If two numbers are equal and the relative positions are not changed after sorting, we think the sorting algorithm is stable. Stable sort algorithm: bubble sort, insert sort and merge sort. Unstable sort algorithm: quick sort, heap sort. Introduce an unstable sort algorithm quick sort. Its core thought is divide Read more…
We often subtract mesh by other object to get the result we want. The scene looks like the following image. #include <iostream> #include <vtkSmartPointer.h> #include <vtkSphereSource.h> #include <vtkActor.h> #include <vtkConeSource.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkPolyDataMapper.h> #include <vtkRenderWindowInteractor.h> #include <vtkClipPolyData.h> #include <vtkImplicitBoolean.h> #include <vtkPlanes.h> #include <vtkDataArray.h> #include <vtkDoubleArray.h> #include <vtkProperty.h> Read more…
I want to cut the cone by two planes to remove the right-top part just as the following image. Rewrite vtkClipPolyData We can add multible clip functions for vtkClipPolyData to make it works. The files about the class multiClipPolyData had been push to GitHub, cut mesh by multiple planes. Use Read more…
Let’s describe a 3D parametric curve by the form. The value s is in [0, 1]. It is a circle when s is zero, in the other situations it represents a spiral. #include <vtkPointData.h> #include <vtkSmartPointer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkRenderer.h> #include <vtkPolyData.h> #include <vtkProperty.h> #include <vtkSphereSource.h> #include <vtkPolyDataMapper.h> Read more…
The post shows how to cut image by a plane smoothly. Header And Macros #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 <vtkProperty.h> Read more…
Waf is a build automation tool written by Python and designed to assist in the automatic compilation and installation of computer software. You can learn about it at waf tutorial.
Let’s use it to build project.
rm is a basic command line tool on Linux OS. It is efficient but can be dangerous if we use incorrectly because it can delete all files and can’t undo. The post shows a way to change its default behavior. Create Shell Script myrm Write a shell script and make Read more…
The geometry meaning of the determinant is the sign volumn value for three vectors in 3D world or a sign area value of two vectors (parallelogram) in the 2D coordinate system. For three points in the 2D world: The triangle is counterclockwise ordered if and clockwise ordered if Read more…
Here is dump log which shows the stack information. The class CBase has OpenModule and CloseModule interfaces, they can be called multible times. exe caused an Access Violation at location 00007FFA62174327 in module vtkCommonCore-8.2.dll Reading from location 0000000000000DA4. AddrPC Params 00007FFA62174327 0000000000000001 00007FFA9011F05B 0000013DF642A190 vtkCommonCore-8.2.dll!vtkCollection::DeleteElement 00007FFA62174155 0000000000000001 00007FFA622D3BFF 0000013DF6429290 vtkCommonCore-8.2.dll!vtkCollection::~vtkCollection Read more…