[vtkusers] Problem with vtkPolyLine width greater than 20

[Jothybasu Selvaraj]

If you want such a thick line, why don't you use vtkTubeFilter?

Jothy

On Thu, Apr 26, 2012 at 1:11 PM, Stefan Köhnen
<stefan.khnen at googlemail.com>wrote:

> Hello,
>
> I have a problem while trying to increase the width of a vtkPolyLine.
> No matter what I try, the width never seems to become bigger for
> values above 20.
>
> For values below 20, the method SetLineWidth works as expected.
>
> My question is if there is a limitation that prevents me to increase
> the width further or is there an error in my implementation.
>
> To explain my problem better I modified the PolyLine-Example.
> I added SetLineWidth for the vtkProperty of the vtkActor.
>
>
> Greetings,
>
> Stefan Köhnen
>
> Here is the code:
>
> #include <vtkVersion.h>
> #include <vtkSmartPointer.h>
> #include <vtkCellArray.h>
> #include <vtkCellData.h>
> #include <vtkDoubleArray.h>
> #include <vtkPoints.h>
> #include <vtkPolyLine.h>
> #include <vtkPolyData.h>
> #include <vtkPolyDataMapper.h>
> #include <vtkActor.h>
> #include <vtkRenderWindow.h>
> #include <vtkRenderer.h>
> #include <vtkRenderWindowInteractor.h>
> #include <vtkProperty.h>
>
> int main(int, char *[])
> {
>  // Create five points.
>  double origin[3] = {0.0, 0.0, 0.0};
>  double p0[3] = {1.0, 0.0, 0.0};
>  double p1[3] = {0.0, 1.0, 0.0};
>  double p2[3] = {0.0, 1.0, 2.0};
>  double p3[3] = {1.0, 2.0, 3.0};
>
>  // Create a vtkPoints object and store the points in it
>  vtkSmartPointer<vtkPoints> points =
>    vtkSmartPointer<vtkPoints>::New();
>  points->InsertNextPoint(origin);
>  points->InsertNextPoint(p0);
>  points->InsertNextPoint(p1);
>  points->InsertNextPoint(p2);
>  points->InsertNextPoint(p3);
>
>  vtkSmartPointer<vtkPolyLine> polyLine =
>    vtkSmartPointer<vtkPolyLine>::New();
>  polyLine->GetPointIds()->SetNumberOfIds(5);
>  for(unsigned int i = 0; i < 5; i++)
>    {
>    polyLine->GetPointIds()->SetId(i,i);
>    }
>
>  // Create a cell array to store the lines in and add the lines to it
>  vtkSmartPointer<vtkCellArray> cells =
>    vtkSmartPointer<vtkCellArray>::New();
>  cells->InsertNextCell(polyLine);
>
>  // Create a polydata to store everything in
>  vtkSmartPointer<vtkPolyData> polyData =
>    vtkSmartPointer<vtkPolyData>::New();
>
>  // Add the points to the dataset
>  polyData->SetPoints(points);
>
>  // Add the lines to the dataset
>  polyData->SetLines(cells);
>
>  // Setup actor and mapper
>  vtkSmartPointer<vtkPolyDataMapper> mapper =
>    vtkSmartPointer<vtkPolyDataMapper>::New();
> #if VTK_MAJOR_VERSION <= 5
>  mapper->SetInput(polyData);
> #else
>  mapper->SetInputData(polyData);
> #endif
>
>  vtkSmartPointer<vtkActor> actor =
>    vtkSmartPointer<vtkActor>::New();
>  actor->SetMapper(mapper);
>
>
>  ////////////////////////////////////////////////////////////////////////////
>  // Here is the explained change - Set width of line
>  actor->GetProperty()->SetLineWidth(30.0f);
>
>  ////////////////////////////////////////////////////////////////////////////
>
>
>  // Setup render window, renderer, and interactor
>  vtkSmartPointer<vtkRenderer> renderer =
>    vtkSmartPointer<vtkRenderer>::New();
>  vtkSmartPointer<vtkRenderWindow> renderWindow =
>    vtkSmartPointer<vtkRenderWindow>::New();
>  renderWindow->AddRenderer(renderer);
>  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
>    vtkSmartPointer<vtkRenderWindowInteractor>::New();
>  renderWindowInteractor->SetRenderWindow(renderWindow);
>  renderer->AddActor(actor);
>
>  renderWindow->Render();
>  renderWindowInteractor->Start();
>
>  return EXIT_SUCCESS;
> }
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>



-- 
Jothy
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20120426/cf22f47d/attachment.htm>