Module node 

Scene nodes — typed wrappers for the scene graph with parent-child transforms.

Each node has a local transform (position, rotation_z, scale). The world transform is computed by walking the parent chain. Dirty flags prevent redundant world-transform recomputation.

Structs

NodeId

Unique ID for a scene node.

SceneGraph

A flat scene graph with parent-child node relationships.

SceneNode

A scene graph node with parent-child transform hierarchy.

Transform

A 3-DOF local transform stored compactly.