Grid placement system only functions on 3 angles

Help and Feedback Scripting Support
#1

https://gyazo.com/f92f4afe7e5eea1d1d23bc8ec2cc7e2d
^^^
In this video, you can see i can only place a block on the right, top and forward of it, here is my grid placement code.

part.Position = Grid
part.Parent = workspace

Anyone know why this happens / a soloution to it? It’s just a test project i had fun with, but i ran into an issue.

#2

can u post a piece of your code where u detect what surface the mouse is pointing at

#3 
script.Parent.RemoteEvent.OnServerEvent:Connect(function(player,HIT,orig)
	local char = script.Parent
	local params = RaycastParams.new()
	params.FilterType = Enum.RaycastFilterType.Blacklist
	params.FilterDescendantsInstances = {char}
	local dir = (HIT.Position - orig).Unit
	local ray = workspace:Raycast(orig,dir*100,params)
	if ray then
		if mode then
			local part = Instance.new("Part")
			part.Name = "Placeable"
			part.Material = Material
			part.Color = Color
			part.Transparency = Transparency
			local GridSize = 3 --> Amount of studs it will move on a grid.
			part.Size = Vector3.new(GridSize,GridSize,GridSize)
			part.Anchored = true

			local Grid = Vector3.new(math.floor(ray.Position.X/GridSize+.5)*GridSize, math.floor(ray.Position.Y/GridSize+.5)*GridSize, math.floor(ray.Position.Z/GridSize+.5)*GridSize)
			part.Position = Grid
			part.Parent = workspace
		else
			if ray.Instance.Name == "Placeable" then
				ray.Instance:Destroy()
			end
		end
	end
end)

You mean this? (raycasting)

#4

well u can make a brand new mechanic for placing when the mouse.Target is an already placed Part
u can use mouse.TargetSurface to get the surface and then use it to get the Surface Vector after that u just set the position of the new part to the position of the part plus the Surface Vector multiplied by the GridSize.

#5

it will look something like this


local function GetVectorFromSurface(Surface,part)
	local Vectors = {
		[Enum.NormalId.Front] = part.CFrame.LookVector,
		[Enum.NormalId.Back] = -part.CFrame.LookVector,
		[Enum.NormalId.Left] = -part.CFrame.RightVector,
		[Enum.NormalId.Right] = part.CFrame.RightVector,
		[Enum.NormalId.Top] = part.CFrame.UpVector,
		[Enum.NormalId.Bottom] = -part.CFrame.UpVector
	}
	
	return Vectors[Surface]
end

local GridSize = 3
Remote.OnServerEvent:Connect(function(plr,MouseTarget,MouseTargetSurface,)
    if MouseTarget:IsDescendantOf(workspace.PartsFolders) then
       local newPart = Instance.new("Part",workspace.PartsFolders)
       newPart.Size = Vector3.new(GridSize,GridSize,GridSize)
       newPart.Position += GetVectorFromSurface(MouseTargetSurface,MouseTarget) * GridSize 
    end
end)
#6

Can’t you just use ray.Normal?

#7

u can also do that too lol
(limit limit)

#8

They work the same right? Because that would be best with my current system.

#9

Yeah, that’s exactly what I would do.

I would also multiply the normal by GridSize / 2 so the estimated point is as close to the center as possible, but that’s just nitpicking.

Also, similar thread:

#10

It’s erroring even tho i did the same exact thing as you, just a bit different.
image
image

#11

can u pass the Mouse.TargetSurface trought the remote
and replace the ray.Normal with it i just realised ray.Normal returns vector and not NormalId

#12

oh alright lemme do that
(LIMITSSSSSSS)

#13

Update, it has some very weird behaviour now.
https://gyazo.com/c4fb8a250ed93c72fd76c2ac755adab1
Basically, it works for the angles that didn’t work, but now it extends it by one gridsize when it’s on the angles that did work.

script.Parent.RemoteEvent.OnServerEvent:Connect(function(player,HIT,orig,surface)
	local char = script.Parent
	local params = RaycastParams.new()
	params.FilterType = Enum.RaycastFilterType.Blacklist
	params.FilterDescendantsInstances = {char}
	local dir = (HIT.Position - orig).Unit
	local ray = workspace:Raycast(orig,dir*100,params)
	if ray then
		if mode then
			local part = Instance.new("Part")
			part.Name = "Placeable"
			part.Material = Material
			part.Color = Color
			part.Transparency = Transparency
			local GridSize = 3 --> Amount of studs it will move on a grid.
			part.Size = Vector3.new(GridSize,GridSize,GridSize)
			part.Anchored = true
			local Grid = Vector3.new(math.floor(ray.Position.X/GridSize+.5)*GridSize, math.floor(ray.Position.Y/GridSize+.5)*GridSize, math.floor(ray.Position.Z/GridSize+.5)*GridSize)
			part.Position = Grid
			part.Parent = workspace.PartsFolders
			if ray.Instance.Name == "Placeable" then
				part.Position += GetVectorFromSurface(surface,ray.Instance) * GridSize
			else
				part.Position = Grid
			end
		else
			if ray.Instance.Name == "Placeable" then
				ray.Instance:Destroy()
			end
		end
	end
end)

^^^this code

#14

Okay, so i ended up just checking if the surface normal was either of those 3 angles, and then made the part.Position += ray.Normal * GridSize, and that worked