how to cut a png image in vtk by Qt..!

sankarapandiyan

i have done a code but for the png the mapping is some what different ,
see the last four lines of the code

callback->Plane=plane;
callback->Actor=pngActor;
///////callback->mapper=pngMapper;//////// this is the line which i have commit some mistake ..but ,i dontknow how to resolve this

i have a error like this
: error: cannot convert 'vtkSmartPointer<vtkDataSetMapper>' to 'vtkPolyDataMapper*' in assignment

and this is my code,

       #include <vtkSmartPointer.h>
      // For the rendering pipeline setup:
        #include <vtkConeSource.h>
      #include <vtkPNGReader.h>
    #include <vtkDataSetMapper.h>
      #include <vtkClipDataSet.h>
      #include <vtkDataSetMapper.h>
      #include <vtkPolyDataMapper.h>
     #include <vtkActor.h>
    #include <vtkRenderer.h>
   #include <vtkRenderWindow.h>
   #include <vtkRenderWindowInteractor.h>
      #include <vtkInteractorStyleTrackballCamera.h>

// For boxthreed:
//#include <boxthreed.h>
#include <vtkCommand.h>
#include <vtkTransform.h>
#include <vtkPlane.h>
#include <vtkClipPolyData.h>
#include "boxthreed.h"
#include "planerep.h"

class vtkMyCallback : public vtkCommand
{public: static
vtkMyCallback *New()
{ return new vtkMyCallback;
} virtual void Execute( vtkObject caller, unsigned long, void )
{
vtkSmartPointer<vtkTransform> t =
vtkSmartPointer<vtkTransform>::New();
boxthreed widget = reinterpret_cast<boxthreed>(caller);
widget->GetTransform( t );
// widget->GetPlanes(this->Plane);
// widget->getmapper(this->mapper);

// widget->GetProp3D()->SetUserTransform( t );

vtkMyCallback():Plane(0),Actor(0){}
vtkPlane *Plane;
vtkActor *Actor;
vtkPolyDataMapper *mapper;
// vtkDataSetMapper *mapper;
};

int main( int vtkNotUsed( argc ), char* vtkNotUsed( argv )[] )
{
// vtkSmartPointer<vtkConeSource> cone =
// vtkSmartPointer<vtkConeSource>::New();

vtkSmartPointer<vtkPNGReader> pngreader =
  vtkSmartPointer<vtkPNGReader>::New();
  pngreader->SetFileName("/home/sara/Desktop/sankar/vtk/png  /imagee.png");

vtkSmartPointer<vtkPlane> plane =
vtkSmartPointer<vtkPlane>::New();

vtkSmartPointer<vtkClipDataSet> clipper =
vtkSmartPointer<vtkClipDataSet>::New();
// clipper->SetClipFunction(plane);
clipper->InsideOutOn();
clipper->SetInputConnection(pngreader->GetOutputPort());

vtkSmartPointer<vtkDataSetMapper> pngMapper =
vtkSmartPointer<vtkDataSetMapper>::New();
pngMapper->SetInputConnection( pngreader->GetOutputPort() );
// pngMapper->SetInputConnection(clipper->GetOutputPort());

// pngMapper->AddClippingPlane(plane);

vtkSmartPointer<vtkActor> pngActor =
vtkSmartPointer<vtkActor>::New();
pngActor->SetMapper( pngMapper );

vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor( pngActor );
renderer->SetBackground( 0.1, 0.2, 0.4 );

vtkSmartPointer<vtkRenderWindow> window =
vtkSmartPointer<vtkRenderWindow>::New();
window->AddRenderer( renderer );
window->SetSize( 300, 300 );

vtkSmartPointer<vtkRenderWindowInteractor> interactor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
interactor->SetRenderWindow( window );

vtkSmartPointer<vtkInteractorStyleTrackballCamera> style =
vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
interactor->SetInteractorStyle( style );

vtkSmartPointer<boxthreed> boxWidget =
vtkSmartPointer<boxthreed>::New();
boxWidget->SetInteractor( interactor );
boxWidget->SetProp3D( pngActor );

boxWidget->SetPlaceFactor( 1.25 );
// Make the box 1.25x larger than the actor
boxWidget->PlaceWidget();
vtkSmartPointer<vtkMyCallback> callback =
vtkSmartPointer<vtkMyCallback>::New();
callback->Plane=plane;
callback->Actor=pngActor;
callback->mapper=pngMapper;
boxWidget->AddObserver( vtkCommand::InteractionEvent, callback );
boxWidget->On();
interactor->Start();

return EXIT_SUCCESS;
}

jsulm

@sankarapandiyan said in how to cut a png image in vtk by Qt..!:

: error: cannot convert 'vtkSmartPointer<vtkDataSetMapper>' to 'vtkPolyDataMapper*' in assignment

It's completely unrelated to Qt. You're assigning a variable of wrong type.

sankarapandiyan

@jsulm i have build a vtk here in qt

jsulm

@sankarapandiyan So what?

callback->Plane=plane;
callback->Actor=pngActor;
///////callback->mapper=pngMapper;

This isn't related to Qt. This is code using VTK not Qt.

sankarapandiyan

@jsulm yes sure this is the vtk code ... but implemented in qt only .. thats why i post a ques here ..

jsulm

@sankarapandiyan Take a look at the error message and fix your code.
"but implemented in qt only" - Qt is not a programming language, you're implementing it in C++.

sankarapandiyan

@jsulm yes sure ... but for png we have using different mappers and for poly data image we are using different mappers that is the problem i dont know how to create mappers of the different one with seperately/...

jsulm

@sankarapandiyan I guess you need to get the RAW pointer (vtkDataSetMapper*) from vtkSmartPointer<vtkDataSetMapper> and assign it and not the vtkSmartPointer

sankarapandiyan

@jsulm ok sure yes you are right..

sankarapandiyan

@jsulm sure.. i will try