The post introduces two topics. My explore was based on the old project from What will happen if we pass wrong vtkRenderer object for vtkPicker::Pick?. Just see the important logics about our issue at the following diff file. vector.diff: Rememder use register_vector to export vector<int> and use it in js when Read more…
. vtkCellPicker has the interface int vtkPicker::Pick(double selectionX, double selectionY, double selectionZ, vtkRenderer* renderer).In the some scenes, we can still pick the 3D actor even if pass wrong vtkRenderer object to the interface.Here is a simple example we can use to test it. We can pick the cone at some bad Read more…
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We have to announce that we will be removing all AI tools powered by OpenAI’s paid API. OpenAI’s new policy, which forcibly expires all prepaid API credits after one year, caught us by surprise. We received no prior email notifications, and this policy change was implemented months after our initial Read more…
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We had met a bug about _emscripten_set_wheel_callback_on_thread in web app based on wasm. Relative post: https://www.weiy.city/2025/02/uncaught-typeerror-cannot-read-properties-of-null-reading-onwheel-from-_emscripten_set_wheel_callback_on_thread/ Let’s explore how was the function generated in the final wasm file. The function _emscripten_set_wheel_callback_on_thread was from emscripten_set_wheel_callback_on_thread in src/library_html5.js. Read js files and html5.h under emsdk to find the called logic. Code in Read more…
There is Aborted crash on browser when I resize window. My web app is based on VTK wasm. Check uiEventHandlerFunc in Test.js: Then we can read /emsdk/upstream/emscripten/src/library_html5.js and find registerUiEventCallback and uiEventHandlerFunc on the file. There is checkInt32(e.detail) in registerUiEventCallback in exported js file Test.js which was generated from emsdk Read more…
WebAssembly’s std::thread underlying Web Workers relies on the browser, which has a strict limit on the number of Workers that can be active at the same time (usually the number of physical CPU cores, such as 4-8). Why does a two-tier loop (say 10×10) create threads that consume more resources Read more…
Here is an example about how to write stl file to wasm virtual memory and make wasm module read it. We need to add write file logic in onRuntimeInitialized for wasm module. index.html: C++ code for wasm module: binding.cpp Worker.cpp All code has been upload to GitHub: https://github.com/theArcticOcean/webLib/tree/main/threadTest