Block grid placement help

Help and Feedback Scripting Support
#1

I have this block of code which makes a block follow your mouse in a grid

local runservice = game:GetService("RunService")
local UserInputService = game:GetService("UserInputService")
local block = game.Workspace:WaitForChild("Block")
local camera = game.Workspace.CurrentCamera
local cameraPart = game.Workspace.camerapart

local gridSize = 3

local castParams = RaycastParams.new()
castParams.FilterType = Enum.RaycastFilterType.Exclude
castParams.FilterDescendantsInstances = {block, cameraPart}

local function roundToGrid(n, grid)
	return math.floor((n + grid / 2) / grid) * grid
end

local function followMouse()
	local mouseLocation = UserInputService:GetMouseLocation()
	local unitRay = camera:ViewportPointToRay(mouseLocation.X, mouseLocation.Y)
	local cast = workspace:Raycast(unitRay.Origin, unitRay.Direction * 1000, castParams)

	if cast then
		local x = roundToGrid(cast.Position.X, gridSize)
		local z = roundToGrid(cast.Position.Z, gridSize)
		

		block.Position = Vector3.new(x, 2.5, z)
	end
end

And I have a grid pattern on the floor of my game. I want my block to follow the grid pattern. my pattern looks like this:
image

And as you can see my part is not following the grid pattern:
image

Is there i way i can fix this?

#2

just offset ur grid pattern by half tile

#3

that doesnt work is there any other way

#4

by doing the same on grid formula, multiply grid size by 0.5

return math.floor((n + grid * 0.5) / grid * 0.5) * grid
this should do it probably

#5

now the block is just offsetted from my mouse??

image

#6

return math.floor((n + grid / 2) / grid + 0.5) * grid
this perhaps

#7

image
still, doesnt work

#8

return math.floor((n + grid / 2) / grid + 0.5) * grid

#9

image

I dont think this whole approach is gonna work

#10

There’s nothing wrong with your grid alignment code to begin with. the problem is that those black & white tiles themselves aren’t aligned to the grid. You need to move those tiles so that they are aligned.

#11

bruh then go and do basic worst math and do this
return math.floor((n + grid / 2) / grid + 0.5) * grid + grid / 2

#12

Would there be a way to do something else? like make the part relative to the tiles position or something like that or is that the only way

#13

You could try getting the tile at the top left corner, converting the mouse position to a location relative to that tile (tile.CFrame:PointToObjectSpace(cast.Position)), align that position to the grid, and then convert it back to world space (tile.CFrame:PointToWorldSpace(alignedPosition)).

#14

why don’t you use mouse.Target?

local players = game:GetService("Players")

local player = players.LocalPlayer
local mouse = player:GetMouse()

local tilesFolder = --Folder with your tiles
local tileSize = tilesFolder:FindFirstChildOfClass("Part").Position.X
local heightOffet = CFrame.new(0, (tileSize.X/ 2) + (tileSize.Y/ 2), 0)

local blockPart = Instance.new("Part")
blockPart.Anchored = true
blockPart.CanCollide = false
blockPart.Size = Vector.new(tileSize, tileSize, tileSize)
blockPart.Parent = workspace


mouse.Button1Down:Connect(function()
--
local target = mouse.Target
--
if target.Parent ~= blocksFolder then return end
--
blockPart.CFrame = target.CFrame * heightOffset
--
end

(Created on mobile, errors/ bugs could be present)