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I am trying to get the effect seen in the answer for this question How do you animate the labels for a diagram in Blender? to work on a circle. I created a new curve -> Circle, set it to 2D, set fill to "none", increased the bevel depth and resolution, and then animated the bevel factor, but to no avail. How should I go about achieving this?

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After creating the circle, from Shift A > Curve > Circle, go to the Object Data panel and set Fill to Full. Then, increase the values for Depth and Resolution under bevel.

Then , go to the modifiers and add a Build modifier. Afterwards,add a value of 1 for Start and keep length at 100. When you press play your circle will be drawn :)

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A Curve>Circle is not going to work for what you want to do, a circle is a closed path and you need an open one.

Create a curve and make the circle so that the start and end point of the curve are in the same place, but do not close the path. enter image description here

Then animating the start or end of the bevel factor should work fine.

enter image description here

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