Grid placing system

Help and Feedback Scripting Support
#4

i’ve made something similar,try you cursor.Target.Position

script.Parent.Activated:connect(function()
	if a == 1 and val.Value > 0 then
		for i = 1,#blocks do
			if (blocks[i].Name == cursor.Target.Name) then
				v = true
			end
		end
		if ((v) and cursor.Target.ClassName == "Part" and (script.Parent.Handle.Position - cursor.hit.p).magnitude <= 15) then
			val.Value = val.Value - 1
			player.PlayerGui.ScreenGui.TextBox.Text = val.Value			
			a = 0


			if cursor.Target.Position.X + 1.5 == cursor.Hit.X then
				X = math.ceil(cursor.Hit.X) -(math.ceil(cursor.Hit.X) % 3) + 3
			else
				X = math.ceil(cursor.Hit.X) -(math.ceil(cursor.Hit.X) % 3)
			end
			if ((cursor.Hit.Y%0.5) == 0) then
				if cursor.Target.Position.Y + 1.5 == cursor.Hit.Y then
					Y = math.ceil(cursor.Hit.Y) - (math.ceil(cursor.Hit.Y) % 3) + 3
				else
					Y = math.ceil(cursor.Hit.Y) - (math.ceil(cursor.Hit.Y) % 3)
				end
			else
				Y = math.ceil(cursor.Hit.Y) - (math.ceil(cursor.Hit.Y) % 3)
			end
			if cursor.Target.Position.Z + 1.5 == cursor.Hit.Z then
				Z = math.ceil(cursor.Hit.Z) -(math.ceil(cursor.Hit.Z) % 3) + 3
			else
				Z = math.ceil(cursor.Hit.Z) -(math.ceil(cursor.Hit.Z) % 3)
			end
			requestPartEvent:FireServer(X,Y,Z,"lucky")

			a = 1
		end
	end
end)

1 Like
#5

Sorry if I’m missing something, but how should I modify your code to fit mine?

#6

Try this

script.Parent.Activated:connect(function()
		if  (game.ReplicatedStorage.block.Handle- cursor.hit.p).magnitude <= 15) then
			if cursor.Target.Position.X + 1.5 == cursor.Hit.X then
				X = math.ceil(cursor.Hit.X) -(math.ceil(cursor.Hit.X) % 3) + 3
			else
				X = math.ceil(cursor.Hit.X) -(math.ceil(cursor.Hit.X) % 3)
			end
			if ((cursor.Hit.Y%0.5) == 0) then
				if cursor.Target.Position.Y + 1.5 == cursor.Hit.Y then
					Y = math.ceil(cursor.Hit.Y) - (math.ceil(cursor.Hit.Y) % 3) + 3
				else
					Y = math.ceil(cursor.Hit.Y) - (math.ceil(cursor.Hit.Y) % 3)
				end
			else
				Y = math.ceil(cursor.Hit.Y) - (math.ceil(cursor.Hit.Y) % 3)
			end
			if cursor.Target.Position.Z + 1.5 == cursor.Hit.Z then
				Z = math.ceil(cursor.Hit.Z) -(math.ceil(cursor.Hit.Z) % 3) + 3
			else
				Z = math.ceil(cursor.Hit.Z) -(math.ceil(cursor.Hit.Z) % 3)
			end
	
		
		end
	end
end)

this might be wrong,because its been awhile since i did something like this

1 Like
#7

Just a quick fix, you have to distribute X, Y, and Z coordinates for each component of the new Vector3:

local function round(vector,grid) 
    return Vector3.new( 
        math.floor(vector.X/grid+.5)*grid, 
        math.floor(vector.Y/grid+.5)*grid, 
        math.floor(vector.Z/grid+.5)*grid 
    ) 
end 

round(mouse.Hit.Position,3)
3 Likes
Block placement system
#8

Thank you! That fixed it, it’s definitely a nice, simple solution.

1 Like
#9

Actually, this doesn’t work on two sides of the block. It places the block inside of the block I am pointing at.

Grid Placement System
#10

Try getting the normal from mouse.Hit using a ray and adding that to the original position:

-- services
local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Workspace = game:GetService("Workspace")

local player = Players.LocalPlayer
local block = ReplicatedStorage:WaitForChild("block")

-- how far you want the player to reach
local REACH = 100

local castParams = RaycastParams.new()

mouse.Button2Down:Connect(function()

	local unitRay = mouse.UnitRay

	castParams.FilterDescendantsInstances = { player.Character }

	-- automatically ignores the player's character
	
	local result = Workspace:Raycast(
		unitRay.Origin, unitRay.Direction * REACH,
		castParams
	)

	if result then
		local newBlock = block:Clone()
		newBlock.Position = round(result.Position + result.Normal * 1.5, 3)
		newBlock.Parent = Workspace
	end

end)
19 Likes
Help with Placement on Surface
#11

It works, finally! Thank you very much.

