[Paraview] Outline of vtkImageData incorrect?

[philipp jung]

Thanks for your reply.

Unfortunately i cannot share the dataset. However, the input data only relates to the output data in a way that it provides an upper bound for the output bounds. The actual dimensions and bounds are input by the user and are then processed to extent and spacing which are used for the output properties.

I am constructing the grid in the following way:

    this->seedGrid =    vtkSmartPointer<vtkImageData>::New();

    int extentSeedGrid[6];
    extentSeedGrid[0] = 0;
    extentSeedGrid[1] = static_cast<int>(this->dimensionSeedGrid[0])-1;
    extentSeedGrid[2] = 0;
    extentSeedGrid[3] = static_cast<int>(this->dimensionSeedGrid[1])-1;
    extentSeedGrid[4] = 0;
    extentSeedGrid[5] = static_cast<int>(this->dimensionSeedGrid[2])-1;

    ///Set Size and extent of the seedng grid
    seedGrid->SetExtent(extentSeedGrid);
    seedGrid->SetOrigin(this->originSeedGrid);
    ///Calculate and set spacing of the seeding grid


    this->spacingSeedGrid[0] = this->boundsSeedGrid[0]/static_cast<double>(extentSeedGrid[1]);
    this->spacingSeedGrid[1] = this->boundsSeedGrid[1]/static_cast<double>(extentSeedGrid[3]);
    this->spacingSeedGrid[2] = this->boundsSeedGrid[2]/static_cast<double>(extentSeedGrid[5]);
    this->seedGrid->SetSpacing(this->spacingSeedGrid);



#if VTK_MAJOR_VERSION <= 5

    this->seedGrid->SetNumberOfScalarComponents(1);
    this->seedGrid->SetScalarTypeToDouble();
    this->seedGrid->AllocateScalars();

#else
    this->seedGrid->AllocateScalars(VTK_DOUBLE,1);
#endif


Where dimensionsSeedGrid and boundsSeedGrid are input by the user.
Paraview does show the correct bounds and dimensions within the  information tab.

I hope this provides useful information to find the solution of my problem


Best regards

Philipp Jung


On 25.04.2017 16:22, Utkarsh Ayachit wrote:
If you can share the dataset, it may be easier to point out what could be going wrong.

Thanks
Utkarsh

On Tue, Apr 25, 2017 at 4:47 AM, philipp jung <philippjung2010 at live.de<mailto:philippjung2010 at live.de>> wrote:

Dear all,

Within one of my custom filters i am trying to return an uniform grid, i.e. vtkImageData.

When using the filter within paraview the bounds, extent and spacing are detected correctly, meaning they are the same as the input, as intended. However, the outline representation greatly differs from the outline of the input data. I have included pictures of the surface and point representation of the output. Notice that the "volume" is open on the one side. The outline image shows the outline of the original image, which would be the correct size, while the actual outline is larger than intended. I appreciate any indication what might be causing this behavior.

Best regards

Philipp Jung




[cid:part2.ADD96D4C.ECBA6183 at live.de][cid:part3.5E9C7764.F8D25B20 at live.de][cid:part4.6587D9B7.212D99A3 at live.de]

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