Seems an obvious enough quest, couldn’t find the answer with the search though.

I have a Ray and a Mesh.

I would love to get 2 things:

1. at what vector does the Ray intersect the Mesh?
2. what is the normalVector of that specific Face.

and before I implement such a thing, what are your thoughts on this performance-wise. Do I want to do something like this at every frame?

Have you tried AwayPhysics? you can have ray collision and it gives you the normal vector of the colliding face. It’s also very fast.

Thanks for your suggestion. I am not using AwayPhysics though, was kinda hoping for a Away3D -standard solution.

AwayPhysics is pretty fast since the core code is compiled with Alchemy. Otherwise looping thru geometry vertexBuffer and doing all the math yourself is the only option that I know of. You can find lots of tutorials and code samples on the math part googling “ray triangle intersection”.

Hope it helps.