Unity: Object is not being detected by raycast for highlighting

Question

I followed this tutorial on object selection. However, when I import my .obj assets and try to select/highlight them, it appears that the raycaster does not pick them up. Nothing happens when my mouse clicks on my .obj object. I added the necessary colliders (box collider even mesh collider) and nothing happens.

What am I doing wrong?

I didn't change the code from the source provided. I just imported my object file to the scene and added the necessary physics.

All I want to do is highlight my .obj file via onMouseDown.

AppRoot.cs:

using UnityEngine;
using System;

public class TransformObject
{
    ///////////////////////////////////////////////////////////////////////////
    #region Variables

    // variables

    #if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_WEBPLAYER
    private float RotationSpeed = 1500;
    private float MoveSpeed = 50.0f;
    private float ZoomSpeed = 15.3f;
    #endif // UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_WEBPLAYER

    public float MinDist = 2.0f;
    public float MaxDist = 50.0f;

    private Transform mMoveObject = null;

    #endregion
    ///////////////////////////////////////////////////////////////////////////

    ///////////////////////////////////////////////////////////////////////////
    #region Public methods

    /// <summary>
    /// 
    /// </summary>
    public TransformObject()
    {
        EnabledMoving = true;
    }

    /// <summary>
    /// Sets transform that will be used as "center" of the rotate / pan / zoom
    /// </summary>
    public void SetTransformRotateAround(Transform goMove)
    {
        mMoveObject = goMove;
        if (mMoveObject == null)
        {
            Debug.LogWarning("Error! Cannot find object!");
            return;
        }
    }

    public void Update()
    {
        if (!EnabledMoving)
        {
            return;
        }

        Vector3 dir = mMoveObject.position - Camera.main.transform.position;
        float dist = Math.Abs(dir.magnitude);

        Vector3 camDir = Camera.main.transform.forward;
        Vector3 camLeft = Vector3.Cross(camDir, Vector3.down);
        Vector3 camDown = Vector3.Cross(camDir, camLeft);
        //Vector3 camUp = Vector3.Cross(camLeft, camDir);

    #if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_WEBPLAYER

        float dx = Input.GetAxis("Mouse X");
        float dy = Input.GetAxis("Mouse Y");

        // rotate
        if (Input.GetMouseButton(0))
        {
            mMoveObject.Rotate(camLeft, dy * RotationSpeed * Time.deltaTime, Space.World);
            mMoveObject.Rotate(Vector3.down, dx * RotationSpeed * Time.deltaTime, Space.Self);
        }

        // move
        if (Input.GetMouseButton(1))
        {
            Vector3 camPos = Camera.main.transform.position;
            camPos += -camLeft * MoveSpeed * dx * Time.deltaTime;
            camPos += -camDown * MoveSpeed * dy * Time.deltaTime;
            Camera.main.transform.position = camPos;
        }

        // zoom
        if (Input.GetAxis("Mouse ScrollWheel") > 0)
        {
            if (dist > MinDist)
            {
                mMoveObject.Translate(-dir * ZoomSpeed * Time.deltaTime, Space.World);
            }
        }

        if (Input.GetAxis("Mouse ScrollWheel") < 0)
        {
            if (dist < MaxDist)
            {
                mMoveObject.Translate(dir * ZoomSpeed * Time.deltaTime, Space.World);
            }
        }

    #endif // UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_WEBPLAYER
    }
    #endregion
    ///////////////////////////////////////////////////////////////////////////

    ///////////////////////////////////////////////////////////////////////////
    #region Properties
    /// <summary>
    /// Gets or set value indicating if transformation is enabled
    /// </summary>
    public bool EnabledMoving
    {
        get;
        set;
    }

    /// <summary>
    /// Gets game object that moves around
    /// </summary>
    public Transform MoveObject
    {
        get
        {
            return mMoveObject;
        }
    }

    #endregion
    ///////////////////////////////////////////////////////////////////////////
}

TransformObject.cs

using UnityEngine;
using System;

public class TransformObject
{
    ///////////////////////////////////////////////////////////////////////////
    #region Variables

