nl_tokens: Returns the area of the intersection of two rectangles .
pl_tokens: public static double intersectionArea ( Rectangle2D_F64 a , Rectangle2D_F64 b ) { if ( ! intersects ( a , b ) ) return 0 ; double x0 = Math . <mask> ( a . p0 . x , b . p0 . x ) ; double x1 = Math . min ( a . p1 . x , b . p1 . x ) ; double y0 = Math . max ( a . p0 . y , b . p0 . y ) ; double y1 = Math . min ( a . p1 . y , b . p1 . y ) ; return ( x1 - x0 ) * ( y1 - y0 ) ; }