WorldViz User Forum - update sequence animation speed

Hi, I am trying to interactively update the speed of certain objects animations (sequences of animation) in my virtual reality. At the change of the variable "speed" I need that the speed of translation of my objects accordingly changes too. In the following code there is a a very simplified example of what I am trying to do.

Code:

import viz

import vizact



viz.fov(60)

viz.go()



#Add the ground plane

ground = viz.addChild('ground.osgb')



#Move the viewpoint back

viz.MainView.move([0,0,-7])



ball = viz.add('beachball.osgb')

ball.setPosition(0,1,0)



ball1 = viz.add('beachball.osgb')

ball1.setPosition(0,0,0)



myAction1 = vizact.moveTo([ball.getPosition()[0], -1,  ball.getPosition()[1]],speed=1) # Definition of the animation of the road (custom function that manages its resume defined from line 364 to line 439

myAction2 = vizact.moveTo([ball.getPosition()[0], ball.getPosition()[1], ball.getPosition()[2]],[ball.getPosition()[0], 4, ball.getPosition()[1]],speed=1)

myAnimation = vizact.sequence(myAction1, myAction2, viz.FOREVER)



myAction3 = vizact.moveTo([ball1.getPosition()[0], -1,  ball1.getPosition()[1]],speed=1) # Definition of the animation of the road (custom function that manages its resume defined from line 364 to line 439

myAction4 = vizact.moveTo([ball1.getPosition()[0], ball1.getPosition()[1], ball1.getPosition()[2]],[ball1.getPosition()[0], 4, ball1.getPosition()[1]],speed=1)

myAnimation1 = vizact.sequence(myAction3, myAction4, viz.FOREVER)



ball.addAction(myAnimation)

ball1.addAction(myAnimation1)



def changeSpeed(pos):

        print str(pos), viz.Vector(ball.getVelocity())

        ball.setVelocity([0, pos, 0]) 

        ball1.setVelocity([0, pos, 0]) 



####        ball.setSpeed(pos) 

####        ball1.setSpeed(pos) 



slider = viz.addSlider()

slider.setPosition([.5,.5,0])



#Setup callbacks for slider events

vizact.onslider(slider, changeSpeed)

I really appreciate any help you may give me.
Valeria