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Mineclonia/mods/ITEMS/mcl_bows/arrow.lua

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Lua
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local S = minetest.get_translator("mcl_bows")
-- Time in seconds after which a stuck arrow is deleted
local ARROW_TIMEOUT = 60
-- Time after which stuck arrow is rechecked for being stuck
local STUCK_RECHECK_TIME = 5
local GRAVITY = 9.81
local YAW_OFFSET = -math.pi/2
local dir_to_pitch = function(dir)
local dir2 = vector.normalize(dir)
local xz = math.abs(dir.x) + math.abs(dir.z)
return -math.atan2(-dir.y, xz)
end
local mod_awards = minetest.get_modpath("awards") and minetest.get_modpath("mcl_achievements")
local mod_button = minetest.get_modpath("mesecons_button")
minetest.register_craftitem("mcl_bows:arrow", {
description = S("Arrow"),
_tt_help = S("Ammunition").."\n"..S("Damage from bow: 1-10").."\n"..S("Damage from dispenser: 3"),
_doc_items_longdesc = S("Arrows are ammunition for bows and dispensers.").."\n"..
S("An arrow fired from a bow has a regular damage of 1-9. At full charge, there's a 25% chance of a critical hit dealing 10 damage instead. An arrow fired from a dispenser always deals 3 damage.").."\n"..
S("Arrows might get stuck on solid blocks and can be retrieved again. They are also capable of pushing wooden buttons."),
_doc_items_usagehelp = S("To use arrows as ammunition for a bow, just put them anywhere in your inventory, they will be used up automatically. To use arrows as ammunition for a dispenser, place them in the dispenser's inventory. To retrieve an arrow that sticks in a block, simply walk close to it."),
inventory_image = "mcl_bows_arrow_inv.png",
groups = { ammo=1, ammo_bow=1, ammo_bow_regular=1 },
_on_dispense = function(itemstack, dispenserpos, droppos, dropnode, dropdir)
-- Shoot arrow
local shootpos = vector.add(dispenserpos, vector.multiply(dropdir, 0.51))
local yaw = math.atan2(dropdir.z, dropdir.x) + YAW_OFFSET
mcl_bows.shoot_arrow(itemstack:get_name(), shootpos, dropdir, yaw, nil, 19, 3)
end,
})
-- This is a fake node, used as model for the arrow entity.
-- It's not supposed to be usable as item or real node.
-- TODO: Use a proper mesh for the arrow entity
minetest.register_node("mcl_bows:arrow_box", {
drawtype = "nodebox",
is_ground_content = false,
node_box = {
type = "fixed",
fixed = {
-- Shaft
{-6.5/17, -1.5/17, -1.5/17, -4.5/17, 1.5/17, 1.5/17},
{-4.5/17, -0.5/17, -0.5/17, 5.5/17, 0.5/17, 0.5/17},
{5.5/17, -1.5/17, -1.5/17, 6.5/17, 1.5/17, 1.5/17},
-- Tip
{-4.5/17, 2.5/17, 2.5/17, -3.5/17, -2.5/17, -2.5/17},
{-8.5/17, 0.5/17, 0.5/17, -6.5/17, -0.5/17, -0.5/17},
-- Fletching
{6.5/17, 1.5/17, 1.5/17, 7.5/17, 2.5/17, 2.5/17},
{7.5/17, -2.5/17, 2.5/17, 6.5/17, -1.5/17, 1.5/17},
{7.5/17, 2.5/17, -2.5/17, 6.5/17, 1.5/17, -1.5/17},
{6.5/17, -1.5/17, -1.5/17, 7.5/17, -2.5/17, -2.5/17},
{7.5/17, 2.5/17, 2.5/17, 8.5/17, 3.5/17, 3.5/17},
{8.5/17, -3.5/17, 3.5/17, 7.5/17, -2.5/17, 2.5/17},
{8.5/17, 3.5/17, -3.5/17, 7.5/17, 2.5/17, -2.5/17},
{7.5/17, -2.5/17, -2.5/17, 8.5/17, -3.5/17, -3.5/17},
}
},
tiles = {"mcl_bows_arrow.png^[transformFX", "mcl_bows_arrow.png^[transformFX", "mcl_bows_arrow_back.png", "mcl_bows_arrow_front.png", "mcl_bows_arrow.png", "mcl_bows_arrow.png^[transformFX"},
use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "opaque" or false,
paramtype = "light",
paramtype2 = "facedir",
sunlight_propagates = true,
groups = {not_in_creative_inventory=1, dig_immediate=3},
drop = "",
node_placement_prediction = "",
on_construct = function(pos)
minetest.log("error", "[mcl_bows] Trying to construct mcl_bows:arrow_box at "..minetest.pos_to_string(pos))
minetest.remove_node(pos)
end,
})
local ARROW_ENTITY={
physical = true,
visual = "wielditem",
visual_size = {x=0.4, y=0.4},
textures = {"mcl_bows:arrow_box"},
collisionbox = {-0.19, -0.125, -0.19, 0.19, 0.125, 0.19},
collide_with_objects = false,
_fire_damage_resistant = true,
_lastpos={},
_startpos=nil,
_damage=1, -- Damage on impact
_is_critical=false, -- Whether this arrow would deal critical damage
_stuck=false, -- Whether arrow is stuck
_stucktimer=nil,-- Amount of time (in seconds) the arrow has been stuck so far
_stuckrechecktimer=nil,-- An additional timer for periodically re-checking the stuck status of an arrow
_stuckin=nil, --Position of node in which arow is stuck.
