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MineClone2/mods/ENTITIES/mcl_burning/engine.lua

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local S = minetest.get_translator("mcl_burning")
function mcl_burning.get_default(datatype)
local default_table = {string = "", float = 0.0, int = 0, bool = false}
return default_table[datatype]
end
function mcl_burning.get(obj, datatype, name)
local key
if obj:is_player() then
local meta = obj:get_meta()
return meta["get_" .. datatype](meta, "mcl_burning:" .. name)
else
local luaentity = obj:get_luaentity()
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return luaentity and luaentity["mcl_burning_" .. name] or mcl_burning.get_default(datatype)
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end
end
function mcl_burning.set(obj, datatype, name, value)
if obj:is_player() then
local meta = obj:get_meta()
meta["set_" .. datatype](meta, "mcl_burning:" .. name, value or mcl_burning.get_default(datatype))
else
local luaentity = obj:get_luaentity()
if mcl_burning.get_default(datatype) == value then
value = nil
end
luaentity["mcl_burning_" .. name] = value
end
end
function mcl_burning.is_burning(obj)
return mcl_burning.get(obj, "float", "burn_time") > 0
end
function mcl_burning.is_affected_by_rain(obj)
return mcl_weather.get_weather() == "rain" and mcl_weather.is_outdoor(obj:get_pos())
end
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function mcl_burning.get_collisionbox(obj, smaller)
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local box = obj:get_properties().collisionbox
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local minp, maxp = vector.new(box[1], box[2], box[3]), vector.new(box[4], box[5], box[6])
if smaller then
local s_vec = vector.new(0.1, 0.1, 0.1)
minp = vector.add(minp, s_vec)
maxp = vector.subtract(maxp, s_vec)
end
return minp, maxp
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end
function mcl_burning.get_touching_nodes(obj, nodenames)
local pos = obj:get_pos()
local box = obj:get_properties().collisionbox
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local minp, maxp = mcl_burning.get_collisionbox(obj, true)
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local nodes = minetest.find_nodes_in_area(vector.add(pos, minp), vector.add(pos, maxp), nodenames)
return nodes
end
function mcl_burning.get_highest_group_value(obj, groupname)
local nodes = mcl_burning.get_touching_nodes(obj, "group:" .. groupname, true)
local highest_group_value = 0
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for _, pos in pairs(nodes) do
local node = minetest.get_node(pos)
local group_value = minetest.get_item_group(node.name, groupname)
if group_value > highest_group_value then
highest_group_value = group_value
end
end
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return highest_group_value
end
function mcl_burning.damage(obj)
local luaentity = obj:get_luaentity()
local health
if luaentity then
health = luaentity.health
end
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local hp = health or obj:get_hp()
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if hp <= 0 then
return
end
local do_damage = true
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if obj:is_player() then
if mcl_potions.player_has_effect(obj, "fire_proof") then
do_damage = false
else
local name = obj:get_player_name()
armor.last_damage_types[name] = "fire"
local deathmsg = S("@1 burned to death.", name)
local reason = mcl_burning.get(obj, "string", "reason")
if reason ~= "" then
deathmsg = S("@1 was burned by @2.", name, reason)
end
mcl_death_messages.player_damage(obj, deathmsg)
end
else
if luaentity.fire_damage_resistant then
do_damage = false
end
end
if do_damage then
local damage = mcl_burning.get(obj, "float", "damage")
if damage == 0 then
damage = 1
end
local new_hp = hp - damage
if health then
luaentity.health = new_hp
else
obj:set_hp(new_hp)
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end
end
end
function mcl_burning.set_on_fire(obj, burn_time, damage, reason)
local luaentity = obj:get_luaentity()
if luaentity and luaentity.fire_resistant then
return
end
local old_burn_time = mcl_burning.get(obj, "float", "burn_time")
local max_fire_prot_lvl = 0
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if obj:is_player() then
if minetest.is_creative_enabled(obj:get_player_name()) then
burn_time = burn_time / 100
end
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local inv = obj:get_inventory()
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for i = 2, 5 do
local stack = inv:get_stack("armor", i)
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local fire_prot_lvl = mcl_enchanting.get_enchantment(stack, "fire_protection")
max_fire_prot_lvl = math.max(max_fire_prot_lvl, fire_prot_lvl)
end
end
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if max_fire_prot_lvl > 0 then
burn_time = burn_time - math.floor(burn_time * max_fire_prot_lvl * 0.15)
end
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if old_burn_time <= burn_time then
local sound_id = mcl_burning.get(obj, "int", "sound_id")
if sound_id == 0 then
sound_id = minetest.sound_play("fire_fire", {
object = obj,
