How to Make Continuous movement-curve generation ?

[koukileo]

I saw people using arcs and straight lines to connect . I can't figure out how to do it. Can someone help me?

https://www.youtube.com/watch?v=mCN51L2WAGM

[altenbach · Accepted solution]

Have a look at my very old example (posted here)

[koukileo]

Thank you so much~ I'll give it a try~ great

[koukileo]

Excuse me~ Can you draw a 30cm safety line extending from left to right to the center of the route?
as the picture shows~  thank