A way to "ease in/ease out" movements?

[weeix]

Hello,
I wonder if there is a way to "ease in/ease out" movements like Adobe After Effects?

If you never used Aftere Effects please take a look the illustrate in this document: http://jjgifford.com/expressions/basics ... ation.html

I'm trying to create a function which can move a node to any specific position. I'd be great if I can make it moves smoothly.

Thanks, V.

[BlindSide]

Sin function would work nicely for this.

Try something like:

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currentSpeed = fullSpeed * Sin(journeyRatio * (PI / 2));

Where fullSpeed is the speed you want it to travel at the middle of the journey and journeyRatio is a value from 0 to 1 that says how far along it is (DistanceTravelled / TotalDistance).

Hope that works! (Didn't test )

EDIT: Oops just realised you should do:

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currentSpeed = initialSpeed + fullSpeed * Sin(journeyRatio * (PI / 2));

Where initialSpeed is a slow speed it will travel at the start and end, otherwise it won't move at all at the start and the speed will stay a constant 0!

[weeix]

I never think of using sin function.

Thanks!