Add TNT API.

game_api.txt

@@ -209,6 +209,42 @@ Fire API
  * Called when fire attempts to remove a burning node.
  * `pos` Position of the burning node.
 
+
+#TNT API
+----------
+
+tnt.register_tnt(definition)
+
+^ Register a new type of tnt.
+
+ * `name` The name of the node. If no prefix is given `tnt` is used.
+ * `description` A description for your TNT.
+ * `radius` The radius within which the TNT can destroy nodes. The default is 3.
+ * `damage_radius` The radius within which the TNT can damage players and mobs. By default it is twice the `radius`.
+ * `disable_drops` Disable drops. By default it is set to false.
+ * `ignore_protection` Don't check `minetest.is_protected` before removing a node.
+ * `ignore_on_blast` Don't call `on_blast` even if a node has one.
+ * `tiles` Textures for node
+  * `side`  Side tiles. By default the name of the tnt with a suffix of `_side.png`.
+  * `top`  Top tile. By default the name of the tnt with a suffix of `_top.png`.
+  * `bottom` Bottom tile. By default the name of the tnt with a suffix of `_bottom.png`.
+  * `burning` Top tile when lit. By default the name of the tnt with a suffix of `_top_burning_animated.png".
+
+`tnt.boom(position, radius, damage_radius, disable_drops) `
+
+^ Create an explosion.
+
+* `position` The center of explosion.
+* `radius` The radius within which nodes can be destroyed.
+* `damage_radius` The distance from the center that players and mobs can get damaged in.
+* `disable_drops` Disable drops.
+* `ignore_protection` Don't check `minetest.is_protected` before removing a node.
+* `ignore_on_blast` Don't call `on_blast` even if a node has one.
+
+`tnt.burn(pos)`
+
+^ Ignite TNT at position
+
 Screwdriver API
 ---------------
 

mods/tnt/init.lua

-
+tnt = {}
 -- Default to enabled in singleplayer and disabled in multiplayer
 local singleplayer = minetest.is_singleplayer()
 local setting = minetest.setting_getbool("enable_tnt")
@@ -84,12 +84,12 @@ end
 
 local fire_node = {name="fire:basic_flame"}
 
-local function destroy(drops, pos, cid)
-	if minetest.is_protected(pos, "") then
+local function destroy(drops, pos, cid, ignore_protection, ignore_on_blast)
+	if not ignore_protection and minetest.is_protected(pos, "") then
 		return
 	end
 	local def = cid_data[cid]
-	if def and def.on_blast then
+	if not ignore_on_blast and def and def.on_blast then
 		local node_drops = def.on_blast(vector.new(pos), 1)
 		if node_drops then
 			for _, item in ipairs(node_drops) do
@@ -128,8 +128,6 @@ local function calc_velocity(pos1, pos2, old_vel, power)
 end
 
 local function entity_physics(pos, radius)
-	-- Make the damage radius larger than the destruction radius
-	radius = radius * 2
 	local objs = minetest.get_objects_inside_radius(pos, radius)
 	for _, obj in pairs(objs) do
 		local obj_pos = obj:getpos()
@@ -195,11 +193,12 @@ local function add_effects(pos, radius)
 	})
 end
 
-local function burn(pos)
+function tnt.burn(pos)
 	local name = minetest.get_node(pos).name
-	if name == "tnt:tnt" then
+	local group = minetest.get_item_group(name, "tnt")
+	if group > 0 then
 		minetest.sound_play("tnt_ignite", {pos=pos})
-		minetest.set_node(pos, {name="tnt:tnt_burning"})
+		minetest.set_node(pos, {name=name.."_burning"})
 		minetest.get_node_timer(pos):start(1)
 	elseif name == "tnt:gunpowder" then
 		minetest.sound_play("tnt_gunpowder_burning", {pos=pos, gain=2})
@@ -208,7 +207,7 @@ local function burn(pos)
 	end
 end
 
-local function explode(pos, radius)
+local function tnt_explode(pos, radius, ignore_protection, ignore_on_blast)
 	local pos = vector.round(pos)
 	local vm = VoxelManip()
 	local pr = PseudoRandom(os.time())
@@ -234,7 +233,7 @@ local function explode(pos, radius)
 			p.y = pos.y + y
 			p.z = pos.z + z
 			if cid ~= c_air then
-				destroy(drops, p, cid)
+				destroy(drops, p, cid, ignore_protection, ignore_on_blast)
 			end
 		end
 		vi = vi + 1
@@ -245,59 +244,19 @@ local function explode(pos, radius)
 	return drops
 end
 
-
-local function boom(pos)
+function tnt.boom(pos, def)
 	minetest.sound_play("tnt_explode", {pos=pos, gain=1.5, max_hear_distance=2*64})
 	minetest.set_node(pos, {name="tnt:boom"})
 	minetest.get_node_timer(pos):start(0.5)
-
-	local drops = explode(pos, radius)
-	entity_physics(pos, radius)
-	eject_drops(drops, pos, radius)
-	add_effects(pos, radius)
+	local drops = tnt_explode(pos, def.radius, def.ignore_protection,
+			def.ignore_on_blast)
+	entity_physics(pos, def.damage_radius)
+	if not def.disable_drops then
+		eject_drops(drops, pos, def.radius)
+	end
+	add_effects(pos, def.radius)
 end
 
