How to get the normal from a part by a other parts position without using rays

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1

So im trying to get the normal or face surface type based off the position from another part,

P1 is the parts position
P2 is the main part

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2

Just the four sides?

I’m assuming p1 and p2 are both parts.

First find the object-space offset of p1:

local offset = p2.CFrame:PointToObjectSpace(p1.Position)

Divide by the part size so you can directly compare the two:

local size = p2.Size
local dx = offset.X / size.X
local dz = offset.Z / size.Z

And check which is bigger, then differentiate left/right and up/down

if math.abs(dx) > math.abs(dz) then
  if dx < 0 then
    print("left side")
  else
    print("right side")
  end
else
  if dz < 0 then
    print("front side")
  else
    print("back side")
  end
end
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3

well what if rotation was included in.

4

Sorry, not sure what you mean. This would work even if p2 was rotated.