code: private void expand(final Vector3f... vertices) {
          mVertices = appendArrays(mVertices, vertices);
  
          if (vertices != null) {
              for (Vector3f vertex : vertices) {
                  mMinCorner.min(vertex);
                  mMaxCorner.max(vertex);
  
                  Vector3f temp = new Vector3f(mMinCorner);
                  mCenter = new Vector3f(mMinCorner.x + (mMaxCorner.x - mMinCorner.x) * .5f,
                          mMinCorner.y + (mMaxCorner.y - mMinCorner.y) * .5f,
                          mMinCorner.z + (mMaxCorner.z - mMinCorner.z) * .5f);
                  temp.set(mMaxCorner);
                  mRadius = temp.sub(mMinCorner).length() * .5f;
              }
          }
      }
docs: Expands the bounding box as necessary to encompass {@code vertices}.
  
  @param vertices
  The vertices to encompass.