1 Like
#12

Sorry for bumping, but is this a local script or normal? And where would I put this?

#13

I’m making a similar system, but I don’t fully understand the Raycasting. Could you please explain how it works?

#14

This should be a local script, but if you want everyone to see the blocks you place, you should fire a remote to the server instead of creating the block client-side.

@Smartysaur11, if you’re talking about how Workspace:Raycast works, you can look at the Intro to Raycasting tutorial on the dev hub or check the API reference.

2 Likes
#15

Ty raycasting has always been one of the things that stumps me

1 Like
#16

Sorry to stir upp this again but im working on a similiar problem and am interested.

So, the round() function. What is that? I searched up ‘round() roblox’ and the best result I got was a function returning math.floor(n + 0.5) where n is the number. But here we are passing n as a vector3??? That screws with my head. To add to that what is the second parameter for? To round it to multiples of 3? If so how would that function look?

Thanks!

#17

If you look at some of the replies before my solution, you’ll see the round() function there.

And you guessed correctly on the second parameter :+1:

I guess I would rename the function to something like snapToGrid()? That could clear the confusion.

1 Like
#18

Sorry, I’m a little dumb, but

Why are you multiplying the result’s normal with 1.5? Is it like (studs / 2)?

#20

Sorry for bumping, but how would a Prediction Block system be made with this?
(EDIT: I’m still learning scripting btw)

#21

It’s the exact same way. Just make a clone which will be the prediction block and make it transparent.

#22

I mean something like BedWars or SkyWars where when you look in front of you, you can see a transparent block.

#23

I made this for my game.

It’s a bit buggy but it does the job done.

Place a Local Script in a Tool.

Place a Normal script in the tool.

Place a Folder named “PartsFolder” in the workspace and place all the parts you want in the map.

Place a Folder named “PartsPreview” in the workspace for the prediction block.

Place a Remote event named “PlaceBlock” in the tool

This is the code for the Local Script:

local PlaceBlockEvent = script.Parent.PlaceBlock

local equipped = false
local uis = game:GetService("UserInputService")
local mouse = game.Players.LocalPlayer:GetMouse()
local character = game.Players.LocalPlayer.Character or game.Players.LocalPlayer.CharacterAdded:Wait()
local cam = workspace.CurrentCamera


local function findClosestPart(preview)
	local lowestMagParts = {}
	local currentPart = nil
	local currentClosestDir = nil
	local currentClsoestmag = nil 
	for _,v in pairs(game.Workspace.PartsFolder:GetDescendants()) do
		if v:IsA("BasePart") then
			local magnitude1 = (character.PrimaryPart.Position - v.Position).Magnitude
			if magnitude1 <= 25 then
				table.insert(lowestMagParts, v)
			end
		end
	end
	local lowestMagnitude = nil
	for _,v in pairs(lowestMagParts) do
		if v:IsA("BasePart") then
			local mouse3DPos = character.PrimaryPart.Position + (mouse.Hit.Position - character.PrimaryPart.Position).Unit * (character.PrimaryPart.Position - v.Position).Magnitude
			local mag = (v.Position - mouse3DPos).Magnitude
			if not lowestMagnitude then
				lowestMagnitude = mag
				currentPart = v
				continue
			end
			if mag < lowestMagnitude then
				lowestMagnitude = mag
				currentPart = v
			end
		end
	end
	
		local surfaceIDs = {
			top = currentPart.Position + Vector3.new(0,25,0),
			bottom = currentPart.Position - Vector3.new(0,25,0),
			left = currentPart.Position - Vector3.new(25,0,0),
			right = currentPart.Position + Vector3.new(25,0,0),
			front = currentPart.Position - Vector3.new(0,0,25),
			back = currentPart.Position + Vector3.new(0,0,25),
		}



		for surfaceId, pos in pairs(surfaceIDs) do
			local mag = ((character.PrimaryPart.Position + (mouse.Hit.Position - character.PrimaryPart.Position).Unit * 25) - pos).Magnitude
			if not currentClsoestmag then
				currentClsoestmag = mag
				currentClosestDir = surfaceId
				continue
			end
			if mag < currentClsoestmag then
				currentClsoestmag = mag
				currentClosestDir = surfaceId
			end
		end
		if currentClosestDir ~= nil then
			table.clear(lowestMagParts)
			return currentPart, currentClosestDir
		end

