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MineClone2/mods/ITEMS/mcl_armor/damage.lua

100 lines
3.0 KiB
Lua

function mcl_armor.damage_modifier(obj, hp_change, reason)
if hp_change > 0 then
return hp_change
end
local damage = -hp_change
local flags = reason.flags
if flags.bypasses_armor and flags.bypasses_magic then
return hp_change
end
local uses = math.max(1, math.floor(damage / 4))
local points = 0
local toughness = 0
local enchantment_protection_factor = 0
local thorns_damage_regular = 0
local thorns_damage_irregular = 0
local thorns_pieces = {}
local inv = mcl_util.get_inventory(obj)
if inv then
for name, element in pairs(mcl_armor.elements) do
local itemstack = inv:get_stack("armor", element.index)
if not itemstack:is_empty() then
local itemname = itemstack:get_name()
local enchantments = mcl_enchanting.get_enchantments(itemstack)
if not flags.bypasses_armor then
points = points + minetest.get_item_group(itemname, "mcl_armor_points")
toughness = toughness + minetest.get_item_group(itemname, "mcl_armor_toughness")
mcl_util.use_item_durability(itemstack, uses)
inv:set_stack("armor", element.index, itemstack)
end
if not flags.bypasses_magic then
local function add_enchantments(tbl)
if tbl then
for _, enchantment in pairs(tbl) do
local level = enchantments[enchantment.id]
if level and level > 0 then
enchantment_protection_factor = enchantment_protection_factor + level * enchantment.factor
end
end
end
end
add_enchantments(mcl_armor.protection_enchantments.wildcard)
add_enchantments(mcl_armor.protection_enchantments.types[reason.type])
for flag, value in pairs(flags) do
if value then
add_enchantments(mcl_armor.protection_enchantments.flags[flag])
end
end
end
if reason.source and enchantments.thorns > 0 then
local do_irregular_damage = enchantments.thorns > 10
if do_irregular_damage or thorns_damage_regular < 4 and math.random() < enchantments.thorns * 0.15 then
if do_irregular_damage then
thorns_damage_irregular = thorns_damage_irregular + throrns_level - 10
else
thorns_damage_regular = math.min(4, thorns_damage_regular + math.random(4))
end
end
table.insert(thorns_pieces, {index = element.index, itemstack = itemstack})
end
end
end
end
-- https://minecraft.gamepedia.com/Armor#Damage_protection
damage = damage * (1 - math.min(20, math.max((points / 5), points - damage / (2 + (toughness / 4)))) / 25)
-- https://minecraft.gamepedia.com/Armor#Enchantments
damage = damage * (1 - math.min(20, enchantment_protection_factor) / 25)
local thorns_damage = thorns_damage_regular + thorns_damage_irregular
if thorns_damage > 0 and reason.source ~= obj then
mcl_util.deal_damage(reason.source, {type = "thorns", direct = obj, source = reason.source})
local thorns_item = thorns_pieces[math.random(#thorns_pieces)]
mcl_util.use_item_durability(thorns_item.itemstack, 2)
inv:set_stack("armor", thorns_item.index, thorns_item.itemstack)
end
mcl_armor.update(obj)
return -math.floor(damage + 0.5)
end