How to find the curve’s peak and trough point?
Who could help?
Thanks
Normally the Quad object snap should find those.
Could give a example?
@Helvetosaur
Could give me a example?
I couldn’t understand
are you trying do solve this with grasshopper? if so you should change or use some tags for your topic, otherwise rhino has Object Snaps, a very essential part of how Rhino works. there you can activate Quad and it will let you snap a point or anything else to a local quadrant.
what kind of hacked version of Rhino have you got? Not for Resale Lab ts ts ts 
@encephalon @Helvetosaur
Thanks
Could find those points using grasshopper?
Could you help?
@encephalon
Rhino7.5
It’s called a reseller license…
and who will help understanding my humour? 
sigh…
@1850292957 can you explain briefly what your further intent is? also add grasshopper as a tag in your topic i am sure you will find more help then.
what i found in a quick search on google:
@encephalon
Thanks
I don’t know the intent is what , this question is my workmates asking
Whatever…
right.