Measure length between points along curve?

Hi GH community,

I've created a few profile circles offset from a curve and I want to scale the profiles based on their distances of each circle's centre from an attractor point which slides along the afore mentioned curve. [see pic]

I'm trying to generate the <scale> factor based on the lengths along the curve but am having trouble doing something as simple as this?

Hope you can help, thanks in advance!

Cheers,

GH Newbie

Replies to This Discussion

Permalink Reply by Yoann Mescam (Systemiq) on August 11, 2011 at 12:37pm

You can try using the Sub Curve and measuring its length :

(closed curves will need more work)

Attachments:

lengthCrvAtrr.gh, 4 KB

Permalink Reply by sphoon on August 11, 2011 at 12:52pm

Thanks for the help! Unfortunately, my version of gh won't open your file... could I get a snapshot of it instead?

Permalink Reply by Yoann Mescam (Systemiq) on August 11, 2011 at 1:06pm

When the attractor point is exactly on one of the points generating the profiles, the length will be null instead of 0 (because the subcurve is null). You can fix that using the Null component to filter those.