Fix 3D text depth setting. Also improves helix display and mousemove event handling

Author: BruceSherwood

labextension/vpython/src/glowcommlab.js

@@ -477,7 +477,7 @@ var attrsb = {'a':'userzoom', 'b':'userspin', 'c':'range', 'd':'autoscale', 'e':
               'p':'left', 'q':'right', 'r':'top', 's':'bottom', 't':'_cloneid',
               'u':'logx', 'v':'logy', 'w':'dot', 'x':'dot_radius', 
               'y':'markers', 'z':'legend', 'A':'label','B':'delta', 'C':'marker_color',
-              'D':'size_units', 'E':'userpan', 'F':'scroll', 'G':'choices'}
+              'D':'size_units', 'E':'userpan', 'F':'scroll', 'G':'choices', 'H':'depth'}
 
 // methods are X in {'m': '23X....'}
 var methods = {'a':'select', 'b':'pos', 'c':'start', 'd':'stop', 'f':'clear', // unused eghijklmnopvxyzCDFAB

vpython/vpython.py

@@ -97,7 +97,7 @@
           'right':'q', 'top':'r', 'bottom':'s', '_cloneid':'t',
           'logx':'u', 'logy':'v', 'dot':'w', 'dot_radius':'x',
           'markers':'y', 'legend':'z', 'label':'A', 'delta':'B', 'marker_color':'C',
-          'size_units':'D', 'userpan':'E', 'scroll':'F', 'choices':'G'}
+          'size_units':'D', 'userpan':'E', 'scroll':'F', 'choices':'G', 'depth':'H'}
 
 # methods are X in {'m': '23X....'}
 # pos is normally updated as an attribute, but for interval-based trails, it is updated (multiply) as a method
@@ -3979,7 +3979,7 @@ def depth(self, val): # sign issue ??
             if abs(val) < 0.01*self._height:
                 if val < 0: val = -0.01*self._height
                 else: val = 0.01*self._height
-            self._depth = value
+            self._depth = val
             self.addattr('depth')
 
     @property

vpython/vpython_libraries/glow.min.js

@@ -399,7 +399,7 @@
               'p':'left', 'q':'right', 'r':'top', 's':'bottom', 't':'_cloneid',
               'u':'logx', 'v':'logy', 'w':'dot', 'x':'dot_radius', 
               'y':'markers', 'z':'legend', 'A':'label','B':'delta', 'C':'marker_color',
-              'D':'size_units', 'E':'userpan', 'F':'scroll', 'G':'choices'}
+              'D':'size_units', 'E':'userpan', 'F':'scroll', 'G':'choices', 'H':'depth'}
 
 // methods are X in {'m': '23X....'}
 var methods = {'a':'select', 'b':'pos', 'c':'start', 'd':'stop', 'f':'clear', // unused eghijklmnopvxyzCDFAB

vpython/vpython_libraries/glowcomm.html

@@ -449,7 +449,7 @@ var attrsb = {'a':'userzoom', 'b':'userspin', 'c':'range', 'd':'autoscale', 'e':
               'p':'left', 'q':'right', 'r':'top', 's':'bottom', 't':'_cloneid',
               'u':'logx', 'v':'logy', 'w':'dot', 'x':'dot_radius', 
               'y':'markers', 'z':'legend', 'A':'label','B':'delta', 'C':'marker_color',
-              'D':'size_units', 'E':'userpan', 'F':'scroll', 'G':'choices'}
+              'D':'size_units', 'E':'userpan', 'F':'scroll', 'G':'choices', 'H':'depth'}
 
 // methods are X in {'m': '23X....'}
 var methods = {'a':'select', 'b':'pos', 'c':'start', 'd':'stop', 'f':'clear', // unused eghijklmnopvxyzCDFAB