Accelerometer input - How to limit rotation on both X and Z axis

Hey guys. Take a look at the game I'm trying to build. The idea is to put a sphere inside of the map, and challenge the player to take the ball from one side to the other without letting it fall.

As you can see, I have several problems:

• The platform rotates very fast (I need somehow to limit the rotation speed).
• The platform rotates indefinitely. This is what I'm focusing at right now. There needs to be a "max angle" that the platform can reach on both axis.
• The platform ends up rotating in the Y-Axis. I need to block this angle and allow only for X and Z rotations.

This is the script I'm using and a screenshot of the camera position when the game starts:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class TableMovement : MonoBehaviour {
5.  
6.     float ROTATE_AMOUNT = 1f; // at full tilt, rotate at 2 degrees per update
7.  
8.     float GetTiltValue_X() {
9.    
10.         float TILT_MIN_X = 0.1f;
11.         float TILT_MAX_X = 0.15f;
12.  
13.         // Work out magnitude of tilt
14.         float tilt = Mathf.Abs(Input.acceleration.x);
15.  
16.         // If not really tilted don't change anything
17.         if (tilt < TILT_MIN_X) {
18.             return 0;
19.         }
20.         float tiltScale = (tilt - TILT_MIN_X) / (TILT_MAX_X - TILT_MIN_X);
21.  
22.         // Change scale to be negative if accel was negative
23.         if (Input.acceleration.x < 0) {
24.             return tiltScale;
25.         } else {
26.             return -tiltScale;
27.         }
28.  
29.     }
30.  
31.     float GetTiltValue_Y() {
32.  
33.         float TILT_MIN_Y = 0.1f;
34.         float TILT_MAX_Y = 0.15f;
35.  
36.         // Work out magnitude of tilt
37.         float tilt = Mathf.Abs(Input.acceleration.y);
38.  
39.         // If not really tilted don't change anything
40.         if (tilt < TILT_MIN_Y) {
41.             return 0;
42.         }
43.         float tiltScale = (tilt - TILT_MIN_Y) / (TILT_MAX_Y - TILT_MIN_Y);
44.  
45.         // Change scale to be negative if accel was negative
46.         if (Input.acceleration.y < 0) {
47.             return -tiltScale;
48.         } else {
49.             return tiltScale;
50.         }
51.  
52.     }
53.  
54.     void Update() {
55.    
56.         float tiltValue_X = GetTiltValue_X();
57.         float tiltValue_Y = GetTiltValue_Y();
58.  
59.         transform.RotateAround (Vector3.zero, Vector3.right, tiltValue_Y * ROTATE_AMOUNT);
60.         transform.RotateAround (Vector3.zero, Vector3.forward, tiltValue_X * ROTATE_AMOUNT);
61.  
62.     }
63. }

I've tried using:

Code (CSharp):

1. Mathf.Clamp(transform.rotation.x, -15f, 15f); Mathf.Clamp(transform.rotation.z, -15f, 15f);

But it has no effect and the table keeps rotating. Any ideas? Thanks!

 

Ideas? Thanks!

 

Have you found a solution for this? I'm also trying to limit the rotation.

 

Nope, I never found a solution to this problem :/

 

I would recommend using the gyroscope instead of the accelerometer. I just recently made a labyrinth game, and I found that using the gyroscope gives you the ability to check boundaries.

//if statement to check boundaries of tilt

if (GyroToUnity (Input.gyro.attitude).x < 0.2 && GyroToUnity (Input.gyro.attitude).x > -0.2 && GyroToUnity (Input.gyro.attitude).z < 0.2 && GyroToUnity (Input.gyro.attitude).z > -0.2) {

             transform.rotation = GyroToUnity (Input.gyro.attitude);

}



//converts the data from the gyroscope to a quaternion with the phone Landscape Right, screen facing up[/SIZE]

private static Quaternion GyroToUnity(Quaternion q)

    {

        return new Quaternion(-q.x /2, 0, -q.y /2, q.w);

    }

[SIZE=4][/SIZE]

I hope this helps