From 30b950c77ad6edab9969cf744419d5bdb3c3a09d Mon Sep 17 00:00:00 2001
From: "Tai @ Flex" <dch.tai@gmail.com>
Date: Fri, 13 Jan 2017 16:07:17 +0000
Subject: [PATCH] randomized spawns if no fixed spawn defined

---
 init.lua | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 78 insertions(+), 9 deletions(-)

diff --git a/init.lua b/init.lua
index 9a0a81a..2894048 100644
--- a/init.lua
+++ b/init.lua
@@ -1,13 +1,82 @@
 local spawn_point = minetest.setting_get_pos("static_spawnpoint")
 
-if spawn_point then
-	minetest.register_privilege("spawn", "Can teleport to spawn position.")
-	minetest.register_chatcommand("spawn", {
-		description = "Teleport to spawn position.",
-		params = "",
-		privs = "spawn",
-		func = function(name)
-			minetest.get_player_by_name(name):setpos(spawn_point)
+local playerspawns = {}
+
+local function newspawn(radius)
+	if not radius then
+		radius = 32
+	end
+	if radius > 200 then
+		minetest.debug("No valid spawnable location")
+		return
+	end
+	minetest.debug("Re-spawn: Trying radius "..tostring(radius))
+
+	local pos1 = {x=-radius, y=0, z=-radius}
+	local pos2 = {x=radius, y=radius/2, z=radius}
+
+	local airnodes = minetest.find_nodes_in_area(pos1, pos2, {"air"})
+	local validnodes = {}
+
+	for _,anode in pairs(airnodes) do
+		local under = minetest.get_node( {x=anode.x, y=anode.y-1, z=anode.z} ).name
+		local over = minetest.get_node( {x=anode.x, y=anode.y+1, z=anode.z} ).name
+		under = minetest.registered_nodes[under]
+		over = minetest.registered_nodes[over]
+
+		
+		if under.walkable and not over.walkable then
+			validnodes[#validnodes+1] = anode
 		end
-	})
+	end
+
+	if #validnodes > 0 then
+		return validnodes[math.random(1,#validnodes)]
+	end
+
+	return newspawn(radius+32)
 end
+
+minetest.register_privilege("spawn", "Can teleport to spawn position.")
+
+minetest.register_chatcommand("spawn", {
+	description = "Teleport to spawn position.",
+	params = "",
+	privs = "spawn",
+	func = function(name)
+		local target = spawn_point
+		if not target then
+			target = playerspawns[name]
+		end
+		if not target then
+			playerspawns[name] = newspawn()
+			target = playerspawns[name]
+		end
+		minetest.get_player_by_name(name):setpos(target)
+	end
+})
+
+minetest.register_privilege("respawn", "Can get a new randomized spawn position.")
+
+minetest.register_chatcommand("respawn", {
+	description = "Randomly select a new spawn position.",
+	params = "",
+	privs = "respawn",
+	func = function(name)
+		playerspawns[name] = newspawn()
+	end
+})
+
+minetest.register_on_newplayer(function(player)
+	minetest.after(1,function()
+		playerspawns[player:get_player_name()] = player:getpos()
+	end)
+end)
+
+minetest.register_on_joinplayer(function(player)
+	minetest.after(1, function()
+		if not playerspawns[player:get_player_name()] then
+			playerspawns[player:get_player_name()] = newspawn()
+		end
+	end)
+end)