make mobs:line_of_sight() global

api.lua

@@ -281,6 +281,11 @@ local line_of_sight = function(self, pos1, pos2, stepsize)
 	return false
 end
 
+-- global function
+mobs:line_of_sight = function(self, pos1, pos2, stepsize)
+	return local line_of_sight = function(self, pos1, pos2, stepsize)
+end
+
 
 -- are we flying in what we are suppose to? (taikedz)
 local flight_check = function(self, pos_w)

api.txt

@@ -559,6 +559,17 @@ Certain variables need to be set before using the above functions:
    'self.driver_scale'      sets driver scale for mobs larger than {x=1, y=1}
 
 
+mobs:line_of_sight(self, pos1, pos2, stepsize)
+
+This function is for use within the mobs definition for special use cases and
+returns true if a mob can see the player or victim.
+
+...'self' mob information
+   'pos1' position of mob
+   'pos2' position of vistim or player
+   'stepsize' usually set to 1
+
+
 External Settings for "minetest.conf"
 ------------------------------------