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MineClone2/mods/ITEMS/mcl_throwing/throwable.lua

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--
-- Snowballs and other throwable items
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--
local GRAVITY = tonumber(minetest.setting_get("movement_gravity"))
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local entity_mapping = {
["mcl_throwing:snowball"] = "mcl_throwing:snowball_entity",
["mcl_throwing:egg"] = "mcl_throwing:egg_entity",
["mcl_throwing:ender_pearl"] = "mcl_throwing:ender_pearl_entity",
}
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local velocities = {
["mcl_throwing:snowball_entity"] = 22,
["mcl_throwing:egg_entity"] = 22,
["mcl_throwing:ender_pearl_entity"] = 22,
}
mcl_throwing.throw = function(throw_item, pos, dir, velocity)
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if velocity == nil then
velocity = velocities[entity_name]
end
if velocity == nil then
velocity = 22
end
local itemstring = ItemStack(throw_item):get_name()
local obj = minetest.add_entity(pos, entity_mapping[itemstring])
obj:setvelocity({x=dir.x*velocity, y=dir.y*velocity, z=dir.z*velocity})
obj:setacceleration({x=dir.x*-3, y=-GRAVITY, z=dir.z*-3})
return obj
end
-- Throw item
local throw_function = function(entity_name, velocity)
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local func = function(item, player, pointed_thing)
local playerpos = player:getpos()
local dir = player:get_look_dir()
local obj = mcl_throwing.throw(item, {x=playerpos.x, y=playerpos.y+1.5, z=playerpos.z}, dir, velocity)
obj:get_luaentity()._thrower = player:get_player_name()
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if not minetest.setting_getbool("creative_mode") then
item:take_item()
end
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return item
end
return func
end
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-- Staticdata handling because objects may want to be reloaded
local get_staticdata = function(self)
local data = {
_lastpos = self._lastpos,
_thrower = self._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
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-- The snowball entity
local snowball_ENTITY={
physical = false,
timer=0,
textures = {"mcl_throwing_snowball.png"},
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visual_size = {x=0.5, y=0.5},
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collisionbox = {0,0,0,0,0,0},
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get_staticdata = get_staticdata,
on_activate = on_activate,
_lastpos={},
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}
local egg_ENTITY={
physical = false,
timer=0,
textures = {"mcl_throwing_egg.png"},
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visual_size = {x=0.45, y=0.45},
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collisionbox = {0,0,0,0,0,0},
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get_staticdata = get_staticdata,
on_activate = on_activate,
_lastpos={},
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}
-- Ender pearl entity
local pearl_ENTITY={
physical = false,
timer=0,
textures = {"mcl_throwing_ender_pearl.png"},
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visual_size = {x=0.9, y=0.9},
collisionbox = {0,0,0,0,0,0},
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get_staticdata = get_staticdata,
on_activate = on_activate,
_lastpos={},
_thrower = nil, -- Player ObjectRef of the player who threw the ender pearl
}
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-- Snowball on_step()--> called when snowball is moving.
local snowball_on_step = function(self, dtime)
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self.timer=self.timer+dtime
local pos = self.object:getpos()
local node = minetest.get_node(pos)
local def = minetest.registered_nodes[node.name]
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-- Destroy when hitting a solid node
if self._lastpos.x~=nil then
if (def and def.walkable) or not def then
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 egg
local egg_on_step = function(self, dtime)
self.timer=self.timer+dtime
local pos = self.object:getpos()
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
-- 1/8 chance to spawn a chick
-- FIXME: Spawn chicks instead of chickens
-- FIXME: Chicks have a quite good chance to spawn in walls
local r = math.random(1,8)
if r == 1 then
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])
minetest.add_entity(pos, "mobs_mc:chicken")
end
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 ender pearl
local pearl_on_step = function(self, dtime)
self.timer=self.timer+dtime
local pos = self.object:getpos()
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
local player = minetest.get_player_by_name(self._thrower)
if player then
-- Teleport and hurt player
player:setpos(pos)
player:set_hp(player:get_hp() - 5)
end
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self.object:remove()
return
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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
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end
snowball_ENTITY.on_step = snowball_on_step
egg_ENTITY.on_step = egg_on_step
pearl_ENTITY.on_step = pearl_on_step
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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)
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-- Snowball
minetest.register_craftitem("mcl_throwing:snowball", {
description = "Snowball",
inventory_image = "mcl_throwing_snowball.png",
stack_max = 16,
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on_use = throw_function("mcl_throwing:snowball_entity"),
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on_construct = function(pos)
pos.y = pos.y - 1
if minetest.get_node(pos).name == "default:dirt_with_grass" then
minetest.set_node(pos, {name="default:dirt_with_snow"})
end
end,
})
-- Egg
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minetest.register_craftitem("mcl_throwing:egg", {
description = "Egg",
inventory_image = "mcl_throwing_egg.png",
stack_max = 16,
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on_use = throw_function("mcl_throwing:egg_entity"),
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groups = { craftitem = 1 },
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})
-- Ender Pearl
minetest.register_craftitem("mcl_throwing:ender_pearl", {
description = "Ender Pearl",
wield_image = "mcl_throwing_ender_pearl.png",
inventory_image = "mcl_throwing_ender_pearl.png",
stack_max = 16,
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on_use = throw_function("mcl_throwing:ender_pearl_entity"),
})