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MineClone2-finecraft/mods/ITEMS/mcl_end/eye_of_ender.lua

157 lines
5.2 KiB
Lua

-- Eye of Ender
local S = minetest.get_translator("mcl_end")
minetest.register_entity("mcl_end:ender_eye", {
physical = false,
textures = {"mcl_end_ender_eye.png"},
visual_size = {x=1.5, y=1.5},
collisionbox = {0,0,0,0,0,0},
pointable = false,
-- Save and restore age
get_staticdata = function(self)
return tostring(self._age)
end,
on_activate = function(self, staticdata, dtime_s)
local age = tonumber(staticdata)
if type(age) == "number" then
self._age = age
if self._age >= 2 then
self._phase = 1
else
self._phase = 0
end
end
end,
on_step = function(self, dtime)
self._age = self._age + dtime
if self._age >= 3 then
-- End of life
local r = math.random(1,5)
if r == 1 or minetest.is_creative_enabled("") then
-- 20% chance to get destroyed completely.
-- 100% if in Creative Mode
self.object:remove()
return
else
-- 80% to drop as an item
local pos = self.object:get_pos()
local v = self.object:get_velocity()
self.object:remove()
local item = minetest.add_item(pos, "mcl_end:ender_eye")
item:set_velocity(v)
return
end
elseif self._age >= 2 then
if self._phase == 0 then
self._phase = 1
-- Stop the eye and wait for another second.
-- The vertical speed changes are just eye candy.
self.object:set_acceleration({x=0, y=-3, z=0})
self.object:set_velocity({x=0, y=self.object:get_velocity().y*0.2, z=0})
end
else
-- Fly normally and generate particles
local pos = self.object:get_pos()
pos.x = pos.x + math.random(-1, 1)*0.5
pos.y = pos.y + math.random(-1, 0)*0.5
pos.z = pos.z + math.random(-1, 1)*0.5
minetest.add_particle({
pos = pos,
texture = "mcl_particles_teleport.png",
expirationtime = 1,
velocity = {x=math.random(-1, 1)*0.1, y=math.random(-30, 0)*0.1, z=math.random(-1, 1)*0.1},
acceleration = {x=0, y=0, z=0},
size = 2.5,
})
end
end,
_age = 0, -- age in seconds
_phase = 0, -- phase 0: flying. phase 1: idling in mid air, about to drop or shatter
})
minetest.register_craftitem("mcl_end:ender_eye", {
description = S("Eye of Ender"),
_tt_help = S("Guides the way to the mysterious End dimension"),
_doc_items_longdesc = S("This item is used to locate End portal shrines in the Overworld and to activate End portals.") .. "\n" .. S("NOTE: The End dimension is currently incomplete and might change in future versions."),
_doc_items_usagehelp = S("Use the attack key to release the eye of ender. It will rise and fly in the horizontal direction of the closest end portal shrine. If you're very close, the eye of ender will take the direct path to the End portal shrine instead. After a few seconds, it stops. It may drop as an item, but there's a 20% chance it shatters.") .. "\n" .. S("To activate an End portal, eyes of ender need to be placed into each block of an intact End portal frame."),
wield_image = "mcl_end_ender_eye.png",
inventory_image = "mcl_end_ender_eye.png",
stack_max = 64,
-- Throw eye of ender to make it fly to the closest stronghold
on_use = function(itemstack, user, pointed_thing)
if user == nil then
return
end
local origin = user:get_pos()
origin.y = origin.y + 1.5
local strongholds = mcl_structures.get_registered_structures("stronghold")
local dim = mcl_worlds.pos_to_dimension(origin)
local is_creative = minetest.is_creative_enabled(user:get_player_name())
-- Just drop the eye of ender if there are no strongholds
if #strongholds <= 0 or dim ~= "overworld" then
if not is_creative then
minetest.item_drop(ItemStack("mcl_end:ender_eye"), user, user:get_pos())
itemstack:take_item()
end
return itemstack
end
-- Find closest stronghold.
-- Note: Only the horizontal axes are taken into account.
local closest_stronghold
local lowest_dist
for s=1, #strongholds do
local h_pos = table.copy(strongholds[s].pos)
local h_origin = table.copy(origin)
h_pos.y = 0
h_origin.y = 0
local dist = vector.distance(h_origin, h_pos)
if not closest_stronghold then
closest_stronghold = strongholds[s]
lowest_dist = dist
else
if dist < lowest_dist then
closest_stronghold = strongholds[s]
lowest_dist = dist
end
end
end
-- Throw it!
local obj = minetest.add_entity(origin, "mcl_end:ender_eye")
local dir
if lowest_dist <= 25 then
local velocity = 4
-- Stronghold is close: Fly directly to stronghold and take Y into account.
dir = vector.normalize(vector.direction(origin, closest_stronghold.pos))
obj:set_velocity({x=dir.x*velocity, y=dir.y*velocity, z=dir.z*velocity})
else
local velocity = 12
-- Don't care about Y if stronghold is still far away.
-- Fly to direction of X/Z, and always upwards so it can be seen easily.
local o = {x=origin.x, y=0, z=origin.z}
local s = {x=closest_stronghold.pos.x, y=0, z=closest_stronghold.pos.z}
dir = vector.normalize(vector.direction(o, s))
obj:set_acceleration({x=dir.x*-3, y=4, z=dir.z*-3})
obj:set_velocity({x=dir.x*velocity, y=3, z=dir.z*velocity})
end
if not is_creative then
itemstack:take_item()
end
return itemstack
end,
})
minetest.register_craft({
type = "shapeless",
output = "mcl_end:ender_eye",
recipe = {"mcl_mobitems:blaze_powder", "mcl_throwing:ender_pearl"},
})