[Papervision3D] update width of plane instance

[Nick Collins]

In my distortion envelop experiment (
http://staging.nc-design.net/distortion/ ), I have a method where I
can change the text on the fly. It works very well, except that I need
to be able to update the width of the plane, so that the text that is
longer than the initial text ( when the plane is instantiated ) does
not get cut off.

Now, as near as I can tell, except for when Plane constructor is
initialized, there isn't anywhere where I can specify the width of the
plane object. Does anyone have an idea how I might be able to
accomplish the feat of changing the width dynamically? Simply
manipulating the geometry doesn't work because that stretches the
material.

Nick