define unguard()	0
 #endif
+
+#ifndef linux
+extern char  *sys_errlist[];
+#endif
+
 				/* rpict command */
 char  *rpargv[128] = {"rpict", "-S", "1"};
 int  rpargc = 3;
@@ -193,7 +198,6 @@ int  fd;
 int  ltyp;
 {
 	static struct flock  fls;	/* static so initialized to zeroes */
-	extern char  *sys_errlist[];
 
 	fls.l_type = ltyp;
 	if (fcntl(fd, F_SETLKW, &fls) < 0) {
@@ -415,6 +419,11 @@ rpiece()			/* render picture piece by piece */
 		pview.horiz = ourview.horiz / hmult;
 		pview.vert = ourview.vert / vmult;
 		break;
+	case VT_CYL:
+		pview.horiz = ourview.horiz / hmult;
+		pview.vert = 2.*180./PI*atan(
+				tan(PI/180./2.*ourview.vert)/vmult );
+		break;
 	case VT_HEM:
 		pview.horiz = 2.*180./PI*asin(
 				sin(PI/180./2.*ourview.horiz)/hmult );
@@ -428,8 +437,8 @@ rpiece()			/* render picture piece by piece */
 	}
 					/* render each piece */
 	while (nextpiece(&xorg, &yorg)) {
-		pview.hoff = ourview.hoff + xorg - 0.5*(hmult-1);
-		pview.voff = ourview.voff + yorg - 0.5*(vmult-1);
+		pview.hoff = ourview.hoff*hmult + xorg - 0.5*(hmult-1);
+		pview.voff = ourview.voff*vmult + yorg - 0.5*(vmult-1);
 		fputs(VIEWSTR, torp);
 		fprintview(&pview, torp);
 		putc('\n', torp);
@@ -522,6 +531,10 @@ int  xpos, ypos;
 	if (fcntl(outfd, F_SETLKW, &fls) < 0)
 		filerr("lock");
 #endif
+	if (verbose) {				/* notify caller */
+		printf("%d %d done\n", xpos, ypos);
+		fflush(stdout);
+	}
 	if (syncfp != NULL) {			/* record what's been done */
 		sflock(F_WRLCK);
 		fseek(syncfp, 0L, 2);		/* append index */
@@ -530,10 +543,6 @@ int  xpos, ypos;
 				/*** Unlock not necessary, since
 		sflock(F_UNLCK);	_exit() or nextpiece() is next ***/
 	}
-	if (verbose) {				/* notify caller */
-		printf("%d %d done\n", xpos, ypos);
-		fflush(stdout);
-	}
 	if (pid == -1)		/* didn't fork or fork failed */
 		return(0);
 	_exit(0);		/* else exit child process (releasing locks) */
@@ -543,8 +552,6 @@ int  xpos, ypos;
 filerr(t)			/* report file error and exit */
 char  *t;
 {
-	extern char  *sys_errlist[];
-
 	fprintf(stderr, "%s: %s error on file \"%s\": %s\n",
 			progname, t, outfile, sys_errlist[errno]);
 	_exit(1);