Fix Missing Player Animations

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January 2024

This article only applies to the Source Multiplayer SDK.

By default, the 06/15/2009 Source SDK update includes source code that makes several calls to swimming animations that do not yet exist with the current Half-Life 2: Deathmatch player animations. As a result, whenever water goes above a player's waist, the models go into their reference pose.

The Fix

Here's how to fix this issue:

In multiplayer_animstate.cpp:

In the bool CMultiPlayerAnimState::HandleSwimming( Activity &idealActivity ) function,

Change:

idealActivity = ACT_MP_SWIM;

...to...

idealActivity = ACT_MP_RUN;

Now whenever water goes up to a player's waist, the code will call for the Half-Life 2: Deathmatch run animation, which is a good alternative because it already exists and makes the player look like they are swimming and wading through the water.