What is the difference between OpenGL and Vulkan. What should I prefer to build my own 3d physics engine?
OpenGL and Vulkan are both graphics APIs (Application Programming Interfaces) that allow developers to access and control graphics hardware, such as GPUs, to render 3D graphics.

The main difference between the two is that OpenGL is a higher-level API that is designed to be more accessible and easier to use, while Vulkan is a lower-level API that offers more control and performance optimizations.

OpenGL has been around since the 1990s and is widely used in many industries, including gaming, virtual reality, and scientific visualization. It has a large community of developers and supports many platforms, including Windows, macOS, Linux, and mobile devices.

Vulkan, on the other hand, is a newer API that was released in 2016. It was designed to address some of the limitations of OpenGL, such as poor multi-threading support and high CPU overhead. Vulkan allows developers to take more direct control of the graphics hardware, resulting in better performance and efficiency.

If you're building your own 3D physics engine, the choice between OpenGL and Vulkan depends on your specific needs and goals. If you're just starting out and want an API that's easy to learn and use, OpenGL might be the better choice. If you need more control and want to optimize your engine for performance, Vulkan could be a better fit.

Ultimately, both APIs have their strengths and weaknesses, and the choice between them will depend on your specific use case and goals.
Thank you! That is very helpful. A further question. Given code already written in OpenGL. How difficult is it to convert it into Vulkan. And how difficult is it to make the converted Vulkan code perform optimally?
Converting OpenGL code to Vulkan can be moderately difficult as there are differences in the way the two APIs work.

Identifying equivalent Vulkan functions for OpenGL functions used in the code may require manual mapping.

Additionally, optimizing the converted Vulkan code may require a thorough understanding of the Vulkan API and hardware architecture.

Overall, the difficulty of the task depends on the complexity of the original OpenGL code and the performance requirements of the application.