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local S = minetest.get_translator ( " mcl_bows " )
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-- Time in seconds after which a stuck arrow is deleted
local ARROW_TIMEOUT = 60
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-- 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
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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
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local mod_awards = minetest.get_modpath ( " awards " ) and minetest.get_modpath ( " mcl_achievements " )
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local mod_button = minetest.get_modpath ( " mesecons_button " )
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minetest.register_craftitem ( " mcl_bows:arrow " , {
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description = S ( " Arrow " ) ,
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_tt_help = S ( " Ammunition " ) .. " \n " .. S ( " Damage from bow: 1-10 " ) .. " \n " .. S ( " Damage from dispenser: 3 " ) ,
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_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 20% 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. " ) ,
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inventory_image = " mcl_bows_arrow_inv.png " ,
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groups = { ammo = 1 , ammo_bow = 1 , ammo_bow_regular = 1 } ,
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_on_dispense = function ( itemstack , dispenserpos , droppos , dropnode , dropdir )
-- Shoot arrow
local shootpos = vector.add ( dispenserpos , vector.multiply ( dropdir , 0.51 ) )
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local yaw = math.atan2 ( dropdir.z , dropdir.x ) + YAW_OFFSET
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mcl_bows.shoot_arrow ( itemstack : get_name ( ) , shootpos , dropdir , yaw , nil , 19 , 3 )
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end ,
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} )
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local ARROW_ENTITY = {
physical = true ,
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visual = " mesh " ,
mesh = " mcl_bows_arrow.obj " ,
visual_size = { x = 1 , y = 1 } ,
textures = { " mcl_bows_arrow.png " } ,
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collisionbox = { - 0.19 , - 0.125 , - 0.19 , 0.19 , 0.125 , 0.19 } ,
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collide_with_objects = false ,
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_fire_damage_resistant = true ,
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_lastpos = { } ,
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_startpos = nil ,
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_damage = 1 , -- Damage on impact
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_is_critical = false , -- Whether this arrow would deal critical damage
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_stuck = false , -- Whether arrow is stuck
_stucktimer = nil , -- Amount of time (in seconds) the arrow has been stuck so far
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_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.
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_shooter = nil , -- ObjectRef of player or mob who shot it
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_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
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}
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-- Destroy arrow entity self at pos and drops it as an item
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local spawn_item = function ( self , pos )
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if not minetest.is_creative_enabled ( " " ) then
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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
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mcl_burning.extinguish ( self.object )
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self.object : remove ( )
end
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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
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ARROW_ENTITY.on_step = function ( self , dtime )
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mcl_burning.tick ( self.object , dtime )
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local pos = self.object : get_pos ( )
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local dpos = table.copy ( pos ) -- digital pos
dpos = vector.round ( dpos )
local node = minetest.get_node ( dpos )
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if self._stuck then
self._stucktimer = self._stucktimer + dtime
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self._stuckrechecktimer = self._stuckrechecktimer + dtime
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if self._stucktimer > ARROW_TIMEOUT then
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mcl_burning.extinguish ( self.object )
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self.object : remove ( )
return
end
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-- Drop arrow as item when it is no longer stuck
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-- FIXME: Arrows are a bit slow to react and continue to float in mid air for a few seconds.
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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
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-- Pickup arrow if player is nearby (not in Creative Mode)
local objects = minetest.get_objects_inside_radius ( pos , 1 )
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for _ , obj in ipairs ( objects ) do
if obj : is_player ( ) then
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if self._collectable and not minetest.is_creative_enabled ( obj : get_player_name ( ) ) then
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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 ,
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} , true )
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end
end
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mcl_burning.extinguish ( self.object )
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self.object : remove ( )
return
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end
end
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-- Check for object "collision". Done every tick (hopefully this is not too stressing)
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else
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if self._damage == 10 or self._damage == 9 then
minetest.add_particlespawner ( {
amount = 1 ,
time = .001 ,
minpos = pos ,
maxpos = pos ,
minvel = vector.new ( - 0.1 , - 0.1 , - 0.1 ) ,
maxvel = vector.new ( 0.1 , 0.1 , 0.1 ) ,
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minexptime = 0.5 ,
maxexptime = 0.5 ,
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minsize = 2 ,
maxsize = 2 ,
collisiondetection = false ,
vertical = false ,
texture = " mobs_mc_arrow_particle.png " ,
glow = 1 ,
} )
end
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-- 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).
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local objs = minetest.get_objects_inside_radius ( pos , 1.5 )
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local closest_object
local closest_distance
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if self._deflection_cooloff > 0 then
self._deflection_cooloff = self._deflection_cooloff - dtime
end
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-- Iterate through all objects and remember the closest attackable object
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for k , obj in pairs ( objs ) do
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local ok = false
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-- Arrows can only damage players and mobs
if obj ~= self._shooter and obj : is_player ( ) then
ok = true
elseif obj : get_luaentity ( ) ~= nil then
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if obj ~= self._shooter and ( obj : get_luaentity ( ) . _cmi_is_mob or obj : get_luaentity ( ) . _hittable_by_projectile ) then
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ok = true
end
end
if ok then
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local dist = vector.distance ( pos , obj : get_pos ( ) )
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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
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local is_player = obj : is_player ( )
local lua = obj : get_luaentity ( )
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if obj ~= self._shooter and ( is_player or ( lua and ( lua._cmi_is_mob or lua._hittable_by_projectile ) ) ) then
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if obj : get_hp ( ) > 0 then
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-- 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
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mcl_burning.extinguish ( self.object )
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self.object : remove ( )
return
end
end
end
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-- Punch target object but avoid hurting enderman.