-minetest.register_node("tnt:tnt", {
-	description = "TNT",
-	tiles = {"tnt_top.png", "tnt_bottom.png", "tnt_side.png"},
-	is_ground_content = false,
-	groups = {dig_immediate=2, mesecon=2},
-	sounds = default.node_sound_wood_defaults(),
-	on_punch = function(pos, node, puncher)
-		if puncher:get_wielded_item():get_name() == "default:torch" then
-			minetest.sound_play("tnt_ignite", {pos=pos})
-			minetest.set_node(pos, {name="tnt:tnt_burning"})
-		end
-	end,
-	on_blast = function(pos, intensity)
-		burn(pos)
-	end,
-	mesecons = {effector = {action_on = boom}},
-})
-
-minetest.register_node("tnt:tnt_burning", {
-	tiles = {
-		{
-			name = "tnt_top_burning_animated.png",
-			animation = {
-				type = "vertical_frames",
-				aspect_w = 16,
-				aspect_h = 16,
-				length = 1,
-			}
-		},
-		"tnt_bottom.png", "tnt_side.png"},
-	light_source = 5,
-	drop = "",
-	sounds = default.node_sound_wood_defaults(),
-	on_construct = function(pos)
-		minetest.get_node_timer(pos):start(4)
-	end,
-	on_timer = boom,
-	-- unaffected by explosions
-	on_blast = function() end,
-})
-
 minetest.register_node("tnt:boom", {
 	drawtype = "plantlike",
 	tiles = {"tnt_boom.png"},
@@ -331,11 +290,11 @@ minetest.register_node("tnt:gunpowder", {
 	
 	on_punch = function(pos, node, puncher)
 		if puncher:get_wielded_item():get_name() == "default:torch" then
-			burn(pos)
+			tnt.burn(pos)
 		end
 	end,
 	on_blast = function(pos, intensity)
-		burn(pos)
+		tnt.burn(pos)
 	end,
 })
 
@@ -393,7 +352,7 @@ minetest.register_node("tnt:gunpowder_burning", {
 		for dz = -1, 1 do
 		for dy = -1, 1 do
 			if not (dx == 0 and dz == 0) then
-				burn({
+				tnt.burn({
 					x = pos.x + dx,
 					y = pos.y + dy,
 					z = pos.z + dz,
@@ -409,11 +368,11 @@ minetest.register_node("tnt:gunpowder_burning", {
 })
 
 minetest.register_abm({
-	nodenames = {"tnt:tnt", "tnt:gunpowder"},
+	nodenames = {"group:tnt", "tnt:gunpowder"},
 	neighbors = {"fire:basic_flame", "default:lava_source", "default:lava_flowing"},
 	interval = 4,
 	chance = 1,
-	action = burn,
+	action = tnt.burn,
 })
 
 minetest.register_craft({
@@ -430,3 +389,74 @@ minetest.register_craft({
 		{"",           "group:wood",    ""}
 	}
 })
+
+function tnt.register_tnt(def)
+	local name = ""
+	if not def.name:find(':') then
+		name = "tnt:"..def.name
+	else
+		name = def.name
+		def.name = def.name:match(":([%w_]+)")
+	end
+	if not def.tiles then def.tiles = {} end
+	local tnt_top = def.tiles.top or def.name.."_top.png"
+	local tnt_bottom = def.tiles.bottom or def.name.."_bottom.png"
+	local tnt_side = def.tiles.side or def.name.."_side.png"
+	local tnt_burning = def.tiles.burning or def.name.."_top_burning_animated.png"
+	if not def.damage_radius then def.damage_radius = def.radius * 2 end
+	
+	minetest.register_node(":"..name, {
+		description = def.description,
+		tiles = {tnt_top, tnt_bottom, tnt_side},
+		is_ground_content = false,
+		groups = {dig_immediate=2, mesecon=2, tnt=1},
+		sounds = default.node_sound_wood_defaults(),
+		on_punch = function(pos, node, puncher)
+			if puncher:get_wielded_item():get_name() == "default:torch" then
+				minetest.sound_play("tnt_ignite", {pos=pos})
+				minetest.set_node(pos, {name=name.."_burning"})
+				minetest.get_node_timer(pos):start(4)
+			end
+		end,
+		on_blast = function(pos, intensity)
+			tnt.burn(pos)
+		end,
+		mesecons = {effector = 
+			{action_on = 
+				function(pos)
+					tnt.boom(pos, def)
+				end
+			}
+		},
+	})
+	
+	minetest.register_node(":"..name.."_burning", {
+		tiles = {
+			{
+				name = tnt_burning,
+				animation = {
+					type = "vertical_frames",
+					aspect_w = 16,
+					aspect_h = 16,
+					length = 1,
+				}
+			},
+			tnt_bottom, tnt_side
+			},
+		light_source = 5,
+		drop = "",
+		sounds = default.node_sound_wood_defaults(),
+		on_timer = function(pos, elapsed)
+			tnt.boom(pos, def)
+		end,
+		-- unaffected by explosions
+		on_blast = function() end,
+	})
+end
+
+tnt.register_tnt({
+	name = "tnt:tnt",
+	description = "TNT",
+	radius = radius,
+})
+