nl_tokens: / * js / src / d2 / pred / cossign . js Computes the cosinus sign in a right - handed coordinate system ( i . e . clockwise angle values ) . cossign ( x y z ) > 0 iff angle _xyz_ is acute .
pl_tokens: <mask> cossign ( x , y , z ) { return ( y [ 0 ] - x [ 0 ] ) * ( y [ 0 ] - z [ 0 ] ) + ( y [ 1 ] - x [ 1 ] ) * ( y [ 1 ] - z [ 1 ] ) ; }