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Add TNT API.
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red-001 authored and paramat committed Apr 16, 2016
1 parent 8556dd3 commit cfef21f
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Showing 2 changed files with 130 additions and 64 deletions.
36 changes: 36 additions & 0 deletions game_api.txt
Expand Up @@ -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
---------------

Expand Down
158 changes: 94 additions & 64 deletions mods/tnt/init.lua
@@ -1,4 +1,4 @@

tnt = {}
-- Default to enabled in singleplayer and disabled in multiplayer
local singleplayer = minetest.is_singleplayer()
local setting = minetest.setting_getbool("enable_tnt")
Expand Down Expand Up @@ -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
Expand Down Expand Up @@ -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()
Expand Down Expand Up @@ -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})
Expand All @@ -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())
Expand All @@ -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
Expand All @@ -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"},
Expand Down Expand Up @@ -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,
})

Expand Down Expand Up @@ -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,
Expand All @@ -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({
Expand All @@ -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,
})

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