static MagickBooleanType TraceArc(MVGInfo *mvg_info,const PointInfo start,
  const PointInfo end,const PointInfo degrees)
{
  PointInfo
    center,
    radius;

  center.x=0.5*(end.x+start.x);
  center.y=0.5*(end.y+start.y);
  radius.x=fabs(center.x-start.x);
  radius.y=fabs(center.y-start.y);
  return(TraceEllipse(mvg_info,center,radius,degrees));
}

Unknown