ProjectSphere
VTKExamples/Cxx/Visualization/ProjectSphere
Code
ProjectSphere.cxx
#include <vtkSmartPointer.h>
#include <vtkProjectSphereFilter.h>
#include <vtkElevationFilter.h>
#include <vtkParametricSuperEllipsoid.h>
#include <vtkParametricFunctionSource.h>
#include <vtkPolyDataMapper.h>
#include "vtkCamera.h"
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkPolyData.h>
#include <vtkPointData.h>
int main (int, char *[])
{
vtkSmartPointer<vtkParametricSuperEllipsoid> surface =
vtkSmartPointer<vtkParametricSuperEllipsoid>::New();
surface->SetN1(2.0);
surface->SetN2(0.5);
vtkSmartPointer<vtkParametricFunctionSource> source =
vtkSmartPointer<vtkParametricFunctionSource>::New();
source->SetParametricFunction(surface);
vtkSmartPointer<vtkElevationFilter> elevationFilter =
vtkSmartPointer<vtkElevationFilter>::New();
elevationFilter->SetInputConnection(source->GetOutputPort());
elevationFilter->SetLowPoint(0.0, 0.0, -4.0);
elevationFilter->SetHighPoint(0.0, 0.0, 4.0);
elevationFilter->Update();
// Deep copy the point data since in some versions of VTK,
// the ProjectSphereFilter modifies the input point data
vtkSmartPointer<vtkPolyData> pd1 =
vtkSmartPointer<vtkPolyData>::New();
pd1->DeepCopy(elevationFilter->GetOutput());
vtkSmartPointer<vtkProjectSphereFilter> sphereProject1 =
vtkSmartPointer<vtkProjectSphereFilter>::New();
sphereProject1->SetInputConnection(elevationFilter->GetOutputPort());
sphereProject1->Update();
vtkSmartPointer<vtkPolyDataMapper> mapper1 =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper1->SetInputConnection(sphereProject1->GetOutputPort());
mapper1->SetScalarRange(sphereProject1->GetOutput()->GetPointData()->GetScalars()->GetRange());
vtkSmartPointer<vtkActor> actor1 =
vtkSmartPointer<vtkActor>::New();
actor1->SetMapper(mapper1);
vtkSmartPointer<vtkPolyDataMapper> mapper2 =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper2->SetInputData(pd1);
mapper2->SetScalarRange(pd1->GetPointData()->GetScalars()->GetRange());
vtkSmartPointer<vtkActor> actor2 =
vtkSmartPointer<vtkActor>::New();
actor2->SetMapper(mapper2);
// A render window
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
// Define viewport ranges
// (xmin, ymin, xmax, ymax)
double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
// Setup both renderers
vtkSmartPointer<vtkRenderer> leftRenderer =
vtkSmartPointer<vtkRenderer>::New();
renderWindow->AddRenderer(leftRenderer);
leftRenderer->SetViewport(leftViewport);
leftRenderer->SetBackground(.6, .5, .4);
vtkSmartPointer<vtkRenderer> rightRenderer =
vtkSmartPointer<vtkRenderer>::New();
renderWindow->AddRenderer(rightRenderer);
rightRenderer->SetViewport(rightViewport);
rightRenderer->SetBackground(.4, .5, .6);
leftRenderer->AddActor(actor2);
rightRenderer->AddActor(actor1);
// An interactor
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
leftRenderer->GetActiveCamera()->Azimuth(30);
leftRenderer->GetActiveCamera()->Elevation(-30);
leftRenderer->ResetCamera();
// Render an image (lights and cameras are created automatically)
renderWindow->SetSize(640, 480);
renderWindow->Render();
// Begin mouse interaction
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ProjectSphere)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ProjectSphere MACOSX_BUNDLE ProjectSphere.cxx)
target_link_libraries(ProjectSphere ${VTK_LIBRARIES})
Download and Build ProjectSphere
Click here to download ProjectSphere and its CMakeLists.txt file. Once the tarball ProjectSphere.tar has been downloaded and extracted,
cd ProjectSphere/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:
./ProjectSphere
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.