458 lines
13 KiB
Lua
458 lines
13 KiB
Lua
-- Parameters
|
|
|
|
local TCAVE = 0.6
|
|
local nobj_cave = nil
|
|
|
|
-- Portal frame sizes
|
|
local FRAME_SIZE_X_MIN = 4
|
|
local FRAME_SIZE_Y_MIN = 5
|
|
local FRAME_SIZE_X_MAX = 23
|
|
local FRAME_SIZE_Y_MAX = 23
|
|
|
|
-- 3D noise
|
|
local np_cave = {
|
|
offset = 0,
|
|
scale = 1,
|
|
spread = {x = 384, y = 128, z = 384},
|
|
seed = 59033,
|
|
octaves = 5,
|
|
persist = 0.7
|
|
}
|
|
|
|
-- Table of objects (including players) which recently teleported by a
|
|
-- Nether portal. Those objects have a brief cooloff period before they
|
|
-- can teleport again. This prevents annoying back-and-forth teleportation.
|
|
local portal_cooloff = {}
|
|
|
|
-- Destroy portal if pos (portal frame or portal node) got destroyed
|
|
local destroy_portal = function(pos)
|
|
-- Deactivate Nether portal
|
|
local meta = minetest.get_meta(pos)
|
|
local p1 = minetest.string_to_pos(meta:get_string("portal_frame1"))
|
|
local p2 = minetest.string_to_pos(meta:get_string("portal_frame2"))
|
|
if not p1 or not p2 then
|
|
return
|
|
end
|
|
|
|
local counter = 1
|
|
|
|
local mp1
|
|
for x = p1.x, p2.x do
|
|
for y = p1.y, p2.y do
|
|
for z = p1.z, p2.z do
|
|
local p = vector.new(x, y, z)
|
|
local m = minetest.get_meta(p)
|
|
if counter == 2 then
|
|
--[[ Only proceed if the second node still has metadata.
|
|
(first node is a corner and not needed for the portal)
|
|
If it doesn't have metadata, another node propably triggred the delection
|
|
routine earlier, so we bail out earlier to avoid an infinite cascade
|
|
of on_destroy events. ]]
|
|
mp1 = minetest.string_to_pos(m:get_string("portal_frame1"))
|
|
if not mp1 then
|
|
return
|
|
end
|
|
end
|
|
local nn = minetest.get_node(p).name
|
|
if nn == "mcl_core:obsidian" or nn == "mcl_portals:portal" then
|
|
-- Remove portal nodes, but not myself
|
|
if nn == "mcl_portals:portal" and not vector.equals(p, pos) then
|
|
minetest.remove_node(p)
|
|
end
|
|
-- Clear metadata of portal nodes and the frame
|
|
m:set_string("portal_frame1", "")
|
|
m:set_string("portal_frame2", "")
|
|
m:set_string("portal_target", "")
|
|
end
|
|
counter = counter + 1
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
minetest.register_node("mcl_portals:portal", {
|
|
description = "Nether Portal",
|
|
_doc_items_longdesc = "A Nether portal teleports creatures and objects to the hot and dangerous Nether dimension (and back!). Enter at your own risk!",
|
|
_doc_items_usagehelp = "Stand in the portal for a moment to activate the teleportation. Entering a Nether portal for the first time will also create a new portal in the other dimension. If a Nether portal has been built in the Nether, it will lead to the Overworld. A Nether portal is destroyed if the any of the obsidian which surrounds it is destroyed, or if it was caught in an explosion.",
|
|
|
|
tiles = {
|
|
"blank.png",
|
|
"blank.png",
|
|
"blank.png",
|
|
"blank.png",
|
|
{
|
|
name = "mcl_portals_portal.png",
|
|
animation = {
|
|
type = "vertical_frames",
|
|
aspect_w = 16,
|
|
aspect_h = 16,
|
|
length = 0.5,
|
|
},
|
|
},
|
|
{
|
|
name = "mcl_portals_portal.png",
|
|
animation = {
|
|
type = "vertical_frames",
|
|
aspect_w = 16,
|
|
aspect_h = 16,
|
|
length = 0.5,
|
|
},
|
|
},
|
|
},
|
|
drawtype = "nodebox",
|
|
paramtype = "light",
|
|
paramtype2 = "facedir",
|
|
sunlight_propagates = true,
