[vtk-developers] update position when moving a sphere

[M.M Mhiri]

hi, i'm using multiple Style for the windows interactorso no way to use trackballActor.

i want to move a sphereSource with the key button
press up button  to move on the x axis etc ...
the sphere is moving correctly but i have to clic anywhere to validate the movementor to update the position. I don't know how to resolve this.
why i have to clic to update the position of the sphere?
here is my code :------------------------------------------------------------------------
float posX =0.0;
float posY= 0.0;
float posZ =0.0;
vtkSphereSource *sphere0;

class KeyPressInteractorStyle : public vtkInteractorStyleTrackballCamera
{
    public: static KeyPressInteractorStyle* New();
    vtkTypeMacro(KeyPressInteractorStyle, vtkInteractorStyleTrackballCamera);
    
    
    virtual void OnKeyPress() 
    {
        // Get the keypress
        vtkRenderWindowInteractor *rwi = this->Interactor;
        std::string key = rwi->GetKeySym();
        
        // Output the key that was pressed
        std::cout << "Pressed " << key << std::endl;
        
        // pos x Right
        if(key == "Right")
        {   
            posX+=0.1;
            sphere0->SetCenter(posX,posY,posZ);
            sphere0->Update();
        }
        
        // pos x Left
        if(key == "Left")
        {   
            posX-=0.1;
            sphere0->SetCenter(posX,posY,posZ);
            sphere0->Update();
        }
        
        if(key == "Up")
        {   
            posY+=0.1;
            sphere0->SetCenter(posX,posY,posZ);
            sphere0->Update();
        }
        
        if(key == "Down")
        {   
            posY-=0.1;
            sphere0->UpdateInformation();
            sphere0->SetCenter(posX,posY,posZ);
            sphere0->Update();
        }
        
        // Forward events
        vtkInteractorStyleTrackballCamera::OnKeyPress();
    }
    
};
vtkStandardNewMacro(KeyPressInteractorStyle);


int main(int, char *[])
{    sphere0 = vtkSphereSource::New(); 
    sphere0->SetPhiResolution(50);
    sphere0->SetThetaResolution(50);
    sphere0->SetCenter(posX,posY,posZ);
    sphere0->SetRadius(0.4);
    sphere0->Update();

Mapper, Actor, etc .....

}





 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtk-developers/attachments/20120413/4d75aeaa/attachment.html>