Question 1

How do I set up bgfx with CMake in my C++ project?

Accepted Answer

bgfx provides CMake support through its repository; clone it and add it as a subdirectory, then link against the bgfx library. Refer to the building documentation online for platform-specific flags and dependencies.

Question 2

bgfx vs SDL: which is better for 2D games?

Accepted Answer

SDL is a lighter-weight multimedia library ideal for 2D input, windowing, and basic rendering, while bgfx is a full rendering backend suited for 3D or advanced 2D with cross-API support. Choose SDL for simplicity, bgfx for graphics-heavy projects.

Question 3

Does bgfx support virtual reality (VR) or ray tracing?

Accepted Answer

bgfx does not have built-in VR or ray tracing features; you must implement these using its low-level APIs. It abstracts underlying graphics APIs, so you can access VR or ray tracing if the backend (e.g., Vulkan) supports it, but without high-level helpers.

Question 4

How to write shaders that work across all bgfx backends?

Accepted Answer

bgfx uses a custom shader intermediate language that compiles to backend-specific shaders (HLSL, GLSL, etc.). Write shaders in this format and use its shader compiler tool to generate cross-platform binaries, ensuring consistency.

Question 5

What's the performance overhead of bgfx compared to native Vulkan?

Accepted Answer

bgfx adds minimal overhead by design, as it batches commands and optimizes state changes. In practice, performance is near-native for most use cases, but extreme low-level tuning might require bypassing its abstraction for specific hardware.

Question 6

Can I use bgfx for a mobile game without a full engine?

Accepted Answer

Yes, bgfx supports Android and iOS with OpenGL ES and Metal backends, but you'll need to handle input, audio, and game logic separately. It's suitable if you're building a custom stack, as used in games like Offroad Legends 2.

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