Add marker controls.

data/data2.cf

@@ -29,11 +29,11 @@ datavar 1 mass
 datavar 2 nclump
 datavar 3 topnode
 datavar 4 treeaddr
+datavar 5 ringsize
 
 #  ``read kira data from file "data2.out"''
 kira data2.out
 
-#  ``load data for time 0 and report to user how many particles are in it''
 eval step 0
 eval every
 
@@ -48,3 +48,14 @@ eval psize 100
 eval cmap nclump.cmap
 eval color nclump exact -1
 
+# Turn center-of-mass nodes off,
+# draw ring markers for multiple stars,
+# choose marker radius from abs(semimajor axis) * 1.5
+eval kiractl nodes off
+eval kiractl rings on
+eval kiractl ringsize semimajor
+eval kiractl ringscale 1.5
+
+#  ``load data for time 0 and report to user how many particles are in it''
+eval step 0
+eval every