Can somebody please convert this code into UScript?

[YoYoBatty]

Here is the code taken from Half Life 2:

#define MAX_VIEWMODEL_LAG 1.5f
void CBaseViewModel::CalcViewModelLag( Vector& origin, QAngle& angles, QAngle& original_angles )
{
 // Calculate our drift
 Vector forward;
 AngleVectors( angles, &forward, NULL, NULL );
 if ( gpGlobals->frametime != 0.0f )
 {
  Vector vDifference;
  VectorSubtract( forward, m_vecLastFacing, vDifference );
  if ( fabs( vDifference.x ) > MAX_VIEWMODEL_LAG ||
    fabs( vDifference.y ) > MAX_VIEWMODEL_LAG ||
    fabs( vDifference.z ) > MAX_VIEWMODEL_LAG )
  {
   m_vecLastFacing = forward;
  }
  // FIXME:  Needs to be predictable?
  VectorMA( m_vecLastFacing, 5.0f * gpGlobals->frametime, vDifference, m_vecLastFacing );
  // Make sure it doesn't grow out of control!!!
  VectorNormalize( m_vecLastFacing );
  VectorMA( origin, 5, vDifference * -1, origin );
 }
 Vector right, up;
 AngleVectors( original_angles, &forward, &right, &up );
 float pitch = original_angles[ PITCH ];
 if ( pitch > 180.0f )
  pitch -= 360.0f;
 else if ( pitch < -180.0f )
  pitch += 360.0f;
 //FIXME: These are the old settings that caused too many exposed polys on some models
 VectorMA( origin, -pitch * 0.035f, forward, origin );
 VectorMA( origin, -pitch * 0.03f,  right, origin );
 VectorMA( origin, -pitch * 0.02f,  up,  origin);
}

This is the original unmodified code, I've made an attempt at converting it from C++ to UScript before and I was unsuccessful. Can somebody help me out?