std::unique_copy is an algorithm which can be used to copy elements without duplicating objects in adjacent locations. template< class InputIt, class OutputIt > OutputIt uniquecopy( InputIt first, InputIt last, OutputIt dfirst ); Usage example: C++ #include #include #include #include int main() { std::string s1 = “This is a story about Read more…
I write a article about how to create a local coordinate system for a dependent 3d model, LOCAL COORDINATE SYSTEM We can real value in world coordinate system of vector or point on 3D model. For example, I want to know unit vector on model’s X axis or point’s coordinate Read more…
We want to know the world coordinate of a point on a 3D widget event though we don’t know the widget’s position on the world coordinate system. I get a matrix from an actor and create a temporal vtkTransform object, then the function TransformDoublePoint can give me the real coordinate Read more…
vtkRandomGraphSource can be used to create a random graph which includes points and edges. vtkGraphLayoutView is a vtkRenderView which has its own renderer and iterator, we can use it to display graph view. from vtk import * # create a random graph source = vtkRandomGraphSource() source.SetNumberOfVertices(100) source.SetNumberOfEdges(110) source.StartWithTreeOn() #create a Read more…
I often use the function AddInputData or AddInputConnection of vtkAppendPolydata that inherits vtkDataObjectAlgorithm to add multiple polydatas form a big one. That’s a very easy way to combine a few of different polydatas to only one. But I found that it can give me a strange result if I use Read more…
The introduction of Just-in-Time (JIT) debugger tool drmingw： https://vroby.ddns.net/Public/sdlBasic/MinGW/doc/drmingw/drmingw.html It’s very easy to install this tool. We can download from the internet and unzip it: It’s necessary to put the directory of the tool bin in the environment variable Path on windows OS. After that, we can run drmingw.exe by Read more…
Environment: macOS Mojave 10.14 Qt Creator 4.41 Qt 5.9.2 Clang 7.0 apple, 64 bits VTK 8.1.1 Our project shows: Add 3D model in VTK widget means we need to intergrate VTK and Qt development environment. Here are a few notes about it. I put a cone in QVTKOpenGLWidget, and there Read more…
We can use qmake to configure a project for different platforms after reading qt document, Qt 5 > qmake manual > Getting Started. The qmake syntax: macx{ message(“compile for mac os x”) ICON = Images/logo.icns } win32{ message(“compile for windows”) RC_ICONS = Images/logo.ico } Similarly, we can read the target Read more…
For Unix system, we always use the command make install to put executables or existing files in the right directory. Cmake uses different variables to identify targets which will be installed. Target Variable executables RUNTIME dynamic link libraries LIBRARY static link libraries ARCHIVE macosx_bundle BUNDLE For install results of building project, relevant Read more…