@jigra/motion

The Motion API tracks accelerometer and device orientation (compass heading, etc.)

Install

npm install @jigra/motion
npx jig sync

Permissions

This plugin is currently implemented using Web APIs. Most browsers require permission before using this API. To request permission, prompt the user for permission on any user-initiated action (such as a button click):

import { PluginListenerHandle } from '@jigra/core';
import { Motion } from '@jigra/motion';


let accelHandler: PluginListenerHandle;

myButton.addEventListener('click', async () => {
  try {
    await DeviceMotionEvent.requestPermission();
  } catch (e) {
    // Handle error
    return;
  }

  // Once the user approves, can start listening:
  accelHandler = await Motion.addListener('accel', event => {
    console.log('Device motion event:', event);
  });
});

// Stop the acceleration listener
const stopAcceleration = () => {
  if (accelHandler) {
    accelHandler.remove();
  }
};

// Remove all listeners
const removeListeners = () => {
  Motion.removeAllListeners();
};

See the DeviceMotionEvent API to understand the data supplied in the 'accel' event.

API

• addListener('accel', ...)
• addListener('orientation', ...)
• removeAllListeners()
• Interfaces
• Type Aliases

addListener('accel', ...)

addListener(eventName: "accel", listenerFunc: AccelListener) => Promise<PluginListenerHandle>

Add a listener for accelerometer data

| Param | Type | | ------------------ | ------------------------------------------------------- | | eventName | 'accel' | | listenerFunc | AccelListener |

Returns: Promise<PluginListenerHandle>

Since: 1.0.0

addListener('orientation', ...)

addListener(eventName: "orientation", listenerFunc: OrientationListener) => Promise<PluginListenerHandle>

Add a listener for device orientation change (compass heading, etc.)

| Param | Type | | ------------------ | ------------------------------------------------------------------- | | eventName | 'orientation' | | listenerFunc | OrientationListener |

Returns: Promise<PluginListenerHandle>

Since: 1.0.0

removeAllListeners()

removeAllListeners() => Promise<void>

Remove all the listeners that are attached to this plugin.

Since: 1.0.0

Interfaces

PluginListenerHandle

| Prop | Type | | ------------ | ----------------------------------------- | | remove | () => Promise<void> |

AccelListenerEvent

| Prop | Type | Description | Since | | ---------------------------------- | ----------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----- | | acceleration | Acceleration | An object giving the acceleration of the device on the three axis X, Y and Z. Acceleration is expressed in m/s | 1.0.0 | | accelerationIncludingGravity | Acceleration | An object giving the acceleration of the device on the three axis X, Y and Z with the effect of gravity. Acceleration is expressed in m/s | 1.0.0 | | rotationRate | RotationRate | An object giving the rate of change of the device's orientation on the three orientation axis alpha, beta and gamma. Rotation rate is expressed in degrees per seconds. | 1.0.0 | | interval | number | A number representing the interval of time, in milliseconds, at which data is obtained from the device. | 1.0.0 |

Acceleration

| Prop | Type | Description | Since | | ------- | ------------------- | -------------------------------------------- | ----- | | x | number | The amount of acceleration along the X axis. | 1.0.0 | | y | number | The amount of acceleration along the Y axis. | 1.0.0 | | z | number | The amount of acceleration along the Z axis. | 1.0.0 |

RotationRate

| Prop | Type | Description | Since | | ----------- | ------------------- | ---------------------------------------------------------------- | ----- | | alpha | number | The amount of rotation around the Z axis, in degrees per second. | 1.0.0 | | beta | number | The amount of rotation around the X axis, in degrees per second. | 1.0.0 | | gamma | number | The amount of rotation around the Y axis, in degrees per second. | 1.0.0 |

Type Aliases

AccelListener

(event: AccelListenerEvent): void

OrientationListener

(event: RotationRate): void

OrientationListenerEvent

RotationRate