private void ParseObjToken(string line, string[] tokens)
{
string token = tokens[0].ToLower();
try
{
switch (token)
{
case "v":
{
float x = float.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], System.Globalization.CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], System.Globalization.CultureInfo.InvariantCulture);
Vector3 p = new Vector3(x * Scale, y * Scale, z * Scale);
//BBox.AddFloat3(ref p);
Positions.Add(p);
break;
}
case "vn":
{
if (ParseNormals)
{
float x = float.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], System.Globalization.CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], System.Globalization.CultureInfo.InvariantCulture);
float modifier = -1.0f;
Normals.Add(new Vector3(x, y, z) * modifier);
}
break;
}
case "vt":
{
float x = float.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], System.Globalization.CultureInfo.InvariantCulture);
Texcoords.Add(new Vector(x, y, 0f));
break;
}
case "f":
{
int v0 = 0, v1 = 0, v2 = 0;
if (tokens.Length >= 10)
{
//full v, vn, vt indices
v0 = int.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
v1 = int.Parse(tokens[4], System.Globalization.CultureInfo.InvariantCulture);
v2 = int.Parse(tokens[7], System.Globalization.CultureInfo.InvariantCulture);
mCurrentGroup.VIndices.Add(new Int3(v0 - 1, v1 - 1, v2 - 1));
v0 = int.Parse(tokens[2], System.Globalization.CultureInfo.InvariantCulture);
v1 = int.Parse(tokens[5], System.Globalization.CultureInfo.InvariantCulture);
v2 = int.Parse(tokens[8], System.Globalization.CultureInfo.InvariantCulture);
mCurrentGroup.TIndices.Add(new Int3(v0 - 1, v1 - 1, v2 - 1));
if (ParseNormals)
{
v0 = int.Parse(tokens[3], System.Globalization.CultureInfo.InvariantCulture);
v1 = int.Parse(tokens[6], System.Globalization.CultureInfo.InvariantCulture);
v2 = int.Parse(tokens[9], System.Globalization.CultureInfo.InvariantCulture);
mCurrentGroup.NIndices.Add(new Int3(v0 - 1, v1 - 1, v2 - 1));
}
}
else if (tokens.Length == 7)
{
//v, ( vn | vt ) indices
v0 = int.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
v1 = int.Parse(tokens[3], System.Globalization.CultureInfo.InvariantCulture);
v2 = int.Parse(tokens[5], System.Globalization.CultureInfo.InvariantCulture);
mCurrentGroup.VIndices.Add(new Int3(v0 - 1, v1 - 1, v2 - 1));
v0 = int.Parse(tokens[2], System.Globalization.CultureInfo.InvariantCulture);
v1 = int.Parse(tokens[4], System.Globalization.CultureInfo.InvariantCulture);
v2 = int.Parse(tokens[6], System.Globalization.CultureInfo.InvariantCulture);
if (line.Contains("//"))
{
if (ParseNormals)
mCurrentGroup.NIndices.Add(new Int3(v0 - 1, v1 - 1, v2 - 1));
}
else
{
mCurrentGroup.TIndices.Add(new Int3(v0 - 1, v1 - 1, v2 - 1));
}
}
else if (tokens.Length == 4)
{
//v indices
v0 = int.Parse(tokens[1], System.Globalization.CultureInfo.InvariantCulture);
v1 = int.Parse(tokens[2], System.Globalization.CultureInfo.InvariantCulture);
v2 = int.Parse(tokens[3], System.Globalization.CultureInfo.InvariantCulture);
mCurrentGroup.VIndices.Add(new Int3(v0 - 1, v1 - 1, v2 - 1));
}
else
{
throw new Exception("Error parsing obj file");
}
break;
}
case "g":
{
string name = tokens[1].ToLowerInvariant();
mCurrentGroupName = name;
mCurrentGroup = new ObjGroupInfo(name) { mtrl = mCurrentMtrlName };
Groups.Add(mCurrentGroup);
break;
}
case "usemtl":
{
string name = tokens[1].ToLowerInvariant();
string groupname = mCurrentGroupName.ToLowerInvariant();
mCurrentGroup = new ObjGroupInfo(groupname);
Groups.Add(mCurrentGroup);
mCurrentGroup.mtrl = name;
mCurrentMtrlName = name;
break;
}
case "mtllib":
{
mCurrentMtrl = default(ObjFileMaterial);
string name = mDirectory + tokens[1];
ParseFile(ParseMtrlToken, name);
if (mCurrentMtrlName != null)
{
mMtrls.Add(mCurrentMtrlName, mCurrentMtrl);
}
mCurrentMtrlName = null;
break;
}
default:
break;
}
}
catch (Exception ex)
{
Console.WriteLine("Error parsing obj token: " + ex.Message);
}
}
private void ParseMtrlToken(string line, string[] tokens)
{
string token = tokens[0].ToLower();
try
{
switch (token)
{
case "newmtl":
{
if (mCurrentMtrlName != null)
{
mMtrls.Add(mCurrentMtrlName, mCurrentMtrl);
}
mCurrentMtrlName = tokens[1];
mCurrentMtrl = new ObjFileMaterial();
