We often use TCP and UDP connections in Internet communication. TCP (Transmission Control Protocol) is connection-oriented, it tracks all data sent. By contrast, UDP (User Datagram Protocol) doesn’t care about datagrams it sent, all information is no sequencing. In other Read more…
I wanted to install an SSL certificate for my personal website. After reading some recommends, I registered on Cloudflare, add my website, and activate the free scheme. Make it flexible to use http or https when visiting the website. I Read more…
The article describes method Tiled Rendering refers to VTKUsersGuide The class vtkRenderLargeImage breaks up the whole rendering into separated parts. The different pieces are handled and combined into a final large image. The interface SetMagnification of vtkRenderLargeImage control how much Read more…
Preparation Knowledge SSH is a very useful tool which supports to use all kinds of commands to control remote computer for developers. Before interacting with the server, users are required to login with a username and password to be certified. Read more…
The instance of vtkImporter contains vtkRenderWindow and vtkRenderer objects. It supports to recover original scene including lights, cameras, actors, etc. Here is a simple example which imports 3D studio file and shows the whole scene. import vtk DataRoot = “/Users/weiyang/Downloads/VTKData” Read more…
We often need to delete some elements in an STL set. But it causes a strange bug if we are careless sometimes. One newbie in C Plus Plus program language may write the following code to delete all odd numbers Read more…
Let’s do a simple experiment, to check the Internet connection between the user’s computer and a set of IPs by a shell script. The basic command tool is Ping which sends packets to network hosts. It will receive a network Read more…
I want to get the solution of the equation Bisection Method The first algorithm for the problem is bisection method. The algorithm bisection method doesn’t require derivation for the equation. It just needs a possible solution range [l, r], then Read more…
Driven class of unary_function can be used to check a single element based on special condition.Programmer can regard it as some algorithms’ parameter, such as count_if, find_if, and find_if_not.The following code shows how to write a customized unray class and use it. C++ struct Widget Read more…