MoI discussion forum
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Full Version: Blend Curve Exact Length?

From: OSTexo
20 Oct 2017   [#1]
Hello,

Is there a way to force a blend curve to an exact length between two lines? For example I have two horizontal lines 10mm apart above one another along Z and would like to have a curve blend 50mm in length between those two lines. Is there a way to do this? Thanks.
From: Michael Gibson
20 Oct 2017   [#2] In reply to [#1]
Hi OSTexo, the general mechanism of NURBS doesn't incorporate length as a driving input. It's more like curve length is a side effect from control point placement and a knot vector. So in general it's not easy to specify length for things like a freeform bendy curve like a blend would be. I don't know of any way to do that currently, it would probably require some kind of specialized iterative processing approach.

- Michael
From: OSTexo
23 Oct 2017   [#3]
Hello,

Thank you for the explanation. It makes sense about the iterative sort of approach. Would the situation be different if there was a midpoint anchor? Thanks.
From: Michael Gibson
23 Oct 2017   [#4] In reply to [#3]
Hi OSTexo,

re:
> Would the situation be different if there was a midpoint anchor?

I don't think that would make any difference as far as targeting a specific length result.

- Michael