end

local connection = nil

script.Parent.Equipped:Connect(function()
	if equipped == false then
		equipped = true
		local clonePreview = Instance.new("Part")
		clonePreview.Parent = game.Workspace:WaitForChild("PartsPreview")
		clonePreview.Name = script.Parent.Parent.Name.."Preview"
		clonePreview.Transparency = 1
		clonePreview.Size = Vector3.new(3,3,3)
		clonePreview.CanCollide = false
		clonePreview.Anchored = true
		local selection = Instance.new("SelectionBox", clonePreview)
		selection.Visible = true
		selection.Adornee = clonePreview
		selection.LineThickness = 0.05
		selection.Color3 = Color3.fromRGB(0,0,0)
		for _,v in pairs(game.Workspace.PartsPreview:GetChildren()) do
			if v ~= clonePreview then
				v:Destroy()
			end
		end
		mouse.TargetFilter = clonePreview
		task.defer(function()
			while wait() do
				if equipped == true then
					local mouseX,mouseY,mouseZ = mouse.Hit.X, mouse.Hit.Y, mouse.Hit.Z
					local mouseTarget = mouse.TargetSurface
					if mouse.Target ~= nil then
						if mouseTarget == Enum.NormalId.Top then
							clonePreview.CFrame = (CFrame.new(mouse.Target.Position + Vector3.new(0,3, 0))) --- the 3 is the size of the block
						elseif mouseTarget == Enum.NormalId.Bottom then
							clonePreview.CFrame = (CFrame.new(mouse.Target.Position - Vector3.new(0,3, 0))) --- the 3 is the size of the block
						elseif mouseTarget == Enum.NormalId.Left then
							clonePreview.CFrame = (CFrame.new(mouse.Target.Position - Vector3.new(3, 0,0))) --- the 3 is the size of the block
						elseif mouseTarget == Enum.NormalId.Right then
							clonePreview.CFrame = (CFrame.new(mouse.Target.Position + Vector3.new(3,0, 0))) --- the 3 is the size of the block
						elseif mouseTarget == Enum.NormalId.Front then
							clonePreview.CFrame = (CFrame.new(mouse.Target.Position - Vector3.new(0,0, 3))) --- the 3 is the size of the block
						elseif mouseTarget == Enum.NormalId.Back then
							clonePreview.CFrame = (CFrame.new(mouse.Target.Position + Vector3.new(0,0, 3))) --- the 3 is the size of the block
						end
					elseif mouse.Target == nil then
						local closestPart, direction = findClosestPart(clonePreview)
						if tostring(direction) == "top" then
							clonePreview.CFrame = (CFrame.new(closestPart.Position + Vector3.new(0,3, 0))) --- the 3 is the size of the block
						elseif tostring(direction) == "bottom" then
							clonePreview.CFrame = (CFrame.new(closestPart.Position - Vector3.new(0,3, 0))) --- the 3 is the size of the block
						elseif tostring(direction) == "left" then
							clonePreview.CFrame = (CFrame.new(closestPart.Position - Vector3.new(3,0,0))) --- the 3 is the size of the block
						elseif tostring(direction) == "right" then
							clonePreview.CFrame = (CFrame.new(closestPart.Position + Vector3.new(3,0, 0))) --- the 3 is the size of the block
						elseif tostring(direction) == "front" then
							clonePreview.CFrame = (CFrame.new(closestPart.Position - Vector3.new(0,0, 3))) --- the 3 is the size of the block
						elseif tostring(direction) == "back" then
							clonePreview.CFrame = (CFrame.new(closestPart.Position + Vector3.new(0,0, 3))) --- the 3 is the size of the block
						end
						closestPart = nil
						direction = nil
					end	
				end
			end
		end)

		connection = mouse.Button1Down:Connect(function()
			if equipped == true then
				for _,v in pairs(game.Workspace:WaitForChild("PartsFolder"):GetDescendants()) do
					if v:IsA("BasePart") then
						if clonePreview.Position == v.Position then
							return
						end
					end
				end

				local primaryPart = clonePreview.CFrame
				PlaceBlockEvent:FireServer(primaryPart)
			end

		end)
	end
end)

script.Parent.Unequipped:Connect(function()
	if equipped == true then
		equipped = false
		if workspace.PartsPreview:FindFirstChild(script.Parent.Parent.Name.."Preview") then
			local preview = workspace.PartsPreview:FindFirstChild(script.Parent.Parent.Name.."Preview")
			preview:Destroy()
		end
	end
	connection:Disconnect()
	connection = nil
end)

Here is the code for the Normal script:

local event = script.Parent.PlaceBlock
local part = game.ReplicatedStorage:WaitForChild("Wood Plank") ---- name of the part in the replicated storage you want to clone for the block placement system

event.OnServerEvent:Connect(function(plr, pos)
	local Clone = part:Clone()
	Clone.Parent = game.Workspace:WaitForChild("PartsFolder")
	Clone.CFrame = pos
end)

This is my first time making a reply so let me know if you have problems!

2 Likes
How To Make A Placement/Building System Like ROBLOX Bedwars/Islands
#24

Also here’s a video clip of the tool. It’s a bit lag since I’m on a laptop

robloxapp-20220302-2138143.wmv (3.4 MB)