BarChart
VTKExamples/Cxx/Plotting/BarChart
Code¶
BarChart.cxx
#include <vtkVersion.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkSmartPointer.h> #include <vtkChartXY.h> #include <vtkPlot.h> #include <vtkTable.h> #include <vtkIntArray.h> #include <vtkContextView.h> #include <vtkContextScene.h> #include <vtkRenderWindowInteractor.h> #define VTK_CREATE(type, name) \ vtkSmartPointer<type> name = vtkSmartPointer<type>::New() // Monthly circulation data static int data_2008[] = {10822, 10941, 9979, 10370, 9460, 11228, 15093, 12231, 10160, 9816, 9384, 7892}; static int data_2009[] = {9058, 9474, 9979, 9408, 8900, 11569, 14688, 12231, 10294, 9585, 8957, 8590}; static int data_2010[] = {9058, 10941, 9979, 10270, 8900, 11228, 14688, 12231, 10160, 9585, 9384, 8590}; int main(int, char*[] ) { // Set up a 2D scene, add an XY chart to it VTK_CREATE(vtkContextView, view); view->GetRenderer()->SetBackground(1.0, 1.0, 1.0); view->GetRenderWindow()->SetSize(400, 300); VTK_CREATE(vtkChartXY, chart); view->GetScene()->AddItem(chart); // Create a table with some points in it... VTK_CREATE(vtkTable, table); VTK_CREATE(vtkIntArray, arrMonth); arrMonth->SetName("Month"); table->AddColumn(arrMonth); VTK_CREATE(vtkIntArray, arr2008); arr2008->SetName("2008"); table->AddColumn(arr2008); VTK_CREATE(vtkIntArray, arr2009); arr2009->SetName("2009"); table->AddColumn(arr2009); VTK_CREATE(vtkIntArray, arr2010); arr2010->SetName("2010"); table->AddColumn(arr2010); table->SetNumberOfRows(12); for (int i = 0; i < 12; i++) { table->SetValue(i,0,i+1); table->SetValue(i,1,data_2008[i]); table->SetValue(i,2,data_2009[i]); table->SetValue(i,3,data_2010[i]); } // Add multiple line plots, setting the colors etc vtkPlot *line = 0; line = chart->AddPlot(vtkChart::BAR); #if VTK_MAJOR_VERSION <= 5 line->SetInput(table, 0, 1); #else line->SetInputData(table, 0, 1); #endif line->SetColor(0, 255, 0, 255); line = chart->AddPlot(vtkChart::BAR); #if VTK_MAJOR_VERSION <= 5 line->SetInput(table, 0, 2); #else line->SetInputData(table, 0, 2); #endif line->SetColor(255, 0, 0, 255); line = chart->AddPlot(vtkChart::BAR); #if VTK_MAJOR_VERSION <= 5 line->SetInput(table, 0, 3); #else line->SetInputData(table, 0, 3); #endif line->SetColor(0, 0, 255, 255); //Finally render the scene and compare the image to a reference image view->GetRenderWindow()->SetMultiSamples(0); view->GetInteractor()->Initialize(); view->GetInteractor()->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(BarChart) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(BarChart MACOSX_BUNDLE BarChart.cxx) target_link_libraries(BarChart ${VTK_LIBRARIES})
Download and Build BarChart¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
Click here to download BarChart and its CMakeLists.txt file. Once the tarball BarChart.tar has been downloaded and extracted,
cd BarChart/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:
./BarChart
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.