How would you detect terrain?

[targetframed (target)]

so thru sum help i made a script that places parts around ur character in a circle but i want to place them on the terrain if that makes sense…?

how would you detect terrain for doing something like that; if that’s possible that is…? i appreciate any help ty!

[GuinPeng (Matcha)]

Shoot a raycast from around +10 studs above the blocks downwards, then put the blocks to where the raycast lands

[Raycasting | Documentation - Roblox Creator Hub]

[builderbloxy012]

raycast can include terrain, create a raycast facing down from the part and make sure terrain is included in the raycast and set the parts position to the hit poisition + half of the size of the object.

not tested, but this should would

local part = script.Parent
local origin = spawnPosition + Vector3.new(0,10,0)
local rayDirection = Vector3.new(0,-100,0) -- 100 is just the range of the raycast
local raycastParams = RaycastParams.new()



local raycast = workspace:RayCast(origin, direction, raycastParams)

if raycast then
   part.Position = raycast.Position + Vector3.new(0,part.Size.Y/2,0)
end

[xxmanado]

would he better do it on client or server side? because probably hackers would be exploiting onc client side but on the server side how could he do it?

[GuinPeng (Matcha)]

Should raycasting be done on the client or server?

Do both use Server events but listen if you do it to the way where the server makes parts in a folder and the client visulaizes those parts and the server can check the positon of the servers line of the raycast and the clients line of the raycast if the line is different than the server can ban clients for hacking as the inital raycast should be the same as the client ray cast [RAYCASTS]

[targetframed (target)]

hey Matcha,
thanks a million for your help and for the links; i read over them all and got it. thank you so much!!

[targetframed (target)]

hey builder,
thanks a million for your help mate. i got it straight away. tysm

[xxmanado]

this method isnt 100% efficient no?