Added physics_manager

mods/physics_manager/init.lua

@@ -0,0 +1,44 @@
+-- 0 is the lowest priority
+-- inf is the highest priority
+
+local player_physics_table = {}
+
+local function check_for_entry(pName)
+	if player_physics_table[pName] == nil then
+		local p = minetest.get_player_by_name(pName)
+		if p then
+			local pTable = p:get_physics_override()
+		else
+			local pTable = {speed = 1, jump = 1, gravity = 1, sneak = true, sneak_glitch = true, new_move = false}
+		end
+		player_physics_table[pName] = {default = {priority = 0, physics = pTable}}
+	end
+end
+
+local function update_physics(player)
+	local n = player:get_player_name()
+	local requests = player_physics_table[n].physics
+	local highestPriority = -1
+	local highest = nil
+	for id, pTable in pairs(requests) do
+		if pTable.priority > highestPriority then
+			highestPriority = pTable.priority
+			highest = pTable.physics
+		end
+	end
+	player:set_physics_override(highest)
+end
+
+function set_player_physics(player, phys, priority, id)
+	local pName = player:get_player_name()
+	check_for_entry(pName)
+	player_physics_table[pName][id] = {priority = priority, physics = phys}
+	update_physics(player)
+end
+
+function reset_player_physics(player, id)
+	local pName = player:get_player_name()
+	check_for_entry(pName)
+	player_physics_table[pName][id] = nil
+	update_physics(player)
+end