[vtkusers] Symmetry questions

[David Doria]

Try this:

I didn't really look at the logic, but it compiles and doesn't crash.

#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkPolyData.h>
#include <vtkTransform.h>
#include <vtkTransformPolyDataFilter.h>
#include <vtkAppendPolyData.h>
#include <vtkCylinderSource.h>
#include <vtkSmartPointer.h>

int main (int argc, char *argv[])
{
  vtkSmartPointer<vtkCylinderSource> source =
     vtkSmartPointer<vtkCylinderSource>::New();
  source->SetCenter(1,1,1);
  source->Update();

  // Determine which axes are flipped
  bool xFlipped=true;
  bool yFlipped=true;
  //bool yFlipped=false;

  // Add a new vtkAppendData to deal with the new symmetrical data
  vtkSmartPointer<vtkAppendPolyData> appendData =
      vtkSmartPointer<vtkAppendPolyData>::New();

  // Add the source data
  appendData->AddInput(source->GetOutput());

  if(xFlipped)
    {
     // Add a vtkTranform to apply symmetry to the dataset
   vtkSmartPointer<vtkTransform> pTranslationX =
      vtkSmartPointer<vtkTransform>::New();

   pTranslationX->Translate(1.0, 0.0, 0.0);
    // Apply translation filter to data for given symmetry
    vtkSmartPointer<vtkTransformPolyDataFilter> pTransformFilter1 =
        vtkSmartPointer<vtkTransformPolyDataFilter>::New();
    pTransformFilter1->SetInputConnection(source->GetOutputPort());
    pTransformFilter1->SetTransform(pTranslationX);
    pTransformFilter1->Update();

    // Create a vtkPolyData set and add it to the vtkAppendPolyData for the
symmetrical data
    vtkSmartPointer<vtkPolyData> pData1 =
        pTransformFilter1->GetOutput();
    appendData->AddInput(pData1);
      }

  if(yFlipped)
    {
    vtkSmartPointer<vtkTransform> pTranslationY =
        vtkSmartPointer<vtkTransform>::New();
    pTranslationY->Translate(0.0, 1.0, 0.0);
    // Apply translation filter to data for given symmetry
    vtkSmartPointer<vtkPolyData> pTempData =
        appendData->GetOutput();
    vtkSmartPointer<vtkTransformPolyDataFilter> pTransformFilter2 =
        vtkSmartPointer<vtkTransformPolyDataFilter>::New();
    pTransformFilter2->SetInputConnection(source->GetOutputPort());
    pTransformFilter2->SetTransform(pTranslationY);
    pTransformFilter2->Update();

    // Create a vtkPolyData set and add it to the vtkAppendPolyData for the
symmetrical data
    vtkPolyData * pData1 = pTransformFilter2->GetOutput();
    appendData->AddInput(pData1);
    }

  appendData->Update();
  vtkPolyData* result = appendData->GetOutput();

  vtkSmartPointer<vtkPolyDataMapper> mapper =
      vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInput(result);

  vtkSmartPointer<vtkActor> actor =
      vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);

  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();

  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

  // Add Actor to renderer
  renderer->SetBackground(1,1,1); // Background color white

  // Add Actor to renderer
  renderer->AddActor(actor);

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

  return 0;
}


Thanks,

David
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20100208/ddf70fa0/attachment.htm>