How to detect if a part is fully within another part, when both parts have CanQuery off?

[Lua_Fool]

So I’m making a game where you can build things, and you build inside of a garage. But I only want the player to be able to build in a specific area. I have tried using GetPartsInPart but it doesn’t work, because the parts I’m working with have CanQuery turned off (long story). How can I still find out if the parts are fully within eachother?

[Tavikron (Octav)]

I think in this case some bound math is required, check for positions and account for part size aswell, rotation is another universe

[Lua_Fool]

How do I do this? I’m unfamiliar with vector math, so I don’t really know how to do something like this.

[RuinedSanctuary]

local params = overlapParams.new()
params.BruteForceAllSlow = true

local parts = workspace:GetPartsinPart(part:part, params)
-- try that I think..
-- or use seperate collision groups!

-- you'd set the collision groyp by doing
params.CollisionGroup = groupExample

--you could also try using the getBoundsinBounds method considering you're 
--making a building area

[THEXXGAMERGUY (MrBrrBoi)]

This, however, does not account for when the part is fully within another part. :GetPartsInPart() will return whenever there is any intersection of volume.

[Tavikron (Octav)]

Detect if Part FULLY Contains Another Part

Basically, what you’ll want to do is check each side of your cylinder to make sure its edges are in bounds of the part. What I do is check the unit direction of the edge of the base part compared to the edge of the other part. Since I suck at explaining things here are some images to illustrate what I mean: This example would be valid because the endpoint of the red line is within bounds of the green line. [RobloxScreenShot20220321_224034342] This example would be invalid because the end poi…

[Lua_Fool]

I have an idea on how to solve my problem: I have one bounds area, where the part should be, and multiple ‘anti bounds’ areas, where the part shouldn’t be. To detect if a part was FULLY in the bounds area, you could check that it both:

• Is touching the bounds area and
• Isn’t touching any anti-bounds areas.

I think this system should work, the only thing I’m confused on is how to find if any two parts are touching. Any ideas?

P.S, bear in mind that I can’t use anything that relies on CanQuery.

[Lua_Fool]

I’m trying to do collision detection using Touched and TouchEnded, but the system doesn’t work: It might be because the script this is in is local. Here it is:

local collectionService = game:GetService("CollectionService")
local antiBounds = collectionService:GetTagged("Bound")

for _, bound:Part in antiBounds do
	
	bound.Touched:Connect(function(otherPart)
		if otherPart.Name == "GhostPart" then
			print("ooo")
			bound:SetAttribute("IsGhostPartTouching", true)
		end
	end)
	
	bound.TouchEnded:Connect(function(otherPart)
		if otherPart.Name == "GhostPart" then
			print("ahhh")
			bound:SetAttribute("IsGhostPartTouching", false)
		end
	end)
end

As of now, the IsGhostPartTouching attribute on parts with the Bound tag is not being updated, and the console is empty.

EDIT: I’ve put the logic that detects whether the ghost part is touching or not in a remote function, and everything works now!