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MineClone2/mods/ITEMS/mcl_throwing/init.lua

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mcl_throwing = {}
local S = minetest.get_translator("mcl_throwing")
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local mod_death_messages = minetest.get_modpath("mcl_death_messages")
local mod_fishing = minetest.get_modpath("mcl_fishing")
--
-- Snowballs and other throwable items
--
local GRAVITY = tonumber(minetest.settings:get("movement_gravity"))
local entity_mapping = {
["mcl_throwing:flying_bobber"] = "mcl_throwing:flying_bobber_entity",
["mcl_throwing:snowball"] = "mcl_throwing:snowball_entity",
["mcl_throwing:egg"] = "mcl_throwing:egg_entity",
["mcl_throwing:ender_pearl"] = "mcl_throwing:ender_pearl_entity",
}
local velocities = {
["mcl_throwing:flying_bobber_entity"] = 5,
["mcl_throwing:snowball_entity"] = 22,
["mcl_throwing:egg_entity"] = 22,
["mcl_throwing:ender_pearl_entity"] = 22,
}
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mcl_throwing.throw = function(throw_item, pos, dir, velocity, thrower)
if velocity == nil then
velocity = velocities[throw_item]
end
if velocity == nil then
velocity = 22
end
local itemstring = ItemStack(throw_item):get_name()
local obj = minetest.add_entity(pos, entity_mapping[itemstring])
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obj:set_velocity({x=dir.x*velocity, y=dir.y*velocity, z=dir.z*velocity})
obj:set_acceleration({x=dir.x*-3, y=-GRAVITY, z=dir.z*-3})
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if thrower then
obj:get_luaentity()._thrower = thrower
end
return obj
end
-- Throw item
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local player_throw_function = function(entity_name, velocity)
local func = function(item, player, pointed_thing)
local playerpos = player:get_pos()
local dir = player:get_look_dir()
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local obj = mcl_throwing.throw(item, {x=playerpos.x, y=playerpos.y+1.5, z=playerpos.z}, dir, velocity, player:get_player_name())
if not minetest.settings:get_bool("creative_mode") then
item:take_item()
end
return item
end
return func
end
local dispense_function = function(stack, dispenserpos, droppos, dropnode, dropdir)
-- Launch throwable item
local shootpos = vector.add(dispenserpos, vector.multiply(dropdir, 0.51))
mcl_throwing.throw(stack:get_name(), shootpos, dropdir)
end
-- Staticdata handling because objects may want to be reloaded
local get_staticdata = function(self)
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local thrower
-- Only save thrower if it's a player name
if type(self._thrower) == "string" then
thrower = self._thrower
end
local data = {
_lastpos = self._lastpos,
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_thrower = thrower,
}
return minetest.serialize(data)
end
local on_activate = function(self, staticdata, dtime_s)
local data = minetest.deserialize(staticdata)
if data then
self._lastpos = data._lastpos
self._thrower = data._thrower
end
end
-- The snowball entity
local snowball_ENTITY={
physical = false,
timer=0,
textures = {"mcl_throwing_snowball.png"},
visual_size = {x=0.5, y=0.5},
collisionbox = {0,0,0,0,0,0},
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pointable = false,
get_staticdata = get_staticdata,
on_activate = on_activate,
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_thrower = nil,
_lastpos={},
}
local egg_ENTITY={
physical = false,
timer=0,
textures = {"mcl_throwing_egg.png"},
visual_size = {x=0.45, y=0.45},
collisionbox = {0,0,0,0,0,0},
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pointable = false,
get_staticdata = get_staticdata,
on_activate = on_activate,
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_thrower = nil,
_lastpos={},
}
-- Ender pearl entity
local pearl_ENTITY={
physical = false,
timer=0,
textures = {"mcl_throwing_ender_pearl.png"},
visual_size = {x=0.9, y=0.9},
collisionbox = {0,0,0,0,0,0},
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pointable = false,
get_staticdata = get_staticdata,
on_activate = on_activate,
_lastpos={},
_thrower = nil, -- Player ObjectRef of the player who threw the ender pearl
}
local flying_bobber_ENTITY={
physical = false,
timer=0,
textures = {"mcl_fishing_bobber.png"}, --FIXME: Replace with correct texture.
