Resource:IT/Map manager

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Il map manager è una risorsa inclusa nel pacchetto server di MTA:SA DM e comprende comandi, funzioni ed eventi per le gamemodes per gestire dinamicamente le loro mappe. Ad esempio, quando un server ha bisogno di caricare diverse mappe per una race mode, invece di essere messe tutte nella risorsa della gamemode, possono essere inserite in una risorsa separata ed essere successivamente richiamate con la funzione "changeGamemodeMap" quando una nuova gara inizia.

Più specificamente, il map manager memorizza la lista di tutte le gamemodes/mappe e ne gestisce il caricamento; applica alcune impostazioni della mappa che hanno effetto sul mondo del gioco e setta le regole della mappa e il tipo di gioco su ASE. Comprende inoltre una funzione che visualizza ed aggiorna automaticamente nel browser la mode/mappa.

A simple tutorial

In this section we are going to continue the basic gamemode we created in the Introduction to Scripting. We will add a simple map resource that only contains the spawnpoint data for the players, and load the data in the main script when the player needs to spawn.

First of all, we make a folder under /Your MTA Server/mods/deathmatch/resources/, and name it "mymap". Then under /mymap/ directory, create a text file and name it "meta.xml", which is required for every resource.

Enter the following codes in the meta.xml file:

<meta>
   <info type="map" gamemodes="myserver"/>
   <map src="mymap.map"/>
</meta>

Note that this resource is "linked" to the main resource with the gamemodes="" tag, which contains the name of the main resource. In the map tag, it indicates the name of the .map file which contains the actual map data.

Now let's create another text file under /mymap/ and name it "mymap.map", and enter the following codes:

<map>
   <spawnpoint id="spawnpoint1" posX="1959.5487060547" posY="-1714.4613037109" posZ="18" rot="63.350006103516" model="0"/>
</map>

Note that "spawnpoint" is the type of the element, used in getElementsByType function; likewise, "id" is used in getElementByID function.

To load the map data, the main script needs access to the map resource itself. Now let's edit the script.lua file in "myserver" resource. Enter the following code:

function loadMap(startedMap)
	mapRoot = getResourceRootElement(startedMap)
end

addEventHandler("onGamemodeMapStart", g_root, loadMap)

Basically, the "onGamemodeMapStart" event gives us the handle of the map ("startedMap"), which we used to extract the handle of the resource containing the map ("mapRoot").

With the resource handle, we can extract the spawnpoint information from it. Look at the joinHandler() function in script.lua, instead of specifying x, y and z, we can use the map data as the following:

function joinHandler()
	local spawn = getElementsByType("spawnpoint", mapRoot)
	local x,y,z,r
	for key, value in pairs(spawn) do
		x = getElementData(value, "posX")
		y = getElementData(value, "posY")
		z = getElementData(value, "posZ")
		r = getElementData(value, "rot")
	end
	spawnPlayer(source, x, y, z)
	fadeCamera(source, true)
end

Now you may start the gamemode in the server console with the following command:

gamemode myserver mymap

A more advanced tutorial

In this tutorial, instead of starting the map while starting the server with the command above, we'll start the map resource with a few lines of script. This is useful when you have multiple maps and would like to let the server start them automatically.

First of all we need to add a new event handler for onResourceStart event, which is fired when the main script is started manually with the gamemode command. Then in the function binded to the event, we'll load the map resource and start the map:

function Initialize(startedResource)
	mapRes = getResourceFromName("mymap")
	manager = getResourceFromName("mapmanager")
	startResource(mapRes)
	
	call(manager, "changeGamemodeMap", mapRes, getThisResource())
end

addEventHandler("onResourceStart", getResourceRootElement(getThisResource()), Initialize)

The call function lets you use a function defined in another resource, which is the "changeGamemodeMap" function in the "mapmanager" resource in our case.

If you try to run the server now, it will give you several "access denied" errors. That's because the main resource, "myserver", doesn't yet have access to the function startResource by default. We must add the resource in the Access Control List with appropriate rights.

