[vtk-developers] possible bug in vtk 7.1 - OpenGL2

[Roberto Gori]

Hi,

thx for your answer 

you are right but the result is the same.

it works using a vtkActor instead of a vtkFollower.

From: Ken Martin 
Sent: Friday, August 12, 2016 7:02 PM
To: Roberto Gori 
Cc: VTK Developers 
Subject: Re: [vtk-developers] possible bug in vtk 7.1 - OpenGL2

What happens if you remove the TextureMapToPlane? PlaneSource generates texture coordinate by default. So connect that directly to the mapper and what happens?

On Fri, Aug 12, 2016 at 12:21 PM, Roberto Gori <r.gori at cineca.it> wrote:

  Hi,

  sorry for cross-posting but no one is answering to my question on the vtkusers list.

  As you can see running this code the plane is visualized without texture.

  I think the problem is in rendering a texture on a vtkFollower. 
  Can someone open a bug on Mantis? 


  #include <vtkImageData.h>
  #include <vtkJPEGReader.h>
  #include <vtkPolyDataMapper.h>
  #include <vtkPolyData.h>
  #include <vtkSmartPointer.h>
  #include <vtkTextureMapToPlane.h>
  #include <vtkPlaneSource.h>
  #include <vtkTexture.h>
  #include <vtkRenderer.h>
  #include <vtkRenderWindow.h>
  #include <vtkRenderWindowInteractor.h>
  #include <vtkFollower.h>
  #include <vtkVersion.h>

  int main ( int argc, char *argv[] )
  {
  // Parse command line arguments
  if ( argc != 2 )
  {
  std::cerr << "Usage: " << argv[0] << " Filename" << std::endl;
  return EXIT_FAILURE;
  }

  std::cout << "VTK version:" << vtkVersion::GetVTKVersion() << std::endl;

  std::string inputFilename = argv[1];

  // Read the image which will be the texture
  vtkSmartPointer<vtkJPEGReader> jPEGReader =
  vtkSmartPointer<vtkJPEGReader>::New();
  jPEGReader->SetFileName ( inputFilename.c_str() );

  // Create a plane
  vtkSmartPointer<vtkPlaneSource> plane =
  vtkSmartPointer<vtkPlaneSource>::New();
  plane->SetCenter(0.0, 0.0, 0.0);
  plane->SetNormal(0.0, 0.0, 1.0);

  // Apply the texture
  vtkSmartPointer<vtkTexture> texture =
  vtkSmartPointer<vtkTexture>::New();
  texture->SetInputConnection(jPEGReader->GetOutputPort());

  vtkSmartPointer<vtkTextureMapToPlane> texturePlane =
  vtkSmartPointer<vtkTextureMapToPlane>::New();
  texturePlane->SetInputConnection(plane->GetOutputPort());

  vtkSmartPointer<vtkPolyDataMapper> planeMapper =
  vtkSmartPointer<vtkPolyDataMapper>::New();
  planeMapper->SetInputConnection(texturePlane->GetOutputPort());

  vtkSmartPointer<vtkFollower> texturedPlane =
  vtkSmartPointer<vtkFollower>::New();
  texturedPlane->SetMapper(planeMapper);
  texturedPlane->SetTexture(texture);


  // Visualize the textured plane
  vtkSmartPointer<vtkRenderer> renderer =
  vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(texturedPlane);

  renderer->SetBackground(.1, .2, .3); // Background color dark blue
  renderer->ResetCamera();

  texturedPlane->SetCamera(renderer->GetActiveCamera());


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

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

  renderWindow->Render();

  renderWindowInteractor->Start();

  return EXIT_SUCCESS;
  }




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