• derived nodes inherit all messages from their base classes
  
• see reset method for default settings
  
• this node is useful for grabbing objects and moving them when used in conjunction with a wandTrigger node
  

constructor grabber

destructor ~grabber

method reset

1 reset matrix to identity
2 reset node pointer

method message

1 toggle the grab/drop state with respect to a node
2 grab a node and move with repect to that node
3 drop connection with a node or any node grabbed

method grab

1 if the node has been found

1.1

Now we calculate the relative matrix between the node and this object
          We use the following formula to calculate our matrix...
                             -1
          matrix = M      * M
                    self     node
        

1.2 Set this instance as "grabbed"

method drop

1 if a node is being tracked then drop

method app

0.1

If we're still grabbed, move us and our node with the node
                                 -1
           M = matrix * M     * M
                         node    parent
        

0.2 Get the node's transformation matrix
0.3 Get our object's transformation matrix relative to the world
0.4 Set the new transformation and return