This is the source tree for wsg-lib, a Rust library wrapping wgpu for simple 3D drawing operations. The crate follows a layered architecture organized into seven modules:

Module	Responsibility
core	Manager (Context) + Executor (Renderer) layers — GPU lifecycle and draw call orchestration
resources	Data types: Vertex (CPU-side), Mesh (GPU geometry), Material (appearance descriptor)
pipeline	PipelineCache — WGSL shader loading and RenderPipeline compilation cache
scene	Scene — resource depot and entity graph for declarative rendering setup
utils	Configuration constants and WsgError type
app	App facade — high-level application orchestration with window lifecycle, event loop, and render automation
handler	AppHandler trait — user-defined game logic interface injected into the render loop

Architecture Pattern

The library supports two workflows:

Declarative (recommended): Use Scene to register resources and associate entities before the render loop begins. This is the "App facade" pattern described in ARCHI_APP.
Manual: Manipulate Context, Renderer, and PipelineCache directly for fine-grained control.

Dependency Flow

scene → core → pipeline → utils
        ↘→ resources → utils (via Vertex offsets)
                  ↗
              scene (consumes)

Each submodule's mod.rs re-exports its public types so consumers import through the module level rather than deep paths.