Hello!
It would be extremely helpful for me to constrain the length of also a line and an arc in the sketcher. So I could generate (rather trivial) sheet metal unroll jobs in the sketcher.
Thank you!
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Christoph
Yes, although that is a constraint which I can set but it does nothing.hokieengr wrote:As in set the line length and the length between the two end points of the arc to the same value?
I asked Abdullah on his opinion about this:chrili_rakete wrote:I posted this as a feature request into the bugtracker: http://freecadweb.org/tracker/view.php?id=2939
Unfortunately i explicitly asked about Arc length constraint. And the answer was it wouldn't be trivial to implement such constraint.chrili_rakete wrote:Thank you triplus – I did not know about this interesting discussion. I am not absolutely sure, but I think that my request is similar, but much more trivial, as I was asking for the length of a simple arc (given e.g. center, starting and end-point geometry, radius) to constrain. Compared to splines or other complex curved geometry as it is discussed in your post, the algorithm of constraining the length of an arc to another length might be considerably simpler. And for me: very useful
Oh yes, I did notice that – but I think that microelly2 and abdullah continued to talk about "curves" in their answers. (Sorry if I might be wrong!)triplus wrote: Unfortunately i explicitly asked about Arc length constraint. And the answer was it wouldn't be trivial to implement such constraint.
Yes, this is possible, at least in 0.17 – for example you can constrain the length of a line in a sketch to the length of an arc (Draft) via the expression "=Arc.Shape.Length"triplus wrote: P.S. I am wondering if expressions could be used in combination with existing constraints. I guess it depends on the use case.