Function pick_rotation_zone

perro_editor/res/scripts/scene/editor_viewport.rs:2518–2543

(
    ctx: &mut ScriptContext<'_, API>,
    pointer: ViewportPointer,
)

            node.layout.anchor = UiAnchor::Center;
            node.layout.size = UiVector2::ratio(canvas_size.0, canvas_size.1);
            node.transform.position = UiVector2::percent(50.0, 50.0);
            node.transform.pivot = UiVector2::percent(50.0, 50.0);
            node.transform.translation = Vector2::ZERO;
            node.transform.self_translation = Vector2::ZERO;
            node.transform.scale = Vector2::ONE;
            node.input_enabled = false;
        });
    }
    true
}

pub fn preview_doc_order(doc: &SceneDoc) -> Vec<u32> {
    let mut out = Vec::new();
    if let Some(root) = doc.scene.root {
        push_doc_order(doc, root.as_u32(), &mut out);
    }
    for node in doc.scene.nodes.iter() {
        let key = node.key.as_u32();
        if !out.contains(&key) {
            push_doc_order(doc, key, &mut out);
        }
    }
    out
}

pub fn push_doc_order(doc: &SceneDoc, key: u32, out: &mut Vec<u32>) {
    if out.contains(&key) {
        return;
    }