|
|
use_texture_alpha = true,
|
|
walkable = false,
|
|
diggable = false,
|
|
pointable = false,
|
|
buildable_to = false,
|
|
is_ground_content = false,
|
|
drop = "",
|
|
light_source = 11,
|
|
post_effect_color = {a = 180, r = 128, g = 23, b = 23},
|
|
alpha = 192,
|
|
node_box = {
|
|
type = "fixed",
|
|
fixed = {
|
|
{-0.5, -0.5, -0.1, 0.5, 0.5, 0.1},
|
|
},
|
|
},
|
|
groups = {not_in_creative_inventory = 1},
|
|
on_destruct = destroy_portal,
|
|
|
|
_mcl_hardness = -1,
|
|
_mcl_blast_resistance = 0,
|
|
})
|
|
|
|
-- Functions
|
|
--Build arrival portal
|
|
local function build_portal(pos, target, is_rebuilding)
|
|
local p = {x = pos.x - 1, y = pos.y - 1, z = pos.z}
|
|
local p1 = {x = pos.x - 1, y = pos.y - 1, z = pos.z}
|
|
local p2 = {x = p1.x + 3, y = p1.y + 4, z = p1.z}
|
|
|
|
for i = 1, FRAME_SIZE_Y_MIN - 1 do
|
|
minetest.set_node(p, {name = "mcl_core:obsidian"})
|
|
p.y = p.y + 1
|
|
end
|
|
for i = 1, FRAME_SIZE_X_MIN - 1 do
|
|
minetest.set_node(p, {name = "mcl_core:obsidian"})
|
|
p.x = p.x + 1
|
|
end
|
|
for i = 1, FRAME_SIZE_Y_MIN - 1 do
|
|
minetest.set_node(p, {name = "mcl_core:obsidian"})
|
|
p.y = p.y - 1
|
|
end
|
|
for i = 1, FRAME_SIZE_X_MIN - 1 do
|
|
minetest.set_node(p, {name = "mcl_core:obsidian"})
|
|
p.x = p.x - 1
|
|
end
|
|
|
|
for x = p1.x, p2.x do
|
|
for y = p1.y, p2.y do
|
|
p = {x = x, y = y, z = p1.z}
|
|
if not ((x == p1.x or x == p2.x) and (y == p1.y or y == p2.y)) then
|
|
if not (x == p1.x or x == p2.x or y == p1.y or y == p2.y) then
|
|
minetest.set_node(p, {name = "mcl_portals:portal", param2 = 0})
|
|
end
|
|
local meta = minetest.get_meta(p)
|
|
meta:set_string("portal_frame1", minetest.pos_to_string(p1))
|
|
meta:set_string("portal_frame2", minetest.pos_to_string(p2))
|
|
meta:set_string("portal_target", minetest.pos_to_string(target))
|
|
end
|
|
|
|
if y ~= p1.y and not is_rebuilding then
|
|
for z = -2, 2 do
|
|
if z ~= 0 then
|
|
p.z = p.z + z
|
|
if minetest.registered_nodes[
|
|
minetest.get_node(p).name].is_ground_content then
|
|
minetest.remove_node(p)
|
|
end
|
|
p.z = p.z - z
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
local function find_nether_target_y(target_x, target_z)
|
|
local start_y = mcl_vars.mg_nether_min + math.random(38, 117) -- Search start
|
|
if not nobj_cave then
|
|
nobj_cave = minetest.get_perlin(np_cave)
|
|
end
|
|
local air = 4
|
|
|
|
for y = start_y, start_y -117, -1 do
|
|
local nval_cave = nobj_cave:get3d({x = target_x, y = y, z = target_z})
|
|
|
|
if nval_cave > TCAVE then -- Cavern
|
|
air = air + 1
|
|
else -- Not cavern, check if 4 nodes of space above
|
|
if air >= 4 then
|
|
return y + 2
|
|
else -- Not enough space, reset air to zero
|
|
air = 0
|
|
end
|
|
end
|
|
end
|
|
|
|
return start_y -- Fallback
|
|
end
|
|
|
|
local function move_check(p1, max, dir)
|
|
local p = {x = p1.x, y = p1.y, z = p1.z}
|
|
local d = math.sign(max - p1[dir])
|
|
local min = p[dir]
|
|
|
|
for k = min, max, d do
|
|
p[dir] = k
|
|
local node = minetest.get_node(p)
|
|
-- Check for obsidian (except at corners)
|
|
if k ~= min and k ~= max and node.name ~= "mcl_core:obsidian" then
|
|
return false
|
|
end
|
|
-- Abort if any of the portal frame blocks already has metadata.
|
|
-- This mod does not yet portals which neighbor each other directly.
|
|
-- TODO: Reorganize the way how portal frame coordinates are stored.
