displayer rerender only when holding left click on displayer.

[MeyerBuaharon]

I made a code in cpp using open3d, and I tried to make it so I run a number of PLYs and show them one after the other.

`

#include <unistd.h>

#include
#include

#include "open3d/Open3D.h"
#include "open3d/geometry/TriangleMesh.h"
#include "open3d/io/TriangleMeshIO.h"
#include "open3d/utility/DataManager.h"
#include "open3d/visualization/visualizer/GuiVisualizer.h"

using namespace open3d;
using namespace open3d::visualization;
using namespace std;

std::shared_ptrgeometry::PointCloud pointcloud_ptr_A(new geometry::PointCloud);

void LoadPLY(geometry::PointCloud& pointcloud_ptr,
char pointcloud_type,
int index) {
if (pointcloud_type == 'A') {
io::ReadPointCloud("../SplitCube/" + std::to_string(index) + "A.ply",
pointcloud_ptr);
}
// does something else...
}

void StartPointCloud(std::shared_ptrgui::SceneWidget widget, std::shared_ptropen3d::visualization::visualizer::O3DVisualizer window, int index)
{

LoadPLY(*(pointcloud_ptr_A.get()), 'B', index);

window->GetScene()->ClearGeometry();

window->GetScene()->AddGeometry("pcdA", pointcloud_ptr_A.get(),
                                rendering::MaterialRecord());

}
void run(std::shared_ptropen3d::visualization::visualizer::O3DVisualizer window, std::shared_ptrgui::SceneWidget widget)
{
int index = 0;
while (true)
{
std::cout << "Thread Is Running:" << std::endl;

    index++;
    if (index == 100)
	{
        index = 1;
    }

    thread t1([index, widget, window]() {
        StartPointCloud(widget, window, index);
    });
	t1.detach();

	this_thread::sleep_for(chrono::milliseconds(40));
}

}

int main(int argc, char* argv[]) {
int width = 1024;
int height = 768;
std::string window_name = "Open3D";
Eigen::Vector3f center = {0.0, 0.0, 0.0};
Eigen::Vector3f eye = {125.0, 125.0, 125.0};
Eigen::Vector3f up = {0.0, 0.0, 1.0};

auto& app = gui::Application::GetInstance();
app.Initialize();

auto window = std::make_shared<open3d::visualization::visualizer::O3DVisualizer>(window_name, width, height);
app.AddWindow(window);

auto widget = std::make_shared<gui::SceneWidget>();

widget->SetScene(std::make_shared<rendering::Open3DScene>(window->GetRenderer()));
window->AddChild(widget);

auto mat = rendering::MaterialRecord();
mat.shader = "defaultLit";
window->GetScene()->GetCamera()->LookAt(center, eye, up);


thread t([window, widget]() { run(window, widget); });
t.detach();

app.Run();

return 0;

}

`

Can I get any pointers on what I did wrong here?