mirror of
https://git.minetest.land/VoxeLibre/VoxeLibre.git
synced 2024-12-23 08:29:34 +01:00
440 lines
12 KiB
Lua
440 lines
12 KiB
Lua
-- Parameters
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local TCAVE = 0.6
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local nobj_cave = nil
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-- 3D noise
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local np_cave = {
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offset = 0,
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scale = 1,
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spread = {x = 384, y = 128, z = 384}, -- squashed 3:1
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seed = 59033,
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octaves = 5,
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persist = 0.7
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}
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-- Portal frame material
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local portal_frame = "mcl_nether:quartz_block"
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-- Table of objects (including players) which recently teleported by a
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-- End portal. Those objects have a brief cooloff period before they
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-- can teleport again. This prevents annoying back-and-forth teleportation.
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local portal_cooloff = {}
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-- Destroy portal if pos (portal frame or portal node) got destroyed
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local destroy_portal = function(pos)
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-- Deactivate Nether portal
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local meta = minetest.get_meta(pos)
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local p1 = minetest.string_to_pos(meta:get_string("portal_frame1"))
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local p2 = minetest.string_to_pos(meta:get_string("portal_frame2"))
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if not p1 or not p2 then
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return
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end
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local first = true
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-- p1 metadata of first node
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local mp1
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for x = p1.x, p2.x do
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for y = p1.y, p2.y do
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for z = p1.z, p2.z do
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local p = vector.new(x, y, z)
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local m = minetest.get_meta(p)
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if first then
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--[[ Only proceed if the first node still has metadata.
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If it doesn't have metadata, another node propably triggred the delection
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routine earlier, so we bail out earlier to avoid an infinite cascade
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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
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return
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end
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end
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local nn = minetest.get_node(p).name
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if nn == portal_frame or nn == "mcl_portals:portal_end" then
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-- Remove portal nodes, but not myself
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if nn == "mcl_portals:portal_end" and not vector.equals(p, pos) then
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minetest.remove_node(p)
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end
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-- Clear metadata of portal nodes and the frame
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m:set_string("portal_frame1", "")
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m:set_string("portal_frame2", "")
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m:set_string("portal_target", "")
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end
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first = false
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end
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end
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end
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end
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-- Nodes
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minetest.register_node("mcl_portals:portal_end", {
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description = "End Portal",
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_doc_items_longdesc = "An End portal teleports creatures and objects to the mysterious End dimension (and back!).",
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_doc_items_usagehelp = "Stand in the portal for a moment to activate the teleportation. Entering such a portal for the first time will create a new portal in your destination. End portal which were built in the End will lead back to the Overworld. An End portal is destroyed if any of its surrounding frame blocks is destroyed.",
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tiles = {
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"blank.png",
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"blank.png",
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"blank.png",
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"blank.png",
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{
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name = "mcl_portals_end_portal.png",
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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aspect_h = 16,
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length = 2.0,
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},
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},
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{
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name = "mcl_portals_end_portal.png",
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animation = {
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type = "vertical_frames",
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aspect_w = 16,
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aspect_h = 16,
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length = 2.0,
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},
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},
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},
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drawtype = "nodebox",
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paramtype = "light",
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paramtype2 = "facedir",
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sunlight_propagates = true,
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use_texture_alpha = true,
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walkable = false,
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diggable = false,
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pointable = false,
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buildable_to = false,
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is_ground_content = false,
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drop = "",
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-- This is 15 in MC.
