But I didn't mention any practical usage of such a scripting language at the time, even though there were some unexpected applications of it, e.g., in game hacking. I called this language CSCS: Customized Scripting in C#.
#XAMARIN WINDOWMANAGER DEFAULT DISPLAY ROTATION HOW TO#
If your event handler is not guaranteed to run on the UI thread, and if the event handler needs to access user-interface elements, use the MainThread.BeginInvokeOnMainThread method to run that code on the UI thread.In the July/August 2016 issue of CODE Magazine, I published an article on how to create your own scripting language and implement it in C#. UI – Rate suitable for general user interface.Default – Default rate suitable for screen orientation changes.Game – Rate suitable for games (not guaranteed to return on UI thread).Fastest – Get the sensor data as fast as possible (not guaranteed to return on UI thread).If the device is positioned so its left edge is on a table, and the top points north, the device has been rotated –90 degrees around the Y axis (or 90 degrees around the negative Y axis). When the device is held upright so that the top (in portrait mode) points towards the sky, and the back of the device faces north, the device has been rotated 90 degrees around the X axis. The device has been rotated 90 degrees around the Z axis of the Earth. When the device lies flat on a table with its screen facing up, and the top of the device (in portrait mode) pointing west, the Quaternion value is (0, 0, 0.707, 0.707). All rotations can be analyzed relative to this position. The Quaternion value represents the identity quaternion (0, 0, 0, 1). When the device lies flat on a table with its screen facing up, with the top of the device (in portrait mode) pointing north, the two coordinate systems are aligned. These are right-hand coordinate systems, so with the thumb of the right hand pointed in the positive direction of the rotation axis, the curve of the fingers indicate the direction of rotation for positive angles.
If an axis of rotation is the normalized vector (a x, a y, a z), and the rotation angle is Θ, then the (X, Y, Z, W) components of the quaternion are: The Quaternion describes the rotation of the device's coordinate system relative to the Earth's coordinate system.Ī Quaternion value is very closely related to rotation around an axis.
Void OrientationSensor_ReadingChanged(object sender, OrientationSensorChangedEventArgs e)Ĭonsole.WriteLine($"Reading: X: ") OrientationSensor.ReadingChanged += OrientationSensor_ReadingChanged Register for reading changes, be sure to unsubscribe when finished Set speed delay for monitoring changes. Any changes are sent back through the ReadingChanged event. The OrientationSensor is enabled by calling the Start method to monitor changes to the device's orientation, and disabled by calling the Stop method. Using OrientationSensorĪdd a reference to Xamarin.Essentials in your class: using Xamarin.Essentials To start using this API, read the getting started guide for Xamarin.Essentials to ensure the library is properly installed and set up in your projects. If you need to determine if the device's video display is in portrait or landscape mode, use the Orientation property of the ScreenMetrics object available from the DeviceDisplay class. This class is for determining the orientation of a device in 3D space.
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