void vtkDataMesh::createThumbnails()
{
vtkPointSet * mesh = vtkPointSet::SafeDownCast(d->mesh->GetDataSet());
unsigned int w=128, h=128;
QImage img(w, h, QImage::Format_RGB32);
img.fill(0);
vtkSmartPointer <vtkDataSetSurfaceFilter> geometryextractor = vtkDataSetSurfaceFilter::New();
vtkSmartPointer <vtkPolyDataMapper> mapper = vtkPolyDataMapper::New();
vtkSmartPointer <vtkActor> actor = vtkActor::New();
vtkSmartPointer <vtkProperty> prop = vtkProperty::New();
vtkSmartPointer <vtkRenderer> renderer = vtkRenderer::New();
vtkSmartPointer <vtkRenderWindow> window = vtkRenderWindow::New();
//ugly trick of doom to have no popups
QVTKWidget widget;
widget.resize(w,h);
geometryextractor->SetInput (mesh);
mapper->SetInput (geometryextractor->GetOutput());
actor->SetMapper (mapper);
actor->SetProperty (prop);
renderer->AddViewProp(actor);
window->SetSize (w,h);
window->SetOffScreenRendering(1);
window->AddRenderer (renderer);
renderer->ResetCamera();
widget.SetRenderWindow(window);
window->Render();
vtkSmartPointer <vtkUnsignedCharArray> pixels = vtkUnsignedCharArray::New();
pixels->SetArray(img.bits(), w*h*4, 1);
window->GetRGBACharPixelData(0, 0, w-1, h-1, 1, pixels);
d->thumbnails.push_back (img);
}
int main(int argc, char** argv)
{
QApplication app(argc, argv);
QVTKWidget widget;
widget.resize(256,256);
// Setup sphere
vtkSmartPointer<vtkSphereSource> sphereSource =
vtkSmartPointer<vtkSphereSource>::New();
sphereSource->Update();
vtkSmartPointer<vtkPolyDataMapper> sphereMapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
vtkSmartPointer<vtkActor> sphereActor =
vtkSmartPointer<vtkActor>::New();
sphereActor->SetMapper(sphereMapper);
// Setup window
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
// Setup renderer
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renderWindow->AddRenderer(renderer);
renderer->AddActor(sphereActor);
renderer->ResetCamera();
widget.SetRenderWindow(renderWindow);
widget.show();
app.exec();
return EXIT_SUCCESS;
}
int main(int argc, char** argv) {
QApplication app(argc, argv);
Tr tr; // 3D-Delaunay triangulation
C2t3 c2t3 (tr); // 2D-complex in 3D-Delaunay triangulation
// the 'function' is a 3D gray level image
Gray_level_image image("../../../examples/Surface_mesher/data/skull_2.9.inr", 2.9);
// Carefully choosen bounding sphere: the center must be inside the
// surface defined by 'image' and the radius must be high enough so that
// the sphere actually bounds the whole image.
GT::Point_3 bounding_sphere_center(122., 102., 117.);
GT::FT bounding_sphere_squared_radius = 200.*200.*2.;
GT::Sphere_3 bounding_sphere(bounding_sphere_center,
bounding_sphere_squared_radius);
// definition of the surface, with 10^-2 as relative precision
Surface_3 surface(image, bounding_sphere, 1e-5);
// defining meshing criteria
CGAL::Surface_mesh_default_criteria_3<Tr> criteria(30.,
5.,
1.);
// meshing surface, with the "manifold without boundary" algorithm
CGAL::make_surface_mesh(c2t3, surface, criteria, CGAL::Manifold_tag());
QVTKWidget widget;
widget.resize(256,256);
// vtkImageData* vtk_image = CGAL::vtk_image_sharing_same_data_pointer(image);
vtkRenderer *aRenderer = vtkRenderer::New();
vtkRenderWindow *renWin = vtkRenderWindow::New();
renWin->AddRenderer(aRenderer);
widget.SetRenderWindow(renWin);
// vtkContourFilter *skinExtractor = vtkContourFilter::New();
// skinExtractor->SetInput(vtk_image);
// skinExtractor->SetValue(0, isovalue);
// skinExtractor->SetComputeNormals(0);
vtkPolyDataNormals *skinNormals = vtkPolyDataNormals::New();
// skinNormals->SetInputConnection(skinExtractor->GetOutputPort());
vtkPolyData* polydata = CGAL::output_c2t3_to_vtk_polydata(c2t3);
skinNormals->SetInput(polydata);
skinNormals->SetFeatureAngle(60.0);
vtkPolyDataMapper *skinMapper = vtkPolyDataMapper::New();
// skinMapper->SetInputConnection(skinExtractor->GetOutputPort());
skinMapper->SetInput(polydata);
skinMapper->ScalarVisibilityOff();
vtkActor *skin = vtkActor::New();
skin->SetMapper(skinMapper);
// An outline provides context around the data.
//
// vtkOutlineFilter *outlineData = vtkOutlineFilter::New();
// outlineData->SetInput(vtk_image);
// vtkPolyDataMapper *mapOutline = vtkPolyDataMapper::New();
// mapOutline->SetInputConnection(outlineData->GetOutputPort());
// vtkActor *outline = vtkActor::New();
// outline->SetMapper(mapOutline);
// outline->GetProperty()->SetColor(0,0,0);
// It is convenient to create an initial view of the data. The FocalPoint
// and Position form a vector direction. Later on (ResetCamera() method)
// this vector is used to position the camera to look at the data in
// this direction.
vtkCamera *aCamera = vtkCamera::New();
aCamera->SetViewUp (0, 0, -1);
aCamera->SetPosition (0, 1, 0);
aCamera->SetFocalPoint (0, 0, 0);
aCamera->ComputeViewPlaneNormal();
// Actors are added to the renderer. An initial camera view is created.
