Check for distance

README

@@ -1,2 +1,7 @@
 License of checkpoint_teleporter.png:
 CC-BY-SA 3.0 UNPORTED. Created by Dragonop
+
+License of checkpoint_checkpoint.ogg:
+CC BY-NC 3.0. Created by Robinhood76
+Original filename: 334914__robinhood76__06304-message-ding-1.wav
+Source: www.freesound.org/people/Robinhood76/sounds/334914/

init.lua

@@ -1,27 +1,39 @@
 local players = {}
 
+local function vdistance(a, b)
+	local x, y, z = a.x - b.x, a.y - b.y, a.z - b.z
+	return x*x + y*y + z*z
+end
+
+local function set_checkpoint(player, pos)
+	local name = player:get_player_name()
+	local ppos = player:getpos()
+	
+	--print(tostring(vdistance(pos, ppos)))
+	if vdistance(pos, ppos) <= 10 then
+		players[name] = ppos
+		minetest.sound_play({name="checkpoint_checkpoint", gain=0.75},
+				{to_player=name})
+		minetest.chat_send_player(name, "Checkpoint saved")
+	else
+		minetest.chat_send_player(name, "Out of range!")
+	end
+end
+
 minetest.register_node("checkpoint:checkpoint", {
 	description = "Checkpoint",
-	--[[
-	tiles =	{"default_dirt.png^checkpoint_teleporter.png",
-		"default_wood.png^checkpoint_teleporter.png",
-		"default_steel_block.png^checkpoint_teleporter.png",
-		"default_gold_block.png^checkpoint_teleporter.png",
-		"default_mese_block.png^checkpoint_teleporter.png",
-		"default_diamond_block.png^checkpoint_teleporter.png"},
-	--]]
 	tiles = {"checkpoint_teleporter.png"},
+	inventory_image = "checkpoint_teleporter.png",
 	drawtype = "plantlike",
 	sunlight_propagates = true,
 	light_source = 8,
 	paramtype = "light",
-	--paramtype2 = "facedir",
-	groups = {cracky=1, choppy=1, crumbly=1, snappy=1},
-	on_rightclick = function(pos, node, clicker)
-		local name = clicker:get_player_name()
-		players[name] = clicker:getpos()
-
-		minetest.chat_send_player(name, "Checkpoint saved")
+	groups = {cracky = 1, choppy = 1, crumbly = 1, snappy = 1},
+	on_rightclick = function(pos, _, clicker)
+		set_checkpoint(clicker, pos)
+	end,
+	on_punch = function(pos, _, puncher)
+		set_checkpoint(puncher, pos)
 	end
 })
 
@@ -40,6 +52,7 @@ minetest.register_craftitem("checkpoint:teleporter", {
 })
 
 minetest.register_chatcommand("checkpoint", {
+	description = "Restore saved checkpoint",
 	func = function(name, param)
 		local pos = players[name]
 		if pos then
@@ -49,7 +62,10 @@ minetest.register_chatcommand("checkpoint", {
 			minetest.chat_send_player(name, "No checkpoint saved")
 			--return "No checkpoint saved"
 		end
-
-		--print(dump(players))
 	end
 })
+
+minetest.register_on_leaveplayer(function(player)
+	local name = player:get_player_name()
+	players[name] = nil
+end)