[away3d] [broomstick] Move vertices?

[John Brookes]

I can do someting like

plane = new Plane(new ColorMaterial(0xff0000),250,250);
scene.addChild(plane)
SubGeometry(plane.geometry.subGeometries[0]).vertexData[0] += 100;

And that works. No idea if thats the best way.

But
SubGeometry(plane.geometry.subGeometries[0]).vertexData[0] += 100;

Inside the enterframe it has no effect.

Possible way?