Get Nearest Target

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#1

So I have this script that gets the nearest target but it doesn’t seem to get the nearest target. Am I doing something wrong here?

local npcs = workspace:WaitForChild("Npcs")
local currentTarget = nil

local rayCaycastParams = RaycastParams.new()
rayCaycastParams.FilterDescendantsInstances = {npcs}
rayCaycastParams.FilterType = Enum.RaycastFilterType.Whitelist
rayCaycastParams.IgnoreWater = true

local function castRay()
	local nearestDistance = math.huge

	for i,v in ipairs(npcs:GetChildren()) do
		if v.PrimaryPart ~= nil then
			local rayOrigin = character.PrimaryPart.Position
			local rayDestination = v.PrimaryPart.Position
			local rayDirection = (rayDestination - rayOrigin)
			local raycastResult = workspace:Raycast(rayOrigin, rayDirection, rayCaycastParams)
			
			local human = v:FindFirstChildWhichIsA("Humanoid")

			if raycastResult and human and human.Health > 0 then
				local distance = math.floor(raycastResult.Distance)
				if distance < nearestDistance and currentTarget == nil then
					currentTarget = v
					nearestDistance = distance
					return true, raycastResult.Position, distance
				end
			end
		end
	end
	currentTarget = nil
	return false, nil, nil
end

local function findTarget()
	local checkRay, position, distance = castRay()

	if checkRay == true and currentTarget ~= nil then
     -- stuff
	end
end
#2

I’m a little confused, are you trying to get the nearest person in front of the player or around the player?

#3

I want my NPC to get the nearest NPC. I want to get the nearest target around the NPC.

#4

You should probably read what raycast is because it is essentially a straight line going in the direction you choose. You should use magnitude instead to get objects within a radius.

local MaxRadius = 10 -- Studs
local Position1 = Character.HumanoidRootPart.Position
local Position2 = NPC.HumanoidRootPart.Position

if (Position1 - Position2).Magnitude <= MaxRadius then
     print("NPC Is In Radius")
end
#5

What if there is a giant NPC? Would it do the same as raycasting?

#6

raycast detects objects within a straight line. Magnitude detects objects within a circle(radius).

#7

So this goes in a straight line?

local rayOrigin = character.PrimaryPart.Position
local rayDestination = v.PrimaryPart.Position
local rayDirection = (rayDestination - rayOrigin)
local raycastResult = workspace:Raycast(rayOrigin, rayDirection, rayCaycastParams)
#8

yes.
you can use magnitude to check if position2 is within the radius of position1.

#9

I fixed it with this:

local npcs = workspace:WaitForChild("Npcs")
local currentTarget = nil

local rayCaycastParams = RaycastParams.new()
rayCaycastParams.FilterDescendantsInstances = {npcs}
rayCaycastParams.FilterType = Enum.RaycastFilterType.Whitelist
rayCaycastParams.IgnoreWater = true

local function castRay()
	local nearestDistance = math.huge

	for i,v in ipairs(npcs:GetChildren()) do
		local human = v:FindFirstChildWhichIsA("Humanoid")
		
		if v.PrimaryPart ~= nil and human and human.Health > 0 then
			local rayOrigin = character.PrimaryPart.Position
			local rayDestination = v.PrimaryPart.Position
			local rayDirection = (rayDestination - rayOrigin)
			local raycastResult = workspace:Raycast(rayOrigin, rayDirection, rayCaycastParams)

			if raycastResult then
				local distance = math.floor(raycastResult.Distance)
				if distance < nearestDistance and currentTarget == nil then
					currentTarget = v
					nearestDistance = distance
					return true, raycastResult.Position, distance
				end
			end
		else
			currentTarget = nil
		end
	end
	currentTarget = nil
	return false, nil, nil
end

local function findTarget()
	local checkRay, position, distance = castRay()

	if checkRay == true and currentTarget ~= nil then
      -- stuff
	end
end
1 Like
#10

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