code: public boolean getBoxBound(float[] corners)
      {
          int rc;
          if ((corners == null) || (corners.length != 6) ||
              ((rc = NativeVertexBuffer.getBoundingVolume(getNative(), corners)) < 0))
          {
              throw new IllegalArgumentException("Cannot copy box bound into array provided");
          }
          return rc != 0;
      }
docs: Returns the bounding box of the vertices.
  @param corners destination array to get corners of bounding box.
  The first three entries are the minimum X,Y,Z values
  and the next three are the maximum X,Y,Z.
  @return true if bounds are not empty, false if empty (no vertices)