Local

OBR.scene.local

An Item is the basic building block of everything shown in a Scene.

For all available items see here.

This API is a mirror to the Items API but only interacts with local items.

A local item is a temporary item that will only be seen by the current user.

They are most useful for displaying feedback to the user such as showing a label when using a custom tool.

Reference

Methods

getItems

async getItems(filter)

Get then current local items in the scene.

Parameters

NAME	TYPE	DESCRIPTION
filter	ItemFilter	An optional filter to run on the scenes local items

Example

Get local items with the given ids.

const uuid = "55c04fba-9fa3-483b-8cf8-287737cbea9b";
const items = await OBR.scene.local.getItems([uuid]);

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updateItems

async updateItems(filterOrItems, update, fastUpdate, updateAttachments)

Update existing local items in the scene.

To track changes and ensure immutability the update function uses an Immer WritableDraft.

Parameters

NAME	TYPE	DESCRIPTION
filterOrItems	ItemFilter | Item[]	Either a filter or a list of local items to update
update	(draft: WritableDraft<Item[]>) => void	An update function that allows you to update an Immer WritableDraft of the input local items
fastUpdate	boolean	If true a faster update method will be used. Not all values can be updated using this method so check here to see if this will work.
updateAttachments	boolean	Whether to automatically resolve and update attached items (defaults to true)

Example

Update the position of a known local item

const uuid = "55c04fba-9fa3-483b-8cf8-287737cbea9b";

await OBR.scene.local.updateItems([uuid], (items) => {
  for (let item of items) {
    item.position.x += 100;
  }
});

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addItems

async addItems(items)

Add new local items to the scene.

To create new items you can use the item Builders.

Parameters

NAME	TYPE	DESCRIPTION
items	Item[]	A list of items to add

Example

Add a label to the scene

import OBR, { buildLabel } from "@owlbear-rodeo/sdk";

const item = buildLabel().plainText("Test").build();
OBR.scene.local.addItems([item]);

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deleteItems

async deleteItems(ids)

Delete existing items by their IDs.

Parameters

NAME	TYPE	DESCRIPTION
ids	string[]	A list of items to delete by their IDs

Example

Delete a known local item

const uuid = "55c04fba-9fa3-483b-8cf8-287737cbea9b";

OBR.scene.local.deleteItems([uuid]);

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getItemAttachments

async getItemAttachments(ids)

Get all items, attachments and sub-attachments for a set of item IDs.

Parameters

NAME	TYPE	DESCRIPTION
ids	string[]	A list of items to look up by their IDs

Returns a list of Items.

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getItemBounds

async getItemBounds(ids)

Get the axis-aligned bounding box for the given items.

Parameters

NAME	TYPE	DESCRIPTION
ids	string[]	A list of items to look up by their IDs

Returns a BoundingBox.

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onChange

onChange(callback);

Parameters

NAME	TYPE	DESCRIPTION
callback	(items: Item[]) => void	A callback for when a local item changes. The items array will include all local items in the scene, not just those that changed.

Returns a function that when called will unsubscribe from change events.

Example

/**
 * Use an `onChange` event with a React `useEffect`.
 * `onChange` returns an unsubscribe event to make this easy.
 */
useEffect(
  () =>
    OBR.scene.local.onChange((items) => {
      // React to item changes
    }),
  []
);

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Type Definitions

ItemFilter

A filter to run on a list of items.

TYPE
function

Parameters

NAME	TYPE	DESCRIPTION
item	Item	The item to run the filter on

Returns a boolean. If true the item passes the filter and will be used. If false the item will be ignored.

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