question: public static GeneralPath stackSpline ( GeneralPath p , float [ ] pts , float epsilon , float slack , boolean closed , float tx , float ty ) { int npoints = 0 ; for ( ; npoints < pts . length ; ++ npoints ) if ( Float . isNaN ( pts [ npoints ] ) ) break ; return stackSpline ( p , pts , 0 , npoints / 2 , epsilon , slack , closed , tx , ty ) ; }
target:  Computes a set of curves using the cardinal spline approach, but using straight lines for completely horizontal or vertical segments.