Implement ABM system and damage effect

abms/puddle.lua

@@ -0,0 +1,86 @@
+-- code of this file is partially taken from and otherwise inspired by
+-- mymonths on https://github.com/minetest-mods/mymonths (licensed under DWYWPL)
+-- contributers available at https://github.com/minetest-mods/mymonths/graphs/contributors
+-- all changes of mine remain under LGPL v3
+
+local BLOCK_NAME = "regional_weather:puddle"
+local MIN_DISTANCE = 12
+
+if not regional_weather.settings.puddles then
+	minetest.register_alias(BLOCK_NAME, "air")
+	return
+end
+
+--Puddle node
+local node_box = {
+	type  = "fixed",
+	fixed = {
+		{-0.1875, -0.5, -0.375, 0.125, -0.4875, 0.3125},
+		{-0.25, -0.5, -0.3125, 0.3125, -0.4925, 0.25},
+		{-0.3125, -0.5, -0.1875, 0.375, -0.4975, 0.1875},
+	}
+}
+
+minetest.register_node(BLOCK_NAME, {
+	tiles = { "weather_puddle.png" },
+	drawtype = "nodebox",
+	pointable = false,
+	buildable_to = true,
+	floodable = true,
+	walkable = false,
+	sunlight_propagates = true,
+	paramtype = "light",
+	alpha = 50,
+	node_box = node_box,
+	groups = {
+		not_in_creative_inventory = 1,
+		crumbly = 3,
+		attached_node = 1,
+		slippery = 1,
+		replaceable_by_snow = 1
+	},
+	drop = "",
+})
+
+-- Makes Puddles when raining
+climate_api.register_abm({
+	label			= "create rain puddles",
+	nodenames	= { "group:soil", "group:stone" },
+	neighbors	= { "air" },
+	interval	= 10,
+	chance		= 50,
+
+	 conditions	= {
+		 min_height		= regional_weather.settings.min_height,
+		 max_height		= regional_weather.settings.max_height,
+		 min_humidity	= 55,
+		 min_heat			= 30,
+		 min_light		= 15
+	 },
+
+	 pos_override = function(pos)
+		 return vector.add(pos, { x = 0, y = 1, z = 0 })
+	 end,
+
+   action = function (pos, node, env)
+		 if minetest.get_node(pos).name ~= "air" then return end
+		 if minetest.find_node_near(pos, MIN_DISTANCE, BLOCK_NAME) then return end
+		 minetest.set_node(pos, {name = BLOCK_NAME})
+	 end
+})
+
+-- Makes puddles dry up when not raining
+climate_api.register_abm({
+	label = "remove rain puddles",
+	nodenames	= { BLOCK_NAME },
+	interval	= 5,
+	chance		= 5,
+
+	action = function (pos, node, env)
+		if env.humidity < 55 then
+			minetest.remove_node(pos)
+		elseif env.heat < 30 and regional_weather.settings.snow_cover then
+			minetest.set_node(pos, {name = "regional_weather:snow_cover_1"})
+    end
+	end
+})