Hi!

To be specific, I am going to create a dart in the armhole. The armhole is one curve from lower point in the side, to shoulder, via a couple of “helping” points. The center of the dart is a point on the curve. And then I want to go up and down 1,5 cm from the center point of the dart by following the armhole curve.

I am struggling to do so. I see how I can make fractions of a curve from the curve’s start point, and I could for sure do something like Length(Curve total) - length(startpoint to centerpoint dart) and then +/- 1,5, but I can’t seem to find a way to calculate, or find, the length of the curve to the center dart point.

Can someone guide me trough this, or point me to a tutorial?