many worldgen mods and gonna try technic now

mods/dfcaverns/mine_gas/wisp.lua

@@ -0,0 +1,89 @@
+local modname = minetest.get_current_modname()
+local S = minetest.get_translator(modname)
+
+local wisp_desc
+local wisp_usage
+
+if minetest.get_modpath("doc") then
+	wisp_desc = S("Mysterious blue flames may occasionally be found flickering on the edges of oil lakes, burning without oxygen and seeming to maintain their size as they drift about through the unbreathable atmosphere.")
+	wisp_usage = S("Gas Wisps have no known use, and fortunately they are not hostile or very dangerous.")
+end
+
+minetest.register_node("mine_gas:gas_wisp", {
+	description = S("Gas Wisp"),
+	_doc_items_longdesc = wisp_desc,
+	_doc_items_usagehelp = wisp_usage,
+	walkable = false,
+	is_ground_content = false,
+	diggable = false,
+	buildable_to = true,
+	drawtype = "plantlike",
+	waving = 1,
+	drowning = 1,
+	damage_per_second = 4,
+	post_effect_color = {a = 20, r = 20, g = 20, b = 250},
+	tiles = {{name = "mine_gas_wisp.png", animation =
+		{
+			type = "vertical_frames",
+			aspect_w = 16,
+			aspect_h = 16,
+			length = 1.5,
+		},
+	}},
+	light_source = 10,
+	use_texture_alpha = "clip",
+	groups = {not_in_creative_inventory=0},
+	paramtype = "light",
+	paramtype2 = "meshoptions",
+	place_param2 = 0,
+	-- * bit 4 (0x10, decimal 16) - Makes the plant mesh 1.4x larger
+	inventory_image = "mine_gas_wisp_inventory.png",
+	drop = {},
+	sunlight_propagates = true,
+	on_blast = function() end, -- unaffected by explosions
+	_mcl_blast_resistance = 3600000,
+	_mcl_hardness = 0,
+})
+
+minetest.register_abm({
+    label = "mine_gas:gas wisp movement",
+    nodenames = {"mine_gas:gas_wisp"},
+    neighbors = {"mine_gas:gas"},
+    interval = 1.0,
+    chance = 10,
+    catch_up = true,
+    action = function(pos, node)
+		local next_pos = {x=pos.x+math.random(1,3)-2, y=pos.y+math.random(1,3)-2, z=pos.z+math.random(1,3)-2}
+		local next_node = minetest.get_node(next_pos)
+		if next_node.name == "mine_gas:gas" then
+			minetest.swap_node(next_pos, node)
+			minetest.swap_node(pos, next_node)
+		end
+		pos = next_pos
+
+	end,
+})
+
+minetest.register_abm({
+    label = "mine_gas:gas wisp extinguish",
+    nodenames = {"mine_gas:gas_wisp"},
+    neighbors = {"air"},
+    interval = 10,
+    chance = 1,
+    catch_up = true,
+    action = function(pos, node)
+		for y = -1, 1 do
+			for x = -1, 1 do
+				for z = -1, 1 do
+					local node_name = minetest.get_node({x=pos.x+x, y=pos.y+y, z=pos.z+z}).name
+					if node_name == "mine_gas:gas" or minetest.get_item_group(node_name, "flammable") > 0 then
+						-- there's gas or a flammable adjacent, don't extinguish
+						return
+					end
+				end
+			end
+		end
+		-- no gas adjacent, extinguish
+		minetest.set_node(pos, {name="air"})
+	end,
+})