protected float LoadObj()
{
Positions.Clear();
Normals.Clear();
Texcoords.Clear();
Groups.Clear();
mMtrls.Clear();
mCurrentGroup = null;
mCurrentMtrlName = null;
mCurrentMtrl = default(ObjMaterial);
float start = 0.0f;
mDirectory = Path.GetDirectoryName(FileName) + "\\";
mCurrentGroup = new ObjGroup("default", "default");
Groups.Add(mCurrentGroup);
ParseFile(ParseObjToken, FileName);
foreach (var objGroup in Groups)
{
if (objGroup.TexCoords.Any())
{
Texcoords.AddRange(objGroup.TexCoords);//NormalizeTexCoords(
}
}
CreateNormals();
return(start);
}
protected bool ValidateGroup(ObjGroup group)
{
for (int i = 0; i < group.VIndices.Count; i++)
{
System.Diagnostics.Debug.Assert(group.VIndices[i].X < Positions.Count);
System.Diagnostics.Debug.Assert(group.VIndices[i].Y < Positions.Count);
System.Diagnostics.Debug.Assert(group.VIndices[i].Z < Positions.Count);
if (i < group.NIndices.Count && group.NIndices.Count > 0 && Normals.Count > 0)
{
System.Diagnostics.Debug.Assert(group.NIndices[i].X < Normals.Count);
System.Diagnostics.Debug.Assert(group.NIndices[i].Y < Normals.Count);
System.Diagnostics.Debug.Assert(group.NIndices[i].Z < Normals.Count);
}
if (i < group.TIndices.Count && group.TIndices.Count > 0 && Texcoords.Count > 0)
{
System.Diagnostics.Debug.Assert(group.TIndices[i].X < Texcoords.Count);
System.Diagnostics.Debug.Assert(group.TIndices[i].Y < Texcoords.Count);
System.Diagnostics.Debug.Assert(group.TIndices[i].Z < Texcoords.Count);
}
}
return(true);
}
protected void ParseObjToken(string line, string[] tokens)
{
string token = tokens[0].ToLower();
int lastObjTexCoord = 0;
try
{
switch (token)
{
case "v":
{
float x = float.Parse(tokens[1], CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], CultureInfo.InvariantCulture);
Vector3 p = new Vector3(x * Scale, y * Scale, z * Scale);
BBox.AddFloat3(p);
Positions.Add(p);
break;
}
case "vn":
{
if (ParseNormals)
{
float x = float.Parse(tokens[1], CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], CultureInfo.InvariantCulture);
float z = float.Parse(tokens[3], CultureInfo.InvariantCulture);
Normals.Add(new Vector3(x, y, z));
}
break;
}
case "vt":
{
float x = float.Parse(tokens[1], CultureInfo.InvariantCulture);
float y = float.Parse(tokens[2], CultureInfo.InvariantCulture);
//Texcoords.Add(new Vector2(x,y));
mCurrentGroup.TexCoords.Add(new Vector2(x, y));
break;
}
case "f":
{
int delta = 1;
int v0 = 0, v1 = 0, v2 = 0;
if (tokens.Length >= 10)
{
//full v, vn, vt indices
v0 = int.Parse(tokens[1]);
v1 = int.Parse(tokens[4]);
v2 = int.Parse(tokens[7]);
mCurrentGroup.VIndices.Add(new Int3(v0 - delta, v1 - delta, v2 - delta));
v0 = int.Parse(tokens[2]);
v1 = int.Parse(tokens[5]);
v2 = int.Parse(tokens[8]);
mCurrentGroup.TIndices.Add(new Int3(v0 - delta, v1 - delta, v2 - delta));
if (ParseNormals)
{
v0 = int.Parse(tokens[3]);
v1 = int.Parse(tokens[6]);
v2 = int.Parse(tokens[9]);
mCurrentGroup.NIndices.Add(new Int3(v0 - delta, v1 - delta, v2 - delta));
}
}
else if (tokens.Length >= 7)
{
v0 = int.Parse(tokens[1]);
v1 = int.Parse(tokens[3]);
v2 = int.Parse(tokens[5]);
mCurrentGroup.VIndices.Add(new Int3(v0 - delta, v1 - delta, v2 - delta));
v0 = int.Parse(tokens[2]);
v1 = int.Parse(tokens[4]);
v2 = int.Parse(tokens[6]);
if (line.Contains("//"))
{
if (ParseNormals)
{
mCurrentGroup.NIndices.Add(new Int3(v0 - delta, v1 - delta, v2 - delta));
}
}
else
{
mCurrentGroup.TIndices.Add(new Int3(v0 - delta, v1 - delta, v2 - delta));
}
}
else if (tokens.Length >= 4)
{
//v indices
v0 = int.Parse(tokens[1]);
v1 = int.Parse(tokens[2]);
v2 = int.Parse(tokens[3]);
mCurrentGroup.VIndices.Add(new Int3(v0 - delta, v1 - delta, v2 - delta));
}
break;
}
case "g":
{
if (!ParseMaterials)
{
break;
}
string name = tokens[1];
mCurrentGroupName = name;
lastObjTexCoord = Texcoords.Count;
mCurrentGroup = new ObjGroup(name, name)
{
mtrl = mCurrentMtrlName
};
Groups.Add(mCurrentGroup);
break;
}
case "usemtl":
{
if (!ParseMaterials)
{
break;
}
string name = tokens[1];
//if (mCurrentGroup != null){ Texcoords.AddRange(NormalizeTexCoords(mCurrentGroup.TexCoords));}
//string groupname = mCurrentGroupName + name;
//mCurrentGroup = new ObjGroup( groupname, mCurrentGroupName );
//Groups.Add( mCurrentGroup );
mCurrentMtrlName = name;
mCurrentGroup.mtrl = name;
break;
}
case "mtllib":
{
if (!ParseMaterials)
{
break;
}
mCurrentMtrl = default(ObjMaterial);
string name = mDirectory + tokens[1];
ParseFile(ParseMtrlToken, name);
if (mCurrentMtrlName != null)
{
mMtrls.Add(mCurrentMtrlName, mCurrentMtrl);
}
mCurrentMtrlName = null;
break;
}
default:
break;
}
}
catch (Exception ex)
{
Trace.WriteLine("Error parsing obj token: " + ex.Message);
}
}