fast walking at the center + radius of 250 blocks

fixes https://github.com/damocles-minetest/damocles.minetest.land/issues/10

.luacheckrc

@@ -17,5 +17,6 @@ read_globals = {
 	"default",
 	"stairsplus",
 	"player_monoids",
-	"epic"
+	"epic",
+	"player_monoids"
 }

center_fast_walk.lua

@@ -0,0 +1,36 @@
+
+
+local player_map = {} -- playername => boolean
+
+minetest.register_on_leaveplayer(function(player)
+	player_map[player:get_player_name()] = nil
+end)
+
+local timer = 0
+minetest.register_globalstep(function(dtime)
+	timer = timer + dtime
+	if timer < 1 then
+		return
+	end
+
+	timer = 0
+
+	for _, player in ipairs(minetest.get_connected_players()) do
+		local playername = player:get_player_name()
+		local ppos = player:get_pos()
+
+		local is_in_center = vector.distance({x=0, y=0, z=0}, ppos) < 250
+
+		if is_in_center and not player_map[playername] then
+			-- moved to the center
+			player_monoids.speed:add_change(player, 2, "center_fast")
+			player_map[playername] = true
+		elseif not is_in_center and player_map[playername] then
+			-- moved out of the center
+			player_monoids.speed:del_change(player, "center_fast")
+			player_map[playername] = nil
+		end
+	end
+
+
+end)

init.lua

@@ -23,6 +23,10 @@ if minetest.get_modpath("epic_skybox") then
 	dofile(MP.."/skybox.lua")
 end
 
+if minetest.get_modpath("player_monoids") then
+	dofile(MP.."/center_fast_walk.lua")
+end
+
 if minetest.settings:get_bool("enable_integration_test") then
 	dofile(MP.."/integration_test.lua")
 end

mod.conf

@@ -1,3 +1,3 @@
 name = damocles_custom
 depends = default
-optional_depends = moreblocks,travelnet,epic_skybox
+optional_depends = moreblocks,travelnet,epic_skybox,player_monoids