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light_source = 14,
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post_effect_color = {a = 192, r = 0, g = 0, b = 0},
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alpha = 192,
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node_box = {
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type = "fixed",
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fixed = {
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{-0.5, -0.5, -0.1, 0.5, 0.5, 0.1},
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},
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},
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groups = {not_in_creative_inventory = 1},
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on_destruct = destroy_portal,
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_mcl_hardness = -1,
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_mcl_blast_resistance = 18000000,
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})
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local function build_end_portal(pos, target3)
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local p = {x = pos.x - 1, y = pos.y - 1, z = pos.z}
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local p1 = {x = pos.x - 1, y = pos.y - 1, z = pos.z}
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local p2 = {x = p1.x + 3, y = p1.y + 4, z = p1.z}
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for i = 1, 4 do
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minetest.set_node(p, {name = portal_frame})
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p.y = p.y + 1
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end
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for i = 1, 3 do
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minetest.set_node(p, {name = portal_frame})
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p.x = p.x + 1
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end
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for i = 1, 4 do
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minetest.set_node(p, {name = portal_frame})
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p.y = p.y - 1
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end
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for i = 1, 3 do
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minetest.set_node(p, {name = portal_frame})
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p.x = p.x - 1
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end
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for x = p1.x, p2.x do
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for y = p1.y, p2.y do
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p = {x = x, y = y, z = p1.z}
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if not (x == p1.x or x == p2.x or y == p1.y or y == p2.y) then
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minetest.set_node(p, {name = "mcl_portals:portal_end", param2 = 0})
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end
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local meta = minetest.get_meta(p)
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meta:set_string("portal_frame1", minetest.pos_to_string(p1))
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meta:set_string("portal_frame2", minetest.pos_to_string(p2))
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meta:set_string("portal_target", minetest.pos_to_string(target3))
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if y ~= p1.y then
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for z = -2, 2 do
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if z ~= 0 then
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p.z = p.z + z
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if minetest.registered_nodes[
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minetest.get_node(p).name].is_ground_content then
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minetest.remove_node(p)
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end
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p.z = p.z - z
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end
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end
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end
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end
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end
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end
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local function find_end_target3_y2(target3_x, target3_z)
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local start_y = mcl_vars.mg_end_min + math.random(20, 120) -- Search start
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if not nobj_cave then
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nobj_cave = minetest.get_perlin(np_cave)
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end
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local air = 0 -- Consecutive air nodes found
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for y = start_y, start_y - 120, -1 do
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local nval_cave = nobj_cave:get3d({x = target3_x, y = y, z = target3_z})
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if nval_cave > TCAVE then -- Cavern
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air = air + 1
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else -- Not cavern, check if 4 nodes of space above
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if air >= 4 then
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return y + 2
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else -- Not enough space, reset air to zero
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air = 0
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end
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end
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end
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return start_y -- Fallback
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end
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local function move_check2(p1, max, dir)
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local p = {x = p1.x, y = p1.y, z = p1.z}
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local d = math.abs(max - p1[dir]) / (max - p1[dir])
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while p[dir] ~= max do
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p[dir] = p[dir] + d
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if minetest.get_node(p).name ~= portal_frame then
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return false
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end
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-- Abort if any of the portal frame blocks already has metadata.
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-- This mod does not yet portals which neighbor each other directly.
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-- TODO: Reorganize the way how portal frame coordinates are stored.
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local meta = minetest.get_meta(p)
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local p1 = meta:get_string("portal_frame1")
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if minetest.string_to_pos(p1) ~= nil then
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return false
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end
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end
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return true
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end
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local function check_end_portal(p1, p2)
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if p1.x ~= p2.x then
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if not move_check2(p1, p2.x, "x") then
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return false
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end
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if not move_check2(p2, p1.x, "x") then
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return false
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end
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elseif p1.z ~= p2.z then
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if not move_check2(p1, p2.z, "z") then
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return false
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end
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if not move_check2(p2, p1.z, "z") then
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return false
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end
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else
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return false
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end
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if not move_check2(p1, p2.y, "y") then
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return false
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end
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if not move_check2(p2, p1.y, "y") then
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return false
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end
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return true
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end
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local function is_end_portal(pos)
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for d = -3, 3 do
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for y = -4, 4 do
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local px = {x = pos.x + d, y = pos.y + y, z = pos.z}
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local pz = {x = pos.x, y = pos.y + y, z = pos.z + d}
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if check_end_portal(px, {x = px.x + 3, y = px.y + 4, z = px.z}) then
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return px, {x = px.x + 3, y = px.y + 4, z = px.z}
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end
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if check_end_portal(pz, {x = pz.x, y = pz.y + 4, z = pz.z + 3}) then
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return pz, {x = pz.x, y = pz.y + 4, z = pz.z + 3}
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end
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end
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end
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end
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local function make_end_portal(pos)
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local p1, p2 = is_end_portal(pos)
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if not p1 or not p2 then
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return false
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end
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for d = 1, 2 do
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for y = p1.y + 1, p2.y - 1 do
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local p
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if p1.z == p2.z then
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p = {x = p1.x + d, y = y, z = p1.z}
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else
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p = {x = p1.x, y = y, z = p1.z + d}
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end
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if minetest.get_node(p).name ~= "air" then