Go to /Your MTA Server/mods/deathmatch/ directory. You will see a file named acl.xml. Open it with Notepad, and insert the following codes:

<group name="myserver">
   <acl name="acl_myserver"/>
   <object name="resource.myserver"/>
</group>
<acl name="acl_myserver">
   <right name="function.startResource" access="true"/>
   <right name="function.stopResource" access="true"/>
   <right name="function.restartResource" access="true"/>
</acl>

Make sure the acl.xml file is closed, then restart the server process. It will reload the ACL settings and give your resource access to the function. Now you can start the gamemode with:

gamemode myserver

And the script will automatically load the map for you.

Usage

To use the map manager, your resources must first be marked as either gamemodes or maps.

You have to tag the gamemode resource with the correct type in its info tag:

<info description="A gamemode" type="gamemode" />

Map resources also need the type="map" tag, plus a gamemodes tag listing the gamemode resources they're compatible with in a comma-separated list without spaces.

<info description="A gamemode map" type="map" gamemodes="ctv,koth" />

There can be only one gamemode and one gamemode map loaded at once.

Optional resource attributes

These attributes all go in the corresponding resource's info tag.

name: A friendly name for your gamemode or map, to be displayed in the start messages or map listings instead of the filename.

Commands

changemap newmap [newgamemode] (changes the gamemode map to a new one, optionally changing the gamemode as well)

changemode newgamemode [newmap] (changes to a new gamemode, optionally starting a map with it)

gamemode newgamemode [newmap] (same as previous one)

stopmode (stops the current mode and mode map)

stopmap (stops the current mode map)

maps [gamemode] (lists all maps in the server, optionally all maps compatible with a gamemode)

gamemodes (lists all gamemodes)

Settings

*mapmanager.color [hex color string] (changes the mapmanager's output messages' color) (default: #E1AA5A)

*mapmanager.messages [boolean] (whether map/gm changes are enabled) (default: true)

*mapmanager.ASE [boolean] (whether the manager will set ASE gametype / mapname) (default: true)

Exported functions

bool changeGamemode ( resource newGamemode, [ resource mapToLoadWith ] )

Changes the gamemode to a new one, optionally specifying an initial map for it (will load without a map by default).

bool changeGamemodeMap ( resource newMap, [ resource gamemodeToChangeTo ] )

Changes the GM map to a new one, optionally specifying a gamemode to change to before loading it (will load with the current gamemode by default).

table getGamemodes ( )

Returns a table of all gamemode resource pointers.

table getGamemodesCompatibleWithMap ( resource theMap )

Returns a table of compatible gamemode resource pointers.

table getMaps ( )

Returns a table of all map resource pointers.

table getMapsCompatibleWithGamemode ( [ resource theGamemode ] )

Returns a table of compatible map resource pointers. If the gamemode is left blank, it returns all maps which aren't compatible with any gamemode.

resource getRunningGamemode ( )

Returns the currently running gamemode's resource pointer.

resource getRunningGamemodeMap ( )

Returns the currently running GM map's resource pointer.

bool isGamemode ( resource theGamemode )

Determines if a resource is a gamemode or not.

bool isGamemodeCompatibleWithMap ( resource theGamemode, resource theMap )

Determines if a gamemode is compatible with a map or not.

bool isMap ( resource theMap )

Determines if a resource is a map or not.

bool isMapCompatibleWithGamemode ( resource theMap, resource theGamemode )

Determines if a map is compatible with a gamemode or not.

bool stopGamemode ( )

Stops the current gamemode and its map.

bool stopGamemodeMap ( )

Stop the current GM map. Determines if a map is compatible with a gamemode or not.

Fired events

(For all these events, "source" is the resource's root element.)

onGamemodeStart ( resource startedGamemode )

Fired before a gamemode starts.

onGamemodeStop ( resource stoppedGamemode )

Fired before a gamemode is stopped.

onGamemodeMapStart ( resource startedMap )

Fired before a GM map starts.

onGamemodeMapStop ( resource stoppedMap )

Fired before a GM map is stopped.

Supported map settings

The following settings from the registry are applied by the map manager when a map is started:
gamespeed [number]: The map's game speed.
gravity [number]: The map's gravity.
time [string of the form hh:mm]: The map's time.
weather [number]: The map's weather ID.
waveheight [number]: The map's wave height.
locked_time [boolean]: Whether the set time will be frozen by the manager or not.
minplayers [number]: The required minimum number of players to start the map.
maxplayers [number]: The allowed maximum number of players to start the map.