Coal is the start of a custom voxel engine in C++ using SDL3 and Vulkan. The immediate work is the platform and rendering foundation: opening a window, loading Vulkan, and establishing a build that can be extended in small steps.
The code includes a resizable SDL window, Vulkan loader setup, and initial component, entity, and system folders. It does not yet establish a rendered voxel scene.
The project targets Windows. Its build files are behind the source layout: CMake still refers to src/main.cpp, while the entry point has moved to coal/main.cpp. That mismatch needs repair before the documented build can be relied on.