gain = 0.18,
max_hear_distance = 16,
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loop = true,
}) + 1
end
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local hud_id
if obj:is_player() then
hud_id = mcl_burning.get(obj, "int", "hud_id")
if hud_id == 0 then
hud_id = obj:hud_add({
hud_elem_type = "image",
position = {x = 0.5, y = 0.5},
scale = {x = -100, y = -100},
text = "fire_basic_flame.png",
z_index = 1000,
}) + 1
end
end
mcl_burning.set(obj, "float", "burn_time", burn_time)
mcl_burning.set(obj, "float", "damage", damage)
mcl_burning.set(obj, "string", "reason", reason)
mcl_burning.set(obj, "int", "hud_id", hud_id)
mcl_burning.set(obj, "int", "sound_id", sound_id)
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local fire_entity = minetest.add_entity(obj:get_pos(), "mcl_burning:fire")
local minp, maxp = mcl_burning.get_collisionbox(obj)
local obj_size = obj:get_properties().visual_size
local vertical_grow_factor = 1.2
local horizontal_grow_factor = 1.1
local grow_vector = vector.new(horizontal_grow_factor, vertical_grow_factor, horizontal_grow_factor)
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local size = vector.subtract(maxp, minp)
size = vector.multiply(size, grow_vector)
size = vector.divide(size, obj_size)
local offset = vector.new(0, size.y * 10 / 2, 0)
fire_entity:set_properties({visual_size = size})
fire_entity:set_attach(obj, "", offset, {x = 0, y = 0, z = 0})
mcl_burning.update_animation_frame(obj, fire_entity, 0)
end
end
function mcl_burning.extinguish(obj)
if mcl_burning.is_burning(obj) then
local sound_id = mcl_burning.get(obj, "int", "sound_id") - 1
minetest.sound_stop(sound_id)
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if obj:is_player() then
local hud_id = mcl_burning.get(obj, "int", "hud_id") - 1
obj:hud_remove(hud_id)
end
mcl_burning.set(obj, "float", "damage")
mcl_burning.set(obj, "string", "reason")
mcl_burning.set(obj, "float", "burn_time")
mcl_burning.set(obj, "float", "damage_timer")
mcl_burning.set(obj, "int", "hud_id")
mcl_burning.set(obj, "int", "sound_id")
end
end
function mcl_burning.catch_fire_tick(obj, dtime)
if mcl_burning.is_affected_by_rain(obj) or #mcl_burning.get_touching_nodes(obj, "group:puts_out_fire") > 0 then
mcl_burning.extinguish(obj)
else
local set_on_fire_value = mcl_burning.get_highest_group_value(obj, "set_on_fire")
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if set_on_fire_value > 0 then
mcl_burning.set_on_fire(obj, set_on_fire_value)
end
end
end
function mcl_burning.tick(obj, dtime)
local burn_time = mcl_burning.get(obj, "float", "burn_time") - dtime
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if burn_time <= 0 then
mcl_burning.extinguish(obj)
else
mcl_burning.set(obj, "float", "burn_time", burn_time)
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local damage_timer = mcl_burning.get(obj, "float", "damage_timer") + dtime
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if damage_timer >= 1 then
damage_timer = 0
mcl_burning.damage(obj)
end
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mcl_burning.set(obj, "float", "damage_timer", damage_timer)
end
mcl_burning.catch_fire_tick(obj, dtime)
end
function mcl_burning.update_animation_frame(obj, fire_entity, animation_frame)
local fire_texture = "mcl_burning_entity_flame_animated.png^[opacity:180^[verticalframe:" .. mcl_burning.animation_frames .. ":" .. animation_frame
local fire_HUD_texture = "mcl_burning_hud_flame_animated.png^[opacity:180^[verticalframe:" .. mcl_burning.animation_frames .. ":" .. animation_frame
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fire_entity:set_properties({textures = {"blank.png", "blank.png", fire_texture, fire_texture, fire_texture, fire_texture}})
if obj:is_player() then
local hud_id = mcl_burning.get(obj, "int", "hud_id") - 1
obj:hud_change(hud_id, "text", fire_HUD_texture)
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end
end
function mcl_burning.fire_entity_step(self, dtime)
if self.removed then
return
end
local obj = self.object
local parent = obj:get_attach()
local do_remove
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self.doing_step = true
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if not parent or not mcl_burning.is_burning(parent) then
do_remove = true
else
for _, other in ipairs(minetest.get_objects_inside_radius(obj:get_pos(), 0)) do
local luaentity = obj:get_luaentity()
if luaentity and luaentity.name == "mcl_burning:fire" and not luaentity.doing_step and not luaentity.removed then
do_remove = true
break
end
end
end
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self.doing_step = false
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if do_remove then
self.removed = true
obj:remove()
return
end
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local animation_timer = self.animation_timer + dtime
if animation_timer >= 0.015 then
animation_timer = 0
local animation_frame = self.animation_frame + 1
if animation_frame > mcl_burning.animation_frames - 1 then
animation_frame = 0
end
mcl_burning.update_animation_frame(parent, obj, animation_frame)
self.animation_frame = animation_frame
end
self.animation_timer = animation_timer
end