How to detect what side of a part a player clicks on with player:GetMouse()

[DeleteDMoonz (Asterith)]

Hello!

Objective: So, im making a simple building system and I want to detect the side of a part that the player clicked, so I can place the part in this side.

For now, I have this: if a placed block is clicked, the part will be created on the top of this block, but that is not all I want.

	i.Position = mouseTarget.Position + Vector3.new(0, 2/2, 0)
	if table.find(objects, mouseTarget.Name) then
		i.Position = mouseTarget.Position + Vector3.new(0, 2, 0)
	end

I already searched for some topics about this, and:
Use surface guis with buttons in each side: Well, Im using :GetMouse for this so I dont believe that this would work, and I also think it would cause lag.
Use multiple parts for each side: This is a great idea, but I think it would cause lag and also I want something “simple”.

So, is there any way to detect which surface/side of the part was clicked, and place the block in this side? Any help is appreciated.

[acuaro]

How do I detect what face/side of a part a player clicks on using UserInputService?

If you want to be able to place blocks on the side you click, then you can use raycasting and use the normal after clicking the mouse button. The normal is a vector that is perpendicular to a surface local Mouse = Player:GetMouse() local Camera = workspace.CurrentCamera local ray = Camera:ViewportToRay(Mouse.X, Mouse.Y, 1) -- this is where you customise your raycast params to your liking local params = RaycastParams.new() local result = workspace:Raycast(ray.Origin, ray.Direction * 300, param…

I think this could help quite a lot. Similar circumstances aswell.

[DeleteDMoonz (Asterith)]

Thank you!
I will take a look on this and i’ll reply

[acuaro]

Whoops, reading the thread looks like you can also use Mouse.TargetSurface. Might be simpler for your scenario, but your choice.

[DeleteDMoonz (Asterith)]

Oh, sure. (and sorry for the late reply)
I tried Mouse.TargetSurface.Name but it returns attempt to index nil with 'Name', what is wrong?

[acuaro]

It’s because Mouse.TargetSurface is not a part.