How do I trace along the slope of a surface, when I cast a linetrace onto it?

[xTheJim]

I’m hoping this is fairly simple, but I can’t wrap my brain around how exactly to do it in blueprints.

I’m working on setting up a climbing system. If I trace a line out from my character’s face and impact on a surface, how do I get the vector direction that’s perpendicular to the normal of the surface that I hit, in the direction that the character was facing? See the image below, I’m trying to get the Blue vector.

Thanks for any help that folks can provide!

[Nawrot]

Get normal to surface at that point

then:

Project Vector on to Plane

Which uses that same normal vector, second would be camera/face forward vector.

Then normalize result and (possibly multiply by some value) to have same length of vectors.