Using nulls to apply expressions can be a great way to apply a ‘hands off’ method of using expressions to direct your object while leaving the child object free.
This gives you flexibility and freedom as you apply the expressions and greater control with the null object. Why not apply these same expressions to the primary object ? why bring a null into the picture ?
One of the best ways of viewing the use of a Null is that it gives you the ability to control/impart certain like charactertics to child objects while keeping their independence from one another. You might want them to share a path but scale differently or vice versa. Using a Null will let you do this.
I want to set up a dog chasing a cat. This is a cute animation with the animals emotions glowing, their relative size expanding with their emotions but their postion
is very much connected, the dog is chasing the Cat !
we can tie both to a Null to create this linked position while leaving them free ….
to express their own emotions
