VTK/Examples/Cxx/Utilities/DiscretizableColorTransferFunction

DiscretizableColorTransferFunction.cxx

#include <vtkSmartPointer.h>
#include <vtkDiscretizableColorTransferFunction.h>

int main(int, char *[])
{
  vtkSmartPointer<vtkDiscretizableColorTransferFunction> discretizableColorTransferFunction = 
    vtkSmartPointer<vtkDiscretizableColorTransferFunction>::New();
  
  discretizableColorTransferFunction->DiscretizeOn();
  discretizableColorTransferFunction->SetNumberOfValues(10);
  
  discretizableColorTransferFunction->AddRGBPoint(0.0, 1, 0, 0);
  discretizableColorTransferFunction->AddRGBPoint(10.0, 0, 1, 0);
  discretizableColorTransferFunction->Build();
  
  double color[3];
  discretizableColorTransferFunction->GetColor(1.0, color);
  std::cout << color[0] << " " << color[1] << " " << color[2] << std::endl;
  
  discretizableColorTransferFunction->GetColor(5.0, color);
  std::cout << color[0] << " " << color[1] << " " << color[2] << std::endl;
  
  return EXIT_SUCCESS;
}

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CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(DiscretizableColorTransferFunction)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(DiscretizableColorTransferFunction MACOSX_BUNDLE DiscretizableColorTransferFunction.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(DiscretizableColorTransferFunction ${VTK_LIBRARIES})
else()
  target_link_libraries(DiscretizableColorTransferFunction vtkHybrid vtkWidgets)
endif()

Download and Build DiscretizableColorTransferFunction

Click here to download DiscretizableColorTransferFunction. and its CMakeLists.txt file.

Once the tarball DiscretizableColorTransferFunction.tar has been downloaded and extracted,

cd DiscretizableColorTransferFunction/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:

./DiscretizableColorTransferFunction

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.