private void rMoveTo(float dx,float dy){
  dx+=mLastX;
  dy+=mLastY;
  mPath.moveTo(mLastX=dx,mLastY=dy);
}

private void rMoveTo ( float dx , float dy ) { dx += mLastX ; dy += mLastY ; mPath . moveTo ( mLastX = dx , mLastY = dy ) ; }
set the beginning of the next contour relative to the last point on the previous contour . if there is no previous contour , this is treated the same as moveto ( ) .