visual_size = {x=0.5, y=0.5},
collisionbox = {0,0,0,0,0,0},
pointable = false,
get_staticdata = get_staticdata,
on_activate = on_activate,
_lastpos={},
_thrower = nil,
objtype="fishing",
}
local check_object_hit = function(self, pos, dmg)
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for _,object in pairs(minetest.get_objects_inside_radius(pos, 1.5)) do
local entity = object:get_luaentity()
if entity
and entity.name ~= self.object:get_luaentity().name then
if object:is_player() and self._thrower ~= object:get_player_name() then
-- TODO: Deal knockback
self.object:remove()
return true
elseif entity._cmi_is_mob == true and (self._thrower ~= object) then
-- FIXME: Knockback is broken
object:punch(self.object, 1.0, {
full_punch_interval = 1.0,
damage_groups = dmg,
}, nil)
return true
end
end
end
return false
end
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local snowball_particles = function(pos, vel)
local vel = vector.normalize(vector.multiply(vel, -1))
minetest.add_particlespawner({
amount = 20,
time = 0.001,
minpos = pos,
maxpos = pos,
minvel = vector.add({x=-2, y=3, z=-2}, vel),
maxvel = vector.add({x=2, y=5, z=2}, vel),
minacc = {x=0, y=-9.81, z=0},
maxacc = {x=0, y=-9.81, z=0},
minexptime = 1,
maxexptime = 3,
minsize = 0.7,
maxsize = 0.7,
collisiondetection = true,
collision_removal = true,
object_collision = false,
texture = "weather_pack_snow_snowflake"..math.random(1,2)..".png",
})
end
-- Snowball on_step()--> called when snowball is moving.
local snowball_on_step = function(self, dtime)
self.timer=self.timer+dtime
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local pos = self.object:get_pos()
local node = minetest.get_node(pos)
local def = minetest.registered_nodes[node.name]
-- Destroy when hitting a solid node
if self._lastpos.x~=nil then
if (def and def.walkable) or not def then
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minetest.sound_play("mcl_throwing_snowball_impact_hard", { pos = self.object:get_pos(), max_hear_distance=16, gain=0.7 }, true)
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snowball_particles(self._lastpos, self.object:get_velocity())
self.object:remove()
return
end
end
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if check_object_hit(self, pos, {snowball_vulnerable = 3}) then
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minetest.sound_play("mcl_throwing_snowball_impact_soft", { pos = self.object:get_pos(), max_hear_distance=16, gain=0.7 }, true)
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snowball_particles(pos, self.object:get_velocity())
self.object:remove()
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return
end
self._lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set _lastpos-->Node will be added at last pos outside the node
end
-- Movement function of egg
local egg_on_step = function(self, dtime)
self.timer=self.timer+dtime
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local pos = self.object:get_pos()
local node = minetest.get_node(pos)
local def = minetest.registered_nodes[node.name]
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-- Destroy when hitting a solid node with chance to spawn chicks
if self._lastpos.x~=nil then
if (def and def.walkable) or not def then
-- 1/8 chance to spawn a chick
-- FIXME: Chicks have a quite good chance to spawn in walls
local r = math.random(1,8)
-- Turn given object into a child
local make_child= function(object)
local ent = object:get_luaentity()
object:set_properties({
visual_size = { x = ent.base_size.x/2, y = ent.base_size.y/2 },
collisionbox = {
ent.base_colbox[1]/2,
ent.base_colbox[2]/2,
