public OBJMaterial GetOrCreateMaterial(string name)
{
for (int i = 0; i < Materials.Count; i++)
{
if (Materials[i].Name == name)
{
return(Materials[i]);
}
}
var mat = new OBJMaterial {
Name = name
};
Materials.Add(mat);
return(mat);
}
/// <summary>
/// When null is given, the default SubObject
/// </summary>
/// <param name="mat"></param>
/// <returns></returns>
public SubObject GetOrCreateSubObject(OBJMaterial mat)
{
if (mat == null)
{
return(DefaultSubObject);
}
for (int i = 0; i < SubObjects.Count; i++)
{
if (SubObjects[i].Material == mat)
{
return(SubObjects[i]);
}
}
SubObject obj = new SubObject();
SubObjects.Add(obj);
obj.Material = mat;
return(obj);
}
public void ImportObjFile(Stream fileStream)
{
StreamReader textReader = new StreamReader(fileStream);
Vertices = new List <Vector3>();
Normals = new List <Vector3>();
TexCoords = new List <Vector3>();
Groups = new List <OBJGroup>();
Materials = new List <OBJMaterial>();
activeGroup = null;
Vertices.Add(Vector3.Zero); // Indices following are 1 indexed, so add a dummy element as 0-th index
Normals.Add(Vector3.Zero);
TexCoords.Add(Vector3.Zero);
/*List<Vector3> positions = new List<Vector3>();
* List<Vector3> normals = new List<Vector3>();
* List<Vector2> textureCoords = new List<Vector2>();*/
string line = null;
while (textReader.Peek() != -1)
{
line = textReader.ReadLine();
//line = line.Replace('.', ',');
if (line.StartsWith("#"))
{
continue;
}
string[] pieces = line.Split(' ');
string cmd = pieces[0];
int dataStart = 1;
while (pieces.Length > dataStart && pieces[dataStart] == "")
{
dataStart++;
}
switch (cmd)
{
case "v":
Vector3 v;
v.X = float.Parse(pieces[dataStart + 0], culture.NumberFormat);
v.Y = float.Parse(pieces[dataStart + 1], culture.NumberFormat);
v.Z = float.Parse(pieces[dataStart + 2], culture.NumberFormat);
Vertices.Add(v);
break;
case "vn":
Vector3 vn;
vn.X = float.Parse(pieces[dataStart + 0], culture.NumberFormat);
vn.Y = float.Parse(pieces[dataStart + 1], culture.NumberFormat);
vn.Z = float.Parse(pieces[dataStart + 2], culture.NumberFormat);
Normals.Add(vn);
break;
case "vt":
Vector3 vt;
vt.X = float.Parse(pieces[dataStart + 0], culture.NumberFormat);
vt.Y = float.Parse(pieces[dataStart + 1], culture.NumberFormat);
vt.Z = pieces.Length < 4 ? 0 : float.Parse(pieces[dataStart + 2], culture.NumberFormat);
TexCoords.Add(vt);
break;
case "g":
activeGroup = getOrCreateGroup(pieces[dataStart]);
updateActiveSubObject();
/*if (meshPart.AdditionalData.Name != null || meshPart.AdditionalData.Name == "")
* {
* meshPart = new EditorMeshPart();
* meshPart.AdditionalData.Name = pieces[1];
* createMeshPart();
* }
* meshPart = new EditorMeshPart();
* meshPart.AdditionalData.Name = pieces[1];*/
break;
case "usemtl":
activeMaterial = GetOrCreateMaterial(pieces[dataStart]);
updateActiveSubObject();
break;
case "f":
Face face = new Face();
//TODO: check first index
face.V1 = ParseFaceVertex(pieces[dataStart + 0]);
face.V2 = ParseFaceVertex(pieces[dataStart + 1]);
face.V3 = ParseFaceVertex(pieces[dataStart + 2]);
if (activeSubObject == null)
{
throw new InvalidOperationException(
"A face was found that does not seem to belong to any object??");
}
activeSubObject.Faces.Add(face);
break;
case "mtllib":
Stream matStream;
if (materialFileStreams.TryGetValue(pieces[dataStart], out matStream))
{
importMaterialFile(matStream);
}
else
{
Console.WriteLine("OBJ Material Library not found: " + pieces[dataStart]);
}
break;
}
}
//createMeshPart();
//return mesh;
materialFileStreams = new Dictionary <string, Stream>();
}
private void importMaterialFile(Stream fileStream)
{
StreamReader textReader = new StreamReader(fileStream);
OBJMaterial readingMaterial = null;
string line = null;
while (textReader.Peek() != -1)
{
//TODO: remove tabs!!!
//TODO: make a seperate reader for this kind of file
line = textReader.ReadLine().Trim(new[] { ' ', '\t' });
//line = line.Replace('.', ',');
if (line.StartsWith("#"))
{
continue;
}
string[] pieces = line.Split(' ');
string cmd = pieces[0];
int dataStart = 1;
while (pieces.Length > dataStart && pieces[dataStart] == "")
{
dataStart++;
}
switch (cmd)
{
case "newmtl":
readingMaterial = GetOrCreateMaterial(pieces[dataStart]);
break;
case "Ns":
if (readingMaterial == null)
{
throw new InvalidOperationException("File format invalid!");
}
readingMaterial.SpecularExponent = float.Parse(pieces[dataStart], culture);
break;
case "Ka":
if (readingMaterial == null)
{
throw new InvalidOperationException("File format invalid!");
}
readingMaterial.AmbientColor = readColor(pieces, dataStart);
break;
case "Kd":
if (readingMaterial == null)
{
throw new InvalidOperationException("File format invalid!");
}
readingMaterial.DiffuseColor = readColor(pieces, dataStart);
break;
case "Ks":
if (readingMaterial == null)
{
throw new InvalidOperationException("File format invalid!");
}
readingMaterial.SpecularColor = readColor(pieces, dataStart);
break;
case "map_Ka":
if (readingMaterial == null)
{
throw new InvalidOperationException("File format invalid!");
}
string pathKa = line.Substring(line.IndexOf("map_Ka") + ("map_Ka").Length).Trim();
readingMaterial.AmbientMap = fixFileUrl(pathKa);
break;
case "map_Kd":
if (readingMaterial == null)
{
throw new InvalidOperationException("File format invalid!");
}
string pathKd = line.Substring(line.IndexOf("map_Kd") + ("map_Kd").Length).Trim();
readingMaterial.DiffuseMap = fixFileUrl(pathKd);
break;
case "map_Ks":
if (readingMaterial == null)
{
throw new InvalidOperationException("File format invalid!");
}
string pathKs = line.Substring(line.IndexOf("map_Ks") + ("map_Ks").Length).Trim();
readingMaterial.SpecularMap = fixFileUrl(pathKs);
break;
case "map_bump":
if (readingMaterial == null)
{
throw new InvalidOperationException("File format invalid!");
}
string pathbump = line.Substring(line.IndexOf("map_bump") + ("map_bump").Length).Trim();
readingMaterial.BumpMap = fixFileUrl(pathbump);
break;
}
}
//createMeshPart();
//return mesh;
materialFileStreams = new Dictionary <string, Stream>();
}
