void CBaseEntity::ComputeTracerStartPosition( const Vector &vecShotSrc, Vector *pVecTracerStart )
{
#ifndef HL2MP
         if ( g_pGameRules->IsMultiplayer() )
         {
                 // NOTE: we do this because in MakeTracer, we force it to use the attachment position
                 // in multiplayer, so the results from this function should never actually get used.
                 pVecTracerStart->Init( 999, 999, 999 );
                 return;
         }
 #endif

         if ( IsPlayer() )
         {
                 // adjust tracer position for player
                 Vector forward, right;
                 CBasePlayer *pPlayer = ToBasePlayer( this );
                 pPlayer->EyeVectors( &forward, &right, NULL );
                 *pVecTracerStart = vecShotSrc + Vector ( 0 , 0 , -4 ) + right * 2 + forward * 16;
         }
         else
         {
                 *pVecTracerStart = vecShotSrc;

                 CBaseCombatCharacter *pBCC = MyCombatCharacterPointer();
                 if ( pBCC != NULL )
                 {
                         CBaseCombatWeapon *pWeapon = pBCC->GetActiveWeapon();

                         if ( pWeapon != NULL )
                         {
                                 Vector vecMuzzle;
                                 QAngle vecMuzzleAngles;

                                 if ( pWeapon->GetAttachment( 1, vecMuzzle, vecMuzzleAngles ) )
                                 {
                                         *pVecTracerStart = vecMuzzle;
                                 }
                         }
                 }
         }
}