DEMReader
VTKExamples/Cxx/IO/DEMReader
Code
DEMReader.cxx
#include <vtkSmartPointer.h>
#include <vtkImageActor.h>
#include <vtkImageMapToColors.h>
#include <vtkLookupTable.h>
#include <vtkDEMReader.h>
#include <vtkImageData.h>
#include <vtkImageMapper3D.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkInteractorStyleImage.h>
#include <vtkRenderer.h>
int main(int argc, char* argv[])
{
// Verify arguments
if(argc < 2)
{
std::cerr << "Required: filename.dem" << std::endl;
return EXIT_FAILURE;
}
// Read the file
vtkSmartPointer<vtkDEMReader> reader =
vtkSmartPointer<vtkDEMReader>::New();
reader->SetFileName(argv[1]);
reader->Update();
vtkSmartPointer<vtkLookupTable> lut =
vtkSmartPointer<vtkLookupTable>::New();
lut->SetHueRange(0.6, 0);
lut->SetSaturationRange(1.0, 0);
lut->SetValueRange(0.5, 1.0);
lut->SetTableRange(reader->GetOutput()->GetScalarRange());
// Visualize
vtkSmartPointer<vtkImageMapToColors> mapColors =
vtkSmartPointer<vtkImageMapToColors>::New();
mapColors->SetLookupTable(lut);
mapColors->SetInputConnection(reader->GetOutputPort());
// Create an actor
vtkSmartPointer<vtkImageActor> actor =
vtkSmartPointer<vtkImageActor>::New();
actor->GetMapper()->SetInputConnection(mapColors->GetOutputPort());
// Setup renderer
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renderer->AddActor(actor);
renderer->ResetCamera();
// Setup render window
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
// Setup render window interactor
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
vtkSmartPointer<vtkInteractorStyleImage> style =
vtkSmartPointer<vtkInteractorStyleImage>::New();
renderWindowInteractor->SetInteractorStyle(style);
// Render and start interaction
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindowInteractor->Initialize();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(DEMReader)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(DEMReader MACOSX_BUNDLE DEMReader.cxx)
target_link_libraries(DEMReader ${VTK_LIBRARIES})
Download and Build DEMReader
Click here to download DEMReader and its CMakeLists.txt file. Once the tarball DEMReader.tar has been downloaded and extracted,
cd DEMReader/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:
./DEMReader
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.