nl_tokens: Find the next stackable point starting from the given index .
pl_tokens: function ( idx ) { // If we've previously found a non-NaN point and haven't gone past it yet, // just use that. if ( nextPointIdx >= idx ) return ; // We haven't found a non-NaN point yet or have moved past it, // look towards the right to find a non-NaN point. for ( var j = idx ; j < points . length ; ++ j ) { // Clear out a previously-found point (if any) since it's no longer // valid, we shouldn't use it for interpolation anymore. nextPoint = null ; if ( ! isNaN ( <mask> [ j ] . yval ) && points [ j ] . yval !== null ) { nextPointIdx = j ; nextPoint = points [ j ] ; break ; } } }