RelativeOrientationSensor
The RelativeOrientationSensor
interface of the Sensor APIs describes the device's physical orientation without regard to the Earth's reference coordinate system.
To use this sensor, the user must grant permission to the 'accelerometer'
, and 'gyroscope'
device sensors through the Permissions API. In addition, this feature may be blocked by a Permissions Policy set on your server.
Constructor
RelativeOrientationSensor()
-
Creates a new
RelativeOrientationSensor
object.
Instance properties
No specific properties; inherits properties from its ancestors OrientationSensor
and Sensor
.
Instance methods
No specific methods; inherits methods from its ancestors OrientationSensor
and Sensor
.
Events
No specific events; inherits events from its ancestor, Sensor
.
Examples
Basic Example
The following example, which is loosely based on Intel's Orientation Phone demo, instantiates an RelativeOrientationSensor
with a frequency of 60 times a second.
Note: The Intel demo this is based on uses the AbsoluteOrientationSensor
. On each reading it uses OrientationSensor.quaternion
to rotate a visual model of a phone.
js
const options = { frequency: 60, referenceFrame: "device" };
const sensor = new RelativeOrientationSensor(options);
sensor.addEventListener("reading", () => {
// model is a Three.js object instantiated elsewhere.
model.quaternion.fromArray(sensor.quaternion).inverse();
});
sensor.addEventListener("error", (error) => {
if (event.error.name === "NotReadableError") {
console.log("Sensor is not available.");
}
});
sensor.start();
Permissions Example
Using orientation sensors requires requesting permissions for multiple device sensors. Because the Permissions
interface uses promises, a good way to request permissions is to use Promise.all
.
js
const sensor = new RelativeOrientationSensor();
Promise.all([
navigator.permissions.query({ name: "accelerometer" }),
navigator.permissions.query({ name: "gyroscope" }),
]).then((results) => {
if (results.every((result) => result.state === "granted")) {
sensor.start();
// ...
} else {
console.log("No permissions to use RelativeOrientationSensor.");
}
});
Specifications
Specification |
---|
Orientation Sensor # relativeorientationsensor-interface |
Browser compatibility
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