code: protected boolean clipToInsideHrect(KDTreeNode node, Instance x) {
      boolean inside = true;
      for (int i = 0; i < m_Instances.numAttributes(); i++) {
        // TODO treat nominals differently!??
  
        if (x.value(i) < node.m_NodeRanges[i][MIN]) {
          x.setValue(i, node.m_NodeRanges[i][MIN]);
          inside = false;
        } else if (x.value(i) > node.m_NodeRanges[i][MAX]) {
          x.setValue(i, node.m_NodeRanges[i][MAX]);
          inside = false;
        }
      }
      return inside;
    }
docs: Finds the closest point in the hyper rectangle to a given point. Change the
  given point to this closest point by clipping of at all the dimensions to
  be clipped of. If the point is inside the rectangle it stays unchanged. The
  return value is true if the point was not changed, so the the return value
  is true if the point was inside the rectangle.
  
  @param node The current KDTreeNode in whose hyperrectangle the closest
  point is to be found.
  @param x		a point
  @return 		true if the input point stayed unchanged.