QuadraticSurface
VTKExamples/Cxx/Visualization/QuadraticSurface
Description¶
This example demonstrates how to create and display a quadratic surface.
Code¶
QuadraticSurface.cxx
#include <vtkSmartPointer.h> #include <vtkQuadric.h> #include <vtkSampleFunction.h> #include <vtkContourFilter.h> #include <vtkActor.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkPolyDataMapper.h> int main(int, char *[]) { // Create the quadric function definition vtkSmartPointer<vtkQuadric> quadric = vtkSmartPointer<vtkQuadric>::New(); quadric->SetCoefficients(.5,1,.2,0,.1,0,0,.2,0,0); // Sample the quadric function vtkSmartPointer<vtkSampleFunction> sample = vtkSmartPointer<vtkSampleFunction>::New(); sample->SetSampleDimensions(50,50,50); sample->SetImplicitFunction(quadric); double xmin = 0, xmax=1, ymin=0, ymax=1, zmin=0, zmax=1; sample->SetModelBounds(xmin, xmax, ymin, ymax, zmin, zmax); vtkSmartPointer<vtkContourFilter> contourFilter = vtkSmartPointer<vtkContourFilter>::New(); contourFilter->SetInputConnection(sample->GetOutputPort()); contourFilter->GenerateValues(1, 1.0, 1.0); contourFilter->Update(); // Visualize vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(contourFilter->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); renderer->AddActor(actor); renderer->SetBackground(.3, .6, .3); // Background color green renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(QuadraticSurface) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(QuadraticSurface MACOSX_BUNDLE QuadraticSurface.cxx) target_link_libraries(QuadraticSurface ${VTK_LIBRARIES})
Download and Build QuadraticSurface¶
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 Some tarballs may be missing or out-of-date.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 QuadraticSurface and its CMakeLists.txt file. Once the tarball QuadraticSurface.tar has been downloaded and extracted,
cd QuadraticSurface/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:
./QuadraticSurface
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.