Height of a part

Help and Feedback Scripting Support
#1

I am currently working on a building tool, and am facing a problem with placing parts that are something else than just a cube. So I have came up with a possible solution: The game would calculate the height/thickness/length of a part. The problem is, I don’t know how to get these properties with my current script. Let’s say I want to get the height property of a part.

image
image1139×480 17.7 KB

In this image, that is just a regular part, and the height property would be the Size.Y value of a part. However, my building tool utilizes rotation, and when that same part is rotated, the desired height value (dhv for short) would no longer by the Size.Y value and instead will be Z (or X, depending on how the part is rotated).
image
image1138×478 16.9 KB

Now, I don’t know how would I change the desired height/thickness/length value of a part depending on its rotation. Are there any methods for like take the size property of the part depending on the world root and not the root of a part?

#2

You could calculate what the “apparent topSide” is by comparing the face normal with vector3.new(0,1,0)

I am thinking about something like this:

local CF  = part.CFrame
local normals = {CF.XVector, CF.YVector, CF.ZVector}


for i, v in ipairs(normals) do
 UpAmount = result.normal:Dot(vector3.new(0,1,0))
 if UpAmount > 0.4 then
  --it is topside 
 end
end
#3

That might work, but would be quite complicated I believe.

#4

what makes you think so?

I would very much appreciate a bit more context about this tool and how it works, perhaps some examples in-game

#5

Ok, here is the current script Im using. It works just perfectly with cubes, but with other shapes, it is not that awesome, as the parts are partically fazing through others. The script is paranted to the tool, which also holds blockHolo and Block

local ContextActionService = game:GetService("ContextActionService")
local players = game.Players
local player = players.LocalPlayer 

local tool = script.Parent
local block = tool.Block
local holo = tool.BlockHolo
local mouse = player:GetMouse()

local connection = mouse.Move:Connect(function() -- Display
	local mousePosition = Vector3.new(math.round(mouse.Hit.Position.X), math.round(mouse.Hit.Position.Y), math.round(mouse.Hit.Position.Z))

	local target = mouse.Target
	local targetSurface = mouse.TargetSurface

	if targetSurface == Enum.NormalId.Top then
		holo.Position = mousePosition + target.CFrame.UpVector	
	elseif targetSurface == Enum.NormalId.Bottom then
		holo.Position = mousePosition - target.CFrame.UpVector
	elseif targetSurface == Enum.NormalId.Front then
		holo.Position = mousePosition + target.CFrame.LookVector
	elseif targetSurface == Enum.NormalId.Back then
		holo.Position = mousePosition - target.CFrame.LookVector
	elseif targetSurface == Enum.NormalId.Right then
		holo.Position = mousePosition + target.CFrame.RightVector
	elseif targetSurface == Enum.NormalId.Left then
		holo.Position = mousePosition - target.CFrame.RightVector
	end
end)

local function RotateAndPlace(actionName, inputState, inputObject) -- Rotate
	if inputObject.KeyCode == Enum.KeyCode.R and inputState == Enum.UserInputState.Begin then
		holo.CFrame = holo.CFrame * CFrame.Angles(0, math.rad(90), 0)
	elseif inputObject.KeyCode == Enum.KeyCode.T and inputState == Enum.UserInputState.Begin then
		holo.CFrame = holo.CFrame * CFrame.Angles(0, 0, math.rad(90))
	elseif inputObject.UserInputType == Enum.UserInputType.MouseButton1 and inputState == Enum.UserInputState.Begin then
		local clone = holo:Clone()
		clone.Transparency = 0
		clone.Parent = workspace.PlayerStructures
		clone.Name = "Block"
		clone.CanCollide = true
		clone.Anchored = false
		local weld = Instance.new("WeldConstraint")
		weld.Parent = clone
		weld.Part0 = clone
		weld.Part1 = mouse.Target
	end
end

tool.Equipped:Connect(function()
	ContextActionService:BindAction("Rotate and Place", RotateAndPlace, false, Enum.KeyCode.R, Enum.KeyCode.T, Enum.UserInputType.MouseButton1)
	holo.Transparency = 0.5
end)

tool.Unequipped:Connect(function()
	ContextActionService:UnbindAction("Rotate and Place")
	holo.Transparency = 1
end)
#6

wait. all you want to do is place parts, right?

Then you should just use Shapecast

by doing so you will get the exact position where you want to place your object without even doing the math yourself. Just let the computer do it

#7

Isn’t the shapecast is just a cast of a part with the given position as its center?

#8

Shapecast is a raycast but with volume

#9

This might help, thank you, I guess.

And sorry for late reply