112 lines
2.8 KiB
Lua
112 lines
2.8 KiB
Lua
--[[
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Hyperloop Mod
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=============
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Copyright (C) 2017-2019 Joachim Stolberg
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LGPLv2.1+
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See LICENSE.txt for more information
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Some common used helper functions
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]]--
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local PI = 3.1415926
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-- for lazy programmers
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local SP = function(pos) if pos then return minetest.pos_to_string(pos) end end
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local P = minetest.string_to_pos
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local M = minetest.get_meta
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local Stations = hyperloop.Stations
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function hyperloop.chat(player, text)
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if type(player) == "string" then
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minetest.chat_send_player(player, "[Hyperloop] "..text)
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elseif player ~= nil then
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minetest.chat_send_player(player:get_player_name(), "[Hyperloop] "..text)
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end
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end
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function hyperloop.get_facedir(placer)
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local lookdir = placer:get_look_dir()
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return core.dir_to_facedir(lookdir)
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end
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function hyperloop.facedir_to_rad(facedir)
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local tbl = {[0]=0, [1]=3, [2]=2, [3]=1}
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return tbl[facedir] / 2 * PI
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end
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-- Distance between two points in (tube) blocks
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function hyperloop.distance(pos1, pos2)
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return math.floor(math.abs(pos1.x - pos2.x) +
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math.abs(pos1.y - pos2.y) + math.abs(pos1.z - pos2.z))
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end
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-- calculate the new pos based on the given pos, the players facedir, the y-offset
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-- and the given walk path like "3F2L" (F-orward, L-eft, R-ight, B-ack).
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function hyperloop.new_pos(pos, facedir, path, y_offs)
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if facedir == nil or pos == nil or path == nil or y_offs == nil then
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return pos
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end
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local _pos = table.copy(pos)
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_pos.y = _pos.y + y_offs
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while path:len() > 0 do
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local num = tonumber(path:sub(1,1))
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local dir = path:sub(2,2)
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path = path:sub(3)
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if dir == "B" then
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facedir = (facedir + 2) % 4
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elseif dir == "L" then
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facedir = (facedir + 3) % 4
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elseif dir == "R" then
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facedir = (facedir + 1) % 4
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end
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dir = core.facedir_to_dir(facedir)
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_pos = vector.add(_pos, vector.multiply(dir, num))
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end
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return _pos
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end
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function hyperloop.is_player_around(pos)
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for _,obj in ipairs(minetest.get_objects_inside_radius(pos, 2)) do
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if obj:is_player() then
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return true
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end
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end
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return false
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end
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function hyperloop.get_connection_string(pos)
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local item = Stations:get(pos)
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if item then
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local tbl = {}
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for k,v in pairs(item.conn) do
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tbl[#tbl+1] = v
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end
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return table.concat(tbl, " ")
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end
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return ""
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end
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function hyperloop.get_station(station_pos)
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local data = Stations:get(station_pos)
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if data then
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local tStation = table.copy(data)
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tStation.pos = station_pos
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return tStation
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end
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end
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-- Return a copy of the station table including the station pos information
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-- based on the given seat/booking/lcd position (the station position
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-- is determined via meta "sStationPos").
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function hyperloop.get_base_station(pos)
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local meta = M(pos)
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local sStationPos = meta:get_string("sStationPos")
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if sStationPos ~= "" then
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local station_pos = P(sStationPos)
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return hyperloop.get_station(station_pos), station_pos
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end
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end
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