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