Loading a .OBJ into Unity at runtime

Question

My job is to write a code which loads a .OBJ into Unity in runtime. Unity has provided a sample code in it's wiki page. I used the following code to use the class given in the link:

public class Main : MonoBehaviour {

    // Use this for initialization
    void Start () {
        Mesh holderMesh = new Mesh ();
        ObjImporter newMesh = new ObjImporter();
        holderMesh = newMesh.ImportFile("C:/Users/cvpa2/Desktop/ng/output.obj");
    }

I'm not getting any errors in Unity Monodevelop, but neither is the model loaded. What may be the probable solution?

Answer 1

Just creating a Mesh object is not enough. You will have to do at least two more things:

• Create a MeshRenderer component
• Create a MeshFilter component

So if you change your code to the following you should at least see your mesh if it has been successfully created.

using UnityEngine;
using System.Collections;

public class Main : MonoBehaviour
{

    // Use this for initialization
    void Start()
    {
        Mesh holderMesh = new Mesh();
        ObjImporter newMesh = new ObjImporter();
        holderMesh = newMesh.ImportFile("C:/Users/cvpa2/Desktop/ng/output.obj");

        MeshRenderer renderer = gameObject.AddComponent<MeshRenderer>();
        MeshFilter filter = gameObject.AddComponent<MeshFilter>();
        filter.mesh = holderMesh;
    }
}

From there on out you'd still have to assign a material (if loaded/created) and other such things, but it would be a start.