private void rQuadTo(float dx1,float dy1,float dx2,float dy2){
  if (isEmpty()) {
    mPath.moveTo(mLastX=0,mLastY=0);
  }
  dx1+=mLastX;
  dy1+=mLastY;
  dx2+=mLastX;
  dy2+=mLastY;
  mPath.quadTo(dx1,dy1,mLastX=dx2,mLastY=dy2);
}

private void rQuadTo ( float dx1 , float dy1 , float dx2 , float dy2 ) { if ( isEmpty ( ) ) { mPath . moveTo ( mLastX = 0 , mLastY = 0 ) ; } dx1 += mLastX ; dy1 += mLastY ; dx2 += mLastX ; dy2 += mLastY ; mPath . quadTo ( dx1 , dy1 , mLastX = dx2 , mLastY = dy2 ) ; }
same as quadto , but the coordinates are considered relative to the last point on this contour . if there is no previous point , then a moveto ( 0 , 0 ) is inserted automatically .
