mirror of git://repo.or.cz/minetest_mana.git
282 lines
6.7 KiB
Lua
282 lines
6.7 KiB
Lua
--[[
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Mana 0.2.0
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This mod adds mana to players, a special attribute
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License: WTFPL
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]]
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--[===[
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Initialization
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]===]
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mana = {}
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mana.playerlist = {}
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--[===[
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API functions
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]===]
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--[[ Sets the mana reserves of the specified player
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It is ensured that the resulting value will always be within the bounds of [0, maxmana]
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]]
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function mana.set(playername, value)
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if value < 0 then
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minetest.log("info", "[mana] Warning: mana.set was called with negative value!")
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value = 0
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end
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if value > mana.playerlist[playername].maxmana then
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value = mana.playerlist[playername].maxmana
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end
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if mana.playerlist[playername].mana ~= value then
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mana.playerlist[playername].mana = value
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mana.hud_update(playername)
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end
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end
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--[[ Sets the maximum mana of the specified player. The value must be positive or 0.
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The player's mana reserves will be capped at the new maximum, if neccessary.
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]]
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function mana.setmax(playername, value)
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if value < 0 then
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value = 0
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minetest.log("info", "[mana] Warning: mana.setmax was called with negative value!")
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end
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if mana.playerlist[playername].maxmana ~= value then
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mana.playerlist[playername].maxmana = value
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if(mana.playerlist[playername].mana > value) then
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mana.playerlist[playername].mana = value
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end
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mana.hud_update(playername)
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end
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end
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-- Returns the current mana of the specified player
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function mana.get(playername)
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return mana.playerlist[playername].mana
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end
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-- Returns the maximum mana of the specified player
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function mana.getmax(playername)
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return mana.playerlist[playername].maxmana
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end
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--[[
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Adds up to the specified amount of mana to the player.
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If the sum would be greater than the maximum, the new
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mana amount will be capped at the maximum.
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returns:
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- true, excess on success, where excess is the amount of mana which
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was no
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- false on failure
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]]
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function mana.add_up_to(playername, value)
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local t = mana.playerlist[playername]
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if(t ~= nil and value >= 0) then
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local excess
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if((t.mana + value) > t.maxmana) then
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excess = (t.mana + value) - t.maxmana
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t.mana = t.maxmana
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else
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excess = 0
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t.mana = t.mana + value
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end
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mana.hud_update(playername)
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return true, excess
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else
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return false
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end
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end
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--[[
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Adds the specified amount of mana to the player,
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iff it would not exceed the maximum.
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returns:
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- true on success, all mana has been added
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- false on failure, no mana has been added
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]]
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function mana.add(playername, value)
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local t = mana.playerlist[playername]
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if(t ~= nil and ((t.mana + value) <= t.maxmana) and value >= 0) then
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t.mana = t.mana + value
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mana.hud_update(playername)
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return true
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else
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return false
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end
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end
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--[[
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Subtracts the specified amount of mana from the player,
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iff the player has enough mana reserves.
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returns:
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- true on success, all mana has been subtracted
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- false on failure, no mana has been subtracted
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]]
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function mana.subtract(playername, value)
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local t = mana.playerlist[playername]
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if(t ~= nil and t.mana >= value and value >= 0) then
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t.mana = t.mana -value
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mana.hud_update(playername)
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return true
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else
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return false
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end
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end
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--[[
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Subtracts up to the specified amount of mana from the player.
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returns:
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- true, missing on success, where missing is the amount of mana which could not been subtracted
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- false on failure, no mana has been subtracted
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]]
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function mana.subtract_up_to(playername, value)
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local t = mana.playerlist[playername]
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if(t ~= nil and value >= 0) then
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local missing
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if((t.mana - value) < 0) then
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missing = math.abs(t.mana - value)
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t.mana = 0
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else
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missing = 0
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t.mana = t.mana - value
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end
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mana.hud_update(playername)
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return true, missing
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else
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return false
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end
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end
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--[===[
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File handling, loading data, saving data, setting up stuff for players.
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]===]
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-- Load the playerlist from a previous session, if available.
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do
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local filepath = minetest.get_worldpath().."/mana.mt"
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local file = io.open(filepath, "r")
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if file then
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minetest.log("action", "[mana] mana.mt opened.")
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local string = file:read()
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io.close(file)
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if(string ~= nil) then
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local savetable = minetest.deserialize(string)
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mana.playerlist = savetable.playerlist
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minetest.debug("[mana] mana.mt successfully read.")
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end
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end
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end
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function mana.save_to_file()
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local savetable = {}
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savetable.playerlist = mana.playerlist
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local savestring = minetest.serialize(savetable)
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local filepath = minetest.get_worldpath().."/mana.mt"
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local file = io.open(filepath, "w")
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if file then
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file:write(savestring)
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io.close(file)
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minetest.log("action", "[mana] Wrote mana data into "..filepath..".")
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else
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minetest.log("error", "[mana] Failed to write mana data into "..filepath..".")
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end
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end
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minetest.register_on_dieplayer(function(player)
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local playername = player:get_player_name()
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mana.set(playername, 0)
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mana.hud_update(playername)
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end)
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minetest.register_on_leaveplayer(function(player)
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local playername = player:get_player_name()
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mana.hud_remove(playername)
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mana.playerlist[playername] = nil
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end)
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minetest.register_on_shutdown(function()
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minetest.log("action", "[mana] Server shuts down. Rescuing data into mana.mt")
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mana.save_to_file()
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end)
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minetest.register_on_joinplayer(function(player)
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local playername = player:get_player_name()
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if mana.playerlist[playername] == nil then
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mana.playerlist[playername] = {}
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mana.playerlist[playername].mana = 0
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mana.playerlist[playername].maxmana = 100
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end
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if minetest.get_modpath("hudbars") ~= nil then
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hud.hudtables.mana.add_all(player, mana.get(playername), mana.getmax(playername))
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else
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mana.hud_add(playername)
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end
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end)
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--[===[
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HUD functions
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]===]
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if minetest.get_modpath("hudbars") ~= nil then
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hud.register_hudbar("mana", 0xFFFFFF, "Mana", { bar = "mana_bar.png", icon = "mana_icon.png" }, 0, 100, false)
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function mana.hud_update(playername)
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local player = minetest.get_player_by_name(playername)
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hud.change_hudbar(player, hud.hudtables.mana, mana.get(playername), mana.getmax(playername))
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end
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else
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function mana.manastring(playername)
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return string.format("Mana: %d/%d", mana.get(playername), mana.getmax(playername))
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end
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function mana.hud_add(playername)
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local player = minetest.get_player_by_name(playername)
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id = player:hud_add({
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hud_elem_type = "text",
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position = { x = 0.5, y=0.9 },
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text = mana.manastring(playername),
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scale = { x = 0, y = 0 },
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alignment = { x = 1, y = 0},
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direction = 1,
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number = 0xFFFFFF,
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offset = { x = -200, y = 15}
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})
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mana.playerlist[playername].hudid = id
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return id
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end
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function mana.hud_update(playername)
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local player = minetest.get_player_by_name(playername)
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player:hud_change(mana.playerlist[playername].hudid, "number", mana.get(playername))
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end
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function mana.hud_remove(playername)
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local player = minetest.get_player_by_name(playername)
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player:hud_remove(mana.playerlist[playername].hudid)
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end
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end
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