radio area spawn automatic detection feature, with reposition player if fails

* define spawn area from settings
* autodetect limit of world and limit the radio spawn area to this
* if radious area is big limit to almost the border
* if radious area is small limit to almost 600
* disable if radio is too small or less than 3

README.md

@@ -15,7 +15,7 @@ no matter what rules.
 ## Technical info
 -------------
 
-This mod has an improved way to do not hand server if no valild spawn point 
+This mod has an improved way to do not hang server if no valild spawn point 
 is found in some minutes.. cos all spawn managers in minetest causes problems 
 when players joins.
 
@@ -36,6 +36,14 @@ or taidkez's rspawn original work.
 It will send a chat notificatin private message to the player about new spawn position, 
 is configurable with `spawnrand.notification_position` boolean value with defaults as `true`.
 
+The spawn area will have a radious almost to the limit (but not the), from center of world, 
+is configurable with `spawnrand.radius_area` integer value with defaults as `20000`.
+
+#### performance
+
+If your server has huge users, you must increase the spawn area, but not so much, people 
+will just be repositioned at new position event define a new spawn if fails, so performance 
+will be not an issue if no a valid spawn point will found.
 
 License
 ------

init.lua

@@ -13,12 +13,38 @@ if beds == nil then
     bed_respawn = false
 end
 
+-- enalbe random only if radio are enought in game
+local enable_rand = true
+
+-- send notification to players only if enabled
 local notice_pos = minetest.settings:get_bool("spawnrand.notification_position") or true
 
+-- detect limits of maps to do not spawn close to borders
+local mapgen_limit = tonumber(minetest.settings:get("mapgen_limit")) or 30000
+
+-- set the radio of the spawn area to search
+local radius_area = tonumber(minetest.settings:get("spawnrand.radius_area")) or math.abs(mapgen_limit)
+
+-- now autodetection of the area and limits
+radius_area = math.abs(radius_area)
+
+if ( radius_area >= mapgen_limit ) then
+    radius_area = mapgen_limit -- too big or invalid
+end
+if ( radius_area < 100 ) then
+    radius_area = 300  -- too small will hit performance in big servers
+end
+if ( radius_area >= 20000 ) then
+    radius_area = radius_area - mapgen_limit * 0.2 -- avoid borders
+end
+if ( radius_area < 3 ) then
+    enable_rand = false -- this area is nonsense disable then
+end
+
 -- spawnrand function invocation, it uses internat "find_ground" to fid valid position from initial one
 function spawnrand(player)
    local elevation = 20
-   local radius = 600
+   local radius = ratio_area
    local posx = math.random(-radius, radius)
    local posz = math.random(-radius, radius)
    local new_spawn = {x = -174 + posx, y = elevation, z = 178 + posz}
@@ -98,16 +124,19 @@ minetest.register_node('spawnrand:node', {
    paramtype = 'light',
    light_source = 10,
    on_punch = function(pos, node, player)
+      if not enable_rand then
+            minetest.chat_send_player(player:get_player_name( ), "WARNING radio is 1, current position : ".. pos.x ..","..pos.y..","..pos.z )
+      end
       spawnrand(player)
    end
 })
 
 
--- newspam in new player join
+-- newspam in new player join, if radio 1 disable rand due performance, new players do not have bed rest yet
 minetest.register_on_newplayer(function(player)
 
     local pos
-    if player ~= nil then
+    if player ~= nil and enable_rand then
         pos = player:getpos()
         if notice_pos then 
             minetest.chat_send_player(player:get_player_name( ), "...awaiting new spawn from : ".. pos.x ..","..pos.y..","..pos.z )
@@ -122,7 +151,7 @@ minetest.register_on_respawnplayer(function(player)
 
     local name, pos
 
-    if player ~= nil then
+    if player ~= nil and enable_rand then
         name = player:get_player_name()
         pos = player:getpos()
         if notice_pos then 

mod.conf

@@ -1,4 +1,5 @@
 name = spawnrand
+title = minetest-mod-spawnrand
 depends =
 optional_depends = beds
 description = SPAWN random on each respawn of player

settingtypes.txt

@@ -1,2 +1,5 @@
 #    will send a chat notificatin private message to the player about new spawn position
-spawnrand.notification_position (Send a private notification about new pos to player) bool true
+spawnrand.notification_position (Send a private notification about new pos to player, can be set in game) bool true
+
+#    radious spawn area to randomlly put the positon, by default only 600 nodes from center
+spawnrand.radius_area (Ratio area from center to find a spawn position, cannot set in game, must be set before run) int 20000