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# Illustrator question

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 Illustrator question on Jan 7, 2009 at 12:58:53 pm

Using Illustrator (CS4) Is there a way to find out how long a circular path is?

I have a circle that i wish to apply a dash effect to, but i want to be able to create a specific number of dashes along that line. Its to simulate etching marks on a compass or viewscope.
If i could find out how to determine the length of the curved path, then working out the dash sizes is a piece of cake...i hope!

thanks

Video Editor/Audio Mixer/ Compositor/Motion GFX/Barista
Character Options Ltd
Oldham, UK

http://www.sculptedbliss.co.uk

 Re: Illustrator questionon Jan 8, 2009 at 8:25:38 am

Circumference is the "length" of the outside of the circle. To find out how long that line is do this simple equation

Circumference = 3.14*Diameter

So, to find the Circum. of the circle, find out the Diameter of the circle (from one side to the other). To do that;

1. Make the circle.
2. Click and hold on the "Eye dropper tool" to find the "measuring tool" inside the same group.
3. Measure straight accross the circle at its farthest points.
4. Plug that measurement into your equasion as your *Diameter* (e.g. C = 3.14*2.05 : C = 6.437)
5. Now take that measurement of C (or 6.437) and divide that by the number of lines you need to find out how many inches (or in this case, tenths of an inch) you need.

I hope this was what you were looking for.

 Re: Illustrator questionon Jan 8, 2009 at 9:03:33 am

thanks Nathan,

I had a horrible feeling it was going to involve maths !

regards

Video Editor/Audio Mixer/ Compositor/Motion GFX/Barista
Character Options Ltd
Oldham, UK

http://www.sculptedbliss.co.uk