2 Attachment(s)
Migrating rotation centre?
Hi.
I am puzzled but I am sure it will be obvious to you.
I have
- drawn 2 circles, touching at the circumference.
selected them both
drawn a small box around the rotation centre (just so that I can see what is happening)
ctrl-K
rotated the 2 new circles by 10 degrees
and the rotation centre has moved. I do not undertand why.Attachment 123874Attachment 123875
Re: Migrating rotation centre?
Your combined selection is a rectangle and so the centre point will only align to the start at intervals of 90 degrees.
Once you release the rotate-drag, your centre is offset.
Acorn
Re: Migrating rotation centre?
Thank you very much for yor reply but, I'm sorry, I don't understand it.
I used the rotation textbox (rather than dragging) but I don't suppose that makes any difference.
I thought if I rotated around a centre, the centre would be stationary. I have drawn a rectangle and rotated that and the centre seems to not move.
Humble apologies if I am missing something really basic (which I obviously am).
Re: Migrating rotation centre?
Just a minute! Maybe I do understand.
Is it because the shape is not completely symmetrical, the shape of the selection rectangle changes and, therefore, the centre changes?
It still seems strange to me though that rotating around a centre moves the centre. Is there a way to do what I am trying to do?
Thank you.
1 Attachment(s)
Re: Migrating rotation centre?
Hello PeterC,
If you draw a third circle encompassing the first two and group the assembly together, the center of rotation does not move during rotation. You can then delete the outer circle.Attachment 123878
Re: Migrating rotation centre?
Welcome to TG Lorrian and an excellent answer ;)
Re: Migrating rotation centre?
Here is a fuller explanation i did earlier: https://www.talkgraphics.com/showthr...-their-Centres.
The Origin position control is applicable to your circles problem.
Acorn
Re: Migrating rotation centre?
Thanks very much for helping, Acorn and Lorrain. It is much appreciated.
Re: Migrating rotation centre?
Acorn, I posted my thanks before your last message arrived. That is very helpful. Thanks very much.
Re: Migrating rotation centre?
Thank you @Egg Bramhill for the welcome!
I didn't find a place to introduce myself (maybe I didn't look hard enough). There's not much to say, I'm just an amateur and I'm starting with the software I bought a month ago. While browsing the forum I have already found answers to some of the questions I was asking myself.