Changing view point in C++

Hi everybody,
I want to change the view point of the visualizer in C++, but it does not work and I am running out of ideas why that is. No matter what I set front_, lookat_ or up_ to, it doesn’t change the view in the visualizer window. Here is a minimal toy example:

```
// Create Visualizer and point cloud
open3d::visualization::Visualizer vis;
vis.CreateVisualizerWindow("Open3D");
std::vector points = std::vector();
for (int i = 0; i < 1000; i++)
{
auto tmp = Eigen::Vector3d(rand() % 100, rand() % 100, rand() % 100);
points.push_back(tmp);
}
open3d::geometry::PointCloud point_cloud = open3d::geometry::PointCloud(points);
std::shared_ptr cloud_ptr = std::make_shared(point_cloud);
vis.AddGeometry(cloud_ptr);

// Change view
open3d::visualization::ViewControl view_control = vis.GetViewControl();
auto view_params = open3d::visualization::ViewParameters();
view_control.ConvertToViewParameters(view_params);
view_params.front_ = Eigen::Vector3d(15, 30, 0);
view_params.lookat_ = Eigen::Vector3d(2, 5, -0.3);
view_params.up_ = Eigen::Vector3d(4, -1, 0);
view_control.ConvertFromViewParameters(view_params);

while (true)
{
vis.UpdateGeometry();
vis.UpdateRender();
vis.PollEvents();
}
```

I can not find any examples of this, so any advice would be greatly appreciated.

best regards!