Merge pull request #68 from billmakes/master

vec2: add meta functions for mathematical operators

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