|
|
if node.name == "mcl_core:obsidian" then
|
|
local meta = minetest.get_meta(p)
|
|
local pframe1 = meta:get_string("portal_frame1")
|
|
if minetest.string_to_pos(pframe1) ~= nil then
|
|
return false
|
|
end
|
|
end
|
|
end
|
|
|
|
return true
|
|
end
|
|
|
|
local function check_portal(p1, p2)
|
|
if p1.x ~= p2.x then
|
|
if not move_check(p1, p2.x, "x") then
|
|
return false
|
|
end
|
|
if not move_check(p2, p1.x, "x") then
|
|
return false
|
|
end
|
|
elseif p1.z ~= p2.z then
|
|
if not move_check(p1, p2.z, "z") then
|
|
return false
|
|
end
|
|
if not move_check(p2, p1.z, "z") then
|
|
return false
|
|
end
|
|
else
|
|
return false
|
|
end
|
|
|
|
if not move_check(p1, p2.y, "y") then
|
|
return false
|
|
end
|
|
if not move_check(p2, p1.y, "y") then
|
|
return false
|
|
end
|
|
|
|
return true
|
|
end
|
|
|
|
local function is_portal(pos)
|
|
local xsize, ysize = FRAME_SIZE_X_MIN-1, FRAME_SIZE_Y_MIN-1
|
|
for d = -xsize, xsize do
|
|
for y = -ysize, ysize do
|
|
local px = {x = pos.x + d, y = pos.y + y, z = pos.z}
|
|
local pz = {x = pos.x, y = pos.y + y, z = pos.z + d}
|
|
|
|
if check_portal(px, {x = px.x + xsize, y = px.y + ysize, z = px.z}) then
|
|
return px, {x = px.x + xsize, y = px.y + ysize, z = px.z}
|
|
end
|
|
if check_portal(pz, {x = pz.x, y = pz.y + ysize, z = pz.z + xsize}) then
|
|
return pz, {x = pz.x, y = pz.y + ysize, z = pz.z + xsize}
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
local function make_portal(pos)
|
|
local p1, p2 = is_portal(pos)
|
|
if not p1 or not p2 then
|
|
return false
|
|
end
|
|
|
|
for d = 1, 2 do
|
|
for y = p1.y + 1, p2.y - 1 do
|
|
local p
|
|
if p1.z == p2.z then
|
|
p = {x = p1.x + d, y = y, z = p1.z}
|
|
else
|
|
p = {x = p1.x, y = y, z = p1.z + d}
|
|
end
|
|
if minetest.get_node(p).name ~= "air" then
|
|
return false
|
|
end
|
|
end
|
|
end
|
|
|
|
local param2
|
|
if p1.z == p2.z then
|
|
param2 = 0
|
|
else
|
|
param2 = 1
|
|
end
|
|
|
|
local target = {x = p1.x, y = p1.y, z = p1.z}
|
|
target.x = target.x + 1
|
|
if target.y < mcl_vars.mg_nether_max and target.y > mcl_vars.mg_nether_min then
|
|
target.y = math.random(mcl_vars.mg_overworld_min + 40, mcl_vars.mg_overworld_min + 96)
|
|
else
|
|
target.y = find_nether_target_y(target.x, target.z)
|
|
end
|
|
|
|
local dmin, dmax, ymin, ymax = 0, FRAME_SIZE_X_MIN - 1, p1.y, p2.y
|
|
for d = dmin, dmax do
|
|
for y = ymin, ymax do
|
|
if not ((d == dmin or d == dmax) and (y == ymin or y == ymax)) then
|
|
local p
|
|
if param2 == 0 then
|
|
p = {x = p1.x + d, y = y, z = p1.z}
|
|
else
|
|
p = {x = p1.x, y = y, z = p1.z + d}
|
|
end
|
|
if minetest.get_node(p).name == "air" then
|
|
minetest.set_node(p, {name = "mcl_portals:portal", param2 = param2})
|
|
end
|
|
local meta = minetest.get_meta(p)
|
|
|
|
-- Portal frame corners
|
|
meta:set_string("portal_frame1", minetest.pos_to_string(p1))
|
|
meta:set_string("portal_frame2", minetest.pos_to_string(p2))
|
|
|
|
-- Portal target coordinates
|
|
meta:set_string("portal_target", minetest.pos_to_string(target))
|
|
end
|
|
end
|
|
end
|
|
|
|
return true
|
|
end
|
|
|
|
|
|
minetest.register_abm({
|
|
label = "Nether portal teleportation and particles",
|
|
nodenames = {"mcl_portals:portal"},
|
|
interval = 1,
|
|
chance = 2,
|
|
action = function(pos, node)
|
|
minetest.add_particlespawner(
|
|
32, --amount
|
|
4, --time
|
|
{x = pos.x - 0.25, y = pos.y - 0.25, z = pos.z - 0.25}, --minpos
|
|
{x = pos.x + 0.25, y = pos.y + 0.25, z = pos.z + 0.25}, --maxpos
|
|
{x = -0.8, y = -0.8, z = -0.8}, --minvel
|
|
{x = 0.8, y = 0.8, z = 0.8}, --maxvel
|
|
{x = 0, y = 0, z = 0}, --minacc
