8 Replies Latest reply on Dec 26, 2013 1:24 PM by leangare

Problem with rotations using timeline's Tween.

Hello,

I am having this issue in which the inbetweening position of a rotating object gets all "jumpy".

It doesn't matter if I use Classic or Motion Tween.

Since it's a small rotation, I was thinking it might be a rounding error.

Has this happened to anyone? Any solutions?

Thank you.

• 1. Re: Problem with rotations using timeline's Tween.

i don't see any problem rotating an object with a classic or motion tween.

and what's that picture supposed to demonstrate?

• 2. Re: Problem with rotations using timeline's Tween.

The picture shows the object in different frames (using the onion skin outline).

It was supposed to be in regular spacings, not jumping from one rotation to the other.

• 3. Re: Problem with rotations using timeline's Tween.

Hi,

Can't really figure out the problem from this picture, but you might want to check if the transformation point of your symbols is set correctly (the point about which the symbol rotates).

-Nipun

• 4. Re: Problem with rotations using timeline's Tween.

OK, it's pretty easy to get this effect (at least in my Flash CS6 and my computer, it does happen all the time I do the following):

1 - Create new document with large size (let's say HD - 1920X1080)

2 - Create a line that covers about 2/3 of the area.

3 - Convert the line to a Symbol.

4 - Move the line's anchor point to its basis, so its rotating as if it were an arm.

5 - Create another keyframe at frame 30 and rotate the symbol about 1 degree.

Now turn onion skin on and check the inbetweens Flash creates. They are not equally spaced (smooth movement).

This problem seems to happen with both classic and motion tween, trying other methods, the only tool that gave me the desired results were bones.

• 5. Re: Problem with rotations using timeline's Tween.

this is what i see

• 6. Re: Problem with rotations using timeline's Tween.

hey kglad... Zoom in some more and probably you'll see the problem.

You have 30 frames, you were supposed to have 27 inbetweens the frame 1 and 30, but instead you have only 3!

If you play your animation, you'll see the line jumping from one position to another instead of just going smoothly from its position in frame 1 to 30.

• 7. Re: Problem with rotations using timeline's Tween.

flash can't handle anything less than .05 of a pixel.  so if the line is long enough those .05 transitions at the base will be several pixels at the tip.

• 8. Re: Problem with rotations using timeline's Tween.

Really?! Even rotations?!

That's disappointing.

I tried to increase my stage size to ludicrous amounts and still the problem persists.

I guess I'll have to use bones.