Hi,
I am trying to use vtkGenericOpenGLRenderWindow instead of vtkRenderWindow in the example given for VtkSphereWidget2(https://lorensen.github.io/VTKExamples/site/Cxx/Widgets/SphereWidget2/) ,I don’t see any renderWindow when I run the executable.
#include <vtkCommand.h>
#include <vtkMath.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkSphere.h>
#include <vtkSphereRepresentation.h>
#include <vtkSphereWidget2.h>
#include <vtkGenericOpenGLRenderWindow.h>
// Callback that displays the sphere widget's spherical handle postion
// in both sphercial (relative to the widget's center) and cartesian global coordinates
class vtkSphereCallback : public vtkCommand
{
public:
static vtkSphereCallback *New()
{
return new vtkSphereCallback;
}
virtual void Execute(vtkObject *caller, unsigned long, void*)
{
vtkSphereWidget2 *sphereWidget =
reinterpret_cast<vtkSphereWidget2*>(caller);
double center[3], handlePosition[3];
vtkSphereRepresentation* sphereRepresentation =
dynamic_cast<vtkSphereRepresentation*>( sphereWidget->GetRepresentation() );
sphereRepresentation->GetHandlePosition( handlePosition );
sphereRepresentation->GetSphere( this->Sphere );
this->Sphere->GetCenter( center );
double radius = sqrt( static_cast<double>(vtkMath::Distance2BetweenPoints( center, handlePosition ) ) );
radius = (radius <= 0.0 ? 1.0 : radius );
double theta = vtkMath::DegreesFromRadians( atan2( ( handlePosition[1] - center[1] ), ( handlePosition[0] - center[0] ) ) );
double phi = vtkMath::DegreesFromRadians( acos( ( handlePosition[2] - center[2] ) / radius ) );
std::cout << "r, theta, phi: ("
<< std::setprecision(3)
<< radius << ", " << theta << ", " << phi << ") "
<< "x, y, z: ("
<< handlePosition[0] << ", "
<< handlePosition[1] << ", "
<< handlePosition[2] << ") "
<< std::endl;
}
vtkSphereCallback(){ this->Sphere = vtkSphere::New(); }
~vtkSphereCallback(){ this->Sphere->Delete(); }
vtkSphere* Sphere;
};
int main( int, char *[] )
{
// Create a renderer and a render window
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
//vtkSmartPointer<vtkRenderWindow> renderWindow =
// vtkSmartPointer<vtkRenderWindow>::New();
vtkSmartPointer<vtkGenericOpenGLRenderWindow> renderWindow = vtkSmartPointer<vtkGenericOpenGLRenderWindow>::New();
renderWindow->AddRenderer(renderer);
// Create an interactor
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
// Create a sphere widget
vtkSmartPointer<vtkSphereWidget2> sphereWidget =
vtkSmartPointer<vtkSphereWidget2>::New();
sphereWidget->SetInteractor(renderWindowInteractor);
sphereWidget->CreateDefaultRepresentation();
vtkSphereRepresentation* sphereRepresentation =
dynamic_cast<vtkSphereRepresentation*>( sphereWidget->GetRepresentation() );
sphereRepresentation->HandleVisibilityOff();
sphereRepresentation->RadialLineOff();
sphereRepresentation->HandleTextOff();
vtkSmartPointer<vtkSphereCallback> sphereCallback =
vtkSmartPointer<vtkSphereCallback>::New();
sphereWidget->AddObserver( vtkCommand::InteractionEvent, sphereCallback );
renderWindow->Render();
renderWindowInteractor->Initialize();
renderWindow->Render();
sphereWidget->On();
// Begin mouse interaction
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
Could someone help me with this?
Thank you.
Best Regards,
Mallikarjun