Moving point along a curve to a specific length

Hi all

Probably something very basic that I should be able to do without the help of everyone. currently working up a massing model of a roof which is curved. at points the roof is inset. to do this quickly I just split the curve in 4 and used offset to quickly model them. this works to a point but produces off centre splits.

I want to create it by moving the point along the curve by the specified offset then create two lines to loft between

Roof (10.8 KB)

You need to internalise your data!