SurfacePlot

VTKExamples/Cxx/Plotting/SurfacePlot


Description

This examples creates a vtkChartXYZ that contains a vtkPlotSurface.

Other Languages

See (Python)

Question

If you have a simple question about this example contact us at VTKExamplesProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

Code

SurfacePlot.cxx

#include <vtkNew.h>
#include <vtkPlotSurface.h>

#include <vtkNamedColors.h>
#include <vtkChartXYZ.h>
#include <vtkPen.h>
#include <vtkContextMouseEvent.h>
#include <vtkContextView.h>
#include <vtkContextScene.h>
#include <vtkFloatArray.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkTable.h>
#include <vtkRegressionTestImage.h>
#include <vtkUnsignedCharArray.h>
#include <vtkVector.h>

int main(int , char * [])
{
  vtkNew<vtkNamedColors> colors;

  vtkNew<vtkChartXYZ> chart;
  chart->SetGeometry(vtkRectf(10.0, 10.0, 630, 470));

  vtkNew<vtkPlotSurface> plot;

  vtkNew<vtkContextView> view;
  view->GetRenderer()->SetBackground(colors->GetColor3d("Silver").GetData());
  view->GetRenderWindow()->SetSize(640, 480);
  view->GetScene()->AddItem(chart);

  // Create a surface
  vtkNew<vtkTable> table;
  vtkIdType numPoints = 70;
  float inc = 9.424778 / (numPoints - 1);
  for (vtkIdType i = 0; i < numPoints; ++i)
  {
    vtkNew<vtkFloatArray> arr;
    table->AddColumn(arr);
  }

  table->SetNumberOfRows(static_cast<vtkIdType>(numPoints));
  for (vtkIdType i = 0; i < numPoints; ++i)
  {
    float x = i * inc;
    for (vtkIdType j = 0; j < numPoints; ++j)
    {
      float y  = j * inc;
      table->SetValue(i, j, sin(sqrt(x*x + y*y)));
    }
  }

  // Set up the surface plot we wish to visualize and add it to the chart.
  plot->SetXRange(0, 10.0);
  plot->SetYRange(0, 10.0);
  plot->SetInputData(table);
  plot->GetPen()->SetColorF(colors->GetColor3d("Tomato").GetData());
  chart->AddPlot(plot);

  view->GetRenderWindow()->SetMultiSamples(0);
  view->GetInteractor()->Initialize();
  view->GetRenderWindow()->Render();

  // rotate
  vtkContextMouseEvent mouseEvent;
  mouseEvent.SetInteractor(view->GetInteractor());

  vtkVector2i pos;

  vtkVector2i lastPos;
  mouseEvent.SetButton(vtkContextMouseEvent::LEFT_BUTTON);
  lastPos.Set(100, 50);
  mouseEvent.SetLastScreenPos(lastPos);
  pos.Set(150, 100);
  mouseEvent.SetScreenPos(pos);

  vtkVector2d sP(pos.Cast<double>().GetData());
  vtkVector2d lSP(lastPos.Cast<double>().GetData());
  vtkVector2d screenPos(mouseEvent.GetScreenPos().Cast<double>().GetData());
  vtkVector2d lastScreenPos(mouseEvent.GetLastScreenPos().Cast<double>().GetData());

  chart->MouseMoveEvent(mouseEvent);

  view->GetInteractor()->Start();

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(SurfacePlot)

find_package(VTK COMPONENTS 
  vtkChartsCore
  vtkCommonColor
  vtkCommonCore
  vtkCommonDataModel
  vtkInteractionStyle
  vtkRenderingContext2D
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingOpenGL2
  vtkTestingRendering
  vtkViewsContext2D QUIET)
if (NOT VTK_FOUND)
  message("Skipping SurfacePlot: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(SurfacePlot MACOSX_BUNDLE SurfacePlot.cxx )
  target_link_libraries(SurfacePlot PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(SurfacePlot MACOSX_BUNDLE SurfacePlot.cxx )
  target_link_libraries(SurfacePlot PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS SurfacePlot
    MODULES ${VTK_LIBRARIES}
    )
endif () 

Download and Build SurfacePlot

Click here to download SurfacePlot and its CMakeLists.txt file. Once the tarball SurfacePlot.tar has been downloaded and extracted,

cd SurfacePlot/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:

./SurfacePlot

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.