Add flare gun.

abms.lua

@@ -313,6 +313,19 @@ end)
 -- destruction
 ------------------------------------------------------------
 
+minetest.register_abm({
+	nodenames = {"fun_caves:flare",},
+	interval = 5,
+	chance = 10,
+	action = function(pos, node)
+		if not (pos and node) then
+			return
+		end
+
+		minetest.remove_node(pos)
+	end,
+})
+
 minetest.register_abm({
 	nodenames = {"fun_caves:hot_cobble",},
 	neighbors = {"group:water"},

init.lua

@@ -187,7 +187,11 @@ dofile(fun_caves.path .. "/fungal_tree.lua")
 dofile(fun_caves.path .. "/wallhammer.lua")
 dofile(fun_caves.path .. "/mapgen.lua")
 dofile(fun_caves.path .. "/wooden_buckets.lua")
-dofile(fun_caves.path .. "/spec_bomb.lua")
+
+if minetest.get_modpath('tnt') then
+	dofile(fun_caves.path .. "/spec_bomb.lua")
+end
+
 dofile(fun_caves.path .. "/elixir.lua")  -- must go after all items are registered
 dofile(fun_caves.path .. "/chat.lua")
 

spec_bomb.lua

@@ -397,3 +397,102 @@ minetest.register_craft({
 		{'', 'default:steelblock', 'default:coalblock'},
 	}
 })
+
+
+local function flares(player)
+	local dir = player:get_look_dir()
+	local pos = player:getpos()
+	if not pos then
+		return
+	end
+	pos.x = pos.x + dir.x * 10
+	pos.y = pos.y + dir.y * 10
+	pos.z = pos.z + dir.z * 10
+	pos = vector.round(pos)
+
+	local air = minetest.get_content_id('air')
+	local flare = minetest.get_content_id('fun_caves:flare')
+	local vm = minetest.get_voxel_manip()
+	if not vm then
+		return
+	end
+
+	local r = 8
+	local minp = vector.subtract(pos, r)
+	local maxp = vector.add(pos, r)
+	local emin, emax = vm:read_from_map(minp, maxp)
+	local area = VoxelArea:new({MinEdge = emin, MaxEdge = emax})
+	local data = vm:get_data()
+	local count = 0
+	for i = 1, 50 do
+		local x = pos.x + math.random(2 * r + 1) - r - 1
+		local y = pos.y + math.random(2 * r + 1) - r - 1
+		local z = pos.z + math.random(2 * r + 1) - r - 1
+		local ivm = area:index(x, y, z)
+		if data[ivm] == air then
+			data[ivm] = flare
+			count = count + 1
+		end
+	end
+	vm:set_data(data)
+	vm:calc_lighting(minp, maxp)
+	vm:update_liquids()
+	vm:write_to_map()
+	vm:update_map()
+
+	return count
+end
+
+minetest.register_node("fun_caves:flare", {
+	description = "Fungal tree fruit",
+	drawtype = "plantlike",
+	visual_scale = 0.75,
+	tiles = {"fun_caves_flare.png"},
+	paramtype = "light",
+	sunlight_propagates = true,
+	light_source = 15,
+	walkable = false,
+	diggable = false,
+	pointable = false,
+	is_ground_content = false,
+})
+
+minetest.register_tool("fun_caves:flare_gun", {
+	description = "Flare Gun",
+	inventory_image = "fun_caves_flare_gun.png",
+	tool_capabilities = {
+		full_punch_interval = 1.2,
+		max_drop_level=0,
+		groupcaps={
+			snappy={times={[2]=1.6, [3]=0.40}, uses=10, maxlevel=1},
+		},
+		damage_groups = {fleshy=2},
+	},
+	on_use = function(itemstack, user, pointed_thing)
+		if not user then
+			return
+		end
+
+		local count = flares(user)
+		itemstack:add_wear(count * 400)
+		return itemstack
+	end,
+})
+
+minetest.register_craft({
+	output = 'fun_caves:flare_gun',
+	recipe = {
+		{'', '', ''},
+		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
+		{'', 'tnt:gunpowder', 'group:stick'},
+	}
+})
+
+minetest.register_craft({
+	output = 'fun_caves:flare_gun',
+	recipe = {
+		{'', '', ''},
+		{'', 'fun_caves:flare_gun', ''},
+		{'', 'tnt:gunpowder', ''},
+	}
+})

textures/image_credits.txt

@@ -13,3 +13,4 @@ The pyramid and translocator textures are copied from the default sandstone and
 Firework 2: William Crochot (cc-by-sa 4): https://en.wikipedia.org/wiki/File:Feu_d'artifice_-_333.jpg
 Apple pie: Dan Parsons (cc-by-sa 2): https://en.wikipedia.org/wiki/File:Apple_pie.jpg
 Onion: Colin (cc-by-sa 3): https://en.wikipedia.org/wiki/File:Red_Onion_on_White.JPG
+Flare Gun: Billlion (cc-by-sa 3): https://en.wikipedia.org/wiki/File:Molins_Number_1_signal_Pistol.jpg