How to detect if the ENTIRE object is inside a part

[LucasGamesz_YT (LucasGamesz)]

I’m making a building system and I did a code to make the object unplacable if it is outside of the part called “Area”, the code currently detect if a piece of the object is inside the area. This is the code:

local function insideArea()
	local plr = game.Players.LocalPlayer
	local buildArea = "ConstructionArea"..plr.Area.Value
	local max = 0
	local previewObject = workspace.PreviewObject
	local blockTable = {
		workspace.PreviewObject;
	}
	
	local params = OverlapParams.new()
	params.CollisionGroup = "Default"
	params.FilterDescendantsInstances = blockTable
	params.FilterType = Enum.RaycastFilterType.Whitelist
	params.MaxParts = max
	
	local area = workspace.Areas[buildArea].Base.Area
	
	local count = 0
	
	for i,v in pairs (previewObject:GetDescendants()) do
		if v:IsA("BasePart") then
			count = count + 1
		end
	end
	
	if count ~= 0 then
	local resultTable = workspace:GetPartBoundsInBox(area.CFrame,area.Size,params)
	if #resultTable >= count then
		return true
	else
		return false
	end
	end
end

The blue is the “Area” part, the part that the object has to be touching to can be placed. How I mentioned above, I want that the entire object need to touch, and not just a piece.

[iNazgxl]

Create 2 points with something that can be touched (maybe a part, or something else if you don’t like using parts for that kind of thing), one at the top left of the model and one at the bottom right. Require both of them to be inside of the area for the model to be placeable.

I’ll let you figure out how to do it as it’s probably better for you to do it how you want it and to play around with it so it works for you.

Hope this helps.

[Askavix]

You could calculate the 8 corners of the bounding box of the couch.
Then check if each of the corners x,y,z position values are within your designated area’s 8 corners.
Assuming all of these are cuboids and not other kinds of shapes.

[LucasGamesz_YT (LucasGamesz)]

It worked, but I’m looking for script solutions, cuz I don’t wanna have to create two parts in each object. If there’s no other way I’m gonna use that.
I think that might be possible make a script detecting the top left and bottom right of a part (the hitbox part that i put on every object)

[LucasGamesz_YT (LucasGamesz)]

How can I do this???

[Askavix]

Check if point is within a bounding region

Hey! For various tasks, I need to check if a point is contained within a rectangular region (defined by two points) function IsInRegion(Pos,A,B) return (Pos.X < math.max(A.X,B.X) and Pos.X > math.min(A.X,B.X)) and (Pos.Y < math.max(A.Y,B.Y) and Pos.Y > math.min(A.Y,B.Y)) and (Pos.Z < math.max(A.Z,B.Z) and Pos.Z > math.min(A.Z,B.Z)) end Here is my code - but unfortunately, it seems to have some sort of logical flaw which I’m unable to mitigate. Is there any pre-built system that might work, or …

Use the function in the first post of this. And check if each of your corners (Pos in the function) are within the two corners of your designated area (A, B)

[LucasGamesz_YT (LucasGamesz)]

I used iNazgxl’s solution, but I made it a script, with the help of this post
Here’s the new script for who wants:

function getCorners(part) --by post
	local cf = part.CFrame
	local size = part.Size
	local corners = {}
	local frontFaceCenter = (cf + cf.LookVector * size.Z/2)
	local backFaceCenter = (cf - cf.LookVector * size.Z/2)
	local topFrontEdgeCenter = frontFaceCenter + frontFaceCenter.UpVector * size.Y/2
	local bottomFrontEdgeCenter = frontFaceCenter - frontFaceCenter.UpVector * size.Y/2
	local topBackEdgeCenter = backFaceCenter + backFaceCenter.UpVector * size.Y/2
	local bottomBackEdgeCenter = backFaceCenter - backFaceCenter.UpVector * size.Y/2
	corners.topFrontRight = (topFrontEdgeCenter + topFrontEdgeCenter.RightVector * size.X/2).Position
	corners.topFrontLeft = (topFrontEdgeCenter - topFrontEdgeCenter.RightVector * size.X/2).Position
	corners.bottomFrontRight = (bottomFrontEdgeCenter + bottomFrontEdgeCenter.RightVector * size.X/2).Position
	corners.bottomFrontLeft = (bottomFrontEdgeCenter - bottomFrontEdgeCenter.RightVector * size.X/2).Position
	corners.topBackRight = (topBackEdgeCenter + topBackEdgeCenter.RightVector * size.X/2).Position
	corners.topBackLeft = (topBackEdgeCenter - topBackEdgeCenter.RightVector * size.X/2).Position
	corners.bottomBackRight = (bottomBackEdgeCenter + bottomBackEdgeCenter.RightVector * size.X/2).Position
	corners.bottomBackLeft = (bottomBackEdgeCenter - bottomBackEdgeCenter.RightVector * size.X/2).Position
	return corners
end
local function checkArea()
	local plr = game.Players.LocalPlayer
	local buildArea = "ConstructionArea"..plr.Area.Value
	local max = 0
	local previewObject = workspace.PreviewObject
	local blockTable = {}
	for cornerName, cornerPos in pairs(getCorners(previewObject.Hitbox)) do
		if not previewObject.Hitbox.Corners:FindFirstChild(cornerName) then
		local part = Instance.new("Part") -- create the part in the corner position of my model's hitbox
		part.Name = cornerName
		part.Position = cornerPos
		part.Anchored = true
		part.Transparency = 1
		part.Size = Vector3.new(0.1,0.1,0.1)
		part.Parent = previewObject.Hitbox.Corners
		table.insert(blockTable,part)
		elseif previewObject.Hitbox.Corners:FindFirstChild(cornerName) then
			blockTable[previewObject.Hitbox.Corners[cornerName]] = nil
			previewObject.Hitbox.Corners[cornerName]:Destroy()
			local part = Instance.new("Part") --re-create the block each 0.1 seconds
			part.Name = cornerName
			part.Position = cornerPos
			part.Anchored = true
			part.Transparency = 1
			part.Size = Vector3.new(0.1,0.1,0.1)
			part.Parent = previewObject.Hitbox.Corners
			table.insert(blockTable,part)
		end
	end

	local params = OverlapParams.new()
	params.CollisionGroup = "Default"
	params.FilterDescendantsInstances = blockTable
	params.FilterType = Enum.RaycastFilterType.Whitelist
	params.MaxParts = max

	if workspace.Areas:FindFirstChild(buildArea) then
	local area = workspace.Areas[buildArea].Base.Area
	local count = #blockTable
	
	if count ~= 0 then
		local resultTable = workspace:GetPartBoundsInBox(area.CFrame,area.Size,params)
		if #resultTable >= count then
			return true
		else
			return false
		end
		end
	end
end

while true do
wait(0.1)
local hitbox = workspace.PreviewObject.Hitbox -- hitbox
checkArea(hitbox)
-- rest of the code (change color)
end

[ivan866_z]

this solution should work for objects of any shape, not just orthogonal ones

• take your container, create a bigger one overlapping it completely
• do a negation of those two, you will get a new container volume which lacks the volume of the first one

fast version

• check for GetPartBoundsInBox(myPart:GetPivot(), myPart:GetSize(), olap); if result contains container2, that highly likely means your part touches the bigger container, although false positive is possible especially for tilted and concave objects

precise version (requires physical simulation)

• clone and move all mentioned parts and containers behind the borders of your playing area
• set Anchored to false and subscribe for Touched event; if container2 immediately reports touching your part, that is a positive; otherwise, cancel the simulation and destroy all cloned parts