sceneFixedPass method
Walks this node's subtree once per physics substep and dispatches
Component.fixedTick to every component.
Called by Scene's fixed-step driver inside its substepping loop, before the physics world's step. Traversal order is parent before children, matching scenePrePass.
Implementation
void sceneFixedPass(double fixedDt) {
for (int i = 0; i < _components.length; i++) {
_components[i].fixedTick(fixedDt);
}
for (final child in children) {
child.sceneFixedPass(fixedDt);
}
}