• all parent node messages are inherited
  
• see reset method for default settings
  
• uncrecognized messages sent to a ygGrid node will be filtered and sent to the current "node"
  

constructor ygGrid

1 create ygNode message filter
2 create grid geosets

destructor ~ygGrid

method reset

1 set the draw flag to true

method message

1 set the spacing between grid marks
2 set the overall size of the grid
3 set the grid axis
4 set if the grid is drawn
5 set node for reference line and message filtering
6 set the scalar grid snap value
7 set the rotational grid snap value
8 filter all other messages

method app

method setDraw

method updateDebug

method updateReference

method filterMessage

method createGeometry

method makeGridGeosets

1 create center grid lines
2 create interior grid lines
3 create reference line geode
4 create polygon for exterior lines and intersection testing