// The Dolly() method moves the camera towards the FocalPoint,
// thereby enlarging the image.
// aRenderer->AddActor(outline);
aRenderer->AddActor(skin);
aRenderer->SetActiveCamera(aCamera);
aRenderer->ResetCamera ();
aCamera->Dolly(1.5);
// Set a background color for the renderer and set the size of the
// render window (expressed in pixels).
aRenderer->SetBackground(1,1,1);
renWin->SetSize(640, 480);
// Note that when camera movement occurs (as it does in the Dolly()
// method), the clipping planes often need adjusting. Clipping planes
// consist of two planes: near and far along the view direction. The
// near plane clips out objects in front of the plane; the far plane
// clips out objects behind the plane. This way only what is drawn
// between the planes is actually rendered.
aRenderer->ResetCameraClippingRange ();
// Initialize the event loop and then start it.
// iren->Initialize();
// iren->Start();
// It is important to delete all objects created previously to prevent
// memory leaks. In this case, since the program is on its way to
// exiting, it is not so important. But in applications it is
// essential.
// vtk_image->Delete();
// skinExtractor->Delete();
skinNormals->Delete();
skinMapper->Delete();
skin->Delete();
// outlineData->Delete();
// mapOutline->Delete();
// outline->Delete();
aCamera->Delete();
// iren->Delete();
renWin->Delete();
aRenderer->Delete();
polydata->Delete();
widget.show();
app.exec();
return 0;
}
int main(int argc, char** argv)
{
QApplication app(argc, argv);
if(argc != 3)
usage_and_exit(argv[0]);
QVTKWidget widget;
widget.resize(256,256);
#if QT_VERSION < 0x040000
app.setMainWidget(&widget);
#endif
CGAL::Image_3 image;
if(!image.read(argv[1]))
{
std::cerr << "Cannot read image file \"" << argv[1] << "\"!\n";
usage_and_exit(argv[0]);
}
std::stringstream argv2;
argv2 << argv[2];
double isovalue;
if(!(argv2 >> isovalue))
{
std::cerr << "Invalid iso-value \"" << argv[2] << "\"!\n";
usage_and_exit(argv[0]);
}
vtkImageData* vtk_image = CGAL::vtk_image_sharing_same_data_pointer(image);
vtkRenderer *aRenderer = vtkRenderer::New();
vtkRenderWindow *renWin = vtkRenderWindow::New();
renWin->AddRenderer(aRenderer);
widget.SetRenderWindow(renWin);
vtkContourFilter *skinExtractor = vtkContourFilter::New();
skinExtractor->SetInputData(vtk_image);
skinExtractor->SetValue(0, isovalue);
// skinExtractor->SetComputeNormals(0);
vtkPolyDataNormals *skinNormals = vtkPolyDataNormals::New();
skinNormals->SetInputConnection(skinExtractor->GetOutputPort());
skinNormals->SetFeatureAngle(60.0);
vtkPolyDataMapper *skinMapper = vtkPolyDataMapper::New();
skinMapper->SetInputConnection(skinExtractor->GetOutputPort());
skinMapper->ScalarVisibilityOff();
vtkActor *skin = vtkActor::New();
skin->SetMapper(skinMapper);
// An outline provides context around the data.
//
vtkOutlineFilter *outlineData = vtkOutlineFilter::New();
outlineData->SetInputData(vtk_image);
vtkPolyDataMapper *mapOutline = vtkPolyDataMapper::New();
mapOutline->SetInputConnection(outlineData->GetOutputPort());
vtkActor *outline = vtkActor::New();
outline->SetMapper(mapOutline);
outline->GetProperty()->SetColor(0,0,0);
// It is convenient to create an initial view of the data. The FocalPoint
// and Position form a vector direction. Later on (ResetCamera() method)
// this vector is used to position the camera to look at the data in
// this direction.
vtkCamera *aCamera = vtkCamera::New();
aCamera->SetViewUp (0, 0, -1);
aCamera->SetPosition (0, 1, 0);
aCamera->SetFocalPoint (0, 0, 0);
aCamera->ComputeViewPlaneNormal();
// Actors are added to the renderer. An initial camera view is created.
// The Dolly() method moves the camera towards the FocalPoint,
// thereby enlarging the image.
aRenderer->AddActor(outline);
aRenderer->AddActor(skin);
aRenderer->SetActiveCamera(aCamera);
aRenderer->ResetCamera ();
aCamera->Dolly(1.5);
// Set a background color for the renderer and set the size of the
// render window (expressed in pixels).
aRenderer->SetBackground(1,1,1);
renWin->SetSize(640, 480);
// Note that when camera movement occurs (as it does in the Dolly()
// method), the clipping planes often need adjusting. Clipping planes
// consist of two planes: near and far along the view direction. The
// near plane clips out objects in front of the plane; the far plane
// clips out objects behind the plane. This way only what is drawn
// between the planes is actually rendered.
aRenderer->ResetCameraClippingRange ();
// Initialize the event loop and then start it.
// iren->Initialize();
// iren->Start();
// It is important to delete all objects created previously to prevent
// memory leaks. In this case, since the program is on its way to
// exiting, it is not so important. But in applications it is
// essential.
vtk_image->Delete();
skinExtractor->Delete();
skinNormals->Delete();
skinMapper->Delete();
skin->Delete();
outlineData->Delete();
mapOutline->Delete();
outline->Delete();
aCamera->Delete();
// iren->Delete();
renWin->Delete();
aRenderer->Delete();
widget.show();
app.exec();
return 0;
}