Display large player dot on maps for nearby player

mods/ITEMS/mcl_maps/init.lua

@@ -324,18 +324,36 @@ minetest.register_globalstep(function(dtime)
 			local marker
 
 			if pos.x < minp.x then
-				marker = "mcl_maps_player_dot.png"
+				if minp.x - pos.x < 256 then
+					marker = "mcl_maps_player_dot_large.png"
+				else
+					marker = "mcl_maps_player_dot.png"
+				end
 				pos.x = minp.x
 			elseif pos.x > maxp.x then
-				marker = "mcl_maps_player_dot.png"
+				if pos.x - maxp.x < 256 then
+					marker = "mcl_maps_player_dot_large.png"
+				else
+					marker = "mcl_maps_player_dot.png"
+				end
 				pos.x = maxp.x
 			end
 
+			-- we never override the small marker
+			-- yes, this is a literal corner case
 			if pos.z < minp.z then
-				marker = "mcl_maps_player_dot.png"
+				if minp.z - pos.z < 256 and marker ~= "mcl_maps_player_dot.png" then
+					marker = "mcl_maps_player_dot_large.png"
+				else
+					marker = "mcl_maps_player_dot.png"
+				end
 				pos.z = minp.z
 			elseif pos.z > maxp.z then
-				marker = "mcl_maps_player_dot.png"
+				if pos.z - maxp.z < 256 and marker ~= "mcl_maps_player_dot.png" then
+					marker = "mcl_maps_player_dot_large.png"
+				else
+					marker = "mcl_maps_player_dot.png"
+				end
 				pos.z = maxp.z
 			end