VTK/Examples/Cxx/Utilities/ColorLookupTable

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This example shows how to create a table of colors that map from a continuous range of values.

ColorLookupTable.cxx

#include <vtkSmartPointer.h>
#include <vtkLookupTable.h>
 
int main(int, char *[])
{
  vtkSmartPointer<vtkLookupTable> lookupTable = 
    vtkSmartPointer<vtkLookupTable>::New();
 
  lookupTable->SetTableRange(0.0, 10.0);
  // If you don't want to use the whole color range, you can use
  // SetValueRange, SetHueRange, and SetSaturationRange
  lookupTable->Build();
 
  double color[3];
  lookupTable->GetColor(1.0, color);
  std::cout << color[0] << " " << color[1] << " " << color[2] << std::endl;
 
  lookupTable->GetColor(5.0, color);
  std::cout << color[0] << " " << color[1] << " " << color[2] << std::endl;
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
 
PROJECT(ColorLookupTable)
 
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
 
add_executable(ColorLookupTable MACOSX_BUNDLE ColorLookupTable.cxx)
 
if(VTK_LIBRARIES)
  target_link_libraries(ColorLookupTable ${VTK_LIBRARIES})
else()
  target_link_libraries(ColorLookupTable vtkHybrid vtkWidgets)
endif()

Download and Build ColorLookupTable

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

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

cd ColorLookupTable/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:

./ColorLookupTable

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.