Help Needed: Adding Collision Response

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#1

Hello everyone,

I’m currently working on a project in Roblox Studio and need some help with adding collision response to my local script. I’ve created a bounding box that detects collisions, but I’m struggling to implement a proper response when a collision is detected. Any advice or guidance would be greatly appreciated!

Current Script:

Here’s the code I have so far:

local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local rootPart = character:WaitForChild("HumanoidRootPart")
local boundingBoxPart = Instance.new("Part")

local function createBoundingBox()
	local size = Vector3.new(2.5, 5, 2.5)
	local region = Region3.new(rootPart.Position - size / 2, rootPart.Position + size / 2)

	boundingBoxPart.Size = size
	boundingBoxPart.Anchored = true
	boundingBoxPart.CanCollide = false
	boundingBoxPart.Transparency = 0.5
	boundingBoxPart.Color = Color3.new(0, 1, 0)
	boundingBoxPart.CFrame = CFrame.new(rootPart.Position + Vector3.new(0, -0.5, 0))
	boundingBoxPart.Parent = workspace

	local ignoreList = {character, boundingBoxPart}

	local partsInRegion = workspace:FindPartsInRegion3WithIgnoreList(region, ignoreList, math.huge)
	for _, part in ipairs(partsInRegion) do
		if part and part.Parent ~= character then
			print("Bounding box hit: " .. part.Name)
			local rayOrigin = rootPart.Position
			local rayDirection = (part.Position - rayOrigin).unit * 10
			local raycastParams = RaycastParams.new()
			raycastParams.FilterDescendantsInstances = ignoreList
			raycastParams.FilterType = Enum.RaycastFilterType.Exclude

			local raycastResult = workspace:Raycast(rayOrigin, rayDirection, raycastParams)
			if raycastResult then
				local hitNormal = raycastResult.Normal
				print("Hit normal: " .. tostring(hitNormal))
			end
		end
	end
end

game:GetService("RunService").RenderStepped:Connect(function()
	createBoundingBox()
end)

obviously the bounding box is for visualization

1 Like
#2

I dont fully understand what you need help for.
You could use a touched event, maybe?

boundingBoxPart.Touched:Connect(function()
-- Put code here
end)
#3

basically what i want to know is how to add a collision response to when the raycast detects something, the bounding box is just there for visualization(for debug/testing purposes), i couldn’t think of a approach to adding collision response like source engine’s(TF2, HL2, etc) character controller’s collision and hitbox

#4

Do you mean like pushing the object, or detecting whether or not the object has been hit?

#5

detecting whether or not the object has been hit, it does detect parts and everything, it just needs collision response to the rootpart