game/server: fix particle transition from trigger_vphysics_motion

game/server/triggers.cpp

@@ -4623,7 +4623,8 @@ void CTriggerVPhysicsMotion::StartTouch( CBaseEntity *pOther )
 #ifndef _XBOX
 	if ( m_ParticleTrail.m_strMaterialName != NULL_STRING )
 	{
-		CEntityParticleTrail::Create( pOther, m_ParticleTrail, this ); 
+		CEntityParticleTrail *pTrail = CEntityParticleTrail::Create( pOther, m_ParticleTrail, this ); 
+		pTrail->SetShouldDeletedOnChangelevel( true );
 	}
 #endif
 

game/shared/baseparticleentity.cpp

@@ -35,6 +35,7 @@ CBaseParticleEntity::CBaseParticleEntity( void )
 	m_bSimulate = true;
 	m_nToolParticleEffectId = TOOLPARTICLESYSTEMID_INVALID;
 #endif
+	m_bShouldDeletedOnChangelevel = false;
 }
 
 CBaseParticleEntity::~CBaseParticleEntity( void )

game/shared/baseparticleentity.h

@@ -35,6 +35,16 @@ public:
 	CBaseParticleEntity();
 	virtual ~CBaseParticleEntity();
 
+	virtual int ObjectCaps()
+	{
+		if( m_bShouldDeletedOnChangelevel )
+			return BaseClass::ObjectCaps() & ~FCAP_ACROSS_TRANSITION;
+		else
+			return BaseClass::ObjectCaps();
+	}
+
+	void SetShouldDeletedOnChangelevel( bool bDel ) { m_bShouldDeletedOnChangelevel = bDel; }
+
 	// CBaseEntity overrides.
 public:
 #if !defined( CLIENT_DLL )
@@ -76,6 +86,8 @@ public:
 	void			SetLifetime(float lifetime);
 
 private:
+	bool			m_bShouldDeletedOnChangelevel;
+
 	CBaseParticleEntity( const CBaseParticleEntity & ); // not defined, not accessible
 };