ObjExporter

iOSからobjを書き出したくて以下を利用。

OBJ file from iOS and use the following.

ObjExporter - Unify Community Wiki

//https://wiki.unity3d.com/index.php/ObjExporter

using UnityEngine;
using System.Collections;
using System.IO;
using System.Text;
 
public class ObjExporter {
 
    public static string MeshToString(MeshFilter mf, MeshRenderer renderer) {
        Mesh m = mf.mesh;
        Material[] mats = renderer.sharedMaterials;
 
        StringBuilder sb = new StringBuilder();
 
        sb.Append("g ").Append(mf.name).Append("\n");
        foreach(Vector3 v in m.vertices) {
            sb.Append(string.Format("v {0} {1} {2}\n",v.x,v.y,v.z));
        }
        sb.Append("\n");
        foreach(Vector3 v in m.normals) {
            sb.Append(string.Format("vn {0} {1} {2}\n",v.x,v.y,v.z));
        }
        sb.Append("\n");
        foreach(Vector3 v in m.uv) {
            sb.Append(string.Format("vt {0} {1}\n",v.x,v.y));
        }
        for (int material=0; material < m.subMeshCount; material ++) {
            sb.Append("\n");
            sb.Append("usemtl ").Append(mats[material].name).Append("\n");
            sb.Append("usemap ").Append(mats[material].name).Append("\n");
 
            int[] triangles = m.GetTriangles(material);
            for (int i=0;i<triangles.Length;i+=3) {
                sb.Append(string.Format("f {0}/{0}/{0} {1}/{1}/{1} {2}/{2}/{2}\n", 
                    triangles[i]+1, triangles[i+1]+1, triangles[i+2]+1));
            }
        }
        return sb.ToString();
    }

    /*
    public static void MeshToFile(MeshFilter mf, string filename) {
        using (StreamWriter sw = new StreamWriter(filename)) 
        {
            sw.Write(MeshToString(mf));
        }
    }*/
}

加えてobjファイルのテキストデータをIOSからNatShareというアセットで書き出す。

var mesh = plane.GetComponent<MeshFilter>();
var renderer = plane.GetComponent<MeshRenderer>();
var str = ObjExporter.MeshToString(mesh,renderer);

new SharePayload().AddText(str).Commit();