StephenWei – Page 41

VTK

Open File By Browser & Set Mouse Position By VTK

Open File By Browser The FileReader object lets web applications asynchronously read the contents of file. You can feel the effect at: https://www.weiy.city/web-test/open-file/ <!doctype html> <html lang=”en”> <head> <title>Test</title> </head> <body> <input type=”file” id=”file-input” /> <h3>Contents of the file:</h3> <pre id=”file-content”></pre> <script> function displayContents(contents) { var element = document.getElementById(‘file-content’); element.textContent Read more…

By StephenWei, 3 years ago

VTK

VTK – Calculate Distance Between Two 3D Models

The post shows a way to calculate unsigned distance Between Two 3D Models. The models can’t have too low resolution because the result that vtkDistancePolyDataFilter computes will not be accurate. #include <vtkActor.h> #include <vtkCleanPolyData.h> #include <vtkDistancePolyDataFilter.h> #include <vtkNamedColors.h> #include <vtkNew.h> #include <vtkPointData.h> #include <vtkPolyDataMapper.h> #include <vtkPolyDataReader.h> #include <vtkProperty.h> #include <vtkRenderWindow.h> Read more…

By StephenWei, 3 years ago

Web

Render Target Element By MathJax In Time

The math formula can be rendered successfully if the relative code had been written when load HTML page. Example: jsbin.com But it would fail if we change math formula code after loaded page sometimes. So we need to update the target html elements manually. Note: if you can’t access the Read more…

By StephenWei, 3 years3 years ago

Web

Export CPlusPlus Algorithm To Javascript Code

I will show a way to export CPlusPlus algorithm to javascript code. Write Pollard’s rho algorithm in class Resolver for integer factorization. resolver.h #include <string> typedef long long LL; class Resolver { public: Resolver(); ~Resolver(); std::string GetResolvedResult(int x); protected: void find(LL n,LL c); bool Miller_rabin(LL p); LL Pollard_rho(LL n,LL c); Read more…

By StephenWei, 3 years ago

Web

HTML: Render Math Formula By MathJax

We will render math Formula in browser by Js engine MathJax. Download the mathjax package to host it from our own server. git clone https://github.com/mathjax/MathJax.git mj-tmp mv mj-tmp/es5 <path-to-server-location>/mathjax rm -rf mj-tmp Write a JS file which import mathjax to analyze string which contains latex math code. check-for-tex.js: (function () Read more…

By StephenWei, 3 years ago

Web

Call C Function In Javascript Code With WebAssembly

Create a file GetPrimers.c which has a simple math function. #include <stdio.h> // export the function. #ifdef __EMSCRIPTEN__ #include <emscripten.h> EMSCRIPTEN_KEEPALIVE #endif int compute( int a, int b ) { int ans = 1; for( int i = 0; i < b; ++i ) { ans = ans * a; Read more…

By StephenWei, 3 years3 years ago

VTK

Make Interpolation Spline Curve Smoother ||

I found a new way to make interpolation spline curve smoother. Let’s explore it based on the previous post, VTK – Make Interpolation Spline Curve Smoother. Take every point and its neighbor points on the curve, generate two vectors and . Make the second point B to be the midpoint Read more…

By StephenWei, 3 years3 years ago

VTK

VTK: Show Display Bounding Box Of Mesh

I have two old posts about draw display bounding box, VTK: Show Display Bounds After Project Points and VTK: Show Display Bounds. But they didn’t give me a statisfy result.In this post, I find feature edges of the mesh firstly, convert the world points to display points by vtkViewport object. Read more…

By StephenWei, 3 years3 years ago

Tool

Path Option And Soft Mode For Git Reset

git reset <pathspec> is the opposite of git add <pathspec>. git reset [<commit>] resets the index but not the working tree (i.e., the changed files are preserved but not marked for commit) and reports what has not been updated. The command git reset <pathspec> will change the index information but Read more…

By StephenWei, 3 years ago