good one
Your Z Position should be the CFrame Position of the Part the mouse hits, so Mouse.Target, not the mouse hit.
Do all your calculations based on the CFrame Position and Size of the Target as well as the size of the preview Part you are placing. If all your Parts are the same size don’t calculate based on the Size of the Part, just use the number that’s 1 space on the grid. This means if all your blocks are 4 studs then use 4 studs for placement because that’s the calculation of your grid.
Also, use math.round(mouse.Target.Position.Z) because math.round(mouse.Target.Position.Z/1)*1) is exactly the same value.
If you want more information I’ve seen plenty of grid placement posts on the forums. Try the Search button up top to find better answers than I can give.
srry bro i was dead alseep when you answered 
you can either find egomooses or try mine
the grid system your trying to make is at the top just go to the bottom for mine
but it works with raycasts
local position = target.Position + normal * target.Size.Z
Can you give a code example?
The 2 give the exact same value, let’s say 1.445 as the mouse.Target.Position.Z.
math.round(1.448) is 1
math.round(1.448 / 1) * 1 is 1
It looks like you’ve modified a line of code someone else has suggested that is designed to round to however many decimal places you want. Let’s take the same example of 1.448 rounded to 2 decimal places. Instead of using 1 you’d use 100 in the equation.
math.round(1.448 * 100) / 100 would give 1.45
For a grid system you’d need to use the formulas in @GAGA12345677’s link.
When I modify the code, it breaks.
Who are you replying to? If you reply to yourself then we don’t see the reply. I just happened to get the notice that someone had posted on the thread.
If you’ve modified the code then give us your new modified code so we can help. We can’t read your mind so we can’t tell if you just had a small spelling error or you have extra or not enough code.
Telling us ‘When I modify the code, it breaks’ is like taking a car to a mechanic and saying ‘Something is broken’.
The code I gave was just to let you know your line of code had too much stuff in it and possibly why it was there. I didn’t mean for you to change the line to anything other than math.round(mouse.Target.Position.Z)
You can always utilize collisiongroups for specific collisions
local PhysicsService = game:GetService("PhysicsService")
local function toggleCollision(object1, object2, enableCollision)
local collisionGroupName = "collisiongroupname" -- set collisiongroup name (optional)
local object1CollisionGroupId = PhysicsService:GetCollisionGroupId(object1.Name)
local object2CollisionGroupId = PhysicsService:GetCollisionGroupId(object2.Name)
if object1CollisionGroupId and object2CollisionGroupId then
local isCollisionEnabled = PhysicsService:CollisionGroupsAreCollidable(object1CollisionGroupId, object2CollisionGroupId)
if enableCollision and not isCollisionEnabled then
PhysicsService:CollisionGroupSetCollidable(collisionGroupName, object1.Name, object2.Name, true)
elseif not enableCollision and isCollisionEnabled then
PhysicsService:CollisionGroupSetCollidable(collisionGroupName, object1.Name, object2.Name, false)
end
end
end
local RunService = game:GetService("RunService")
-- the blocks you want to check for hovering
local block1 = game.Workspace.Block1
local block2 = game.Workspace.Block2
local hoveringThreshold = 1 -- adjust this value based on how close the blocks need to be to be considered hovering
local function areBlocksHovering(block1, block2)
local distance = (block1.Position - block2.Position).magnitude
return distance <= hoveringThreshold
