spawn in groups

mods/ENTITIES/mcl_mobs/api.lua

@@ -4036,6 +4036,7 @@ minetest.register_entity(name, {
 	fire_resistant = def.fire_resistant or false,
 	fire_damage_resistant = def.fire_damage_resistant or false,
 	ignited_by_sunlight = def.ignited_by_sunlight or false,
+	spawn_in_group = def.spawn_in_group,
 	-- End of MCL2 extensions
 
 	on_spawn = def.on_spawn,

mods/ENTITIES/mcl_mobs/spawning.lua

@@ -386,6 +386,13 @@ local function get_water_spawn(p)
 		end
 end
 
+local function spawn_group(p,mob,spawn_on,group_max)
+	local nn = minetest.find_nodes_in_area(vector.offset(p,-3,-3,-3),vector.offset(p,3,3,3),spawn_on)
+	for i = 1, math.random(group_max) do
+		minetest.add_entity(nn[math.random(#nn)],mob)
+	end
+end
+
 if mobs_spawn then
 
 	local perlin_noise
@@ -449,6 +456,7 @@ if mobs_spawn then
 			end
 			local mob_def = mob_library_worker_table[mob_index]
 			local mob_type = minetest.registered_entities[mob_def.name].type
+			local spawn_in_group = minetest.registered_entities[mob_def.name].spawn_in_group
 			if mob_def
 				and spawning_position.y >= mob_def.min_height
 				and spawning_position.y <= mob_def.max_height
@@ -470,6 +478,9 @@ if mobs_spawn then
 					end
 					--everything is correct, spawn mob
 					local object = minetest.add_entity(spawning_position, mob_def.name)
+					if spawn_in_group then
+						spawn_group(spawning_position,mob_def.name,{gotten_node},spawn_in_group)
+					end
 					if object then
 						return mob_def.on_spawn and mob_def.on_spawn(object, spawning_position)
 					end

mods/ENTITIES/mobs_mc/cod.lua

@@ -40,6 +40,7 @@ local cod = {
 	xp_max = 3,
 	armor = 100,
 	rotate = 180,
+	spawn_in_group = 10,
 	tilt_swim = true,
 	collisionbox = {-0.3, 0.0, -0.3, 0.3, 0.79, 0.3},
 	visual = "mesh",

mods/ENTITIES/mobs_mc/dolphin.lua

@@ -42,6 +42,7 @@ local dolphin = {
 	walk_chance = 100,
 	breath_max = 120,
 	rotate = 180,
+	spawn_in_group = 3,
 	tilt_swim = true,
 	collisionbox = {-0.3, 0.0, -0.3, 0.3, 0.79, 0.3},
 	visual = "mesh",

mods/ENTITIES/mobs_mc/salmon.lua

@@ -19,6 +19,7 @@ local salmon = {
 	xp_min = 1,
 	xp_max = 3,
 	armor = 100,
+	spawn_in_group = 5,
 	tilt_swim = true,
 	collisionbox = {-0.4, 0.0, -0.4, 0.4, 0.79, 0.4},
 	visual = "mesh",