VoxeLibre/mods/CORE/mcl_damage/init.lua
2021-04-25 20:51:13 +02:00

164 lines
4.7 KiB
Lua

mcl_damage = {
modifiers = {},
damage_callbacks = {},
death_callbacks = {},
types = {
in_fire = {is_fire = true},
lightning_bolt = {is_lightning = true},
on_fire = {is_fire = true, bypasses_armor = true},
lava = {is_fire = true},
hot_floor = {is_fire = true},
in_wall = {bypasses_armor = true},
drown = {bypasses_armor = true},
starve = {bypasses_armor = true, bypasses_magic = true},
cactus = {},
fall = {bypasses_armor = true},
fly_into_wall = {bypasses_armor = true}, -- unused
out_of_world = {bypasses_armor = true, bypasses_magic = true, bypasses_invulnerability = true},
generic = {bypasses_armor = true},
magic = {is_magic = true, bypasses_armor = true},
dragon_breath = {is_magic = true, bypasses_armor = true}, -- this is only used for dragon fireball; dragon fireball does not actually deal impact damage tho, so this is unreachable
wither = {bypasses_armor = true}, -- unused
wither_skull = {is_magic = true, is_explosion = true}, -- this is non-MC but a workaround to get the proper death message
anvil = {},
falling_node = {}, -- this is falling_block in MC
mob = {},
player = {},
arrow = {is_projectile = true},
fireball = {is_projectile = true, is_fire = true},
thorns = {is_magic = true},
explosion = {is_explosion = true},
cramming = {bypasses_armor = true}, -- unused
fireworks = {is_explosion = true}, -- unused
}
}
function mcl_damage.register_modifier(func, priority)
table.insert(mcl_damage.modifiers, {func = func, priority = priority or 0})
end
function mcl_damage.register_on_damage(func)
table.insert(mcl_damage.damage_callbacks, func)
end
function mcl_damage.register_on_death(func)
table.insert(mcl_damage.death_callbacks, func)
end
function mcl_damage.run_modifiers(obj, damage, reason)
for _, modf in ipairs(mcl_damage.modifiers) do
damage = modf.func(obj, damage, reason) or damage
if damage == 0 then
return 0
end
end
return damage
end
local function run_callbacks(funcs, ...)
for _, func in pairs(funcs) do
func(...)
end
end
function mcl_damage.run_damage_callbacks(obj, damage, reason)
run_callbacks(mcl_damage.damage_callbacks, obj, damage, reason)
end
function mcl_damage.run_death_callbacks(obj, reason)
run_callbacks(mcl_damage.death_callbacks, obj, reason)
end
function mcl_damage.from_punch(mcl_reason, object)
mcl_reason.direct = object
local luaentity = mcl_reason.direct:get_luaentity()
if luaentity then
if luaentity._is_arrow then
mcl_reason.type = "arrow"
elseif luaentity._is_fireball then
mcl_reason.type = "fireball"
elseif luaentity._cmi_is_mob then
mcl_reason.type = "mob"
end
mcl_reason.source = mcl_reason.source or luaentity._source_object
else
mcl_reason.type = "player"
end
end
function mcl_damage.finish_reason(mcl_reason)
mcl_reason.source = mcl_reason.source or mcl_reason.direct
mcl_reason.flags = mcl_damage.types[mcl_reason.type]
end
function mcl_damage.from_mt(mt_reason)
if mt_reason._mcl_chached_reason then
return mt_reason._mcl_chached_reason
end
local mcl_reason
if mt_reason._mcl_reason then
mcl_reason = mt_reason._mcl_reason
else
mcl_reason = {type = "generic"}
if mt_reason._mcl_type then
mcl_reason.type = mt_reason._mcl_type
elseif mt_reason.type == "fall" then
mcl_reason.type = "fall"
elseif mt_reason.type == "drown" then
mcl_reason.type = "drown"
elseif mt_reason.type == "punch" then
mcl_damage.from_punch(mcl_reason, mt_reason.object)
elseif mt_reason.type == "node_damage" and mt_reason.node then
if minetest.get_item_group(mt_reason.node, "fire") > 0 then
mcl_reason.type = "in_fire"
end
if minetest.get_item_group(mt_reason.node, "lava") > 0 then
mcl_reason.type = "lava"
end
end
for key, value in pairs(mt_reason) do
if key:find("_mcl_") == 1 then
mcl_reason[key:sub(6, #key)] = value
end
end
end
mcl_damage.finish_reason(mcl_reason)
mt_reason._mcl_cached_reason = mcl_reason
return mcl_reason
end
function mcl_damage.register_type(name, def)
mcl_damage.types[name] = def
end
minetest.register_on_player_hpchange(function(player, hp_change, mt_reason)
if hp_change < 0 then
if player:get_hp() <= 0 then
return 0
end
hp_change = -mcl_damage.run_modifiers(player, -hp_change, mcl_damage.from_mt(mt_reason))
end
return hp_change
end, true)
minetest.register_on_player_hpchange(function(player, hp_change, mt_reason)
if hp_change < 0 then
mcl_damage.run_damage_callbacks(player, -hp_change, mcl_damage.from_mt(mt_reason))
end
end, false)
minetest.register_on_dieplayer(function(player, mt_reason)
mcl_damage.run_death_callbacks(player, mcl_damage.from_mt(mt_reason))
end)
minetest.register_on_mods_loaded(function()
table.sort(mcl_damage.modifiers, function(a, b) return a.priority < b.priority end)
end)