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Perfect circle with centered anchor point

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Michael Patten
Perfect circle with centered anchor point
on Mar 18, 2010 at 10:11:50 pm

What is the best way to create a perfect circle shape layer with the anchor point in the center using AE CS3? Is there any way to automatically center the anchor point?


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Dave LaRonde
Re: Perfect circle with centered anchor point
on Mar 18, 2010 at 10:15:21 pm

This is so easy it's sinful.
  • Make a solid of equal horizontal and vertical dimensions IN SQUARE PIXELS.
  • Double-click on the solid--it opens in its own window.
  • Find the ellipse mask tool, and double-click on it.

You're done.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Michael Patten
Re: Perfect circle with centered anchor point
on Mar 18, 2010 at 10:42:26 pm

Perfect! Thank you.


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Jeremy Allen
Re: Perfect circle with centered anchor point
on Mar 18, 2010 at 11:10:04 pm

OR...

- turn on Action/Title safe guides
- select the ellipse tool
- position your cursor over the center cross hairs and start dragging
- without releasing the mouse, press command to expand from the center and shift to constrain to a perfect circle

This works for square and non-square pixel comps.

---------------------------------------------
8core MacPro, 3.0 GHZ, 10GB RAM, OSX 10.5.6

C4D 11.5
AE CS3
FCP 6.0.1


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Darby Edelen
Re: Perfect circle with centered anchor point
on Mar 19, 2010 at 8:25:46 am

[Jeremy Allen] "This works for square and non-square pixel comps."

Both methods can work for square or non-square pixel comps as long as the solid that Dave's mask method is applied to uses square pixels.

In the method you provided I would be concerned about the potential of user error in position of the anchor point relative to the center of the circle. If it's not perfect and there's rotation involved even a sub-pixel error can cause trouble.

An alternative to make sure that the shape layer is perfectly centered on the anchor point is to hold shift while dragging out the Ellipse Tool anywhere in the composition. Then twirl open the layer's Contents > Ellipse 1 > Transform: Ellipse 1 properties and change the Position property to [0,0].

If you need to resize your circle to a specific diameter, that setting is under Contents > Ellipse Path 1 > Size.

Darby Edelen


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Michael Banks
Re: Perfect circle with centered anchor point
on Jul 25, 2013 at 5:26:28 pm

Thanks, Darby. Your method of creating a perfectly centered circle was what I was looking for.

One hang-up I experienced was that I was trying to apply your method to a solid layer, and the "Contents > Ellipse 1 > Transform: Ellipse 1" property didn't exist. I had to apply the Ellipse tool to an empty comp to get your result.

Thanks again!

-Michael

*****
Avid Media Composer 6 (HP Z400 Workstation: Windows 7 64-bit; Intel Xeon 6 Core W3680 CPU; 6 GB RAM); Adobe CS6 Production Premium; DepthQ Stereoscopic; Digital Rapids StreamZHD v.3.7.4.47.


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Ben Mullins
Re: Perfect circle with centered anchor point
on Dec 17, 2013 at 4:24:52 pm

Thank you! Simple tip but very rewarding!



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Jeff Salman
Re: Perfect circle with centered anchor point
on Oct 24, 2014 at 3:32:05 pm

Was trying to figure this out with a shape layer. Darby, your explanation helped me too. Just wanted to say thanks!


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