Fixing the Dropship gun

Introduction

This article explains the process of fixing npc_combinedropship gun rotation being broken in Source (after Source 2007/Orange Box).

Fixing the Gun's Rotation

Copy the contents of this page, (courtesy of GRAI+) and use it to replace src/game/server/hl2/npc_combinedropship.cpp — You're done!

Alternatively, if you wish to edit the code, the main change it does is add these two lines at the top of CNPC_CombineDropship::UpdateContainerGunFacing, immediately following the assertion statement:

m_poseWeapon_Pitch = m_hContainer->LookupPoseParameter("weapon_pitch");
m_poseWeapon_Yaw = m_hContainer->LookupPoseParameter("weapon_yaw");

Tip:If you're developing a Source 2013 mod, you could opt to use a community repo, that has bugs like these fixed by default.