Fix issue #24: cancel not removing periodic timers.

README.md

@@ -7,7 +7,7 @@ Contents:
 ------------
 
 *   *gamestate.lua*: Easy gamestate management.
-*   *timer.lua*: Delayed and time-limited function calls.
+*   *timer.lua*: Delayed and time-limited function calls and tweening functionality.
 *   *vector.lua*: 2D vector math.
 *   *vector-light.lua*: Lightweight 2D vector math (for optimisation purposes - leads to potentially ugly code).
 *   *class.lua*: Lightweight object orientation (class or prototype based).

timer.lua

@@ -60,15 +60,16 @@ function Timer:add(delay, func)
 end
 
 function Timer:addPeriodic(delay, func, count)
-	local count = count or math.huge -- exploit below: math.huge - 1 = math.huge
+	local count, handle = count or math.huge -- exploit below: math.huge - 1 = math.huge
 
-	return self:add(delay, function(f)
+	handle = self:add(delay, function(f)
 		if func(func) == false then return end
 		count = count - 1
 		if count > 0 then
-			self:add(delay, f)
+			self.functions[handle] = delay
 		end
 	end)
+	return handle
 end
 
 function Timer:cancel(handle)