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return false
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end
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end
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end
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local param2
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if p1.z == p2.z then
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param2 = 0
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else
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param2 = 1
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end
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local target3 = {x = p1.x, y = p1.y, z = p1.z}
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target3.x = target3.x + 1
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if target3.y < mcl_vars.mg_end_max and target3.y > mcl_vars.mg_end_min then
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target3.y = math.random(mcl_vars.mg_overworld_min + 40, mcl_vars.mg_overworld_min + 96)
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else
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target3.y = find_end_target3_y2(target3.x, target3.z)
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end
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for d = 0, 3 do
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for y = p1.y, p2.y do
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local p = {}
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if param2 == 0 then
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p = {x = p1.x + d, y = y, z = p1.z}
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else
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p = {x = p1.x, y = y, z = p1.z + d}
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end
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if minetest.get_node(p).name == "air" then
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minetest.set_node(p, {name = "mcl_portals:portal_end", param2 = param2})
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end
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local meta = minetest.get_meta(p)
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-- Portal frame corners
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meta:set_string("portal_frame1", minetest.pos_to_string(p1))
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meta:set_string("portal_frame2", minetest.pos_to_string(p2))
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-- Portal target coordinates
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meta:set_string("portal_target", minetest.pos_to_string(target3))
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end
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end
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return true
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end
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minetest.register_abm({
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label = "End portal teleportation",
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nodenames = {"mcl_portals:portal_end"},
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interval = 1,
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chance = 2,
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action = function(pos, node)
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for _,obj in ipairs(minetest.get_objects_inside_radius(pos,1)) do --maikerumine added for objects to travel
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local lua_entity = obj:get_luaentity() --maikerumine added for objects to travel
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if obj:is_player() or lua_entity then
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-- No rapid back-and-forth teleportatio
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if portal_cooloff[obj] then
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return
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end
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local meta = minetest.get_meta(pos)
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local target3 = minetest.string_to_pos(meta:get_string("portal_target"))
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if target3 then
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-- force emerge of target3 area
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minetest.get_voxel_manip():read_from_map(target3, target3)
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if not minetest.get_node_or_nil(target3) then
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minetest.emerge_area(
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vector.subtract(target3, 4), vector.add(target3, 4))
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end
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-- teleport the object
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minetest.after(3, function(obj, pos, target3)
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-- No rapid back-and-forth teleportatio
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if portal_cooloff[obj] then
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return
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end
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local objpos = obj:getpos()
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if objpos == nil then
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return
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end
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-- If player stands, player is at ca. something+0.5
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-- which might cause precision problems, so we used ceil.
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objpos.y = math.ceil(objpos.y)
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if minetest.get_node(objpos).name ~= "mcl_portals:portal_end" then
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return
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end
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-- Build destination
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local function check_and_build_end_portal(pos, target3)
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local n = minetest.get_node_or_nil(target3)
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if n and n.name ~= "mcl_portals:portal_end" then
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build_end_portal(target3, pos)
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minetest.after(2, check_and_build_end_portal, pos, target3)
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elseif not n then
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minetest.after(1, check_and_build_end_portal, pos, target3)
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end
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end
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check_and_build_end_portal(pos, target3)
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-- Teleport
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obj:setpos(target3)
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minetest.sound_play("mcl_portals_teleport", {pos=target3, gain=0.5, max_hear_distance = 16})
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-- Enable teleportation cooloff to prevent frequent back-and-forth teleportation
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portal_cooloff[obj] = true
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minetest.after(3, function(o)
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portal_cooloff[o] = false
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end, obj)
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end, obj, pos, target3)
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end
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end
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end
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end,
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})
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--[[ ITEM OVERRIDES ]]
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local portal_open_help = "To open an End portal, place an upright frame of quartz blocks with a length of 4 blocks and a height of 5 blocks, leaving only air in the center. After placing this frame, use an eye of ender on the frame. The eye of ender is destroyed in the process."
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-- Frame material
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minetest.override_item(portal_frame, {
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_doc_items_longdesc = "A block of quartz can be used to create End portals.",
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_doc_items_usagehelp = portal_open_help,
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on_destruct = destroy_portal,
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})
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-- Portal opener
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minetest.override_item("mcl_end:ender_eye", {
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_doc_items_longdesc = "An eye of ender can be used to open End portals.",
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_doc_items_usagehelp = portal_open_help,
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on_place = function(itemstack, user, pointed_thing)
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-- Use pointed node's on_rightclick function first, if present
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local node = minetest.get_node(pointed_thing.under)
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if user and not user:get_player_control().sneak then
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if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
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return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, user, itemstack) or itemstack
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end
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end
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-- If used on portal frame, open a portal
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if pointed_thing.under and node.name == portal_frame then
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local opened = make_end_portal(pointed_thing.under)
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if opened then
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if minetest.get_modpath("doc") then
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doc.mark_entry_as_revealed(user:get_player_name(), "nodes", "mcl_portals:portal_end")
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end
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minetest.sound_play(
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"fire_flint_and_steel",
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{pos = pointed_thing.above, gain = 0.5, max_hear_distance = 16})
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if not minetest.settings:get_bool("creative_mode") then
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itemstack:take_item() -- 1 use
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end
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end
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end
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return itemstack
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end,
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})
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