The Helios simulation system is a versatile modeling framework that handles tasks such as managing geometry and associated data structures through a C++ API. Plug-ins build off of the Helios core engine, and access the geometry and data via the Helios context. The sytem comes with a visualization plug-in that can produce stunning renderings of model geometry and data with relatively little effort.
In setCameraPosition, corrected the assignments of camera_position and camera_lookat to use the function parameters instead of the non-existent __camera_position and __camera_lookat.
In render, updated the error message to convert outputdir to a std::string before concatenating it with the rest of the error message.