Rotator (Sample of grabbing an object and rotating it) - MR Tutorial for Nreal Light

Next, let's rotate the GameObject touched around the palm of your right hand. This tutorial is a continuation of the "Hold Me Tight" tutorial. If you have not yet comple "Hold Me Tight", please proceed with the following tutorial first.

• mr-tutorials-for-nreal-light/HoldMeTight

Sample Repository

• mr-tutorials-for-nreal-light/Rotator at main · karad/mr-tutorials-for-nreal-light https://github.com/karad/mr-tutorials-for-nreal-light/tree/main/Rotator

Run the sample

1. Clone Sample Repository, Change current directory to Rotator. And Open with Unity.
2. (If you don't have NRSDK) Download NRSDK 1.8.0 from Download | Nreal
3. Open Build Setting, change Platform to Android
4. Open Project, select Assets > import package > Custom Package and import NRSDKForUnityAndroid_1.8.0.unitypackage.
5. Check Build Settings > Player Settings by referring to Configure Build Settings
6. Press Build form Build Settings panel
7. Install *.apk on Android or DevKit.

Tutorial

1. Place the TargetCube a little closer

1. Select TargetCube1 from Hierarchy > Target
2. Change Pos z to 0.6

2. Change C# script TargetCube.cs

Modify the C# script to reflect the right hand rotation on the TargetCube. Change the TargetCube.cs code as follows.

using NRKernal;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

/// <summary>
/// Target Cube Script
/// </summary>
public class TargetCube : MonoBehaviour
{
    private MeshRenderer meshRender;

    void Awake()
    {
        // Get mesh renderer
        meshRender = transform.GetComponent<MeshRenderer>();
    }

    // Start is called before the first frame update
    void Start()
    {
    }

    // Update is called once per frame
    void Update()
    {

    }

    /// <summary>
    /// Trigger Enter Event Handler
    /// </summary>
    /// <param name="other"></param>
    private void OnTriggerEnter(Collider other)
    {
        Debug.Log("Enter!");
        meshRender.material.color = new Color(0f, 1f, 0f);
    }

    /// <summary>
    /// Trigger Stay Event Handler
    /// </summary>
    /// <param name="other"></param>
    private void OnTriggerStay(Collider other)
    {
        // Get right hand rotation value
        HandState handState = NRInput.Hands.GetHandState(HandEnum.RightHand);
        Quaternion handStateThumbTipRotation = handState.GetJointPose(HandJointID.Palm).rotation;
        Quaternion targetRotation = transform.rotation;
        targetRotation.z = handStateThumbTipRotation.z;
        transform.rotation = targetRotation;
    }

    /// <summary>
    /// Trigger Exit Event Handler
    /// </summary>
    /// <param name="other"></param>
    private void OnTriggerExit(Collider other)
    {
        Debug.Log("Exit!");
        meshRender.material.color = new Color(1f, 1f, 1f);
    }
}

3. Change C# script HandController.cs

Next, let's also modify the right hand controller. Change the touch point from index finger to palm. Change the HandController.cs code as follows.

using NRKernal;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

/// <summary>
/// Hand Controller for Tip
/// </summary>
public class HandController : MonoBehaviour
{
    /// <summary>
    /// IndexTip GameObject
    /// </summary>
    public GameObject hand_R_IndexTip;

    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        // Get Right Hand
        HandState handState = NRInput.Hands.GetHandState(HandEnum.RightHand);
        // Get Index Tip Position of right hand
        Vector3 handStatePalmPosition = handState.GetJointPose(HandJointID.Palm).position;
        // Set Hand R IndexTip Sphere position
        hand_R_IndexTip.transform.position = handStatePalmPosition;
    }
}

4. Create a display area for rotation value

Let's also create a display area to get a numerical value for the right hand rotation value. Create C# Script in the asset with the file name "DisplayInfo.cs". Write the code as follows.

using NRKernal;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

/// <summary>
/// Display about user actions
/// </summary>
public class DisplayInfo : MonoBehaviour
{
    /// <summary>
    /// 
    /// </summary>
    public Text info;

    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        // Numeric display of right hand palm rotation value
        HandState handState = NRInput.Hands.GetHandState(HandEnum.RightHand);
        if (handState != null)
        {
            info.text = handState.GetJointPose(HandJointID.Palm).rotation.z.ToString();
        };
    }
}

5. Put Text on the scene

Put Text object for displaying the cube rotation value.

1. Put Canvas from Create > UI
2. Put Text as a child of Canvas
3. Change Text to “Info” on Inspector panel.
4. Attach DisplayInfo.cs on Inspector panel of Canvas.
5. Set info to Info Text Object.

6. Run the tutorial

• Press Play button and run the tutorial.

7. Build

1. Press Build form Build Settings panel
2. Install *.apk on Android or DevKit.