_shooter=nil, -- ObjectRef of player or mob who shot it
_viscosity=0, -- Viscosity of node the arrow is currently in
_deflection_cooloff=0, -- Cooloff timer after an arrow deflection, to prevent many deflections in quick succession
}
-- Destroy arrow entity self at pos and drops it as an item
local spawn_item = function(self, pos)
if not minetest.is_creative_enabled("") then
local item = minetest.add_item(pos, "mcl_bows:arrow")
item:set_velocity({x=0, y=0, z=0})
item:set_yaw(self.object:get_yaw())
end
mcl_burning.extinguish(self.object)
self.object:remove()
end
local damage_particles = function(pos, is_critical)
if is_critical then
minetest.add_particlespawner({
amount = 15,
time = 0.1,
minpos = {x=pos.x-0.5, y=pos.y-0.5, z=pos.z-0.5},
maxpos = {x=pos.x+0.5, y=pos.y+0.5, z=pos.z+0.5},
minvel = {x=-0.1, y=-0.1, z=-0.1},
maxvel = {x=0.1, y=0.1, z=0.1},
minacc = {x=0, y=0, z=0},
maxacc = {x=0, y=0, z=0},
minexptime = 1,
maxexptime = 2,
minsize = 1.5,
maxsize = 1.5,
collisiondetection = false,
vertical = false,
texture = "mcl_particles_crit.png^[colorize:#bc7a57:127",
})
end
end
ARROW_ENTITY.on_step = function(self, dtime)
mcl_burning.tick(self.object, dtime)
self._time_in_air = self._time_in_air + .001
local pos = self.object:get_pos()
local dpos = table.copy(pos) -- digital pos
dpos = vector.round(dpos)
local node = minetest.get_node(dpos)
if self._stuck then
self._stucktimer = self._stucktimer + dtime
self._stuckrechecktimer = self._stuckrechecktimer + dtime
if self._stucktimer > ARROW_TIMEOUT then
mcl_burning.extinguish(self.object)
self.object:remove()
return
end
-- Drop arrow as item when it is no longer stuck
-- FIXME: Arrows are a bit slow to react and continue to float in mid air for a few seconds.
if self._stuckrechecktimer > STUCK_RECHECK_TIME then
local stuckin_def
if self._stuckin then
stuckin_def = minetest.registered_nodes[minetest.get_node(self._stuckin).name]
end
-- TODO: In MC, arrow just falls down without turning into an item
if stuckin_def and stuckin_def.walkable == false then
spawn_item(self, pos)
return
end
self._stuckrechecktimer = 0
end
-- Pickup arrow if player is nearby (not in Creative Mode)
local objects = minetest.get_objects_inside_radius(pos, 1)
for _,obj in ipairs(objects) do
if obj:is_player() then
if self._collectable and not minetest.is_creative_enabled(obj:get_player_name()) then
if obj:get_inventory():room_for_item("main", "mcl_bows:arrow") then
obj:get_inventory():add_item("main", "mcl_bows:arrow")
minetest.sound_play("item_drop_pickup", {
pos = pos,
max_hear_distance = 16,
gain = 1.0,
}, true)
end
end
mcl_burning.extinguish(self.object)
self.object:remove()
return
end
end
-- Check for object "collision". Done every tick (hopefully this is not too stressing)
else
-- We just check for any hurtable objects nearby.
-- The radius of 3 is fairly liberal, but anything lower than than will cause
-- arrow to hilariously go through mobs often.
