[masaki]

you can try using viz.mouseScale() and set the scale factor for the navigation to 0 and then switch it back to 1 when you want the simulation to move again.

For example:

def goStopTask():
	
	viz.mouse.setScale(0,0)
	yield viztask.waitTime( 2)
	viz.mouse.setScale(1,1)
	
vizact.onkeydown( ' ',  viztask.schedule, goStopTask )

when you hit the space bar, the program will scale the mouse input to 0 for 2 seconds, and then back to 1.

Best,
Masaki