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copied!<p>I dont know how to get the angle of the camera, but I do have an app that will calculate the tilt of the phone based on the Yaw/Roll/Pitch.</p> <pre><code>namespace PhoneUtilities.Utilities { public class AccelerometerMath { public static double RadianToDegree(double radians) { return radians * (180 / Math.PI); } public static double Pitch(AccelerometerReading e) { return RadianToDegree((Math.Atan(e.Acceleration.X / Math.Sqrt(Math.Pow(e.Acceleration.Y, 2) + Math.Pow(e.Acceleration.Z, 2))))); } public static double Roll(AccelerometerReading e) { return RadianToDegree((Math.Atan(e.Acceleration.Y / Math.Sqrt(Math.Pow(e.Acceleration.X, 2) + Math.Pow(e.Acceleration.Z, 2))))); } public static double Yaw(AccelerometerReading e) { return RadianToDegree((Math.Atan(Math.Sqrt(Math.Pow(e.Acceleration.X, 2) + Math.Pow(e.Acceleration.Y, 2)) / e.Acceleration.Z))); } } } </code></pre> <p>The calculations were able to get me the angle of the tilt, here is an example I use for some trig calculation Cos(angle) = adj/hyp:</p> <pre><code>private double CalcUpAdj(AccelerometerReading reading) { double angle = PhoneUtilities.Utilities.AccelerometerMath.Yaw(reading); //Get the angleNeeded for calculation double angleNeeded = Math.Abs(angle); double adj = CalcAdj(angleNeeded); tbAngle.Text = String.Format("{0:0.00}", angleNeeded) + (char)176; textBlockAdj.Text = adj.ToString(); return adj; } private double CalcAdj(double angleNeeded) { double number; if (double.TryParse(tbHyp.Text, out number)) { double hyp = number; double adj = Math.Cos(Math.PI * angleNeeded / 180) * hyp; tbAngle.Text = String.Format("{0:0.00}", angleNeeded) + (char)176; textBlockAdj.Text = adj.ToString(); return adj; } return 0; } </code></pre> <p>I dont know if this will help you with your camera, but I imagine if you knew the dimensions of the screen you could calculate the angle based on the tilt of the phone. Hopefully you find this helpful.</p>

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