jumpBy action multication

Hello,
I was wondering if it is possible to change the property of an action after creation. Say we create a jumpBy action in the init, and later, depending on how long a key is pressed, we want to multiply the height.

I guess that to make a character jump it is not a good idea to use a jump action? Probably it would be best to work with vectors and use sprite->setPosition() or something like that. But in case we want to take advantage of the existing jump action, can we modified its parameters after creation?
Thanks

Auto reply. No, you can’t.

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