Category: Zero Sum

Elon Musk / Negative Energy / Positive Energy / The Great Beyond / Zero Sum

09/13/2024

A Twitter

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Using OpenGL to render a texture in a custom QQuickItem, the texture appears incomplete in the QML window
02/23/2025 by shanw
I want the picture to be fully displayed in the window. I render my own image by inheriting QQuickItem and using OPenGL. As in the QT case https://doc.qt.io/qt-6.5/qtquick-scenegraph-openglunderqml-example.html. I suspect this may have something to do with the vertex coordinates, which cause the texture to be obscured by other elements […]
Perspective Projection Not Working Properly OpenGL C++
02/23/2025 by arudhraChandrasekaran
I am trying to render a 3D cude on the window and observe the perspective projection. In the vertex shader when I dont multiply the projection matrix, the cube gets rendered (but you cant observe the perspective projection). When I multiply the perspective projection matrix the cube seems to be […]
Trouble with understanding std::views::filter -> Lazy Evaluation
02/22/2025 by rmoss3475
auto ResultView { std::views::iota(1,30) | std::views::take(20) | std::views::filter([](int x){ return x%2!=0; }) }; std::cout
How can I reload configure of fluent-bit program with C API in runtime?
02/22/2025 by Hosetsu
My problem is that I do not know how to properly change the fluent-bit configuration in my c++ application during program execution. I use two plugins: tail and lib. There is a need to change the readable files for the tail plugin at any time. The configuration yaml file looks […]
Why is this C++ code much slower than Rust?
02/22/2025 by RainingChain
I created two identical programs (one in Rust and one in C++). They are single threaded, and there are no heap allocations. The rust version (cargo run --release) runs in 12 sec. The C++ version (compiled with MSVC /O2 Release or gcc) runs in 17 sec. Profile guided optimization didn't […]
Is using ODBC {CALL} to a SQL Server stored-procedure safe from SQL injection?
02/22/2025 by xwellg
I am responsible for securing an old Windows C++ project. It uses the MFC ODBC CDatabase class to interface with SQL-Server. All DB query and insert operations are done using parameterized stored-procedures, so it seems like good practice. But almost all the DB C++ code prepares statements in this form: […]
How to call a function from hpp and cpp files in main.cpp? [closed]
02/22/2025 by Hawkeye
I'm a newbie in C++. I'm trying to write a function with string arguments in another .cpp file, and then call this function in main.cpp via an .hpp file. If I run with int, it works, but with string it does not, and I get a lot of errors. If […]
when the C++ compiler shall check for template correctness?
02/22/2025 by Adhémar Patamob
The following template code is buggy as std::array has no operator() : template void k(T x) { std::array a { x, x, x }; std::cout
How do I assign a fstream to an fstream* in C++?
02/22/2025 by Alessio Spinellino
I'm writing a function in C++ that has to return more than one value, and I know that I can't. So I thought to pass the function two pointers to the files I want to open. This is the code and then I'll explain my problem: void openSourceOutputFiles(string sourceFilename, string […]
Reference counted singleton
02/22/2025 by Dominik Kaszewski
I have have found the following code in my company's codebase. The logic behind is to free the config singleton when nobody is using it, as some users have been found to inflate its size, which has been measured to cause memory usage issues. While the obvious solution would be […]

Category: Zero Sum

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