public static void CreateWavefrontOBJFile(WavefrontObject wavefront, string filename)
{
FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.Read);
StreamWriter sw = new StreamWriter(fs);
sw.NewLine = "\r\n";
if (wavefront.VertexCount > 0)
foreach (Vector3 v in wavefront.Vertices)
{
sw.WriteLine("v " + Math.Round((double)v.X, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)v.Y, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)v.Z, 5, MidpointRounding.ToEven).ToString());
}
sw.WriteLine("# " + wavefront.VertexCount.ToString() + " Vertices");
sw.WriteLine();
if (wavefront.TexcoordCount > 0)
foreach (Vector2 vt in wavefront.Texcoords)
{
sw.WriteLine("vt " + Math.Round((double)vt.X, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)vt.Y, 5, MidpointRounding.ToEven).ToString());
}
sw.WriteLine("# " + wavefront.TexcoordCount.ToString() + " Texcoords");
sw.WriteLine();
if (wavefront.NormalCount > 0)
foreach (Vector3 vn in wavefront.Normals)
{
sw.WriteLine("vn " + Math.Round((double)vn.X, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)vn.Y, 5, MidpointRounding.ToEven).ToString() + " " + Math.Round((double)vn.Z, 5, MidpointRounding.ToEven).ToString());
}
sw.WriteLine("# " + wavefront.NormalCount.ToString() + " Normals");
sw.WriteLine();
if (wavefront.FaceCount > 0)
{
Dictionary<int, string> MaterialNames;
MaterialNames = wavefront.Materials.ToDictionary(x => x.Value, x => x.Key);
int[] Faces;
string curMat = "";
string newMat;
Face temp;
for (int Group = 0; Group < wavefront.GroupCount; Group++)
{
Faces = wavefront.GetFaceIndicesUsingGroupID(Group);
for (int Face = 0; Face < Faces.Length; Face++)
{
temp = wavefront.Faces[Faces[Face]];
newMat = MaterialNames[temp.MaterialID];
if (curMat != newMat)
{
curMat = newMat;
sw.WriteLine("usemtl " + curMat);
}
sw.WriteLine("f " + temp.ToString());
}
sw.WriteLine("# " + Faces.Length.ToString() + " Faces");
sw.WriteLine();
curMat = "";
}
}
sw.Dispose();
fs.Dispose();
}
