MapPoint

Description

This component represents an anchored point on the map.

Name	Type	Default	Description
latitude	number	37.7955281	The latitude of the map point
longitude	number	-122.3934225	The longitude of the map point
meters	number	33.33	Map meters per Transform unit for children of the map point.
minScale	number	false	Minimum width/scale relative to the map

Functions

Get

Returns a read-only reference.

Example

ecs.MapPoint.get(world, component.eid)

Set

Ensures the component exists on the entity, then assigns the (optional) data to the component.

Example

ecs.MapPoint.set(world, component.eid, {
  latitude: 37.7955281,
  longitude: -122.3934225,
  meters: 33.33,
  minScale: false
})

Mutate

Perform an update to the component within a callback function. Return true to indicate no changes made.

Example

ecs.MapPoint.mutate(world, component.eid, (cursor) => {
  cursor.latitude = 37.4419;
  cursor.longitude = -122.1430;
  return false;
})

Remove

Removes the component from the entity.

Example

ecs.MapPoint.remove(world, component.eid)

Has

Returns true if the component is present on the entity.

Example

ecs.MapPoint.has(world, component.eid)

Reset

Adds, or resets the component to its default state.

Example

ecs.MapPoint.reset(world, component.eid)

Advanced Functions

Cursor

Returns a mutable reference. Cursors are reused so only one cursor for each component can exist at a time.

Example

ecs.MapPoint.cursor(world, component.eid)

Acquire

Same behavior as cursor, but commit must be called after the cursor is done being used.

Example

ecs.MapPoint.acquire(world, component.eid)

Commit

Called after acquire. An optional third argument determines whether the cursor was mutated or not.

Example

ecs.MapPoint.commit(world, component.eid)
ecs.MapPoint.commit(world, component.eid, false)

Dirty

Mark the entity as having been mutated. Only needed in a specific case where systems are mutating data.

Example

ecs.MapPoint.dirty(world, component.eid)