break;
}
case "ns":
{
mCurrentMtrl.Ns = float.Parse(tokens[1], CultureInfo.InvariantCulture);
break;
}
case "ni":
{
mCurrentMtrl.Ni = float.Parse(tokens[1], CultureInfo.InvariantCulture);
break;
}
case "d":
{
mCurrentMtrl.d = float.Parse(tokens[1], CultureInfo.InvariantCulture);
break;
}
case "tr":
{
mCurrentMtrl.Tr = float.Parse(tokens[1], CultureInfo.InvariantCulture);
break;
}
case "illum":
{
mCurrentMtrl.illum = float.Parse(tokens[1], CultureInfo.InvariantCulture);
break;
}
case "tf":
{
float x = float.Parse(tokens[1], CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], CultureInfo.InvariantCulture);
mCurrentMtrl.Tf = new Vector(x, y, z);
break;
}
case "ka":
{
float x = float.Parse(tokens[1], CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], CultureInfo.InvariantCulture);
mCurrentMtrl.Ka = new Vector(x, y, z);
break;
}
case "kd":
{
float x = float.Parse(tokens[1], CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], CultureInfo.InvariantCulture);
mCurrentMtrl.Kd = new Vector(x, y, z);
break;
}
case "ks":
{
float x = float.Parse(tokens[1], CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], CultureInfo.InvariantCulture);
mCurrentMtrl.Ks = new Vector(x, y, z);
break;
}
case "ke":
{
float x = float.Parse(tokens[1], CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], CultureInfo.InvariantCulture);
mCurrentMtrl.Ke = new Vector(x, y, z);
break;
}
case "map_ka":
{
//mCurrentMtrl.Map_Ka = tokens.Length < 2 ? tokens.Last() : line.Substring(line.IndexOf(tokens[1]));
mCurrentMtrl.SetMaps(ka: tokens.Length < 2 ? tokens.Last() : line.Substring(line.IndexOf(tokens[1])));
break;
}
case "map_kd":
{
//mCurrentMtrl.Map_Kd = tokens.Length < 2 ? tokens.Last() : line.Substring(line.IndexOf(tokens[1]));
mCurrentMtrl.SetMaps(kd: tokens.Length < 2 ? tokens.Last() : line.Substring(line.IndexOf(tokens[1])));
break;
}
case "map_ks":
{
mCurrentMtrl.SetMaps(ks: tokens.Length < 2 ? tokens.Last() : line.Substring(line.IndexOf(tokens[1])));
//Map_Ks = line.Substring(line.IndexOf(tokens[1]));
break;
}
case "map_refl":
{
mCurrentMtrl.SetMaps(ks: tokens.Length < 2 ? tokens.Last() : line.Substring(line.IndexOf(tokens[1])));
//Map_Ks = line.Substring(line.IndexOf(tokens[1]));
break;
}
case "bump":
{
mCurrentMtrl.SetMaps(mapd: tokens.Length < 2 ? tokens.Last() : line.Substring(line.IndexOf(tokens[1])));
//mCurrentMtrl.Map_d = line.Substring(line.IndexOf(tokens[1]));
break;
}
default:
break;
}
}
catch (Exception ex)
{
Console.WriteLine("Error parsing mtrl token: " + ex.Message);
}
}
public SceneGeometryInfo Load(string filename, bool invertNormals = false, params string[] additionalFiles)
{
var FileName = filename;
if (!File.Exists(filename))
{
throw new FileNotFoundException("OBJLoader Error: File not found", filename);
}
Positions = new List<Vector>();
Normals = new List<Vector>();
Texcoords = new List<Vector>();
mMtrls = new Dictionary<string, ObjFileMaterial>();
Groups = new List<ObjGroupInfo>();
mCurrentGroup = null;
mCurrentMtrlName = null;
mCurrentMtrl = default(ObjFileMaterial);
Console.Write("Loading: " + Path.GetFileName(FileName) + "... ");
//float start = Time.GetTimeInSecs();
mDirectory = Path.GetDirectoryName(FileName) + "\\";
mCurrentGroup = new ObjGroupInfo("default");
Groups.Add(mCurrentGroup);
ParseFile(ParseObjToken, FileName);
CreateNormals();
SceneGeometryInfo result = new SceneGeometryInfo();
result.Vertices = this.Positions.Select(i => (Point) i).ToArray();
result.Normals = this.Normals.ToArray();
result.TexCoords = this.Texcoords.ToArray();
var geo = new List<GeometryInfo>();
foreach (var objGroup in this.Groups)
{
if (!objGroup.VIndices.Any())
{
Console.WriteLine("No inidexz-");
continue;
}
if (string.IsNullOrWhiteSpace(objGroup.mtrl))
{
Debugger.Break();
}
geo.Add(new GeometryInfo()
{
IndexData = new IntStore(objGroup.VIndices.SelectMany(i=> new[] {i.v0, i.v1, i.v2})),
NormalIndexData = new IntStore(objGroup.NIndices.SelectMany(i=> new[] {i.v0, i.v1, i.v2})),
TextureIndexData = new IntStore(objGroup.TIndices.SelectMany(i => new[] { i.v0, i.v1, i.v2 })),
Name = objGroup.name,
MaterialName = objGroup.mtrl,
});
}
result.Geometry = geo.ToArray();
return result;
}
