message: trimesh empty
diff: @@ -335,6 +335,9 @@ namespace ml {
  m_bHasTexCoords = false;
  m_bHasColors = false;
  }
  + bool empty() const {
  + return m_vertices.empty();
  + }
  void transform(const Matrix4x4<FloatType>& m) {
  Matrix4x4<FloatType> invTrans = m.getInverse().getTranspose();
  