U Can Touch This – MR Tutorial for Nreal light

Touch the object with the index finger of your right hand.

Sample Repository

mr-tutorials-for-nreal-light/UCanTouchThis at main · karad/mr-tutorials-for-nreal-light

Run the sample

Clone Sample Repository, Change current dir…


This content originally appeared on DEV Community and was authored by DEV Community

Image description

Touch the object with the index finger of your right hand.

Sample Repository

Run the sample

  1. Clone Sample Repository, Change current directory to UCanTouchThis. And Open with Unity.
  2. (If you don’t have NRSDK) Download NRSDK 1.7.0 from https://nreal-public.nreal.ai/download/NRSDKForUnityAndroid_1.7.0.unitypackage
  3. Open Build Setting, change Platform to Android
  4. Open Project, select Assets > import package > Custom Package and import NRSDKForUnityAndroid_1.7.0.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. Setting up the project for Nreal development

  1. See Quickstart for Android - NRSDK Documentation and configure the build settings.
  2. (If you don’t have NRSDK) Download NRSDK 1.7.0 from https://nreal-public.nreal.ai/download/NRSDKForUnityAndroid_1.7.0.unitypackage
  3. Open Project, select Assets > import package > Custom Package and import NRSDKForUnityAndroid_1.7.0.unitypackage.

2. Setting for HandTracking to NRInput

  1. Select NRInput , and change Input Source Type to Hands
  2. Put NRHand_R from Assets > NRSDK > Prefabs > Hands to NRInput > Right on the Scene.
  3. Put NRHand_L from Assets > NRSDK > Prefabs > Hands to NRInput > Left on the Scene.

3. Disable NRHandPointer_R

  1. Select NRHandPointer_R from NRInput > Right > NRHand_R on the Scene.
  2. Disable NRHandPointer_R from Inspector Panel.
  3. Do the same settings for the Left hand (NRHandPointer_L) .

4. Create empty game objects

  1. Create an empty game object in the Scene with the name "HandController".
  2. Also, create an empty game object in the Scene with the name "Target".
  3. Set each GameObject's positions to 0.
    1. Pos X : 0, Pos Y : 0, Pos Z : 0

5. Make Alpha material

  1. Create Material on Assets
  2. Change name to “AlphaMaterial”
  3. Change Rendering Mode item to Fade.

6. Create Sphere for hand tracking

  1. Put Sphere in HandController.
    1. Change name to “Hand_R_IndexTip”
    2. Pos X : 0, Pos Y : 0, Pos Z : 0
    3. Scale
      1. X : 0.03 , Y : 0.03 , Z : 0.03
    4. Add component Ridgitbody .
      1. Uncheck Use Gravity
    5. Set a material “AlphaMaterial” to Materials from Assets.

7. Create C# script for hand tracking extension

  1. Create C# Script in the asset with the file name "HandController.cs".
  2. Write the 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 handStateThumbTipPosition = handState.GetJointPose(HandJointID.IndexTip).position;
        // Set Hand R IndexTip Sphere position
        hand_R_IndexTip.transform.position = handStateThumbTipPosition;
    }
}

8. Attach the C# script on “HandController”

  1. Attach "HandController.cs" to “HandController” game object
    1. Set hand_R_IndexTip on Inspector panel to “Hand_R_IndexTip” game object from the scene.

9. Create Cube as a target object

  1. Put Sphere in Target.
    1. Change name to “TargetCube1”
    2. Pos X : 0.1, Pos Y : -0.05, Pos Z : 0.8
    3. Scale
      1. X : 0.1 , Y : 0.1 , Z : 0.1
    4. Add component Ridgitbody .
      1. Uncheck Use Gravity

10. Create C# script for target game object

  1. Create C# Script in the asset with the file name "TargetCube.cs".
  2. Write the 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
{
    // Start is called before the first frame update
    void Start()
    {
    }

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

    /// <summary>
    /// Display event log using console
    /// </summary>
    /// <param name="collision"></param>
    void OnCollisionEnter(Collision collision)
    {
        Debug.Log("Hit!");
    }
}

11. Attach the C# script on “Target”

  1. Attach "TargetCube.cs" to “TargetCube1” game object.

12. Build

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


This content originally appeared on DEV Community and was authored by DEV Community


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DEV Community | Sciencx (2022-02-25T08:11:10+00:00) U Can Touch This – MR Tutorial for Nreal light. Retrieved from https://www.scien.cx/2022/02/25/u-can-touch-this-mr-tutorial-for-nreal-light/

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