VTK/Examples/Cxx/Utilities/FunctionParser

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This example shows how to substitute values and evaluate a string such as "a+b".

FunctionParser.cxx

#include <vtkSmartPointer.h>
#include <vtkFunctionParser.h>
 
 
int main(int, char *[])
{
  vtkSmartPointer<vtkFunctionParser> functionParser = 
      vtkSmartPointer<vtkFunctionParser>::New();
  functionParser->SetFunction("a+b");
 
  functionParser->SetScalarVariableValue( "a", 2);
  functionParser->SetScalarVariableValue( "b", 3);
 
  double result = functionParser->GetScalarResult();
 
  std::cout << "result: " << result << std::endl;
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.6)
 
PROJECT(FunctionParser)
 
FIND_PACKAGE(VTK REQUIRED)
INCLUDE(${VTK_USE_FILE})
 
ADD_EXECUTABLE(FunctionParser FunctionParser.cxx)
TARGET_LINK_LIBRARIES(FunctionParser vtkHybrid)
Retrieved from "http://www.vtk.org/Wiki/VTK/Examples/Cxx/Utilities/FunctionParser"
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