# dynamic-contour-levels
--- plot.h.ORIG	Tue Oct 19 14:32:17 1999
+++ plot.h	Thu Dec  9 17:57:06 1999
@@ -131,7 +131,6 @@
 #define LEVELS_AUTO		0		/* How contour levels are set */
 #define LEVELS_INCREMENTAL	1		/* user specified start & incremnet */
 #define LEVELS_DISCRETE		2		/* user specified discrete levels */
-#define MAX_DISCRETE_LEVELS   30
 
 #define ANGLES_RADIANS	0
 #define ANGLES_DEGREES	1
--- set.c.ORIG	Thu Aug 19 15:36:35 1999
+++ set.c	Thu Dec  9 17:57:06 1999
@@ -44,6 +44,7 @@
 #include "stdfn.h"
 #include "setshow.h"
 #include "national.h"
+#include "alloc.h"
 
 #define DEF_FORMAT   "%g"	/* default format for tic mark labels */
 #define SIGNIF (0.01)		/* less than one hundredth of a tic mark */
@@ -198,7 +199,8 @@
 int contour_levels = 5;
 double zero = ZERO;		/* zero threshold, not 0! */
 int levels_kind = LEVELS_AUTO;
-double levels_list[MAX_DISCRETE_LEVELS];	/* storage for z levels to draw contours at */
+double *levels_list;	/* storage for z levels to draw contours at */
+int max_levels = 0;	/* contour level capacity, before enlarging */
 
 int dgrid3d_row_fineness = 10;
 int dgrid3d_col_fineness = 10;
@@ -611,6 +613,10 @@
 else if (almost_equals(c_token, MIN)) { AUTO |= 1;    ++c_token; } \
 else if (almost_equals(c_token, MAX)) { AUTO |= 2;    ++c_token; }
 
+    if (max_levels == 0)
+	levels_list = (double *)gp_alloc((max_levels = 5)*sizeof(double), 
+					 "contour levels");
+
     if (almost_equals(c_token, "ar$row")) {
 	c_token++;
 	set_arrow();
@@ -813,6 +819,10 @@
 		    if (!equals(c_token, ","))
 			int_error("expecting comma to separate discrete levels", c_token);
 		    c_token++;
+		    if (i == max_levels)
+			levels_list = gp_realloc(levels_list,
+					(max_levels += 10)*sizeof(double),
+					"contour levels");
 		    levels_list[i++] = real(const_express(&a));
 		}
 		contour_levels = i;
--- setshow.h.ORIG	Sat Oct  3 21:17:47 1998
+++ setshow.h	Thu Dec  9 17:57:06 1999
@@ -169,7 +169,7 @@
 extern int			contour_levels;
 extern double			zero; /* zero threshold, not 0! */
 extern int			levels_kind;
-extern double		levels_list[MAX_DISCRETE_LEVELS];
+extern double			*levels_list;
 
 extern int			dgrid3d_row_fineness;
 extern int			dgrid3d_col_fineness;