--- ray/src/gen/genblinds.c	1993/06/04 14:29:34	2.5
+++ ray/src/gen/genblinds.c	2003/02/22 02:07:23	2.9
@@ -1,9 +1,6 @@
-/* Copyright (c) 1986 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: genblinds.c,v 2.9 2003/02/22 02:07:23 greg Exp $";
 #endif
-
 /*
  *  genblind2.c - make some curved or flat venetian blinds.
  *
@@ -19,10 +16,11 @@ static char SCCSid[] = "$SunId$ LBL";
  */
 
 #include  <stdio.h>
+#include <stdlib.h>
 #include  <math.h>
 
-#define  PI		3.141592653589793
-#define  DELTA		5.  /*  MINIMAL SUSTAINED ANGLE IN DEGREES */
+#define  PI		3.14159265358979323846
+#define  DELTA		10.  /*  MINIMAL SUSTAINED ANGLE IN DEGREES */
 
 double  baseflat[4][3], baseblind[4][3][180];
 double  A[3],X[3];
@@ -67,7 +65,7 @@ char  *argv[];
 
  	/* HOW MANY ELEMENTARY SURFACES SHOULD BE CALCULATED ? */
 
-	nsurf = (theta / ((PI/180.)*DELTA));
+	nsurf = (theta / ((PI/180.)*DELTA)) + 1;
 
 	/* WHAT IS THE DEPTH OF THE ELEMENTARY SURFACES ? */