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MineClone2/mods/MAPGEN/mcl_portals/portal_nether.lua

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-- Parameters
local TCAVE = 0.6
local nobj_cave = nil
-- 3D noise
local np_cave = {
offset = 0,
scale = 1,
spread = {x = 384, y = 128, z = 384},
seed = 59033,
octaves = 5,
persist = 0.7
}
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-- 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)
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local p1 = minetest.string_to_pos(meta:get_string("portal_frame1"))
local p2 = minetest.string_to_pos(meta:get_string("portal_frame2"))
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if not p1 or not p2 then
return
end
local first = true
-- p1 metadata of first node
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 first then
--[[ Only proceed if the first node still has metadata.
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. ]]
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mp1 = minetest.string_to_pos(m:get_string("portal_frame1"))
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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
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m:set_string("portal_frame1", "")
m:set_string("portal_frame2", "")
m:set_string("portal_target", "")
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end
first = false
end
end
end
end
minetest.register_node("mcl_portals:portal", {
description = "Nether Portal",
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},
},
},
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groups = {not_in_creative_inventory = 1},
on_destruct = destroy_portal,
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_mcl_hardness = -1,
_mcl_blast_resistance = 0,
})
-- Functions
--Build arrival portal
local function build_portal(pos, target)
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, 4 do
minetest.set_node(p, {name = "mcl_core:obsidian"})
p.y = p.y + 1
end
for i = 1, 3 do
minetest.set_node(p, {name = "mcl_core:obsidian"})
p.x = p.x + 1
end
for i = 1, 4 do
minetest.set_node(p, {name = "mcl_core:obsidian"})
p.y = p.y - 1
end
for i = 1, 3 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 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)
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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))
if y ~= p1.y 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)
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local start_y = mcl_vars.mg_nether_min + math.random(38, 117) -- Search start
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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
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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.abs(max - p1[dir]) / (max - p1[dir])
while p[dir] ~= max do
p[dir] = p[dir] + d
if minetest.get_node(p).name ~= "mcl_core:obsidian" then
return false
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)
for d = -3, 3 do
for y = -4, 4 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 + 3, y = px.y + 4, z = px.z}) then
return px, {x = px.x + 3, y = px.y + 4, z = px.z}
end
if check_portal(pz, {x = pz.x, y = pz.y + 4, z = pz.z + 3}) then
return pz, {x = pz.x, y = pz.y + 4, z = pz.z + 3}
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
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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
for d = 0, 3 do
for y = p1.y, p2.y do
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)
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-- 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
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
local meta = minetest.get_meta(pos)
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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 player
minetest.after(3, function(obj, pos, target)
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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
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-- Build target portal
local function check_and_build_portal(pos, target)
local n = minetest.get_node_or_nil(target)
if n and n.name ~= "mcl_portals:portal" then
build_portal(target, pos)
minetest.after(2, check_and_build_portal, pos, target)
elseif not n then
minetest.after(1, check_and_build_portal, pos, target)
end
end
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check_and_build_portal(pos, target)
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-- Teleport
obj:setpos(target)
minetest.sound_play("mcl_portals_teleport", {pos=target, gain=0.5, max_hear_distance = 16})
end, obj, pos, target)
end
end
end
end,
})
--[[ ITEM OVERRIDES ]]
-- Frame material
minetest.override_item("mcl_core:obsidian", {
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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,
})