[vtkusers] I have some problems when deal with key press callback

[Xianliang.Zeng]

Try ren->ResetCamera() in you callback function just before Render().





At 2014-11-17 23:25:57, "zhq" <15891495523 at 126.com> wrote:
>Deal all :
>
>      What I want to do is : make a transform on a cone when a key
>(whatever) is pressed . 
>
>      the problem I met is :  the cone will disappear in the window when a
>transform happen . 
>
>      My code is :
>
>#include <vtkRenderWindow.h>
>#include <vtkRenderWindowInteractor.h>
>#include <vtkRenderer.h>
>#include <vtkJPEGReader.h>
>#include <vtkImageData.h>
>#include <vtkSmartPointer.h>
>#include <vtkImageViewer2.h>
>#include <vtkImageBlend.h>
>#include <string>
>#include <vtkSTLReader.h>
>#include <vtkInteractorStyleTrackballCamera.h>
>#include <vtkPolyDataMapper.h>
>#include "vtkActor.h"
>#include <vtkCallbackCommand.h>
>#include <vtkTransform.h>
>#include <vtkTransformPolyDataFilter.h>
>#include <vtkSphereSource.h>
>#include <vtkConeSource.h>
>vtkSmartPointer<vtkConeSource> cone = vtkSmartPointer<vtkConeSource>::New();
>
>vtkSmartPointer<vtkRenderWindowInteractor> iren =
>vtkSmartPointer<vtkRenderWindowInteractor>::New();
>vtkSmartPointer<vtkTransform> trans = vtkSmartPointer<vtkTransform>::New();
>vtkSmartPointer<vtkActor> actor1 = vtkSmartPointer<vtkActor>::New();
>vtkSmartPointer<vtkActor> actor2 = vtkSmartPointer<vtkActor>::New();
>vtkSmartPointer<vtkPolyDataMapper> mapper1 =
>vtkSmartPointer<vtkPolyDataMapper>::New();
>vtkSmartPointer<vtkPolyDataMapper> mapper2 =
>vtkSmartPointer<vtkPolyDataMapper>::New();
>
>int x=0,y=0,z=0;
>
>void MyCallbackFunc(vtkObject * , unsigned long eid , void * clientdata ,
>void * calldata)
>{
>
>	x++;
>
>	trans->Translate(x,y,z) ;
>	trans->Scale(2, 3, 1);
>	trans->RotateX(0);
>
>	vtkSmartPointer<vtkTransformPolyDataFilter> transformFilter =
>		vtkSmartPointer<vtkTransformPolyDataFilter>::New();
>	transformFilter->SetInputConnection(cone->GetOutputPort());
>	transformFilter->SetTransform(trans);
>	transformFilter->Update();
>	mapper1->SetInputConnection(transformFilter->GetOutputPort());
>	iren->Render();
>}
>
>void main()
>{
>
>	vtkSmartPointer<vtkRenderWindow> renWin =
>vtkSmartPointer<vtkRenderWindow>::New();
>	
>	vtkSmartPointer<vtkSphereSource> sphereSource =
>		vtkSmartPointer<vtkSphereSource>::New();
>	sphereSource->Update();
>
>	cone->Update();
>	
>
>	
>	mapper1->SetInputConnection(sphereSource->GetOutputPort());
>	mapper1->Update();
>
>	
>	mapper2->SetInputConnection(cone->GetOutputPort());
>	mapper2->Update();
>
>
>	actor1->SetMapper(mapper1);
>	
>	actor2->SetMapper(mapper2);
>
>	vtkSmartPointer<vtkRenderer> ren = vtkSmartPointer<vtkRenderer>::New();
>	ren->AddActor(actor1);
>	ren->AddActor(actor2);
>	
>
>	
>	vtkSmartPointer<vtkInteractorStyleTrackballCamera> style =
>vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
>	
>	iren->SetInteractorStyle(style);
>	renWin->AddRenderer(ren);
>	renWin->SetInteractor(iren);
>	
>
>	ren->SetBackground(0.3,0.6,0.3);
>
>	vtkSmartPointer<vtkCallbackCommand> KeyPressCallback =
>vtkSmartPointer<vtkCallbackCommand>::New();
>	KeyPressCallback->SetCallback(&MyCallbackFunc);
>
>
>	iren->AddObserver(vtkCommand::KeyPressEvent,KeyPressCallback);
>
>
>	renWin->Render();
>	iren->Initialize();
>	iren->Start();
>}
>
>        Thanks in advance !
>
>Zhq
>
>
>
>--
>View this message in context: http://vtk.1045678.n5.nabble.com/I-have-some-problems-when-deal-with-key-press-callback-tp5729478.html
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