Problem with Structure dragging

Help and Feedback Scripting Support
,
#1

I made a structure placement system that is works fine… almost
theres 1 issue that i don’t know what to do with it in the video as u can see i cannot place
side of the wall because scripts defects as it will be inside of the wall

robloxapp-20250221-0241059.wmv (3.8 MB)

local RunService = game:GetService("RunService")
local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")

local LocalInput = require(script.Parent.Parent.LocalInput)
local LocalPlayer = Players.LocalPlayer
local Mouse = LocalPlayer:GetMouse()

local Model = ReplicatedStorage:WaitForChild("Sellables").Structures.Part.Model

local gridSize = 0.5 

--------------------------[[ Functions ]]--------------------------

function PrepareModel()
	local NewModel = Model:Clone()
	NewModel.Parent = workspace

	local Highlight = Instance.new("Highlight", NewModel)
	Highlight.Adornee = NewModel
	Highlight.Name = "StructureHighlight"

	for _, part in ipairs(NewModel:GetChildren()) do
		if part:IsA("Part") then
			part.CanCollide = false
			part.CanTouch = false
			part.CanQuery = false
		end
	end

	return NewModel
end

function ConvertToGridSize(mousePosition, HeightSize)
	local newX = math.round(mousePosition.X / gridSize) * gridSize
	local newZ = math.round(mousePosition.Z / gridSize) * gridSize
	local newY = math.round(mousePosition.Y / gridSize) * gridSize
	local newCFrame = CFrame.new(newX, newY + (HeightSize / 2), newZ)
	return newCFrame
end

function IsPositionValid(model, newCFrame)
	if not model.PrimaryPart then return false end

	local primaryPart = model.PrimaryPart
	local size = primaryPart.Size * 0.98 
		
	local region = Region3.new(newCFrame.Position - size / 2, newCFrame.Position + size / 2)

	local overlapParams = OverlapParams.new()
	overlapParams.FilterType = Enum.RaycastFilterType.Exclude
	overlapParams.FilterDescendantsInstances = {Players, model}

	local parts = game.Workspace:FindPartsInRegion3(region, overlapParams)

	return #parts == 0
end

function MoveStructure()
	local NewModel = PrepareModel()
	local modelHeight = NewModel.PrimaryPart.Size.Y 

	while true do
		local mousePosition = Mouse.Hit.Position
		local NewCFrame = ConvertToGridSize(mousePosition, modelHeight)

		if IsPositionValid(NewModel, NewCFrame) then
			NewModel:SetPrimaryPartCFrame(NewCFrame)
			NewModel.StructureHighlight.FillColor = Color3.fromRGB(0, 255, 0)
		else
			NewModel.StructureHighlight.FillColor = Color3.fromRGB(255, 0, 0)
		end

		RunService.RenderStepped:Wait()
	end
end

--------------------------[[ Inputs ]]--------------------------

LocalInput.moveStructure(MoveStructure)

Please help!

#2

It looks like you can only place on top surfaces. Is that what you want or do you also want it to be able to place the edge against a wall off the ground?

#3

Yes i can place in top surfaces also i wanna place in side surfaces without part going to inside of it