Merge pull request 'Lava produce sparks' (#292) from MrRar/MineClone5:lava into master

Reviewed-on: MineClone5/MineClone5#292

mods/ITEMS/mcl_core/README.txt

@@ -21,6 +21,14 @@ MIT License.
 The textures are taken from the Minecraft resource pack “Faithful 1.11” by Vattic and
 xMrVizzy and contributers.
 
+
+CC BY-SA 4.0
+
+mcl_core_lava_spark.png is based on the Pixel Perfection resource pack for Minecraft 1.11,
+authored by XSSheep.
+Source: <https://www.planetminecraft.com/texture_pack/131pixel-perfection/>
+License: [CC BY-SA 4.0](http://creativecommons.org/licenses/by-sa/4.0/)
+
 Sounds
 ======
 All sounds included in this mod are under the MIT License.

mods/ITEMS/mcl_core/functions.lua

@@ -54,6 +54,137 @@ minetest.register_abm({
 	end,
 })
 
+
+--
+-- Production of sparks from lava
+--
+
+local LAVA_SPARK_ABM_INTERVAL = 5
+local lava_spark_limit = minetest.settings:get("mcl_core_lava_spark_limit")
+if lava_spark_limit == nil then
+	lava_spark_limit = 10
+else
+	lava_spark_limit = tonumber(lava_spark_limit)
+end
+local lava_spark_chance = 0
+local lava_spark_abm_census = 0
+local lava_spark_census = 0
+
+function mcl_core.lava_spark_set_chance()
+	lava_spark_chance = lava_spark_limit / lava_spark_abm_census
+	minetest.after(LAVA_SPARK_ABM_INTERVAL, mcl_core.lava_spark_set_chance)
+	lava_spark_abm_census = 0
+	lava_spark_census = 0
+end
+
+if lava_spark_limit > 0 then
+	mcl_core.lava_spark_set_chance()
+
+	minetest.register_abm({
+		label = "Lava produce sparks",
+		nodenames = {"group:lava"},
+		neighbors = {"air"},
+		interval = LAVA_SPARK_ABM_INTERVAL,
+		chance = 18,
+		action = function(pos, node)
+			local above = minetest.get_node(vector.new(pos.x, pos.y + 1, pos.z))
+			if above.name ~= "air" then return end
+		
+			lava_spark_abm_census = lava_spark_abm_census + 1
+		
+			if lava_spark_census >= lava_spark_limit then return end
+			if math.random() > lava_spark_chance then return end
+		
+			lava_spark_census = lava_spark_census + 1
+			minetest.after(math.random() * LAVA_SPARK_ABM_INTERVAL, mcl_core.lava_spark_add, pos)
+		end
+	})
+end
+
+function mcl_core.lava_spark_add(pos)
+	local node = minetest.get_node(pos)
+	if minetest.get_node_group(node.name, "lava") == 0 then return end
+	
+	local above = minetest.get_node(vector.new(pos.x, pos.y + 1, pos.z))
+	if above.name ~= "air" then return end
+	
+	local pos_addend = vector.new(
+		(math.random() - 0.5) * 0.8,
+		(math.random() - 0.5) * 0.8,
+		(math.random() - 0.5) * 0.8
+	)
+	local spark_pos = vector.add(pos, pos_addend)
+	local spark = minetest.add_entity(spark_pos, "mcl_core:lava_spark")
+	if not spark then return end
+	
+	local velocity = vector.new(
+		(math.random() - 0.5) * 3,
+		(math.random() + 2) * 2,
+		(math.random() - 0.5) * 3
+	)
+	spark:set_velocity(velocity)
+	
+	spark:set_acceleration(vector.new(0, -9, 0))
+	
+	-- Set a random size
+	local size = 0.2 + math.random() * 0.2
+	local props = spark:get_properties()
+	if not props then return end
+	props.visual_size = vector.new(size, size, size)
+	spark:set_properties(props)
+	
+	local luaentity = spark:get_luaentity()
+	if not luaentity then return end
+	luaentity._life_timer = 0.4 + math.random()
+end
+
+minetest.register_entity("mcl_core:lava_spark", {
+	physical = true,
+	visual = "sprite",
+	collide_with_objects = true,
+	textures = {"mcl_core_lava_spark.png"},
+	glow = 10,
+	static_save = false,
+	_smoke_timer = 0.1,
+	_life_timer = 1,
+	on_step = function(self, dtime)
+		if not self or not self.object then return end
+
+		self._life_timer = self._life_timer - dtime
+		if self._life_timer <= 0 then
+			self.object:remove()
+			return
+		end
+
+
+		self._smoke_timer = self._smoke_timer - dtime
+		if self._smoke_timer > 0 then return end
+		self._smoke_timer = 0.2 + math.random() * 0.3
+		
+		local pos = self.object:get_pos()
+
+		-- Add smoke
+		minetest.add_particlespawner({
+			amount = 3,
+			time = 0.001,
+			minpos = pos,
+			maxpos = pos,
+			minvel = vector.new(-0.1, 1, -0.1),
+			maxvel = vector.new(0.1, 1.5, 0.1),
+			minexptime = 0.1,
+			maxexptime = 0.6,
+			minsize = 0.5,
+			maxsize = 1.5,
+			texture = "mcl_particles_smoke_anim.png",
+			animation = {
+				type = "vertical_frames",
+				aspect_w = 8,
+				aspect_h = 8,
+			}
+		})
+	end
+})
+
 --
 -- Papyrus and cactus growing
 --

settingtypes.txt

@@ -51,6 +51,10 @@ mcl_showDeathMessages (Show death messages) bool true
 # If disabled, all recipes will be shown.
 mcl_craftguide_progressive_mode	(Learn crafting recipes progressively) bool true
 
+# Limit the number of sparks produced by lava per 5 seconds to this number.
+# 0 will disable lava sparks altogeter with no ABM being registered.
+mcl_core_lava_spark_limit (Number of sparks lava can produce per 5 seconds) int 10
+
 [Mobs]
 # If enabled, mobs will spawn naturally. This does not affect
 # affect mob spawners.