|
|
{x = 0, y = 0, z = 0}, --maxacc
|
|
0.5, --minexptime
|
|
1, --maxexptime
|
|
1, --minsize
|
|
2, --maxsize
|
|
false, --collisiondetection
|
|
"mcl_portals_particle.png" --texture
|
|
)
|
|
for _,obj in ipairs(minetest.get_objects_inside_radius(pos,1)) do --maikerumine added for objects to travel
|
|
local lua_entity = obj:get_luaentity() --maikerumine added for objects to travel
|
|
if obj:is_player() or lua_entity then
|
|
-- Prevent quick back-and-forth teleportation
|
|
if portal_cooloff[obj] then
|
|
return
|
|
end
|
|
local meta = minetest.get_meta(pos)
|
|
local target = minetest.string_to_pos(meta:get_string("portal_target"))
|
|
if target then
|
|
-- force emerge of target area
|
|
minetest.get_voxel_manip():read_from_map(target, target)
|
|
if not minetest.get_node_or_nil(target) then
|
|
minetest.emerge_area(
|
|
vector.subtract(target, 4), vector.add(target, 4))
|
|
end
|
|
-- teleport the object
|
|
minetest.after(3, function(obj, pos, target)
|
|
-- Prevent quick back-and-forth teleportation
|
|
if portal_cooloff[obj] then
|
|
return
|
|
end
|
|
local objpos = obj:getpos()
|
|
if objpos == nil then
|
|
return
|
|
end
|
|
-- If player stands, player is at ca. something+0.5
|
|
-- which might cause precision problems, so we used ceil.
|
|
objpos.y = math.ceil(objpos.y)
|
|
|
|
if minetest.get_node(objpos).name ~= "mcl_portals:portal" then
|
|
return
|
|
end
|
|
|
|
-- Build target portal
|
|
local function check_and_build_portal(pos, target, is_rebuilding)
|
|
-- FIXME: This is a horrible hack and a desparate attempt to make sure
|
|
-- the portal has *really* been placed. Replace this hack!
|
|
local n = minetest.get_node_or_nil(target)
|
|
if n and n.name ~= "mcl_portals:portal" then
|
|
build_portal(target, pos, is_rebuilding)
|
|
is_rebuilding = true
|
|
minetest.after(2, check_and_build_portal, pos, target, is_rebuilding)
|
|
elseif not n then
|
|
is_rebuilding = true
|
|
minetest.after(1, check_and_build_portal, pos, target, is_rebuilding)
|
|
end
|
|
end
|
|
|
|
check_and_build_portal(pos, target, false)
|
|
|
|
-- Teleport
|
|
obj:setpos(target)
|
|
minetest.sound_play("mcl_portals_teleport", {pos=target, gain=0.5, max_hear_distance = 16})
|
|
|
|
-- Enable teleportation cooloff for 4 seconds, to prevent back-and-forth teleportation
|
|
portal_cooloff[obj] = true
|
|
minetest.after(4, function(o)
|
|
portal_cooloff[o] = false
|
|
end, obj)
|
|
|
|
end, obj, pos, target)
|
|
end
|
|
end
|
|
end
|
|
end,
|
|
})
|
|
|
|
|
|
--[[ ITEM OVERRIDES ]]
|
|
|
|
local longdesc = minetest.registered_nodes["mcl_core:obsidian"]._doc_items_longdesc
|
|
longdesc = longdesc .. "\n" .. "Obsidian is also used as the frame of Nether portals."
|
|
local usagehelp = "To open a Nether portal, place an upright frame of obsidian with a width of 4 blocks and a height of 5 blocks, leaving only air in the center. After placing this frame, ignite the obsidian with an appropriate tool, such as flint of steel."
|
|
|
|
minetest.override_item("mcl_core:obsidian", {
|
|
_doc_items_longdesc = longdesc,
|
|
_doc_items_usagehelp = usagehelp,
|
|
on_destruct = destroy_portal,
|
|
_on_ignite = function(user, pointed_thing)
|
|
local pos = pointed_thing.under
|
|
local portal_placed = make_portal(pos)
|
|
if portal_placed and minetest.get_modpath("doc") then
|
|
doc.mark_entry_as_revealed(user:get_player_name(), "nodes", "mcl_portals:portal")
|
|
else
|
|
local node = minetest.get_node(pointed_thing.above)
|
|
if node.name ~= "mcl_portals:portal" then
|
|
mcl_fire.set_fire(pointed_thing)
|
|
end
|
|
end
|
|
end,
|
|
})
|
|
|