finish serpentine tower event and quest

data/lib/core/position.lua

@@ -72,4 +72,28 @@ function Position:moveRel(x, y, z)
 	self.y = self.y + y
 	self.z = self.z + z
 	return self
+end
+
+function Position:isInRange(from, to)
+	-- No matter what corner from and to is, we want to make
+	-- life easier by calculating north-west and south-east
+	local zone = {
+		nW = {
+			x = (from.x < to.x and from.x or to.x),
+			y = (from.y < to.y and from.y or to.y),
+			z = (from.z < to.z and from.z or to.z)
+		},
+		sE = {
+			x = (to.x > from.x and to.x or from.x),
+			y = (to.y > from.y and to.y or from.y),
+			z = (to.z > from.z and to.z or from.z)
+		}
+	}
+
+	if  self.x >= zone.nW.x and self.x <= zone.sE.x
+	and self.y >= zone.nW.y and self.y <= zone.sE.y
+	and self.z >= zone.nW.z and self.z <= zone.sE.z then
+		return true
+	end
+	return false
 end