end
local function updateHovering()
local hovering = areBlocksHovering(block1, block2)
toggleCollision(block1, block2, not hovering)
end
RunService.Heartbeat:Connect(updateHovering)
I forgot the script here it is
local stuff = game.ReplicatedStorage:WaitForChild("Folder")
local event = game.ReplicatedStorage:WaitForChild("RemoteEvent")
local tool = script.Parent
local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local mouse = player:GetMouse()
local uis = game:GetService("UserInputService")
local runservice = game:GetService("RunService")
local place = false
local rotate = false
local rotateamount = 0
function reset()
if place == false then
place = true
preview = stuff:FindFirstChild(tool.Name):Clone()
preview.Parent = workspace
for i, parts in pairs(preview:GetDescendants()) do
if parts:IsA("BasePart") then
local boundingbox = Instance.new("SelectionBox")
boundingbox.Parent = parts
boundingbox.Adornee = parts
parts.CanCollide = false
end
end
uis.InputBegan:Connect(function(input, gameproccessed)
if not gameproccessed then
if input.KeyCode == Enum.KeyCode.R then
rotate = true
rotateamount += 10
end
end
end)
uis.InputEnded:Connect(function(input, gameproccessed)
if input.KeyCode == Enum.KeyCode.R then
rotate = false
end
end)
uis.InputBegan:Connect(function(input, gameproccessed)
if not gameproccessed then
if input.UserInputType == Enum.UserInputType.MouseButton2 then
rotateamount = 0
end
end
end)
runservice.RenderStepped:Connect(function()
if place == true then
mouse.TargetFilter = preview
if preview:FindFirstChild("MainPart") then
local cframe = CFrame.new(math.round(mouse.hit.Position.X/1)*1, mouse.hit.Position.Y + preview.PrimaryPart.Size.Y/2, math.round(mouse.hit.Position.Z/1)*1)
local angles = CFrame.Angles(0, math.rad(rotateamount), 0)
preview:SetPrimaryPartCFrame(cframe * angles)
end
end
end)
end
end
tool.Equipped:Connect(function()
place = true
preview = stuff:FindFirstChild(tool.Name):Clone()
preview.Parent = workspace
for i, parts in pairs(preview:GetDescendants()) do
if parts:IsA("BasePart") then
local boundingbox = Instance.new("SelectionBox")
boundingbox.Parent = parts
boundingbox.Adornee = parts
parts.CanCollide = false
end
end
uis.InputBegan:Connect(function(input, gameproccessed)
if input.KeyCode == Enum.KeyCode.R then
rotate = true
rotateamount += 10
end
end)
uis.InputEnded:Connect(function(input, gameproccessed)
if input.KeyCode == Enum.KeyCode.R then
rotate = false
end
end)
runservice.RenderStepped:Connect(function()
if place == true then
mouse.TargetFilter = preview
if preview:FindFirstChild("MainPart") then
local cframe = CFrame.new(math.round(mouse.hit.Position.X/1)*1, mouse.hit.Position.Y + preview.PrimaryPart.Size.Y/2, math.round(mouse.hit.Position.Z/1)*1)
local angles = CFrame.Angles(0, math.rad(rotateamount), 0)
preview:SetPrimaryPartCFrame(cframe * angles)
end
end
end)
uis.InputEnded:Connect(function(input, gameproccessed)
if input.KeyCode == Enum.KeyCode.R then
rotate = false
end
end)
runservice.RenderStepped:Connect(function()
if place == true then
mouse.TargetFilter = preview
if preview:FindFirstChild("MainPart") then
local cframe = CFrame.new(math.round(mouse.hit.Position.X/1)*1, mouse.hit.Position.Y + preview.PrimaryPart.Size.Y/2, math.round(mouse.hit.Position.Z/1)*1)
local angles = CFrame.Angles(0, math.rad(rotateamount), 0)
preview:SetPrimaryPartCFrame(cframe * angles)
end
end
end)
end)
tool.Activated:Connect(function()
if place == true then
place = false
event:FireServer(preview.Name, preview.PrimaryPart.CFrame)
preview:Destroy()
wait(.1)
reset()
end
end)
tool.Unequipped:Connect(function()
preview:Destroy()
end)
Where should I put the code?