ent.base_colbox[3]/2,
ent.base_colbox[4]/2,
ent.base_colbox[5]/2,
ent.base_colbox[6]/2,
}
})
ent.child = true
end
if r == 1 then
make_child(minetest.add_entity(self._lastpos, "mobs_mc:chicken"))
-- BONUS ROUND: 1/32 chance to spawn 3 additional chicks
local r = math.random(1,32)
if r == 1 then
local offsets = {
{ x=0.7, y=0, z=0 },
{ x=-0.7, y=0, z=-0.7 },
{ x=-0.7, y=0, z=0.7 },
}
for o=1, 3 do
local pos = vector.add(self._lastpos, offsets[o])
make_child(minetest.add_entity(pos, "mobs_mc:chicken"))
end
end
end
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minetest.sound_play("mcl_throwing_egg_impact", { pos = self.object:get_pos(), max_hear_distance=10, gain=0.5 }, true)
self.object:remove()
return
end
end
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-- Destroy when hitting a mob or player (no chick spawning)
if check_object_hit(self, pos) then
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minetest.sound_play("mcl_throwing_egg_impact", { pos = self.object:get_pos(), max_hear_distance=10, gain=0.5 }, true)
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self.object:remove()
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return
end
self._lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
end
-- Movement function of ender pearl
local pearl_on_step = function(self, dtime)
self.timer=self.timer+dtime
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local pos = self.object:get_pos()
pos.y = math.floor(pos.y)
local node = minetest.get_node(pos)
local nn = node.name
local def = minetest.registered_nodes[node.name]
-- Destroy when hitting a solid node
if self._lastpos.x~=nil then
local walkable = (def and def.walkable)
-- No teleport for hitting ignore for now. Otherwise the player could get stuck.
-- FIXME: This also means the player loses an ender pearl for throwing into unloaded areas
if node.name == "ignore" then
self.object:remove()
-- Activate when hitting a solid node or a plant
elseif walkable or nn == "mcl_core:vine" or nn == "mcl_core:deadbush" or minetest.get_item_group(nn, "flower") ~= 0 or minetest.get_item_group(nn, "sapling") ~= 0 or minetest.get_item_group(nn, "plant") ~= 0 or minetest.get_item_group(nn, "mushroom") ~= 0 or not def then
local player = minetest.get_player_by_name(self._thrower)
if player then
-- Teleport and hurt player
-- First determine good teleport position
local dir = {x=0, y=0, z=0}
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local v = self.object:get_velocity()
if walkable then
local vc = table.copy(v) -- vector for calculating
-- Node is walkable, we have to find a place somewhere outside of that node
vc = vector.normalize(vc)
-- Zero-out the two axes with a lower absolute value than
-- the axis with the strongest force
local lv, ld
lv, ld = math.abs(vc.y), "y"
if math.abs(vc.x) > lv then
lv, ld = math.abs(vc.x), "x"
end
if math.abs(vc.z) > lv then
lv, ld = math.abs(vc.z), "z"
end
if ld ~= "x" then vc.x = 0 end
if ld ~= "y" then vc.y = 0 end
if ld ~= "z" then vc.z = 0 end
-- Final tweaks to the teleporting pos, based on direction
-- Impact from the side
dir.x = vc.x * -1
dir.z = vc.z * -1
-- Special case: top or bottom of node
if vc.y > 0 then
-- We need more space when impact is from below
dir.y = -2.3
elseif vc.y < 0 then
-- Standing on top
dir.y = 0.5
end
end
-- If node was not walkable, no modification to pos is made.
-- Final teleportation position
local telepos = vector.add(pos, dir)
local telenode = minetest.get_node(telepos)
--[[ It may be possible that telepos is walkable due to the algorithm.
Especially when the ender pearl is faster horizontally than vertical.