-- TODO: Implement an ACTUAL collision detection (engine support needed).
local objs = minetest.get_objects_inside_radius(pos, 1.5)
local closest_object
local closest_distance
if self._deflection_cooloff > 0 then
self._deflection_cooloff = self._deflection_cooloff - dtime
end
-- Iterate through all objects and remember the closest attackable object
for k, obj in pairs(objs) do
local ok = false
-- Arrows can only damage players and mobs
if obj:is_player() then
ok = true
elseif obj:get_luaentity() ~= nil then
if obj:get_luaentity()._cmi_is_mob or obj:get_luaentity()._hittable_by_projectile then
ok = true
end
end
if ok then
local dist = vector.distance(pos, obj:get_pos())
if not closest_object or not closest_distance then
closest_object = obj
closest_distance = dist
elseif dist < closest_distance then
closest_object = obj
closest_distance = dist
end
end
end
-- If an attackable object was found, we will damage the closest one only
if closest_object ~= nil then
local obj = closest_object
local is_player = obj:is_player()
local lua = obj:get_luaentity()
if obj == self._shooter and self._time_in_air > 1.02 or obj ~= self._shooter and (is_player or (lua and (lua._cmi_is_mob or lua._hittable_by_projectile))) then
if obj:get_hp() > 0 then
-- Check if there is no solid node between arrow and object
local ray = minetest.raycast(self.object:get_pos(), obj:get_pos(), true)
for pointed_thing in ray do
if pointed_thing.type == "object" and pointed_thing.ref == closest_object then
-- Target reached! We can proceed now.
break
elseif pointed_thing.type == "node" then
local nn = minetest.get_node(minetest.get_pointed_thing_position(pointed_thing)).name
local def = minetest.registered_nodes[nn]
if (not def) or def.walkable then
-- There's a node in the way. Delete arrow without damage
mcl_burning.extinguish(self.object)
self.object:remove()
return
end
end
end
-- Punch target object but avoid hurting enderman.
if not lua or lua.name ~= "mobs_mc:enderman" then
if obj:is_player() and rawget(_G, "armor") and armor.last_damage_types then
armor.last_damage_types[obj:get_player_name()] = "projectile"
end
damage_particles(self.object:get_pos(), self._is_critical)
if mcl_burning.is_burning(self.object) then
mcl_burning.set_on_fire(obj, 5)
end
obj:punch(self.object, 1.0, {
full_punch_interval=1.0,
damage_groups={fleshy=self._damage},
}, self.object:get_velocity())
end
if is_player then
if self._shooter and self._shooter:is_player() and obj ~= self._shooter then
-- “Ding” sound for hitting another player
minetest.sound_play({name="mcl_bows_hit_player", gain=0.1}, {to_player=self._shooter:get_player_name()}, true)
end
end
if lua then
local entity_name = lua.name
-- Achievement for hitting skeleton, wither skeleton or stray (TODO) with an arrow at least 50 meters away
-- NOTE: Range has been reduced because mobs unload much earlier than that ... >_>
-- TODO: This achievement should be given for the kill, not just a hit
if self._shooter and self._shooter:is_player() and vector.distance(pos, self._startpos) >= 20 then
if mod_awards and (entity_name == "mobs_mc:skeleton" or entity_name == "mobs_mc:stray" or entity_name == "mobs_mc:witherskeleton") then
awards.unlock(self._shooter:get_player_name(), "mcl:snipeSkeleton")
end
end
end
minetest.sound_play({name="mcl_bows_hit_other", gain=0.3}, {pos=self.object:get_pos(), max_hear_distance=16}, true)
end
mcl_burning.extinguish(self.object)
self.object:remove()
return
end
end
end
-- Check for node collision
if self._lastpos.x~=nil and not self._stuck then
local def = minetest.registered_nodes[node.name]
local vel = self.object:get_velocity()
-- Arrow has stopped in one axis, so it probably hit something.
-- This detection is a bit clunky, but sadly, MT does not offer a direct collision detection for us. :-(
if (math.abs(vel.x) < 0.0001) or (math.abs(vel.z) < 0.0001) or (math.abs(vel.y) < 0.00001) then
-- Check for the node to which the arrow is pointing
local dir
if math.abs(vel.y) < 0.00001 then
if self._lastpos.y < pos.y then
dir = {x=0, y=1, z=0}
else
dir = {x=0, y=-1, z=0}
end
else
dir = minetest.facedir_to_dir(minetest.dir_to_facedir(minetest.yaw_to_dir(self.object:get_yaw()-YAW_OFFSET)))
end
self._stuckin = vector.add(dpos, dir)
local snode = minetest.get_node(self._stuckin)
local sdef = minetest.registered_nodes[snode.name]
-- If node is non-walkable, unknown or ignore, don't make arrow stuck.
