divideAll(property, amount, checkAlive, checkVisible)
Divides the given property by the amount on all children in this group. Group.divideAll('x', 2) will half the child.x value for each child.
Parameters
Name Type Description property string The property to divide, for example 'body.velocity.x' or 'angle'. amount number The amount to divide the property by. If child.x = 100 then divideAll('x', 2) would make child.x = 50. checkAlive boolean If true the property will only be changed if