• derived nodes inherit all messages from their base classes
  
• see reset method for default settings
  
• the timer can move backwards and forwards
  
• see the interpolate node for more information
  
• timers can be used in conjunction with other nodes to add dynamics to the scene
  

constructor timer

destructor ~timer

method reset

1 reset position
2 set duration to 1
3 set inactive
4 set direction to forward

method message

1 set timer duration
2 start timer moving forward from zero
3 stop timer
4 move timer forward
5 move timer backward
6 move timer to the front
7 move timer to the back

method app

1 if active

1.1 if reverse subtract frame time, else add
1.2 if timer is at an extreme

1.2.1 if direction is reverse

1.3 calculate interpolated array values

1.1 the timer has reached the front

1.1 the timer has reached the back

1.1 the timer has reached one extreme