static void DoExport(GameObject obj, bool makeSubmeshes, string outputDir, string fileName, List <string> additionalComments)
{
string meshName = obj.name;
string mtllib = Path.Combine(outputDir, fileName + ".mtl");
string outputObject = Path.Combine(outputDir, fileName + ".obj");
ObjExporterScript.Start();
if (File.Exists(outputObject))
{
Debug.Log("skipping, already exists: " + outputObject);
return;
}
using (StreamWriter sw = new StreamWriter(outputObject))
{
using (StreamWriter mtllibs = new StreamWriter(mtllib))
{
sw.WriteLine("#" + meshName + ".obj");
sw.WriteLine("#" + System.DateTime.Now.ToLongDateString());
sw.WriteLine("#" + System.DateTime.Now.ToLongTimeString());
foreach (string s in additionalComments)
{
sw.WriteLine("#" + s);
}
sw.WriteLine("#-------");
sw.Write("\n\n");
sw.WriteLine("mtllib " + fileName + ".mtl");
Transform t = obj.transform;
Vector3 originalPosition = t.position;
t.position = Vector3.zero;
if (!makeSubmeshes)
{
sw.Write("g " + t.name + "\n");
}
processTransform(t, makeSubmeshes, outputDir, mtllibs, sw);
t.position = originalPosition;
ObjExporterScript.End();
//Debug.Log("Exported Mesh: " + fileName);
}
}
}
static void processTransform(Transform t, bool makeSubmeshes, string outputDir, StreamWriter mtllib, StreamWriter sw)
{
HashSet <String> matsSet = new HashSet <string>();
sw.Write("#" + t.name
+ "\n#-------"
+ "\n");
if (makeSubmeshes)
{
sw.Write("g " + t.name + "\n");
}
MeshFilter mf = t.GetComponent <MeshFilter>();
if (mf)
{
sw.Write(ObjExporterScript.MeshToString(mf, t));
// write materials
Mesh m = mf.sharedMesh;
if (m != null)
{
Renderer ren = mf.GetComponent <Renderer>();
if (ren != null)
{
Material[] mats = ren.sharedMaterials;
for (int material = 0; material < m.subMeshCount; material++)
{
Material mat = mats[material];
if (mat == null)
{
continue;
}
string matName = mat.name + mat.GetInstanceID();
Texture mainTex = null;
mainTex = mat.GetTexture("_MainTex");
// If the texture is valid, and not yet in the set
// then extract the texture information and update the mtl file
if (mainTex != null && !matsSet.Contains(matName))
{
// Get the raw texture byte
byte[] textureData = AssetDatabaseInst.DB.extractUsingFilename(mainTex.name);
// Set the appropriate file name of the texture
var fileName = Path.ChangeExtension(mainTex.name, ExportModelData.expectedTextureExtension);
// Set the path where the texture file will be written
var textureOutputPath = Path.Combine(Path.Combine(outputDir, ExportModelData.outputDirectoryTextures), fileName);
if (!File.Exists(textureOutputPath))
{
File.WriteAllBytes(textureOutputPath, textureData);
}
// Set the path of the texture file for the MTL file
var textureMtlPath = GetMtlTexturePath(ExportModelData.mtlWebPathing, ExportModelData.outputDirectoryTextures, fileName);
mtllib.WriteLine("newmtl " + matName);
mtllib.WriteLine("map_Kd " + textureMtlPath);
}
matsSet.Add(matName);
}
}
}
}
for (int i = 0; i < t.childCount; i++)
{
processTransform(t.GetChild(i), makeSubmeshes, outputDir, mtllib, sw);
}
}