private void cubicTo(float x1,float y1,float x2,float y2,float x3,float y3){
  mPath.curveTo(x1,y1,x2,y2,mLastX=x3,mLastY=y3);
}

private void cubicTo ( float x1 , float y1 , float x2 , float y2 , float x3 , float y3 ) { mPath . curveTo ( x1 , y1 , x2 , y2 , mLastX = x3 , mLastY = y3 ) ; }
add a cubic bezier from the last point , approaching control points ( x1 , y1 ) and ( x2 , y2 ) , and ending at ( x3 , y3 ) . if no moveto ( ) call has been made for this contour , the first point is automatically set to ( 0 , 0 ) .
