Correct static_spawnpoint distance calculations

(I forgot, again, that Lua table/array asiggment is by reference)

depends.txt

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+default
+cursed_world?

description.txt

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+Adds a /spawn command that telepors you to the server spawn command.

init.lua

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+
+spawn_command = {}
+spawn_command.pos = {x=0, y=3, z=0}
+local cursed_world_exists = minetest.get_modpath("cursed_world")
+
+if minetest.setting_get_pos("static_spawnpoint") then
+    spawn_command.pos = minetest.setting_get_pos("static_spawnpoint")
+end
+
+function teleport_to_spawn(name)
+    local player = minetest.get_player_by_name(name)
+    if player == nil then
+        -- just a check to prevent the server crashing
+        return false
+    end
+    local pos = player:get_pos()
+    if math.abs(spawn_command.pos.x-pos.x)<20 and math.abs(spawn_command.pos.z-pos.z)<20 then
+        minetest.chat_send_player(name, "Already close to spawn!")
+    elseif cursed_world_exists and _G['cursed_world'] ~= nil and    --check global table for cursed_world mod
+        cursed_world.location_y and cursed_world.dimension_y and
+        pos.y < (cursed_world.location_y + cursed_world.dimension_y) and    --if player is in cursed world, stay in cursed world
+        pos.y > (cursed_world.location_y - cursed_world.dimension_y)
+    then   --check global table for cursed_world mod
+        --minetest.chat_send_player(name, "T"..(cursed_world.location_y + cursed_world.dimension_y).." "..(cursed_world.location_y - cursed_world.dimension_y))
+        local spawn_pos = vector.round(spawn_command.pos);
+        spawn_pos.y = spawn_pos.y + cursed_world.location_y;
+        player:set_pos(spawn_pos)
+        minetest.chat_send_player(name, "Teleported to spawn!")
+    else
+        player:set_pos(spawn_command.pos)
+        minetest.chat_send_player(name, "Teleported to spawn!")
+    end
+end
+
+minetest.register_chatcommand("spawn", {
+    description = "Teleport you to spawn point.",
+    func = teleport_to_spawn,
+})

mod.conf

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+name = spawn_command