Small examples for game development in Qt, OpenGL, Box2D, Bullet Physics, OpenAL, and so on.

8Observer8

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8Observer8

I have found two solutions how I can make the first person movement in the browser. Qt doesn't allow it because it is impossible to call emscripten_request_pointerlock() from Qt application: https://bugreports.qt.io/browse/QTBUG-126513

The solution is to use SDL3, Emscripten, and Bullet Physics: Click to run a demo in the browser

The demo allows to move with first person and third person view:

Baked shadows and textures using SDL3, Emscripten, OpenGL ES 2.0, Bullet Physics, and C++

Demo in the browser

8Observer8

Critical problems for WebAssembly

Background color of parent window is changed to black: https://bugreports.qt.io/browse/QTBUG-120651
emscripten_request_pointerlock() returns EMSCRIPTEN_RESULT_UNKNOWN_TARGET: https://bugreports.qt.io/browse/QTBUG-126513
Dealing with keyboard layout for input on Qt WebAssembly: https://forum.qt.io/post/790688

8Observer8

Transformed triangle in OpenGL 3.3 and Qt 6.9

Video: https://www.youtube.com/watch?v=AGHZsOrazEU

Source: https://github.com/8Observer8/basics-of-opengl33-and-qt6

8Observer8

Debug drawer for Box2D v3 using QPainter

It uses b2World_Draw to draw Box2D objects for debugging. You can just download and run it without compiling libs because it include libs for Windows (MinGW) and Android.

Source: https://github.com/8Observer8/debug-drawer-qpainter-box2dv3-qt6-cpp

8Observer8

Tank-transistor movement with Bullet Physics

View Live Wasm-Demo - you can control the tank-transistor with WASD-keys in the browser

Source code

8Observer8

Tutorials from Box2D/Box3D creator Erin Catto on the control character:

Rigid body character mover

Dynamic Character Mover : Box3D

8Observer8

Dear ImGui + Qt 6 + OpenGL 3.3 for Windows

Source code: https://github.com/ivan-enzhaev/imgui-opengl-test-qt6

8Observer8

Qt 6 + SDL3_image (WebP) + Modern OpenGL 3.3 Core (Desktop)

A step-by-step guide to configuring and running a static desktop project integrating Qt 6 and SDL3_image with WebP support and an OpenGL 3.3 context on Windows and Ubuntu.

The free texture clear_01.png used in this project was downloaded from OpenGameArt (Crate #5) and converted to WebP format (clear_01.webp).

Source Code

8Observer8

Qt 6 + cglm + SDL3_image (WebP) + Modern OpenGL 3.3 Core: Rotating 3D Textured Cube (Desktop)

A step-by-step guide to configuring and running a static desktop project integrating Qt 6, cglm math library for Perspective, View, and Model (MVP) transformations, a dedicated UV buffer, depth testing, SDL3_image with WebP, and smooth 90°/s rotation via QTimer on Windows and Ubuntu.

Source Code

Executables (Windows and Linux)

Live Wasm Demo