local tool = script.Parent
local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local mouse = player:GetMouse()
local uis = game:GetService("UserInputService")
local runservice = game:GetService("RunService")
local place = false
local rotate = false
local rotateamount = 0
local preview
function reset()
if place == false then
place = true
preview = game.ReplicatedStorage.Folder[tool.Name]:Clone()
preview.Parent = workspace
for _, parts in ipairs(preview:GetDescendants()) do
if parts:IsA("BasePart") then
local boundingbox = Instance.new("SelectionBox")
boundingbox.Parent = parts
boundingbox.Adornee = parts
parts.CanCollide = false
end
end
end
end
tool.Equipped:Connect(function()
reset()
local rConn1, rConn2, rConn3
rConn1 = uis.InputBegan:Connect(function(input, gameProcessed)
if not gameProcessed then
if input.KeyCode == Enum.KeyCode.R then
rotate = true
rotateamount = rotateamount + 10
end
end
end)
rConn2 = uis.InputEnded:Connect(function(input, gameProcessed)
if input.KeyCode == Enum.KeyCode.R then
rotate = false
end
end)
rConn3 = uis.InputBegan:Connect(function(input, gameProcessed)
if not gameProcessed then
if input.UserInputType == Enum.UserInputType.MouseButton2 then
rotateamount = 0
end
end
end)
runservice:BindToRenderStep("ToolRenderStep", Enum.RenderPriority.First.Value, function()
if place then
mouse.TargetFilter = preview
local mainPart = preview:FindFirstChild("MainPart")
if mainPart then
local cframe = CFrame.new(math.round(mouse.Hit.Position.X / 1) * 1, mouse.Hit.Position.Y + mainPart.Size.Y / 2, math.round(mouse.Hit.Position.Z / 1) * 1)
local angles = CFrame.Angles(0, math.rad(rotateamount), 0)
mainPart.CFrame = cframe * angles
end
end
end)
end)
tool.Activated:Connect(function()
if place then
place = false
local event = game.ReplicatedStorage.RemoteEvent
event:FireServer(preview.Name, preview.PrimaryPart.CFrame)
preview:Destroy()
preview = nil
reset()
end
end)
tool.Unequipped:Connect(function()
if preview then
preview:Destroy()
preview = nil
end
end)
local PhysicsService = game:GetService("PhysicsService")
local block1 = game.Workspace.Block1
local block2 = game.Workspace.Block2
local hoveringThreshold = 1
local function areBlocksHovering(block1, block2)
local distance = (block1.Position - block2.Position).magnitude
return distance <= hoveringThreshold
end
local function toggleCollision(object1, object2, enableCollision)
local collisionGroupName = "collisiongroupname" -- set collision group name (optional)
local object1CollisionGroupId = PhysicsService:GetCollisionGroupId(object1.Name)
local object2CollisionGroupId = PhysicsService:GetCollisionGroupId(object2.Name)
if object1CollisionGroupId and object2CollisionGroupId then
local isCollisionEnabled = PhysicsService:CollisionGroupsAreCollidable(object1CollisionGroupId, object2CollisionGroupId)
if enableCollision and not isCollisionEnabled then
PhysicsService:CollisionGroupSetCollidable(collisionGroupName, object1.Name, object2.Name, true)
elseif not enableCollision and isCollisionEnabled then
PhysicsService:CollisionGroupSetCollidable(collisionGroupName, object1.Name, object2.Name, false)
end
end
end
local function updateHovering()
local hovering = areBlocksHovering(block1, block2)
toggleCollision(block1, block2, not hovering)
end
game:GetService("RunService").Heartbeat:Connect(updateHovering)
i merged it with the code you provided see if it works or not also i made some changes to the code due to being less efficient and made it more efficient and for you to underestand
you can put it on the same script but i recommend using another script for it to work as i suppose you are using a local script, physics service are only used in server scripts.
if you have anymore questions feel free to ask
It’s in a local script
yeah so you have to separate my part of the script to a server script in order to make it work
if you need to see if blocks collided with eachother you can call remotefunctions