Tool
Git Merge Another Branch
git merge – master – dev – master merge dev git merge another branch.xmind
Qt
Configure Qt-5.15.1 Environment For VTK
I had built VTK-8.1.1 and Qt5.12.1. After installing pyqt, I wrote a simple project and run it, the error message showed that it needs the newer version of Qt 5.15. So I download Qt-5.15.1 from https://download.qt.io/archive/qt , build it, and install all libraries. I didn’t find QtCreator app, therefore I Read more…
VTK
VTK – Find Connected Lists And Sort All Points In Them
Create two half spheres and save them in a vtp file by ParaView. We will use it to explore an algorithm that finds the two separated cut list and sort all points in every list. The original scene is like the following images. Use vtkCutter to create cut lines that Read more…
VTK
Adjust Camera To Focus On Small Region
I want to change the camera’s position and focal point to focus on a small region on the surface of the sphere. The parameters viewUp direction, focal point, position, and parallel scale are important for our target. Our scene comes from a previous article VTK – Find Partial Region And Read more…
VTK
Use Local Coordinate System And Show It
How to create a local coordinate system and show it? We define the local coordinate system has its own x-axis, y-axis, z-axis, and origin. We call the left coordinate system L1 and the right coordinate system L2. Regard L1 as the world coordinate system in VTK, the other one L2 Read more…
VTK
Use vtkButtonWidget To Create 2D Button
We can use vtkButtonWidget to create 2D buttons in the render window. The vtkWidgetRepresentation object controls the button’s position and show button pictures. Write our class ButtonCallBack that inherits vtkCommand and use it to listen for vtkCommand::StateChangedEvent, then we can add our button click function in it. Finally, the widget Read more…
Algorithm
VTK – Find Partial Region And Its Normal
Find a local partial region on the surface of the sphere, mark it by red color. Finally, we will compute the normal of the partial region and show it by a green line. The whole scene is just like the following image. Here are a few steps about the process. Read more…
VTK
VTK – Stretch The Boundary And Fill The Hole
Create a sphere and clip it as the following image. We will pull down the boundary and close the opening to get a new model. How to pull down the boundary of the hemispheres? Step 1. Find all independent edges which are used by only one cell. Step 2. Connect Read more…
CPlusPlus
How To Write And Read XML File By Qt
The Extensible Markup Language(XML) can be read by humans and machines, it requires all markups must be paired and case sensitive. The article shows how to write and read the XML file in the Qt environment. Write Data To The Local XML File Create a DOM element by QDomDocument object Read more…