-- This causes a deflection in the engine.
if not sdef or sdef.walkable == false or snode.name == "ignore" then
self._stuckin = nil
if self._deflection_cooloff <= 0 then
-- Lose 1/3 of velocity on deflection
local newvel = vector.multiply(vel, 0.6667)
self.object:set_velocity(newvel)
-- Reset deflection cooloff timer to prevent many deflections happening in quick succession
self._deflection_cooloff = 1.0
end
else
-- Node was walkable, make arrow stuck
self._stuck = true
self._stucktimer = 0
self._stuckrechecktimer = 0
self.object:set_velocity({x=0, y=0, z=0})
self.object:set_acceleration({x=0, y=0, z=0})
minetest.sound_play({name="mcl_bows_hit_other", gain=0.3}, {pos=self.object:get_pos(), max_hear_distance=16}, true)
if mcl_burning.is_burning(self.object) and snode.name == "mcl_tnt:tnt" then
tnt.ignite(self._stuckin)
end
-- Push the button! Push, push, push the button!
if mod_button and minetest.get_item_group(node.name, "button") > 0 and minetest.get_item_group(node.name, "button_push_by_arrow") == 1 then
local bdir = minetest.wallmounted_to_dir(node.param2)
-- Check the button orientation
if vector.equals(vector.add(dpos, bdir), self._stuckin) then
mesecon.push_button(dpos, node)
end
end
end
elseif (def and def.liquidtype ~= "none") then
-- Slow down arrow in liquids
local v = def.liquid_viscosity
if not v then
v = 0
end
local old_v = self._viscosity
self._viscosity = v
local vpenalty = math.max(0.1, 0.98 - 0.1 * v)
if math.abs(vel.x) > 0.001 then
vel.x = vel.x * vpenalty
end
if math.abs(vel.z) > 0.001 then
vel.z = vel.z * vpenalty
end
self.object:set_velocity(vel)
end
end
-- Update yaw
if not self._stuck then
local vel = self.object:get_velocity()
local yaw = minetest.dir_to_yaw(vel)+YAW_OFFSET
local pitch = dir_to_pitch(vel)
self.object:set_rotation({ x = 0, y = yaw, z = pitch })
end
-- Update internal variable
self._lastpos={x=pos.x, y=pos.y, z=pos.z}
end
-- Force recheck of stuck arrows when punched.
-- Otherwise, punching has no effect.
ARROW_ENTITY.on_punch = function(self)
if self._stuck then
self._stuckrechecktimer = STUCK_RECHECK_TIME
end
end
ARROW_ENTITY.get_staticdata = function(self)
local out = {
lastpos = self._lastpos,
startpos = self._startpos,
damage = self._damage,
is_critical = self._is_critical,
stuck = self._stuck,
stuckin = self._stuckin,
}
if self._stuck then
-- If _stucktimer is missing for some reason, assume the maximum
if not self._stucktimer then
self._stucktimer = ARROW_TIMEOUT
end
out.stuckstarttime = minetest.get_gametime() - self._stucktimer
end
if self._shooter and self._shooter:is_player() then
out.shootername = self._shooter:get_player_name()
end
return minetest.serialize(out)
end
ARROW_ENTITY.on_activate = function(self, staticdata, dtime_s)
local data = minetest.deserialize(staticdata)
self._time_in_air = 1.0
if data then
self._stuck = data.stuck
if data.stuck then
if data.stuckstarttime then
-- First, check if the stuck arrow is aleady past its life timer.
-- If yes, delete it.
self._stucktimer = minetest.get_gametime() - data.stuckstarttime
if self._stucktimer > ARROW_TIMEOUT then
mcl_burning.extinguish(self.object)
self.object:remove()
return
end
end
-- Perform a stuck recheck on the next step.
self._stuckrechecktimer = STUCK_RECHECK_TIME
self._stuckin = data.stuckin
end
-- Get the remaining arrow state
self._lastpos = data.lastpos
self._startpos = data.startpos
self._damage = data.damage
self._is_critical = data.is_critical
if data.shootername then
local shooter = minetest.get_player_by_name(data.shootername)
if shooter and shooter:is_player() then
self._shooter = shooter
end
end
end
self.object:set_armor_groups({ immortal = 1 })
end
minetest.register_entity("mcl_bows:arrow_entity", ARROW_ENTITY)
if minetest.get_modpath("mcl_core") and minetest.get_modpath("mcl_mobitems") then
minetest.register_craft({
output = 'mcl_bows:arrow 4',
recipe = {
{'mcl_core:flint'},
{'mcl_core:stick'},
{'mcl_mobitems:feather'}
}
})
end
if minetest.get_modpath("doc_identifier") ~= nil then
doc.sub.identifier.register_object("mcl_bows:arrow_entity", "craftitems", "mcl_bows:arrow")
end
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