Why do some objects move from their base position during motion tween?

[malinr30053532]

Hello people, let's see if you can solve this little mystery for me! Sorry if my grammar and explanation is a bit off, this isn't my native language.

I animate little videos for my own amusement and use motion tweens to move objects around. Simple. Sometimes I don't want the objects to move along a straight line so I change tools to (V), grab the purple line and move it around a bit. Thus the object moves in, for example, a half circle. So far so good. The problem is that sometimes when I do this the base position of the object itself also changes. Here's an example:

Let's say in the first frame of the motion tween the object is positioned at X: 411 Y: 416 and in the last frame it has been moved to X: 525 Y:450. I grab the purple line and manipulate it to make the object move in half a circle. For some reason this not only changes the position of the object during the tween, it also moves the base position of the object even affecting the first and last frame. Now the object suddenly begins its path in the first frame at position X: 389 Y: 426 and so on. Even if I remove the tween the object stays in this new position. The symbol type is either graphic or movie clip, doesn't matter which one.

What am I doing wrong? And what can I do to stop this from happening? Please avoid suggesting using Actionscript more if possible since my knowledge in that aspect is embarassingly limited.

Sorry if I made this sound terribly confusing. I could add a few pictures if that makes the problem at bit more clear.

Thanks in advance

Malin

[JoãoCésar]

It usually happens because the transformation point (that white dot that can be seen when the Free Transform Tool (Q) is used to manipulate an object) is not consistent on each keyframe. Please make sure it stays on the same place.

[malinr30053532]

Thanks a lot everyone! I've done some more experimenting and the object is definitely moving away while the transformation point stays at the exact same position as I'm moving the purple line around. Any idea as to how I actually get the transformation point and object maintain their original relationship? Is there some kind of lock function that I'm unaware of?

And since I forgot to mention that before I do use the ActionScript 3 FLA, if it helps in any kind of way.

[JoãoCésar]

Can you share your FLA so we can take a look?

[Colin Holgate]

The transformation point moving is an HTML5 Canvas specific issue. If you're animating to go to video, use an ActionScript 3 FLA. That will give you more filters, better quality, and you can animate the transformation point too. You also get to use Stream sync for the audio, which makes lining up sound an animation a lot easier.

[ClayUUID]

You actually can smoothly tween between different registration points in Canvas, but the IDE doesn't preview it correctly.

[malinr30053532]

I could't find how to share the FLA here since was a bit short on time so here's a link to the FLA on my Onedrive if that's permitted:

Microsoft OneDrive - Access files anywhere. Create docs with free Office Online.

I've removed a few scenes to make it less confusing. The object I'm having trouble with right now (simple white rectangle) should be the first thing you see when opening it up. If you really want the whole FLA I can upload it after work, and if there's a better way to share it I'll happily do that too.

[JoãoCésar · Accepted solution]

Thank you for sharing the file.

Is the rectangle from the Fodralet layer, isn't it?

If it is, the only problem I found is that the first key frame, when the object is still static, and the second keyframe, when the object starts moving, don't have the same x and y values.

All you have to do is to copy the x and y position of the rectangle in the first frame and paste them to the object in the second frame using the Properties of Info panel.

[ClayUUID]

To make objects identical at different points on the timeline, it's much easier to copy the object from one frame, then delete it from the frame you want to fix and use paste in place (ctrl-shift-V) to replace it.

[JoãoCésar]

Certainly.

It's even easier to alt-drag one keyframe over the other.

[malinr30053532]

Thanks a lot again everyone!

Yes, it's the rectangle shape in the layer Fodralet I'm having trouble with. It most definitely works if I copy and paste the X and Y positions between the first and second frames but the transformation point still moves around so I'll have to do the copying and pasting after I've created the movement I want. It sure feels strange to have to do that when most objects doesn't need this extra treatment.

Anyways I've come to the conclusion that there must be something not right with the object itself. I degrouped (?) it to its most basic form, turned it into a graphic symbol and now it works just fine. I have no idea what I did wrong in the first place but let's just hope that this doesn't randomly happen to a fully animated object

[peterp12625434]

Its 2024, they still have not fixed this problem.. everytime I go into an old file, everything grouped is shifted around.  This is bullsh@t.. I cant work like this.. have to find a different program to use.  We pay for subscriptions and they dont fix anything..

[kglad]

use classic tweens

[peterp12625434]

Thats not the problem.  Im not talking about anything being animated.. just cartoon designs that are drawn, some parts in groups.  Like a frog character that has eyes or arms grouped... they arms and eyes are then out of place when I come back into the files.  Sometimes it wrecks the entire expression or pose.  Nothing has been done to address this, and this is a well known problem that other programs have.. enough work arounds that dont work.. just make a freaking stable version already....

[kglad]

this isn't the correct location for your post.

if you can reproduce the problem, report to adobe.  for applicable apps, use https://helpx.adobe.com/ie/x-productkb/global/how-to-user-voice.html

for others, use https://www.adobe.com/products/wishform.html