Final fixes for option definitions in Graph3d

lib/graph3d/Graph3d.js

@@ -11,7 +11,7 @@ var Range = require('./Range');
 var Settings = require('./Settings');
 var Validator = require("./../shared/Validator").default;
 var {printStyle} = require('./../shared/Validator');
-var {allOptions, configureOptions} = require('./options.js');
+var {allOptions} = require('./options.js');
 
 
 /// enumerate the available styles
@@ -24,9 +24,13 @@ Graph3d.STYLE = Settings.STYLE;
  *
  * Using 'undefined' directly achieves the same thing, but this is more
  * descriptive by describing the intent.
- */
+ *
+ * Value not used any more in code; this comment block now serves as reference.
+
 var autoByDefault = undefined;
 
+ */
+
 
 /**
  * Default values for option settings.
@@ -61,10 +65,8 @@ Graph3d.DEFAULTS = {
   dotSizeMinFraction: 0.5,	 // size of min-value dot as a fraction of dotSizeRatio	
   dotSizeMaxFraction: 2.5,	 // size of max-value dot as a fraction of dotSizeRatio	
 
-  showAnimationControls: autoByDefault,
   animationInterval    : 1000, // milliseconds
   animationPreload     : false,
-  animationAutoStart   : autoByDefault,
 
   axisColor        : '#4D4D4D',
   gridColor        : '#D3D3D3',
@@ -96,8 +98,6 @@ Graph3d.DEFAULTS = {
       }
   },
 
-  showLegend       : autoByDefault, // determined by graph style
-  backgroundColor  : autoByDefault,
 
   dataColor        : {
     fill       : '#7DC1FF',
@@ -111,6 +111,18 @@ Graph3d.DEFAULTS = {
      distance  : 1.7
   },
 
+
+/*
+  The following fields are 'auto by default', see above.
+  The explicit setting of the fields has been disabled, because the
+  Validator module can't handle 'undefined' as set value.
+
+  showAnimationControls: autoByDefault,
+  animationAutoStart   : autoByDefault,
+
+  showLegend       : autoByDefault, // determined by graph style
+  backgroundColor  : autoByDefault,
+
   xBarWidth : autoByDefault,
   yBarWidth : autoByDefault,
   valueMin  : autoByDefault,
@@ -124,6 +136,7 @@ Graph3d.DEFAULTS = {
   zMin      : autoByDefault,
   zMax      : autoByDefault,
   zStep     : autoByDefault
+*/
 };