# VTK
**URL:** https://discourse.vtk.org/t/vtk/4276
**Category:** Support
**Created:** [September 22, 2020, 1:42pm UTC](https://discourse.vtk.org/t/vtk/4276 "2020-09-22T13:42:14Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@cyAAA111](https://discourse.vtk.org/u/cyAAA111)
#### Post date: [September 22, 2020, 1:42pm UTC](https://discourse.vtk.org/t/vtk/4276/1 "2020-09-22T13:42:14Z")
Excuse me, how to use volume data to achieve 10000X10000X1000 resolution drawing, thank you very much.
---
### Author:  [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [September 22, 2020, 3:49pm UTC](https://discourse.vtk.org/t/vtk/4276/2 "2020-09-22T15:49:04Z")
What are you trying to achieve? What is the problem you are experiencing?
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### Author:  [@cyAAA111](https://discourse.vtk.org/u/cyAAA111)
#### Post date: [September 23, 2020, 2:04pm UTC](https://discourse.vtk.org/t/vtk/4276/3 "2020-09-23T14:04:21Z")
I use VTK to produce a 3-D model with volum data(1024_1024_1024), but I found I cannot deal with volum data(10000_10000_1000). So I want to know how to deal with these big volum data(10000_10000_1000) with VTK. My code are as follows:
#include “vtkSmartPointer.h”
#include “vtkOpenGLGPUVolumeRayCastMapper.h”
#include “vtkPiecewiseFunction.h”
#include “vtkColorTransferFunction.h”
#include “vtkContourValues.h”
#include “vtkInteractorStyleTrackballCamera.h”
#include “vtkMetaImageReader.h”
#include “vtkRenderWindow.h”
#include “vtkRenderWindowInteractor.h”
#include “vtkRenderer.h”
#include “vtkCamera.h”
#include “vtkVolume.h”
#include “vtkVolumeProperty.h”
#include “vtkNamedColors.h”
int main(int argc, char\* argv[])
{
vtkSmartPointer reader =
vtkSmartPointer::New();
reader-\>SetFileName(“FullHead.mhd”); //reader-\>SetFileName(argv[1]);
```
auto colorTransferFunction =
vtkSmartPointer::New();
colorTransferFunction->RemoveAllPoints();
colorTransferFunction->AddRGBPoint(2, 1, 0, 0);
colorTransferFunction->AddRGBPoint(1, 0, 1, 0);
colorTransferFunction->AddRGBPoint(0, 0, 0, 1);
auto scalarOpacity =
vtkSmartPointer::New();
scalarOpacity->AddPoint(2, 0);
scalarOpacity->AddPoint(1, 0.5);
scalarOpacity->AddPoint(0, 1);
auto volumeProperty =
vtkSmartPointer::New();
volumeProperty->ShadeOn();
volumeProperty->SetInterpolationType(2);
```
volumeProperty-\>SetColor(colorTransferFunction);
volumeProperty-\>SetScalarOpacity(scalarOpacity);
```
auto mapper =
vtkSmartPointer::New();
mapper->SetInputConnection(reader->GetOutputPort());
mapper->AutoAdjustSampleDistancesOff();
mapper->SetSampleDistance(0.5);
//mapper->SetBlendModeToIsoSurface();
//volumeProperty->GetIsoSurfaceValues()->SetValue(0, 128);
//volumeProperty->GetIsoSurfaceValues()->SetValue(1, 255);
auto volume =
vtkSmartPointer::New();
volume->SetMapper(mapper);
volume->SetProperty(volumeProperty);
auto colors =
vtkSmartPointer::New();
auto renderer =
vtkSmartPointer::New();
renderer->AddVolume(volume);
renderer->SetBackground(colors->GetColor3d("white").GetData());
renderer->ResetCamera();
auto renderWindow =
vtkSmartPointer::New();
renderWindow->SetSize(800, 800);
renderWindow->AddRenderer(renderer);
auto style =
vtkSmartPointer::New();
auto interactor =
vtkSmartPointer::New();
interactor->SetRenderWindow(renderWindow);
interactor->SetInteractorStyle(style);
// Generate a good view
vtkSmartPointer aCamera =
vtkSmartPointer::New();
aCamera->SetViewUp(0, 0, -1);
aCamera->SetPosition(0, -1, 0);
aCamera->SetFocalPoint(0, 0, 0);
renderer->SetActiveCamera(aCamera);
renderer->ResetCamera();
aCamera->Azimuth(30.0);
aCamera->Elevation(30.0);
aCamera->Dolly(1.5);
renderer->ResetCameraClippingRange();
renderWindow->Render();
interactor->Start();
return EXIT_SUCCESS;
```
}
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### Author:  [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [September 23, 2020, 3:57pm UTC](https://discourse.vtk.org/t/vtk/4276/4 "2020-09-23T15:57:44Z")
This is a rather large volume for volume rendering. If you find that your graphics card cannot deal with it then you can upgrade your hardware or resample and/or crop the image. If your GPU memory size is big enough and you just exceed the maximum texture size then you can try to adjust partitions size - see this topic: [Volume rendering invalid texture dimensions](https://discourse.vtk.org/t/volume-rendering-invalid-texture-dimensions/3917/8).
---
### Author:  [@cyAAA111](https://discourse.vtk.org/u/cyAAA111)
#### Post date: [September 24, 2020, 6:30am UTC](https://discourse.vtk.org/t/vtk/4276/5 "2020-09-24T06:30:57Z")
Thank you very much.