We create a cone and a sphere individually, then combine the cone and the sphere, show it in the middle renderer. #define vtkSPtr vtkSmartPointer #define vtkSPtrNew(Var, Type) vtkSPtr<Type> Var = vtkSPtr<Type>::New(); unsigned char inval = 255; unsigned char outval = 0; double spacingVal = 0.5; vtkSPtr<vtkImageData> ConvertPolydataToImage(vtkPolyData *polydata) { double Read more…
convert polydata to image data #include <vtkVersion.h> #include <vtkImageData.h> #include <vtkImageMapper3D.h> #include <vtkImageStencil.h> #include <vtkImageStencilData.h> #include <vtkImageToImageStencil.h> #include <vtkJPEGReader.h> #include <vtkPointData.h> #include <vtkSmartPointer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyleImage.h> #include <vtkRenderer.h> #include <vtkImageActor.h> #include <vtkPolyDataToImageStencil.h> #include <vtkPolyData.h> #include <vtkSTLReader.h> #include <vtkImageProperty.h> #include <vtkSphereSource.h> #define vSP vtkSmartPointer #define vSPNew(Var, Type) vSP<Type> Read more…
The article shows a way to enlarge a plane and keep its original position, scale it and translate it back. #include <iostream> #include <vtkSmartPointer.h> #include <vtkProperty.h> #include <vtkPolyData.h> #include <vtkTriangleFilter.h> #include <vtkRegularPolygonSource.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyleTrackballCamera.h> #include <vtkCamera.h> #include <vtkNamedColors.h> #include <vtkImageActor.h> Read more…
The following code comes from vtkFollower, we used it to make the original axes always face the camera. #include <iostream> #include <vtkSmartPointer.h> #include <vtkProperty.h> #include <vtkPolyData.h> #include <vtkTriangleFilter.h> #include <vtkRegularPolygonSource.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkInteractorStyleTrackballCamera.h> #include <vtkCamera.h> #include <vtkNamedColors.h> #include <vtkImageActor.h> #include <vtkImageViewer2.h> Read more…
The algorithm vtkOBBTree::ComputeOBB can help us to calculate the three axes defining the orientation of the OBB(oriented bounding box). It is very useful for us to get the model’s spatial features. #include <iostream> #include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkActor.h> #include <vtkConeSource.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkPolyDataMapper.h> #include <vtkProperty.h> #include Read more…
Explore what will happen when we use delete on vtkSmartPointer<vtkActor> object. vtkSmartPointer<vtkActor> leftActor = vtkSmartPointer<vtkActor>::New(); leftActor->SetMapper( mapper ); //… void *ptr = leftActor.Get(); leftActor->GetProperty()->SetColor( 1, 0, 0 ); rightActor->GetProperty()->SetColor( 0, 1, 0 ); leftActor->Delete(); cout << “leftActor: ” << (void *)leftActor.Get() << endl; cout << “leftActor reference count: ” << Read more…
Use Transform We have both points on the image, the distance weight on the x-axis between the two points is 1. What is the distance weight on the vector (p1−p2) between the two points? It’s easy to calculate the result because we know Pythagorean theorem and the special direction is Read more…
I don’t know the difference between center and origin in vtkPlane when I use it in my project for the first time. I thought the center of the plane is its origin until today, it’s the reason why I could not get a correct rectangle when I tried to set Read more…
The library OpenCTM can be used to compress 3D data files. The new compressed file has only about 1/10 size compared with the original file. We can use vertex property to store the model’s color which is often PointData’s scalar in VTK. The following code snippet shows how to use Read more…