Module scene_evaluator 

Scene evaluation driver (lightweight session, no ECS). A lightweight session driver for scene evaluation (no ECS).

The SceneEvaluator owns the lowered animation cells and drives them along a fixed logic grid:

• SceneEvaluator::advance_to advances the internal clock to the floor logic tick of a render sample time, stepping every active cell (iterative leaves integrate; functional leaves step as no-ops);
• SceneEvaluator::sample_into is pure: it samples every active cell at the internal clock and extracts CoreItems, mirroring SealedRanimScene::eval_at_sec’s (animation_id, part) identities;
• SceneEvaluator::seek resets all cells and replays (deterministic contract: replay equals forward advancement).

This is the M1 runtime: self-contained iterative animations work without ECS. See docs/design notes for the surrounding design.

Structs

SceneEvaluator

Lightweight scene evaluation session.

Type Aliases

EvaluatedFrame

A reusable frame-local output buffer of ((animation_id, part), CoreItem).