HaxeFlixel/flixel

package flixel.input;

#if FLX_ACCELEROMETER
import openfl.events.AccelerometerEvent;
import openfl.sensors.Accelerometer;

/**
 * A class providing access to the accelerometer data of the mobile device.
 */
class FlxAccelerometer
{
    /**
     * The x-axis value, in Gs (1G is roughly 9.8m/s/s), usually between -1 and 1.
     * The x-axis runs from the left to the right of the device in upright position. The acceleration is positive if the device is moving to the right.
     */
    public var x(default, null):Float = 0;

    /**
     * The y-axis value, in Gs (1G is roughly 9.8m/s/s), usually between -1 and 1.
     * The y-axis runs from the bottom to the top of the device in upright position. The acceleration is positive if the device is moving up along this axis.
     */
    public var y(default, null):Float = 0;

    /**
     * The z-axis value, in Gs (1G is roughly 9.8m/s/s), usually between -1 and 1.
     * The z-axis runs perpendicular to the screen of the device. The acceleration is positive if the device is moving the direction the screen is facing.
     */
    public var z(default, null):Float = 0;

    /**
     * Wether the accelerometer is supported on this mobile device
     */
    public var isSupported(get, never):Bool;

    var _sensor:Accelerometer;

    public function new()
    {
        if (Accelerometer.isSupported)
        {
            _sensor = new Accelerometer();
            _sensor.addEventListener(AccelerometerEvent.UPDATE, update);
        }
    }

    inline function get_isSupported():Bool
    {
        return Accelerometer.isSupported;
    }

    function update(Event:AccelerometerEvent):Void
    {
        #if (android || js)
        x = Event.accelerationX;
        y = Event.accelerationY;
        z = Event.accelerationZ;
        #else // Values on iOS and BlackBerry are inverted
        x = -Event.accelerationX;
        y = -Event.accelerationY;
        z = -Event.accelerationZ;
        #end

        #if js
        x /= 10;
        y /= 10;
        z /= 10;
        #end
    }
}
#end