Part's Magnitude Including Size?

see what ever parts is close to base INCLUDING SIZE like if part.Size = Vector3.new(9,20,2) if part magnitude is close to part in that size,or like if u making a kamehameha and the beam goes forward it dont only check the middle point if the part extends it gets the front to bck magnitude and runs script

Haven't been able to test it but this should theoretically work, assuming that the parts are rectangular

FYI I only answered this because I wanted to know how to do this also, and I don't think anybody would have ever answered this question because of the request site thing.

local lowestMagnitude = 10000
local partWithMagnitude = nil
local part = game.Workspace.Part

local function goThroughParts(v)
	if #v:GetChildren() ~= 0 then
		for i, v2 in pairs(v:GetChildren()) do
			goThroughParts(v2)
		end
	end
	if v:IsA("Part") then -- This is where it actually does the comparison based on size
		local p = v.Position
		local s = v.Size
		local function getClosest(i, j, k, l)
			if (i + j > k + l and i - j < k + l) or 
				(i + j > k - l and i - j > k - l) then
				return 0, 0
			elseif(i + j < k - l) then
				return i + j, k - l
			elseif(i - j > k + l) then
				return i - j, k + l
			end
		end
		local closestX, closestPartX = getClosest(p.X, s.X / 2, part.Position.X, part.Size.X / 2)
		local closestY, closestPartY = getClosest(p.Y, s.Y / 2, part.Position.Y, part.Size.Y / 2)
		local closestZ, closestPartZ = getClosest(p.Z, s.Z / 2, part.Position.Z, part.Size.Z / 2)
		local magnitude = (Vector3.new(closestX, closestY, closestZ) - Vector3.new(closestPartX, closestPartY, closestPartZ)).magnitude
		if magnitude > lowestMagnitude then
			lowestMagnitude = magnitude
			partWithMagnitude = v
		end
	end
end
for i,v in pairs(workspace:GetChildren()) do
	goThroughParts(v)
end
print(partWithMagnitude)