private void ParseFile()
{
StreamReader sr = new StreamReader(_path, Encoding.Default);
string ln;
while (!sr.EndOfStream)
{
ln = sr.ReadLine();
if (ln.Length > 0 && ln[0] != '#')
{
LineTokenizer lk = new LineTokenizer(ln);
if (lk.Type == "mtllib")
{
// Loads cache
string mtlPath = OBJLoader.OBJGetFilePath(lk.Data, OBJFileInfo.Directory.FullName + Path.DirectorySeparatorChar, _meshName);
if (mtlPath != null)
{
materialCache = OBJLoader.LoadMTLFile(mtlPath);
}
}
else if ((lk.Type == "g" || lk.Type == "o") && _splitByMaterial == false)
{
cmesh = lk.Data;
if (!objectNames.Contains(cmesh))
{
objectNames.Add(cmesh);
}
}
else if (lk.Type == "usemtl")
{
cmaterial = lk.Data;
if (!materialNames.Contains(cmaterial))
{
materialNames.Add(cmaterial);
}
if (_splitByMaterial)
{
if (!objectNames.Contains(cmaterial))
{
objectNames.Add(cmaterial);
}
}
}
// Vertices
else if (lk.Type == "v")
{
vertices.Add(OBJLoader.ParseVectorFromCMPS(lk.Tokens));
}
// Vertex normals
else if (lk.Type == "vn")
{
normals.Add(OBJLoader.ParseVectorFromCMPS(lk.Tokens));
}
// Textures coordinates
else if (lk.Type == "vt")
{
uvs.Add(OBJLoader.ParseVectorFromCMPS(lk.Tokens));
}
// Polygonal face element
else if (lk.Type == "f")
{
int[] indexes = new int[lk.Tokens.Length - 1];
for (int i = 1; i < lk.Tokens.Length; i++)
{
string felement = lk.Tokens[i];
int vertexIndex = -1;
int normalIndex = -1;
int uvIndex = -1;
if (felement.Contains("//"))
{
//doubleslash, no UVS.
string[] elementComps = felement.Split('/');
vertexIndex = int.Parse(elementComps[0]) - 1;
normalIndex = int.Parse(elementComps[2]) - 1;
}
else if (felement.Count(x => x == '/') == 2)
{
//contains everything
string[] elementComps = felement.Split('/');
vertexIndex = int.Parse(elementComps[0]) - 1;
uvIndex = int.Parse(elementComps[1]) - 1;
normalIndex = int.Parse(elementComps[2]) - 1;
}
else if (!felement.Contains("/"))
{
//just vertex inedx
vertexIndex = int.Parse(felement) - 1;
}
else
{
//vertex and uv
string[] elementComps = felement.Split('/');
vertexIndex = int.Parse(elementComps[0]) - 1;
uvIndex = int.Parse(elementComps[1]) - 1;
}
string hashEntry = vertexIndex + "|" + normalIndex + "|" + uvIndex;
if (hashtable.ContainsKey(hashEntry))
{
indexes[i - 1] = hashtable[hashEntry];
}
else
{
//create a new hash entry
indexes[i - 1] = hashtable.Count;
hashtable[hashEntry] = hashtable.Count;
uvertices.Add(vertices[vertexIndex]);
if (normalIndex < 0 || (normalIndex > (normals.Count - 1)))
{
unormals.Add(Vector3.zero);
}
else
{
_hasNormals = true;
unormals.Add(normals[normalIndex]);
}
if (uvIndex < 0 || (uvIndex > (uvs.Count - 1)))
{
uuvs.Add(Vector2.zero);
}
else
{
uuvs.Add(uvs[uvIndex]);
}
}
}
if (indexes.Length < 5 && indexes.Length >= 3)
{
OBJFace f1 = new OBJFace();
f1.materialName = cmaterial;
f1.indexes = new int[] { indexes[0], indexes[1], indexes[2] };
f1.meshName = (_splitByMaterial) ? cmaterial : cmesh;
faceList.Add(f1);
if (indexes.Length > 3)
{
OBJFace f2 = new OBJFace();
f2.materialName = cmaterial;
f2.meshName = (_splitByMaterial) ? cmaterial : cmesh;
f2.indexes = new int[] { indexes[2], indexes[3], indexes[0] };
faceList.Add(f2);
}
}
}
}
}
}