more fish spawning heights (#73)

init.lua

@@ -202,6 +202,10 @@ if minetest.get_modpath("mobs_animal") then
 	end
 end
 
+if minetest.get_modpath("mobs_fish") then
+	dofile(MP .. "/mobs_fish.lua")
+end
+
 -- digistuff:channelcopier fix
 if minetest.get_modpath("digistuff") then
 	dofile(MP .. "/digi_copier_fixer.lua")

mobs_fish.lua

@@ -0,0 +1,72 @@
+-- Add extra areas where fish spawn
+
+local l_spawn_chance = 10000
+local l_water_level = minetest.settings:get("water_level")
+local l_max_height_Earth = 777 -- Vacuum sometimes extends well below 1k
+local l_max_height_Mars = 15777
+local l_min_height_Mars = 11111
+
+-- Extend Earth
+mobs:spawn({
+	name = "mobs_fish:clownfish",
+	nodes = {
+		"default:water_source", "default:water_flowing",
+		"default:river_water_source", "default:river_water_flowing"
+	},
+	neighbors =  {"default:sand","default:dirt","group:seaplants","group:seacoral"},
+	min_light = 5,
+	interval = 30,
+	chance = l_spawn_chance,
+	max_height = l_max_height_Earth,
+	min_height = l_water_level,
+	active_object_count = 5
+})
+
+
+mobs:spawn({
+	name = "mobs_fish:tropical",
+	nodes = {
+		"default:water_source", "default:water_flowing",
+		"default:river_water_source", "default:river_water_flowing"
+	},
+	neighbors =  {"default:sand","default:dirt","group:seaplants","group:seacoral"},
+	min_light = 5,
+	interval = 30,
+	chance = l_spawn_chance,
+	max_height = l_max_height_Earth,
+	min_height = l_water_level,
+	active_object_count = 5
+})
+
+
+-- Extend Mars
+mobs:spawn({
+	name = "mobs_fish:clownfish",
+	nodes = {
+		"default:water_source", "default:water_flowing",
+		"default:river_water_source", "default:river_water_flowing"
+	},
+	neighbors =  {"default:sand","default:dirt","group:seaplants","group:seacoral"},
+	min_light = 5,
+	interval = 30,
+	chance = l_spawn_chance,
+	max_height = l_max_height_Mars,
+	min_height = l_min_height_Mars,
+	active_object_count = 5
+})
+
+
+mobs:spawn({
+	name = "mobs_fish:tropical",
+	nodes = {
+		"default:water_source", "default:water_flowing",
+		"default:river_water_source", "default:river_water_flowing"
+	},
+	neighbors =  {"default:sand","default:dirt","group:seaplants","group:seacoral"},
+	min_light = 5,
+	interval = 30,
+	chance = l_spawn_chance,
+	max_height = l_max_height_Mars,
+	min_height = l_min_height_Mars,
+	active_object_count = 5
+})

mod.conf

@@ -35,6 +35,7 @@ missions,
 mobs,
 mobs_animal,
 mobs_monster,
+mobs_fish,
 moreblocks,
 multitools,
 mypaths,