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ProjectOnPlane might be what you're after. https://docs.unity3d.com/ScriptReference/Vector3.ProjectOnPlane.html It might not keep the magnitude...
Hmm, well i haven't really used raycasts in Unity so I don't know how efficient they are. When CCD is enabled for an object I've read that physx...
One method could be to raycast instead. Give the bullet object a rigid body but no collider. Add a script to the bullet that cast a ray between...
Well, the thing with a convex mesh collider(convex hull) is that it must be convex. No holes or any concavities what so ever. What you need is...