protected override void _Read(BinaryReader reader)
{
List <Vector3> vertices = new List <Vector3>();
List <Vector3> normals = new List <Vector3>();
List <Vector2> uvs = new List <Vector2>();
Dictionary <int, Vertex> nodeVertices = new Dictionary <int, Vertex>();
MeshFace currentFace = null;
int currentTextureIndex = -1;
MTL mtl = null;
Textures.Clear();
RootNode = new ModelNode();
RootNode.HasMesh = true;
bool hasUV = false;
bool hasNormals = false;
bool faceTextureChanged = false;
string[] lines = reader.ReadToEnd().Split('\n');
foreach (string line in lines)
{
if (line.StartsWith("#") || String.IsNullOrEmpty(line))
{
continue;
}
else if (line.StartsWith("mtllib "))
{
string[] values = line.Split(' ');
if (values.Length < 2)
{
continue;
}
string mtlPath = "";
string dir = Path.GetDirectoryName(FilePath);
mtlPath = String.Format("{0}\\{1}", Path.GetDirectoryName(FilePath), values[1]);
if (File.Exists(mtlPath))
{
mtl = new MTL(mtlPath);
Textures = mtl.Textures;
}
}
else if (line.StartsWith("v "))
{
string[] values = line.Split(' ');
if (values.Length < 4)
{
continue;
}
Vector3 vertex = new Vector3();
vertex.X = float.Parse(values[1], m_cultureInfo);
vertex.Y = float.Parse(values[2], m_cultureInfo);
vertex.Z = float.Parse(values[3], m_cultureInfo);
RootNode.VertexPositions.Add(vertex);
}
else if (line.StartsWith("vt "))
{
string[] values = line.Split(' ');
if (values.Length < 3)
{
continue;
}
Vector2 uv = new Vector2();
uv.X = float.Parse(values[1], m_cultureInfo);
uv.Y = float.Parse(values[2], m_cultureInfo);
RootNode.VertexUVs.Add(uv);
}
else if (line.StartsWith("vn "))
{
string[] values = line.Split(' ');
if (values.Length < 4)
{
continue;
}
Vector3 normal = new Vector3();
normal.X = float.Parse(values[1], m_cultureInfo);
normal.Y = float.Parse(values[2], m_cultureInfo);
normal.Z = float.Parse(values[3], m_cultureInfo);
RootNode.VertexNormals.Add(normal);
}
else if (line.StartsWith("f "))
{
if (currentFace == null)
{
continue;
}
if (line.Contains("//"))
{
string[] stringSeparators = new string[] { "//" };
string[] values = line.Split(' ');
if (values.Length < 4)
{
continue;
}
string[] vert1Values = values[1].Split(stringSeparators, StringSplitOptions.None);
string[] vert2Values = values[2].Split(stringSeparators, StringSplitOptions.None);
string[] vert3Values = values[3].Split(stringSeparators, StringSplitOptions.None);
currentFace.PositionIndices.Add((ushort)(int.Parse(vert1Values[0]) - 1));
currentFace.NormalIndices.Add((ushort)(int.Parse(vert1Values[1]) - 1));
currentFace.PositionIndices.Add((ushort)(int.Parse(vert2Values[0]) - 1));
currentFace.NormalIndices.Add((ushort)(int.Parse(vert2Values[1]) - 1));
currentFace.PositionIndices.Add((ushort)(int.Parse(vert3Values[0]) - 1));
currentFace.NormalIndices.Add((ushort)(int.Parse(vert3Values[1]) - 1));
}
else if (line.Contains("/"))
{
string[] stringSeparators = new string[] { "/" };
string[] values = line.Split(' ');
if (values.Length < 4)
{
continue;
}
string[] vert1Values = values[1].Split(stringSeparators, StringSplitOptions.None);
string[] vert2Values = values[2].Split(stringSeparators, StringSplitOptions.None);
string[] vert3Values = values[3].Split(stringSeparators, StringSplitOptions.None);
currentFace.PositionIndices.Add((ushort)(int.Parse(vert1Values[0]) - 1));
currentFace.UVIndices.Add((ushort)(int.Parse(vert1Values[1]) - 1));
if (vert1Values.Length > 2)
{
currentFace.NormalIndices.Add((ushort)(int.Parse(vert1Values[2]) - 1));
}
currentFace.PositionIndices.Add((ushort)(int.Parse(vert2Values[0]) - 1));
currentFace.UVIndices.Add((ushort)(int.Parse(vert2Values[1]) - 1));
if (vert2Values.Length > 2)
{
currentFace.NormalIndices.Add((ushort)(int.Parse(vert2Values[2]) - 1));
}
currentFace.PositionIndices.Add((ushort)(int.Parse(vert3Values[0]) - 1));
currentFace.UVIndices.Add((ushort)(int.Parse(vert3Values[1]) - 1));
if (vert3Values.Length > 2)
{
currentFace.NormalIndices.Add((ushort)(int.Parse(vert3Values[2]) - 1));
}
}
else
{
string[] values = line.Split(' ');
if (values.Length < 4)
{
continue;
}
currentFace.PositionIndices.Add((ushort)(int.Parse(values[0]) - 1));
currentFace.PositionIndices.Add((ushort)(int.Parse(values[1]) - 1));
currentFace.PositionIndices.Add((ushort)(int.Parse(values[2]) - 1));
}
}
else if (line.StartsWith("usemtl "))
{
if (mtl == null)
{
continue;
}
string[] values = line.Split(' ');
if (values.Length < 2)
{
continue;
}
if (faceTextureChanged)
{
RootNode.Faces.Add(currentFace);
}
currentFace = new MeshFace();
currentTextureIndex = mtl.GetMaterialTextureIndex(values[1]);
currentFace.TextureIndex = (uint)currentTextureIndex;
faceTextureChanged = true;
}
else if (line.StartsWith("o ") || line.StartsWith("g "))
{
if (currentFace != null)
{
RootNode.Faces.Add(currentFace);
}
currentFace = new MeshFace();
faceTextureChanged = false;
}
}
RootNode.Faces.Add(currentFace);
RootNode.ResolveFaceTextures(Textures);
}
private void WriteNode(BinaryWriter writer, ModelNode node)
{
}
