techpack/tubelib/forceload.lua

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--[[
Tube Library
============
Copyright (C) 2017-2019 Joachim Stolberg
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LGPLv2.1+
See LICENSE.txt for more information
forceload.lua:
]]--
-- for lazy programmers
local S = function(pos) if pos then return minetest.pos_to_string(pos) end end
local P = minetest.string_to_pos
local M = minetest.get_meta
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local function calc_area(pos)
local xpos = (math.floor(pos.x / 16) * 16)
local ypos = (math.floor(pos.y / 16) * 16)
local zpos = (math.floor(pos.z / 16) * 16)
local pos1 = {x=xpos, y=ypos, z=zpos}
local pos2 = {x=xpos+15, y=ypos+15, z=zpos+15}
return pos1, pos2
end
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local function in_list(list, x)
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local pos1 = calc_area(x)
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for _,v in ipairs(list) do
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local pos2 = calc_area(v)
if vector.equals(pos1, pos2) then return true end
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end
return false
end
local function remove_list_elem(list, x)
local n = nil
for idx, v in ipairs(list) do
if vector.equals(v, x) then
n = idx
break
end
end
if n then
table.remove(list, n)
end
return list
end
local function chat(player, text)
minetest.chat_send_player(player:get_player_name(), "[Tubelib] "..text)
end
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local function get_node_lvm(pos)
local node = minetest.get_node_or_nil(pos)
if node then
return node
end
local vm = minetest.get_voxel_manip()
local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
local data = vm:get_data()
local param2_data = vm:get_param2_data()
local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
local idx = area:index(pos.x, pos.y, pos.z)
node = {
name = minetest.get_name_from_content_id(data[idx]),
param2 = param2_data[idx]
}
return node
end
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local function add_pos(pos, player)
local lPos = minetest.deserialize(player:get_attribute("tubelib_forceload_blocks")) or {}
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if not in_list(lPos, pos) and #lPos < tubelib.max_num_forceload_blocks then
lPos[#lPos+1] = pos
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player:set_attribute("tubelib_forceload_blocks", minetest.serialize(lPos))
return true
end
return false
end
local function del_pos(pos, player)
local lPos = minetest.deserialize(player:get_attribute("tubelib_forceload_blocks")) or {}
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lPos = remove_list_elem(lPos, pos)
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player:set_attribute("tubelib_forceload_blocks", minetest.serialize(lPos))
end
local function get_pos_list(player)
return minetest.deserialize(player:get_attribute("tubelib_forceload_blocks")) or {}
end
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local function set_pos_list(player, lPos)
player:set_attribute("tubelib_forceload_blocks", minetest.serialize(lPos))
end
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local function get_data(pos, player)
local pos1, pos2 = calc_area(pos)
local num = #minetest.deserialize(player:get_attribute("tubelib_forceload_blocks")) or 0
local max = tubelib.max_num_forceload_blocks
return pos1, pos2, num, max
end
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local function formspec(player)
local lPos = get_pos_list(player)
local tRes = {}
tRes[1] = "size[7,9]"..
default.gui_bg..
default.gui_bg_img..
default.gui_slots..
"label[0,0;List of your Forceload Blocks:]"
for idx,pos in ipairs(lPos) do
local pos1, pos2 = calc_area(pos)
local ypos = 0.2 + idx * 0.4
tRes[#tRes+1] = "label[0,"..ypos..";"..idx.."]"
tRes[#tRes+1] = "label[0.8,"..ypos..";"..S(pos1).."]"
tRes[#tRes+1] = "label[3.2,"..ypos..";to]"
tRes[#tRes+1] = "label[4,"..ypos..";"..S(pos2).."]"
end
return table.concat(tRes)
end
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minetest.register_node("tubelib:forceload", {
description = "Tubelib Forceload Block",
tiles = {
-- up, down, right, left, back, front
'tubelib_front.png',
'tubelib_front.png',
{
image = "tubelib_forceload.png",
backface_culling = false,
animation = {
type = "vertical_frames",
aspect_w = 32,
aspect_h = 32,
length = 0.5,
},
},
},
after_place_node = function(pos, placer, itemstack)
if add_pos(pos, placer) then
minetest.forceload_block(pos, true)
local pos1, pos2, num, max = get_data(pos, placer)
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M(pos):set_string("infotext", "Area "..S(pos1).." to "..S(pos2).." loaded!\n"..
"Punch the block to make the area visible.")
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chat(placer, "Area ("..num.."/"..max..") "..S(pos1).." to "..S(pos2).." loaded!")
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tubelib.mark_region(placer:get_player_name(), pos1, pos2)
M(pos):set_string("owner", placer:get_player_name())
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else
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chat(placer, "Area already loaded or max. number of Forceload Blocks reached!")
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minetest.remove_node(pos)
return itemstack
end
end,
after_dig_node = function(pos, oldnode, oldmetadata, digger)
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local player = minetest.get_player_by_name(oldmetadata.fields.owner)
del_pos(pos, player)
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minetest.forceload_free_block(pos, true)
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tubelib.unmark_region(oldmetadata.fields.owner)
end,
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on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
if M(pos):get_string("owner") == clicker:get_player_name() or
minetest.check_player_privs(clicker:get_player_name(), "server") then
local s = formspec(clicker)
minetest.show_formspec(clicker:get_player_name(), "tubelib:forceload", s)
end
end,
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on_punch = function(pos, node, puncher, pointed_thing)
local pos1, pos2 = calc_area(pos)
tubelib.switch_region(puncher:get_player_name(), pos1, pos2)
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end,
paramtype = "light",
sunlight_propagates = true,
groups = {choppy=2, cracky=2, crumbly=2,
not_in_creative_inventory = tubelib.max_num_forceload_blocks == 0 and 1 or 0},
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is_ground_content = false,
sounds = default.node_sound_wood_defaults(),
})
if tubelib.max_num_forceload_blocks > 0 then
minetest.register_craft({
output = "tubelib:forceload",
recipe = {
{"group:wood", "", "group:wood"},
{"", "basic_materials:energy_crystal_simple", ""},
{"group:wood", "tubelib:wlanchip", "group:wood"},
},
})
end
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minetest.register_on_joinplayer(function(player)
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local lPos = {}
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for _,pos in ipairs(get_pos_list(player)) do
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local node = get_node_lvm(pos)
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print("pos", S(pos), "name", node.name)
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if node.name == "tubelib:forceload" then
minetest.forceload_block(pos, true)
lPos[#lPos+1] = pos
end
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end
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set_pos_list(player, lPos)
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end)
minetest.register_on_leaveplayer(function(player)
for _,pos in ipairs(get_pos_list(player)) do
minetest.forceload_free_block(pos, true)
end
end)