Moving control points using snaps with lock constrain

Serengeti (Rhino WIP)
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1

• as in the video I use Rhino8 bgut same in rhino9 for now, I lose the lock constrain (TAB) when I use the PerpFrom snap.
• Also, I noticed that I cannot use PerpFrom with a “nested” AlongLine snap, which would be useful to do this simple task…

How would you do this quickly without using guides, or adding any auxiliary construction line?

2

Have you tried using Smarttrack?

3

yes: in rhino smarttrack gets messy if you have other objects in the scene and it can happen that it inadvertently snaps to other snaps, hence I need to disable snaps, isolate objects… cumbersome to use smarttrack in my workflow.

I prefer to have the certainty to snap where I want with more precise available tools, as they are there in Rhino