Make vtkContourWidget Object Work On Webassembly Page

I had found a crash bug when use vtkContourWidget by webassembly in the post Crash Bug About vtkOpenGLPolyDataMapper::UpdateShaders In vtkAbstractWidget.As we know, SetResolveCoincidentTopologyToPolygonOffset for mapper can make web page crash, related post: The Interfaces In VTK Can’t Be Used With Webassembly. After reading the source code of vtkOrientedGlyphContourRepresentation::vtkOrientedGlyphContourRepresentation(), we know Read more…

Get Normals Of Points By vtkPolyDataNormals

The post is related to The Example About vtkPolyDataNormals. If you want to use vtkPolyDataNormals to compute the normals of points, it’s better to set variable Splitting false. #include <vtkVersion.h> #include <vtkSmartPointer.h> #include <vtkSurfaceReconstructionFilter.h> #include <vtkProgrammableSource.h> #include <vtkContourFilter.h> #include <vtkReverseSense.h> #include <vtkPolyDataMapper.h> #include <vtkProperty.h> #include <vtkPolyData.h> #include <vtkCamera.h> #include <vtkRenderer.h> Read more…

Matrix Multiplication And vtkTransform Concatenate

We can use vtkTransform’s function concatenate to do matrix multiplication. There are three matrix which have the mathematical relationship.     It’s equivalent to the following code. vtkSPtrNew( C, vtkTransform ); C->Concatenate(B); C->Concatenate(A); C->Update(); The experimental code: #include <iostream> #include <vtkSmartPointer.h> #include <vtkTransform.h> #define vtkSPtr vtkSmartPointer #define vtkSPtrNew(Var, Type) vtkSPtr<Type> Read more…

3D Model Editor – Put Model To Original Position

I mainly focus on coding for software development at work. If we need some complicated 3D models, other colleagues in charge of data production will provide relevant model files. 在工作的时候,我们做软件研发主要专注于代码编写,如果需要一些复杂的3D模型的话,则要负责数据生产的同事提供相关的模型文件。 But sometimes they give us a model that’s not at the ideal position in the 3D world, and I often Read more…

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