Make level change triggers work in multiplayer? Created 1 year ago2022-08-06 18:13:51 UTC by JacksBestGaming

You know when you play singleplayer, and you see LOADING while it loads the next map? In multiplayer, it doesn't do that. Does anybody know how to fix this?

Coding is required for this to work, this is the only possible way i know.

I have the code open and ready, but I don't know what to add to it to allow level load triggers to work in multiplayer. Do you know how to write the code I need?

Sadly not, im also a beginner in coding. You can ask in the TWHL Discord, in #programming-help

In triggers.cpp there are checks if the game is running in deathmatch mode when doing the level change. I'm not a coder but you can try removing it and see what happens.

In triggers.cpp, roughly around line 1460, you'll see this:

void CChangeLevel :: ChangeLevelNow( CBaseEntity *pActivator )
{
    edict_t    *pentLandmark;
    LEVELLIST    levels[16];

    ASSERT(!FStrEq(m_szMapName, ""));

    // Don't work in deathmatch
    if ( g_pGameRules->IsDeathmatch() )
        return;

    // Some people are firing these multiple times in a frame, disable
    if ( gpGlobals->time == pev->dmgtime )
        return;

    pev->dmgtime = gpGlobals->time;

Simply removing these will NOT actually do it:

// Don't work in deathmatch
if ( g_pGameRules->IsDeathmatch() )
    return;

Instead, you should modify it like this:

// Yes, work in deathmatch
if ( g_pGameRules->IsDeathmatch() )
{
    CHANGE_LEVEL( m_szMapName, nullptr );
    return;
}

In singleplayer, it changes the level with regards to a landmark, equivalent to calling the changelevel2 console command.
This doesn't work in multiplayer, so for that, we pass nullptr to the landmark parameter, which is the same as using the changelevel console command. This means your player(s) will spawn at info_player_deathmatch points in the next map and won't actually carry over smoothly.

You can't do a smooth singleplayer-style transition in multiplayer, if that's what you're looking for.

It works (Thank you!), but I just realized none of the weapons you gather carry over to the next level. Is there any way to add that?

That'd be a bit more complicated. You'd need to keep weapon data on the serverside before the level change, and send it to players when they spawn in the next map. This would involve user messages (read: server-to-client messages) and some bookkeeping.

Alright! I'll research it a bit. Thanks for your help!