Create a sphere and use a plane to cut it to generate a big hole. This is our test data. Then we will fill the hole by inserting a center point of the boundary and creating new triangle cells to form a new surface. We will use ConnectedEdgeFilter.hpp to handles Read more…
The post demonstrates the process of configuring the 3D window after switching from the original canvas to another. After clicking on the update button at the bottom-left position on the webpage, we will call Worker::ChangeRenderWindow to handle the scene. index.html: The interface in worker.cpp: The whole project had been uploaded Read more…
Here is a simple example about how to use VTK to listen for window resize event on web page. As we knew, we can build the VTK CPlusPlus project to wasm to run on browser. If we want to do something when browser change window size, we have to add Read more…
Sometimes you can’t pick object accurately by vtkCellPicker even through you had set tolerance very small, then you can use vtkPropPicker if not care about the details of picked position. vtkPropPicker uses hardware picking to determine the instance of vtk- Prop that was picked, as well as the pick position Read more…
Rotate a cube and move it. Replay the event by shortcut key in the following simple example. We will start by decomposing the matrix into a rotation matrix and a translation matrix, then perform linear interpolation, and finally calculate a new matrix based on the number of steps. main.cpp CustomIteractorStyle.h Read more…
Uniform Cubic Spline To Smooth Segments Change input points and use the Cubic piecewise function introduced in Basic functions for B-Spline to create smooth curve. The left renderer shows polygon lines through original points, and the right one is the smooth curve generated by algorithm. Cardinal Spline To Smooth Segments Read more…
Uniform Cubic Spline Piecewise function: The cubic spline graph: Test code: #include <vtkActor.h> #include <vtkCleanPolyData.h> #include <vtkDistancePolyDataFilter.h> #include <vtkNamedColors.h> #include <vtkNew.h> #include <vtkPointData.h> #include <vtkPolyDataMapper.h> #include <vtkPolyDataReader.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkScalarBarActor.h> #include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkSTLReader.h> #include <vtkTransform.h> #include <vtkMatrix4x4.h> #include <vector> #include Read more…
Bézier Curves Bézier curves are a type of parametric curve that is widely used in computer graphics, computer-aided design, and various other fields for creating smooth, elegant curves. They are named after the French engineer Pierre Bézier, who developed the mathematics behind these curves while working at Renault in the Read more…
ViewTransform stores three vectors in the first three rows and position information in the forth column. We can rotate camera around view up direction [ Azimuth operation ] and horizontal line (sideway) [ Elevation operation ] easily. The relative implementation details in VTK: