4 Replies Latest reply on Apr 5, 2013 1:02 PM by mctenold

# Center point of a circle different than the center point of a polygon?

In Photoshop/Illustrator, when I create a polygon, and rotate it around it's center point it wobbles. When I scribe it inside of a perfect circle, and rotate it around the circle's center point it rotates smoothly. Basically proving that (at least according to these Adobe products) that the center point of a circle is different than the center point of a polygon scribed inside of it.

An image to help – the dots in the center are the corresponding center points according to Adobe:http://i.imgur.com/Yh1yTsL.png

This is incorrect according to basic math. Is Adobe aware of this bug?

• ###### 1. Re: Center point of a circle different than the center point of a polygon?

The centre of a shape in Illustrator and Photoshop is considered to be the centre of its bounding rectangle as shown below for your polygon.

• ###### 2. Re: Center point of a circle different than the center point of a polygon?

Why is this method used, when the basic rule in math is different?

The center point of a polygon, in math, is defined as: "The point inside a regular polygon that is equidistant from each vertex."

Meaning it should be the same center point as the circle.

• ###### 3. Re: Center point of a circle different than the center point of a polygon?

Photoshop considers a path to be an arbitrary path and has no concept of a path being a regular polygon.