View Issue Details [ Jump to Notes ] [ Print ]
IDProjectCategoryView StatusDate SubmittedLast Update
0001625VTK(No Category)public2005-02-28 12:042016-08-12 09:54
ReporterJohn Norris 
Assigned ToKitware Robot 
PrioritynormalSeveritymajorReproducibilityalways
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Summary0001625: vtkAppendPolyData scrambles cell data in certain cases
DescriptionWith certain inputs, vtkAppendPolyData fails to combine cell data properly. In the example code below, we start with a vtkPolyData generated by vtkSurfaceDataFilter from a simple vtkStructuredPoints. This is clipped with vtkClipPolyData and cut with vtkCutter. The results of these two are appended together, but the cell data isn't processed correctly.

When CLIP is #defined to 0, you see the unclipped surface. When CLIP is 1, you see the clipped (and erronously colored) surface.

///////////////////////////////////////////////

#include <vtkActor.h>
#include <vtkAppendPolyData.h>
#include <vtkCellData.h>
#include <vtkClipPolyData.h>
#include <vtkCutter.h>
#include <vtkDataSetSurfaceFilter.h>
#include <vtkFloatArray.h>
#include <vtkOutlineFilter.h>
#include <vtkPlane.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkScalarBarActor.h>
#include <vtkScalarsToColors.h>
#include <vtkStructuredPoints.h>

#define CLIP 0

int main()
{
  vtkFloatArray* pData = vtkFloatArray::New();
  pData->SetNumberOfValues(5);
  pData->SetValue(0, 0.f);
  pData->SetValue(1, 1.f);
  pData->SetValue(2, 2.f);
  pData->SetValue(3, 1.f);
  pData->SetValue(4, 0.f);

  vtkStructuredPoints* pGrid = vtkStructuredPoints::New();
  pGrid->SetDimensions(6, 2, 2);
  pGrid->GetCellData()->SetScalars(pData);
  pData->Delete();

  vtkDataSetSurfaceFilter* pSurface = vtkDataSetSurfaceFilter::New();
  pSurface->SetInput(pGrid);

  vtkPlane* pPlane = vtkPlane::New();
  pPlane->SetOrigin(2.5, 0.0, 0.0);
  pPlane->SetNormal(1.0, 0.0, 0.0);

  vtkClipPolyData* pClipper = vtkClipPolyData::New();
  pClipper->SetInput(pSurface->GetOutput());
  pClipper->SetClipFunction(pPlane);

  vtkCutter* pCutter = vtkCutter::New();
  pCutter->SetInput(pSurface->GetOutput());
  pCutter->SetCutFunction(pPlane);
  pPlane->Delete();

  vtkAppendPolyData* pAppender = vtkAppendPolyData::New();
#if CLIP
  pAppender->AddInput(pClipper->GetOutput());
  pAppender->AddInput(pCutter->GetOutput());
#else
  pAppender->AddInput(pSurface->GetOutput());
#endif // CLIP
  pSurface->Delete();
  pClipper->Delete();
  pCutter->Delete();

  vtkPolyDataMapper* pMapper = vtkPolyDataMapper::New();
  pMapper->SetInput(pAppender->GetOutput());
  pMapper->SetScalarRange(0.0, 2.0);

  vtkScalarBarActor* pSB = vtkScalarBarActor::New();
  pMapper->CreateDefaultLookupTable();
  pSB->SetLookupTable(pMapper->GetLookupTable());

  vtkActor* pActor = vtkActor::New();
  pActor->SetMapper(pMapper);
  pMapper->Delete();

  vtkRenderer* pRenderer = vtkRenderer::New();
  pRenderer->AddActor(pActor);
  pActor->Delete();
  pRenderer->AddActor(pSB);
  pSB->Delete();

  vtkOutlineFilter* pOutline = vtkOutlineFilter::New();
  pOutline->SetInput(pGrid);
  pGrid->Delete();

  pMapper = vtkPolyDataMapper::New();
  pMapper->SetInput(pOutline->GetOutput());
  pOutline->Delete();

  pActor = vtkActor::New();
  pActor->SetMapper(pMapper);
  pActor->GetProperty()->SetColor(1.0, 1.0, 1.0);
  pMapper->Delete();

  pRenderer->AddActor(pActor);
  pActor->Delete();

  vtkRenderWindow* pWindow = vtkRenderWindow::New();
  pWindow->AddRenderer(pRenderer);
  pRenderer->Delete();

  vtkRenderWindowInteractor* pInteractor = vtkRenderWindowInteractor::New();
  pInteractor->SetRenderWindow(pWindow);
  pWindow->Delete();

  pInteractor->Start();

  pInteractor->Delete();

  return 0;
}
TagsNo tags attached.
Project
Type
Attached Files

 Relationships

  Notes
(0014444)
Basel (reporter)
2008-12-26 18:41

 Hi All,
Also I'm having the same problem with vtkAppendPolyData::AddInput() it seems that it doesn't combine the different polydata objects.
I'm trying to read 3DS file and append all its meshes into one Actor but append->AddInput(polyData); doesn't work propapley.
My code is similar to this:
vtk3DSImporter *importer = vtk3DSImporter::New();
        importer->SetFileName("Sample.3ds");
        importer->ComputeNormalsOn();
        importer->Read();
vtkAppendPolyData* append = vtkAppendPolyData::New();
for (vtk3DSMesh* mesh = importer->MeshList; mesh != (vtk3DSMesh *) NULL;
            mesh = (vtk3DSMesh *) mesh->next){

                vtkPolyData* polyData = mesh->aPolyData;

            if(polyData!=NULL)
                append->AddInput(polyData);
        }

vtkPolyDataMapper* mapper = vtkPolyDataMapper::New();
mapper->SetInputConnection(append->GetOutputPort());

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

So please advise me what I've to do to tranfer 3DS to actor object.
Thanks
(0036771)
Kitware Robot (administrator)
2016-08-12 09:54

 Resolving issue as `moved`.

This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page.

 Issue History
Date Modified Username Field Change
2008-11-30 09:22 Mathieu Malaterre Assigned To Mathieu Malaterre => François Bertel
2008-11-30 20:18 François Bertel Assigned To François Bertel =>
2008-12-26 18:41 Basel Note Added: 0014444
2011-06-16 13:11 Zack Galbreath Category => (No Category)
2016-08-12 09:54 Kitware Robot Note Added: 0036771
2016-08-12 09:54 Kitware Robot Status expired => closed
2016-08-12 09:54 Kitware Robot Resolution open => moved
2016-08-12 09:54 Kitware Robot Assigned To => Kitware Robot

Copyright © 2000 - 2018 MantisBT Team