How to keep viewer window open?

[mingyangpeng]

Hello, I need help that I want to see the change state of point cloud before and after processing, how to keep the previous window open and create a new window. I didn't find any example.

[ssheorey]

Hi @mingyangpeng check out this example for visualizing updating point clouds in multiple windows:

https://github.com/intel-isl/Open3D/blob/master/examples/python/gui/multiple-windows.py

[mingyangpeng]

Thanks for your advice, I try it OK with python，but when I check out this example with c++ code,it showed below

erminate called after throwing an instance of 'std::runtime_error'
what(): [Open3D Error] (static void open3d::visualization::rendering::EngineInstance::SetResourcePath(const string&)) /home/jhon/dev/Open3D/cpp/open3d/visualization/rendering/filament/FilamentEngine.cpp:66: Can't find resource directory: /home/jhon/kdnv_nano/../resources

gui::Application::GetInstance().Initialize(); <--- I find initial with error.
Is there a simple demo with C++, split window or keep multi window open

[Kristijan10048]

I have the same issue #3833. I am recompiling with hardcoded value to my local resources folder and see if this will help. The problematic function is FindResourcePath(int argc, const char *argv[]) in Open3D\cpp\open3d\visualization\gui\Application.cpp

[germanros1987]

@errissa could you take a look at this? Is this feature still working?

[errissa]

@mingyangpeng I confirmed that the MultipleWindows C++ example (examples/cpp/MultipleWindows.cpp) works as expected.

The visualizer is a little picky about where it looks for the resources it requires so that's why you got the error you got. You have to run the MultipleWindows example from the examples build directory: <cmake_build_dir>/bin/examples. In general, the visualizer looks for its resources in <current_directory>/resources and if it doesn't find it there, then ../resources, and finally current_directory/share/resources.