fader derived from ygNode

Description: sets the transparency of all nodes below it

notes:
Category: Attributes
Author: Alex Hill
Revision: 11/01/01

    Messages
set float set the alpha value
value float set the alpha value (deprecated)
alpha float set the alpha value (deprecated)
position float set the alpha value (deprecated)
    Comments

constructor fader

method reset

1 reset alpha to one

method message

1 set the alpha value
2 set the alpha value (deprecated)

method app

1 if first frame then get colors and materials
2 for each color list entry
2.1 set each color alpha value
3 for each material set the alpha value