Yes, I know. But such libraries often call themselves "physics simulation libraries." The term "computer graphics" is typically reserved for rendering. So what is this library doing? The scene setup and rendering? The offline rasterization? The frame-to-frame physical simulations? More than one of the above?
It's a library of complete physically-based simulation and rendering algorithm implementations.
You seem to be assuming that "library" must mean a layer or an API providing certain runtime abstractions or functionality. That's not really what this is. It's more about code reuse and a rationalized core of tools for implementing the various techniques.