This applies final fixing, just to be sure we're not in a walkable node ]]
if not minetest.registered_nodes[telenode.name] or minetest.registered_nodes[telenode.name].walkable then
if v.y < 0 then
telepos.y = telepos.y + 0.5
else
telepos.y = telepos.y - 2.3
end
end
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local oldpos = player:get_pos()
-- Teleport and hurt player
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player:set_pos(telepos)
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player:set_hp(player:get_hp() - 5, { type = "fall", from = "mod" })
-- 5% chance to spawn endermite at the player's origin
local r = math.random(1,20)
if r == 1 then
minetest.add_entity(oldpos, "mobs_mc:endermite")
end
end
self.object:remove()
return
end
end
self._lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
end
-- Movement function of flying bobber
local flying_bobber_on_step = function(self, dtime)
self.timer=self.timer+dtime
local pos = self.object:get_pos()
local node = minetest.get_node(pos)
local def = minetest.registered_nodes[node.name]
--local player = minetest.get_player_by_name(self._thrower)
-- Destroy when hitting a solid node
if self._lastpos.x~=nil then
if (def and (def.walkable or def.liquidtype == "flowing" or def.liquidtype == "source")) or not def then
local make_child= function(object)
local ent = object:get_luaentity()
ent.player = self._thrower
ent.child = true
end
make_child(minetest.add_entity(self._lastpos, "mcl_fishing:bobber_entity"))
self.object:remove()
return
end
end
self._lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
end
snowball_ENTITY.on_step = snowball_on_step
egg_ENTITY.on_step = egg_on_step
pearl_ENTITY.on_step = pearl_on_step
flying_bobber_ENTITY.on_step = flying_bobber_on_step
minetest.register_entity("mcl_throwing:snowball_entity", snowball_ENTITY)
minetest.register_entity("mcl_throwing:egg_entity", egg_ENTITY)
minetest.register_entity("mcl_throwing:ender_pearl_entity", pearl_ENTITY)
minetest.register_entity("mcl_throwing:flying_bobber_entity", flying_bobber_ENTITY)
local how_to_throw = S("Use the punch key to throw.")
-- Snowball
minetest.register_craftitem("mcl_throwing:snowball", {
description = S("Snowball"),
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_tt_help = S("Throwable"),
_doc_items_longdesc = S("Snowballs can be thrown or launched from a dispenser for fun. Hitting something with a snowball does nothing."),
_doc_items_usagehelp = how_to_throw,
inventory_image = "mcl_throwing_snowball.png",
stack_max = 16,
groups = { weapon_ranged = 1 },
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on_use = player_throw_function("mcl_throwing:snowball_entity"),
_on_dispense = dispense_function,
})
-- Egg
minetest.register_craftitem("mcl_throwing:egg", {
description = S("Egg"),
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_tt_help = S("Throwable").."\n"..S("Chance to hatch chicks when broken"),
_doc_items_longdesc = S("Eggs can be thrown or launched from a dispenser and breaks on impact. There is a small chance that 1 or even 4 chicks will pop out of the egg."),
_doc_items_usagehelp = how_to_throw,
inventory_image = "mcl_throwing_egg.png",
stack_max = 16,
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on_use = player_throw_function("mcl_throwing:egg_entity"),
_on_dispense = dispense_function,
groups = { craftitem = 1 },
})
-- Ender Pearl
minetest.register_craftitem("mcl_throwing:ender_pearl", {
description = S("Ender Pearl"),
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_tt_help = S("Throwable").."\n"..minetest.colorize("#FFFF00", S("Teleports you on impact for cost of 5 HP")),
_doc_items_longdesc = S("An ender pearl is an item which can be used for teleportation at the cost of health. It can be thrown and teleport the thrower to its impact location when it hits a solid block or a plant. Each teleportation hurts the user by 5 hit points."),
_doc_items_usagehelp = how_to_throw,
wield_image = "mcl_throwing_ender_pearl.png",
inventory_image = "mcl_throwing_ender_pearl.png",
stack_max = 16,
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on_use = player_throw_function("mcl_throwing:ender_pearl_entity"),
groups = { transport = 1 },
})
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