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CombustorIsosurface

VTKEx/Cxx/VisualizationAlgorithms/CombustorIsosurface

Description¶

This example generates an isosurface of constant flow density.

Info

See Figure 6-11c in Chapter 6 the VTK Textbook.

Other languages

See (Python)

Question

If you have a simple question about this example contact us at VTKExProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

Code¶

CombustorIsosurface.cxx

#include <vtkActor.h>
#include <vtkCamera.h>
#include <vtkContourFilter.h>
#include <vtkMultiBlockDataSet.h>
#include <vtkMultiBlockPLOT3DReader.h>
#include <vtkNamedColors.h>
#include <vtkPolyDataMapper.h>
#include <vtkPolyDataNormals.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkStructuredGridOutlineFilter.h>

int main (int argc, char *argv[])
{
  if (argc < 3)
  {
    std::cout << "Usage: " << argv[0] << " combxyz.bin combq.bin" << std::endl;
    return EXIT_FAILURE;
  }
  vtkSmartPointer<vtkNamedColors> colors =
    vtkSmartPointer<vtkNamedColors>::New();

// Create the RenderWindow, Renderer and both Actors
//
  vtkSmartPointer<vtkRenderer> ren1 =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renWin =
    vtkSmartPointer<vtkRenderWindow>::New();
  renWin->AddRenderer(ren1);
  vtkSmartPointer<vtkRenderWindowInteractor> iren =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  iren->SetRenderWindow(renWin);

// create pipeline
//
  vtkSmartPointer<vtkMultiBlockPLOT3DReader> pl3d =
    vtkSmartPointer<vtkMultiBlockPLOT3DReader>::New();
  pl3d->SetXYZFileName(argv[1]);
  pl3d->SetQFileName(argv[2]);
  pl3d->SetScalarFunctionNumber(100);
  pl3d->SetVectorFunctionNumber(202);
  pl3d->Update();

  vtkSmartPointer<vtkContourFilter> iso =
    vtkSmartPointer<vtkContourFilter>::New();
  iso->SetInputData(pl3d->GetOutput()->GetBlock(0));
  iso->SetValue(0, .38);

  vtkSmartPointer<vtkPolyDataNormals> normals =
    vtkSmartPointer<vtkPolyDataNormals>::New();
  normals->SetInputConnection(iso->GetOutputPort());
  normals->SetFeatureAngle(45);

  vtkSmartPointer<vtkPolyDataMapper> isoMapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  isoMapper->SetInputConnection(normals->GetOutputPort());
  isoMapper->ScalarVisibilityOff();

  vtkSmartPointer<vtkActor> isoActor =
    vtkSmartPointer<vtkActor>::New();
  isoActor->SetMapper(isoMapper);
  isoActor->GetProperty()->SetColor(colors->GetColor3d("bisque").GetData());

  vtkSmartPointer<vtkStructuredGridOutlineFilter> outline =
    vtkSmartPointer<vtkStructuredGridOutlineFilter>::New();
  outline->SetInputConnection(pl3d->GetOutputPort());

  vtkSmartPointer<vtkPolyDataMapper> outlineMapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  outlineMapper->SetInputConnection(outline->GetOutputPort());

  vtkSmartPointer<vtkActor> outlineActor =
    vtkSmartPointer<vtkActor>::New();
  outlineActor->SetMapper(outlineMapper);

// Add the actors to the renderer, set the background and size
//
  ren1->AddActor(outlineActor);
  ren1->AddActor(isoActor);
  ren1->SetBackground(colors->GetColor3d("SlateGray").GetData());
  renWin->SetSize(640, 480);

  ren1->GetActiveCamera()->SetFocalPoint(9.71821, 0.458166, 29.3999);
  ren1->GetActiveCamera()->SetPosition(2.7439, -37.3196, 38.7167);
  ren1->GetActiveCamera()->SetViewUp(-0.16123, 0.264271, 0.950876);
  ren1->ResetCameraClippingRange();

// render the image
//
  renWin->Render();
  iren->Start();
  return EXIT_SUCCESS;
}

CMakeLists.txt¶

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(CombustorIsosurface)

find_package(VTK COMPONENTS 
  vtkvtkCommonColor
  vtkvtkCommonDataModel
  vtkvtkFiltersCore
  vtkvtkIOParallel
  vtkvtkInteractionStyle
  vtkvtkRenderingContextOpenGL2
  vtkvtkRenderingCore
  vtkvtkRenderingFreeType
  vtkvtkRenderingGL2PSOpenGL2
  vtkvtkRenderingOpenGL2 QUIET)
if (NOT VTK_FOUND)
  message("Skipping CombustorIsosurface: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(CombustorIsosurface MACOSX_BUNDLE CombustorIsosurface.cxx )
  target_link_libraries(CombustorIsosurface PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(CombustorIsosurface MACOSX_BUNDLE CombustorIsosurface.cxx )
  target_link_libraries(CombustorIsosurface PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS CombustorIsosurface
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build CombustorIsosurface¶

Click here to download CombustorIsosurface and its CMakeLists.txt file. Once the tarball CombustorIsosurface.tar has been downloaded and extracted,

cd CombustorIsosurface/build

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./CombustorIsosurface

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.