Hello ~
I want to draw a line where the point of contact between the plane and the sphere faces the outside of the sphere, what data do I need to get and how do I calculate it.
Thank you.
Hello 
There are several ways, but since you already binded a mesh (ground) on the surface normal, you could just add a child to it : Playground
(Edited materials just to have it more visible but I let you edit)
++
Tricotou
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