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if not lua or lua.name ~= " mobs_mc:enderman " then
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if obj : is_player ( ) and rawget ( _G , " armor " ) and armor.last_damage_types then
armor.last_damage_types [ obj : get_player_name ( ) ] = " projectile "
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end
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damage_particles ( self.object : get_pos ( ) , self._is_critical )
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if mcl_burning.is_burning ( self.object ) then
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mcl_burning.set_on_fire ( obj , 5 )
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end
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obj : punch ( self.object , 1.0 , {
full_punch_interval = 1.0 ,
damage_groups = { fleshy = self._damage } ,
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} , self.object : get_velocity ( ) )
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end
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if is_player then
if self._shooter and self._shooter : is_player ( ) then
-- “Ding” sound for hitting another player
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minetest.sound_play ( { name = " mcl_bows_hit_player " , gain = 0.1 } , { to_player = self._shooter : get_player_name ( ) } , true )
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end
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end
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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
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end
end
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minetest.sound_play ( { name = " mcl_bows_hit_other " , gain = 0.3 } , { pos = self.object : get_pos ( ) , max_hear_distance = 16 } , true )
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end
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mcl_burning.extinguish ( self.object )
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self.object : remove ( )
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return
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end
end
end
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-- Check for node collision
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if self._lastpos . x ~= nil and not self._stuck then
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local def = minetest.registered_nodes [ node.name ]
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local vel = self.object : get_velocity ( )
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-- 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. :-(
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if ( math.abs ( vel.x ) < 0.0001 ) or ( math.abs ( vel.z ) < 0.0001 ) or ( math.abs ( vel.y ) < 0.00001 ) then
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-- Check for the node to which the arrow is pointing
local dir
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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
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else
dir = minetest.facedir_to_dir ( minetest.dir_to_facedir ( minetest.yaw_to_dir ( self.object : get_yaw ( ) - YAW_OFFSET ) ) )
end
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self._stuckin = vector.add ( dpos , dir )
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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
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if self._deflection_cooloff <= 0 then
-- Lose 1/3 of velocity on deflection
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local newvel = vector.multiply ( vel , 0.6667 )
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self.object : set_velocity ( newvel )
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-- Reset deflection cooloff timer to prevent many deflections happening in quick succession
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self._deflection_cooloff = 1.0
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end
else
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-- Node was walkable, make arrow stuck
self._stuck = true
self._stucktimer = 0
self._stuckrechecktimer = 0
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self.object : set_velocity ( { x = 0 , y = 0 , z = 0 } )
self.object : set_acceleration ( { x = 0 , y = 0 , z = 0 } )
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minetest.sound_play ( { name = " mcl_bows_hit_other " , gain = 0.3 } , { pos = self.object : get_pos ( ) , max_hear_distance = 16 } , true )
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if mcl_burning.is_burning ( self.object ) and snode.name == " mcl_tnt:tnt " then
tnt.ignite ( self._stuckin )
end
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-- 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
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end
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end
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elseif ( def and def.liquidtype ~= " none " ) then
-- Slow down arrow in liquids
local v = def.liquid_viscosity
if not v then
v = 0
end
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local old_v = self._viscosity
self._viscosity = v
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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 )
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end
end
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-- Update yaw
if not self._stuck then
local vel = self.object : get_velocity ( )
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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 } )
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end
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-- Update internal variable
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self._lastpos = { x = pos.x , y = pos.y , z = pos.z }
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end
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-- 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
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ARROW_ENTITY.get_staticdata = function ( self )
local out = {
lastpos = self._lastpos ,
startpos = self._startpos ,
damage = self._damage ,
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is_critical = self._is_critical ,
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stuck = self._stuck ,
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stuckin = self._stuckin ,
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}
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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
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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 )
if data then
self._stuck = data.stuck
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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
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mcl_burning.extinguish ( self.object )
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self.object : remove ( )
return
end
end
-- Perform a stuck recheck on the next step.
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self._stuckrechecktimer = STUCK_RECHECK_TIME
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self._stuckin = data.stuckin
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end
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-- Get the remaining arrow state
self._lastpos = data.lastpos
self._startpos = data.startpos
self._damage = data.damage
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self._is_critical = data.is_critical
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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
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self.object : set_armor_groups ( { immortal = 1 } )
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end
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minetest.register_entity ( " mcl_bows:arrow_entity " , ARROW_ENTITY )
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if minetest.get_modpath ( " mcl_core " ) and minetest.get_modpath ( " mcl_mobitems " ) then
minetest.register_craft ( {
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output = ' mcl_bows:arrow 4 ' ,
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recipe = {
{ ' mcl_core:flint ' } ,
{ ' mcl_core:stick ' } ,
{ ' mcl_mobitems:feather ' }
}
} )
end
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if minetest.get_modpath ( " doc_identifier " ) ~= nil then
doc.sub . identifier.register_object ( " mcl_bows:arrow_entity " , " craftitems " , " mcl_bows:arrow " )
end