How can I get the distance of device moves?

Question

I want to implement this type of functionality using core motion. Any idea how to implement this type of functionality. From research I have find out we have to used Device Motion.

In this mode, the camera zoom is controlled by moving the phone from/to the user, that is, when the user moves the phone away from himself with the “zoom” button held down, the image is zoomed in, and when the user moves the phone towards himself, it zooms out. When you release the zoom button, the current zoom level is saved and does not change when moving.

The zoom should work in any plane and depend only on the direction of movement to /from the user(not only in the horizontal plane). The zoom level depends on the distance the device moves: the zoom changes gradually 2x times if the phone is moved for 5cm and 10x is max (when the phone is moved for 30cm).

Here I have used like this: How can I get the distance of device moves ???

motionManager.StartDeviceMotionUpdates(CMAttitudeReferenceFrame.XArbitraryCorrectedZVertical, 
        NSOperationQueue.CurrentQueue, delegate (CMDeviceMotion motion, NSError error) {

                CMAttitude attitude = motion.Attitude;
                CMAcceleration userAcceleration = motion.UserAcceleration;

                double roll = attitude.Roll;


                double pitch = attitude.Pitch;

                double yaw = attitude.Yaw;

                double accX = userAcceleration.X;

                double accY = userAcceleration.Y;

                double accZ = userAcceleration.Z;


                Console.WriteLine("Y"+ accY);
                Console.WriteLine("Z" + accZ);

                UpdateBallWithRoll(roll, pitch, yaw, accX, accY, accZ);

            });

        private void UpdateBallWithRoll(double roll, double pitch, double yaw, double accX, double accY, double accZ)
    {
        try
        {
            X += 2 * roll;
            Y += 2 * pitch;
           
            

            X *= 0.8;
            Y *= 0.8;
           


            double newX = ball.Frame.X + X;
            double newY = ball.Frame.Y + Y;
            

            newX = Math.Min(280, Math.Max(0, newX));
            newY = Math.Min(527, Math.Max(64, newY));
           
            double newR = R + 10 * accZ;
            ball.Frame = new CoreGraphics.CGRect(newX, newY, newR, newR);
            
        }
        catch (Exception ex)
        {

        }
    }

https://stackoverflow.com/questions/23602014/is-there-a-way-to-calculate-small-distances-with-coremotion — Jason, Jul 09 '20 at 12:45
@Jason did you found any code that achieve that goal ? thanx in advance — Vanjara Sweta, Jul 09 '20 at 13:02
the answer in that question clearly says "No. The margin for error is too great ". I don't think what you're trying to do is possible with CoreMotion — Jason, Jul 09 '20 at 13:07
@Jason If not then how can I achieve this functionality in iOS ? — Vanjara Sweta, Jul 09 '20 at 13:19
I have no idea. I would guess that it's not possible with the current hardware/API. But I am not an expert on every facet of iOS. — Jason, Jul 09 '20 at 13:21
@VanjaraSweta Hi , do you mean that want to calcuate the distance by using camera ? — Junior Jiang, Jul 10 '20 at 08:39
No means getting starting position of camera(Device) and getting the distance of device moves. — Vanjara Sweta, Jul 10 '20 at 09:35
@VanjaraSweta Okey , I will check that . If good ideas will update here . — Junior Jiang, Jul 10 '20 at 10:03

How can I get the distance of device moves?

0 Answers0