state_machine: include prev_state_name

state_machine.lua

@@ -33,6 +33,7 @@ local state_machine = class({
 function state_machine:new(states, start_in_state)
 	self.states = states or {}
 	self.current_state_name = ""
+	self.prev_state_name = ""
 	self.reset_state_name = start_in_state or ""
 	self:reset()
 end
@@ -151,6 +152,7 @@ end
 function state_machine:set_state(name, reset)
 	if self.current_state_name ~= name or reset then
 		self:_call("exit")
+		self.prev_state_name = self.current_state_name
 		self.current_state_name = name
 		self:_call_and_transition("enter", self)
 	end

vec2.lua

@@ -453,6 +453,33 @@ function vec2:maxcomp()
 	return math.max(self.x, self.y)
 end
 
+-- meta functions for mathmatical operations
+function vec2.__add(a, b)
+	return a:vector_add_inplace(b)
+end
+
+function vec2.__sub(a, b)
+	return a:vector_sub_inplace(b)
+end
+
+function vec2.__mul(a, b)
+	if type(a) == "number" then
+		return b:scalar_mul_inplace(a)
+	elseif type(b) == "number" then
+		return a:scalar_mul_inplace(b)
+	else
+		return a:vector_mul_inplace(b)
+	end
+end
+
+function vec2.__div(a, b)
+	if type(b) == "number" then
+		return a:scalar_div_inplace(b)
+	else
+		return a:vector_div_inplace(b)
+	end
+end
+
 -- mask out min component, with preference to keep x
 function vec2:major_inplace()
 	if self.x > self.y then