function widget:Initialize()
	myPlayerID = GetMyPlayerID()
	combatFilter = {}
	builderFilter = {}
	buildingFilter = {}
	mobileFilter = {}

	for udid, udef in pairs(UnitDefs) do
		local mobile = (udef.canMove and udef.speed > 0.000001)
		local builder = (udef.canReclaim and udef.reclaimSpeed > 0) or
						(udef.isBuilder and udef.buildSpeed > 0) or
						(udef.canResurrect and udef.resurrectSpeed > 0) or
						(udef.canRepair and udef.repairSpeed > 0)
		local building = (mobile == false)
		local nonCombatTransport = (udef.transportCapacity > 0)
		local combat = (builder == false) and (nonCombatTransport == false) and (mobile == true) and (#udef.weapons > 0)

		combatFilter[udid] = combat
		builderFilter[udid] = builder
		buildingFilter[udid] = building
		mobileFilter[udid] = mobile
	end
end