MineClone5/mods/ITEMS/mcl_potions/tipped_arrow.lua

451 lines
16 KiB
Lua

local S = minetest.get_translator("mcl_potions")
-- 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 function arrow_image(colorstring, opacity)
if not opacity then
opacity = 127
end
return {"mcl_bows_arrow.png^[transformFX^(mcl_bows_arrow_overlay.png^[transformFX^[colorize:"..colorstring..":"..tostring(opacity)..")",
"mcl_bows_arrow.png^[transformFX^(mcl_bows_arrow_overlay.png^[transformFX^[colorize:"..colorstring..":"..tostring(opacity)..")",
"mcl_bows_arrow_back.png^[colorize:"..colorstring..":"..tostring(opacity),
"mcl_bows_arrow_front.png^[colorize:"..colorstring..":"..tostring(opacity),
"mcl_bows_arrow.png^(mcl_bows_arrow_overlay.png^[colorize:"..colorstring..":"..tostring(opacity)..")",
"mcl_bows_arrow.png^[transformFX^(mcl_bows_arrow_overlay.png^[transformFX^[colorize:"..colorstring..":"..tostring(opacity)..")"}
end
local how_to_shoot = minetest.registered_items["mcl_bows:arrow"]._doc_items_usagehelp
local mod_awards = minetest.get_modpath("awards") and minetest.get_modpath("mcl_achievements")
local mod_button = minetest.get_modpath("mesecons_button")
function mcl_potions.register_arrow(name, desc, color, def)
local longdesc = def.longdesc or ""
minetest.register_craftitem("mcl_potions:"..name.."_arrow", {
description = desc,
_tt_help = S("Ammunition").."\n"..S("Damage from bow: 1-10").."\n"..S("Damage from dispenser: 3").."\n"..def.tt,
_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.").."\n"..
S("This particular arrow is tipped and will give an effect when it hits a player or mob.").."\n"..
longdesc,
_doc_items_usagehelp = how_to_shoot,
inventory_image = "mcl_bows_arrow_inv.png^(mcl_potions_arrow_inv.png^[colorize:"..color..":100)",
groups = { ammo=1, ammo_bow=1, brewitem=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_potions:"..name.."_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 = arrow_image(color, 100),
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_potions] Trying to construct mcl_potions:"..name.."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_potions:"..name.."_arrow_box"},
collisionbox = {-0.19, -0.125, -0.19, 0.19, 0.125, 0.19},
collide_with_objects = false,
_lastpos={},
_startpos=nil,
_damage=1, -- Damage on impact
_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_potions:"..name.."_arrow")
item:set_velocity({x=0, y=0, z=0})
item:set_yaw(self.object:get_yaw())
end
self.object:remove()
end
ARROW_ENTITY.on_step = function(self, dtime)
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
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 not minetest.is_creative_enabled(obj:get_player_name()) then
if obj:get_inventory():room_for_item("main", "mcl_potions:"..name.."_arrow") then
obj:get_inventory():add_item("main", "mcl_potions:"..name.."_arrow")
minetest.sound_play("item_drop_pickup", {
pos = pos,
max_hear_distance = 16,
gain = 1.0,
}, true)
end
end
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 ~= self._shooter and obj:is_player() then
ok = true
elseif obj:get_luaentity() ~= nil then
if obj ~= self._shooter and obj:get_luaentity()._cmi_is_mob 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 (is_player or (lua and lua._cmi_is_mob)) 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 nodedef = minetest.registered_nodes[nn]
if (not nodedef) or nodedef.walkable then
-- There's a node in the way. Delete arrow without damage
self.object:remove()
return
end
end
end
-- Punch target object but avoid hurting enderman.
if lua then
if lua.name ~= "mobs_mc:enderman" then
obj:punch(self.object, 1.0, {
full_punch_interval=1.0,
damage_groups={fleshy=self._damage},
}, nil)
def.potion_fun(obj)
end
else
obj:punch(self.object, 1.0, {
full_punch_interval=1.0,
damage_groups={fleshy=self._damage},
}, nil)
def.potion_fun(obj)
end
if is_player then
if self._shooter and self._shooter:is_player() then
-- “Ding” sound for hitting another player
minetest.sound_play({name="mcl_bows_hit_player", gain=0.1}, {to_player=self._shooter}, true)
def.potion_fun(obj)
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
end
self.object:remove()
return
end
end
end
-- Check for node collision
if self._lastpos.x~=nil and not self._stuck then
local nodedef = 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})
-- 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 (nodedef and nodedef.liquidtype ~= "none") then
-- Slow down arrow in liquids
local v = nodedef.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,
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)
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
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
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_potions:"..name.."_arrow_entity", ARROW_ENTITY)
if minetest.get_modpath("mcl_bows") then
minetest.register_craft({
output = 'mcl_potions:'..name..'_arrow 8',
recipe = {
{'mcl_bows:arrow','mcl_bows:arrow','mcl_bows:arrow'},
{'mcl_bows:arrow','mcl_potions:'..name..'_lingering','mcl_bows:arrow'},
{'mcl_bows:arrow','mcl_bows:arrow','mcl_bows:arrow'}
}
})
end
if minetest.get_modpath("doc_identifier") ~= nil then
doc.sub.identifier.register_object("mcl_bows:arrow_entity", "craftitems", "mcl_bows:arrow")
end
end