I am looking for a way to take a spline of a specific length, and adjust its shape without adjusting the length. For context, this is for apparel patternmaking, where you have a roundish armhole shape into which you need to fit the top (cap) of a sleeve, which generally has a bell-like shape. The length of the armhole determines the length of the sleeve cap.
I can draw the cap shape and determine its length, but haven't figured out a way to set its length and keep it constant while I fiddle with the curves. Is there a way to do this?
Adjust the shape of a spline, keeping length constant
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Always indicate your operating system and QCAD version.
Attach drawing files and screenshots.
Post one question per topic.
Re: Adjust the shape of a spline, keeping length constant
There is no way to constrain splines like this in QCAD.
Here are a couple of suggestions:
- Keep an eye on the length property of the spline in the property editor while editing the spline
Or
- Split up the spline into smaller segments. Instead of modifying the spline segments, only move them around or rotate them, thereby guaranteeing that the total length stays the same.
Here are a couple of suggestions:
- Keep an eye on the length property of the spline in the property editor while editing the spline
Or
- Split up the spline into smaller segments. Instead of modifying the spline segments, only move them around or rotate them, thereby guaranteeing that the total length stays the same.