Usage example:
auto grid =
new GridGeometry(Experiment::GridGeometry::XYPlane, *viewport());
grid->SetFirstAxisColor(Color(200, 50, 50));
grid->SetSecondAxisColor(Color(50, 200, 50));
grid->SetGridLinesColor(Color(130,200,255));
new SceneSegment(new GeometryRep(grid), rootSegment);