The post shows how to pass array from javascript to cpp function as parameter and how to use javascript to receive array from cpp function. We have to know the javascript TypedArray objects and different types of emscripten memory model firstly. JS TypedArray objects Type Value Range Size in bytes Read more…
I can’t display vtkContourWidget object on web page by wasm file.The following code snippet is very simple, create a circle and show it, we can modify it by vtkContourWidget object.The example works in CPlusCPlus program.VTK version: 9.0.2. But it will crash on our web page. Output: It seems something wrong Read more…
In graphics and signal processing, there are many filters to compute data. We show two signal processing filters Gaussian filter and tent filter at our web tool 3D Model Editor. Gaussian Filter The resulting function is The 2D Gaussian filter, which is both separable and radially symmetric. Tent Read more…
You may have encountered a situation where the downloaded file was damaged and didn’t open smoothly. The method to verify whether the file has changed is the information summary algorithm. It analyzes the contents of the file and generates a hash string. Compare your file hash value with someone else’s Read more…
Download cryptography library and build for wasm Download cryptography source code at GitHub, cryptopp. Go to cryptopp folder which contains GNUmakefile. Build it to generate C++ library and execute file. make static dynamic cryptest.exe Create a new folder build and move all generated files into it. mv *.o *.so *.a Read more…
Change Default Root Directory In React Project We will get a default root directory in the html file to access after run npm run build. For example, there is <script src=”/static/js/2.665e3ec0.chunk.js”> in index.html. How to change the default root direction ? We can configure our react project. Add this line Read more…
The web page for Images To MP4:https://www.weiy.city/image-processing/images-to-mp4/ We created python scripts. When a user uploads a picture ZIP file, a video compression package is generated. Read the pictures and convert it to the same size. Write to a new video file and compress it. Create a new web page to Read more…
3D Model Editor – Linear Transform Tester There are many magical properties in matrix computation, such as: AB != BA A != 0, B != 0, but maybe AB = 0. AB = AC, A != 0, but we can’t get that B = C. People couldn’t understand why it Read more…
The eigenvector of a linear transformation doesn’t change in the transformation, and the scale of this vector under the transformation is called the eigenvalue. Practice We use 3D Model Editor to perform the following linear transformation: For more information on how to use the web app 3D Model Editor to Read more…