    // variables

    #if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_WEBPLAYER
    private float RotationSpeed = 1500;
    private float MoveSpeed = 50.0f;
    private float ZoomSpeed = 15.3f;
    #endif // UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_WEBPLAYER

    public float MinDist = 2.0f;
    public float MaxDist = 50.0f;

    private Transform mMoveObject = null;

    #endregion
    ///////////////////////////////////////////////////////////////////////////

    ///////////////////////////////////////////////////////////////////////////
    #region Public methods

    /// <summary>
    /// 
    /// </summary>
    public TransformObject()
    {
        EnabledMoving = true;
    }

    /// <summary>
    /// Sets transform that will be used as "center" of the rotate / pan / zoom
    /// </summary>
    public void SetTransformRotateAround(Transform goMove)
    {
        mMoveObject = goMove;
        if (mMoveObject == null)
        {
            Debug.LogWarning("Error! Cannot find object!");
            return;
        }
    }

    public void Update()
    {
        if (!EnabledMoving)
        {
            return;
        }

        Vector3 dir = mMoveObject.position - Camera.main.transform.position;
        float dist = Math.Abs(dir.magnitude);

        Vector3 camDir = Camera.main.transform.forward;
        Vector3 camLeft = Vector3.Cross(camDir, Vector3.down);
        Vector3 camDown = Vector3.Cross(camDir, camLeft);
        //Vector3 camUp = Vector3.Cross(camLeft, camDir);

    #if UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_WEBPLAYER

        float dx = Input.GetAxis("Mouse X");
        float dy = Input.GetAxis("Mouse Y");

        // rotate
        if (Input.GetMouseButton(0))
        {
            mMoveObject.Rotate(camLeft, dy * RotationSpeed * Time.deltaTime, Space.World);
            mMoveObject.Rotate(Vector3.down, dx * RotationSpeed * Time.deltaTime, Space.Self);
        }

        // move
        if (Input.GetMouseButton(1))
        {
            Vector3 camPos = Camera.main.transform.position;
            camPos += -camLeft * MoveSpeed * dx * Time.deltaTime;
            camPos += -camDown * MoveSpeed * dy * Time.deltaTime;
            Camera.main.transform.position = camPos;
        }

        // zoom
        if (Input.GetAxis("Mouse ScrollWheel") > 0)
        {
            if (dist > MinDist)
            {
                mMoveObject.Translate(-dir * ZoomSpeed * Time.deltaTime, Space.World);
            }
        }

        if (Input.GetAxis("Mouse ScrollWheel") < 0)
        {
            if (dist < MaxDist)
            {
                mMoveObject.Translate(dir * ZoomSpeed * Time.deltaTime, Space.World);
            }
        }

    #endif // UNITY_STANDALONE_WIN || UNITY_STANDALONE_OSX || UNITY_WEBPLAYER
    }
    #endregion
    ///////////////////////////////////////////////////////////////////////////

    ///////////////////////////////////////////////////////////////////////////
    #region Properties
    /// <summary>
    /// Gets or set value indicating if transformation is enabled
    /// </summary>
    public bool EnabledMoving
    {
        get;
        set;
    }

    /// <summary>
    /// Gets game object that moves around
    /// </summary>
    public Transform MoveObject
    {
        get
        {
            return mMoveObject;
        }
    }

    #endregion
    ///////////////////////////////////////////////////////////////////////////
}

Constants.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

public class Constants
{
    public const float cMaxRayCastDistance = 1000.0f;
}

Answer 1

The reason was that "femur_left_1_7_dist/default" and "femur_left_1_7_prox/default" has no colliders. So there are two ways to resolve this issue:

1. In project view select "femur_left_1_7_dist" and "femur_left_1_7_prox", and in inspector in Import settings choose "Generate Colliders" and press "Apply" button:

   
   OR

2. Select "femur_left_1_7_dist/default" in the scene and press "Component/Physics/Box Collider"; see the result here: https://dl.dropboxusercontent.com/u/20023505/stackoverflow_forum/s_fix.zip