Weaopon line tracing.

all of those versions are lower than 5.2 and they all have a particular spot to start for line tracing.

Nah, no they don’t. Line trace takes a pair of vectors and it’s up to you to provide them; there is no standard way of doing it.

  • if I had a gun with 3 barrels, I may want to trace from each barrel
  • if shoot laser out of my eyes, I’ll eyeball it, so to speak
  • when performing an orbital strike, you’d trace from top ==> down or towards a mouse click location

a particular spot to start for line tracing

What kind of spot are we talking about then? Perhaps you’re looking for sockets! Quite often folks add sockets to meshes to indicate a specific spot on the mesh, like an attachment point for a scope or… the muzzle where tracing can start if we want to be super accurate.