if minetest.global_exists("hw_utils") then
	local np_temp = {
		offset = 50,
		scale = 50,
		spread = {x = 500, y = 500, z = 500},
		seed = 5349,
		octaves = 3,
		persist = 0.5,
		lacunarity = 2.0
	}

	local np_humid = {
		offset = 50,
		scale = 50,
		spread = {x = 500, y = 500, z = 500},
		seed = 842,
		octaves = 3,
		persist = 0.5,
		lacunarity = 2.0
	}

	local is_biome_frozen = function(position)
		local posx = math.floor(position.x)
		local posz = math.floor(position.z)
		local noise_obj = minetest.get_perlin(np_temp)
		local noise_temp = noise_obj:get2d({x = posx, y = posz})

		-- below 35 heat biome considered to be frozen type
		return noise_temp < 35
	end

	hw_utils.is_biome_frozen = function(position)
		return is_biome_frozen(position)
	end

	local is_biome_dry = function(position)
		local posx = math.floor(position.x)
		local posz = math.floor(position.z)
		local noise_obj = minetest.get_perlin(np_humid)
		local noise_humid = noise_obj:get2d({x = posx, y = posz})

		-- below 50 humid biome considered to be dry type (at least by this mod)
		return noise_humid < 50
	end

	hw_utils.is_biome_dry = function(position)
		return is_biome_dry(position)
	end

	local is_biome_tropic = function(position)
		local posx = math.floor(position.x)
		local posz = math.floor(position.z)
		local noise_obj = minetest.get_perlin(np_humid)
		local noise_humid = noise_obj:get2d({x = posx, y = posz})
		noise_obj = minetest.get_perlin(np_temp)
		local noise_temp = noise_obj:get2d({x = posx, y = posz})

		-- humid and temp values are taked by testing flying around world (not sure actually)
		return noise_humid > 55 and noise_temp > 80
	end

	hw_utils.is_biome_tropic = function(position)
		return is_biome_tropic(position)
	end

end

minetest.log("action", "[nalc_weather] loaded.")