public static void Read(string fileName, ConversionSettings conversionSettings, ref DisplayList dsp, out Dictionary <string, TextureInfo> allMaterials, out string[] messages)
{
List <string> messageList = new List <string>();
string currentObject = "";
Subset LastFrame = null;
List <Subset> Frames = new List <Subset>();
List <Vertex> Vertices = new List <Vertex>();
List <int> Indices = new List <int>();
List <FaceVertex> faceVertices = new List <FaceVertex>();
List <Vertex> dspVertexBuffer = new List <Vertex>();
List <int[]> dspIndexBuffers = new List <int[]>();
List <int> dspTextureKeys = new List <int>();
int[] dspIndices;
int minVertexIndex = 0;
List <Vector3> positions = new List <Vector3>();
List <Vector2> texCoords = new List <Vector2>();
List <Vector3> normals = new List <Vector3>();
allMaterials = new Dictionary <string, TextureInfo>();
allMaterials["<Undefined>"] = new TextureInfo(null);
string[] fileNameSplit = fileName.Split(new char[] { '/', '\\' });
string fileRelativePath = fileName.Remove(fileName.Length - (fileNameSplit[fileNameSplit.Length - 1].Length), fileNameSplit[fileNameSplit.Length - 1].Length);
if (!System.IO.File.Exists(fileName))
{
messages = new string[] { "File " + fileName + " was not found." };
return;
}
StreamReader rd = new StreamReader(fileName);
StreamReader materialReader = null;
while (!rd.EndOfStream)
{
string line = rd.ReadLine();
string[] split = line.Split(' ');
if (split[0] == "mtllib")
{
materialReader = new StreamReader(fileRelativePath + line.Remove(0, split[0].Length + 1));
string currentMtl = null;
while (!materialReader.EndOfStream)
{
string matLine = materialReader.ReadLine();
string[] matSplit = matLine.Split(' ');
if (matSplit[0] == "newmtl")
{
currentMtl = matLine.Remove(0, matSplit[0].Length);
}
if (matSplit[0] == "map_Kd")
{
TextureInfo newTex;
string fullPath = matLine.Remove(0, matSplit[0].Length).Trim();
if (fullPath[1] != ':')
{
fullPath = fileRelativePath + fullPath;
}
allMaterials.Add(currentMtl, newTex = new TextureInfo(fullPath));
}
}
}
else if (split[0] == "o") //Object
{
if (LastFrame == null)
{
LastFrame = new Subset();
}
currentObject = split[1];
}
else if (split[0] == "v") // Vertex
{
positions.Add(cvt.ParseVector3(split, 1));
}
else if (split[0] == "vn")// Vertex Normal
{
normals.Add(cvt.ParseVector3(split, 1));
}
else if (split[0] == "vt") // Vertex TexCoord
{
texCoords.Add(cvt.parseVector2(split, 1));
}
else if (split[0] == "usemtl")
{
LastFrame.VertexBuffer = Vertices.ToArray();
LastFrame.IndexBuffer = Indices.ToArray();
dspIndices = new int[LastFrame.IndexBuffer.Length];
for (int i = 0; i < LastFrame.IndexBuffer.Length; i += 3)
{
dspIndices[i] = LastFrame.IndexBuffer[i + 2] + minVertexIndex;
dspIndices[i + 1] = LastFrame.IndexBuffer[i + 1] + minVertexIndex;
dspIndices[i + 2] = LastFrame.IndexBuffer[i] + minVertexIndex;
}
if (Indices.Count > 0)
{
dspIndexBuffers.Add(dspIndices);
LastFrame.CreatePatches();
Frames.Add(LastFrame);
}
Indices.Clear();
LastFrame = new Subset();
string mtlName = line.Remove(0, split[0].Length);
if (!allMaterials.TryGetValue(mtlName, out LastFrame.Texture))
{
messageList.Add("Object " + currentObject + " has unassigned faces.");
LastFrame.Texture = allMaterials["<Undefined>"];
}
}
else if (split[0] == "f") // Face
{
int i0 = 0, ix = 0;
for (int i = 1; i < split.Length; i++)
{
string[] vertexIndices = split[i].Split('/');
FaceVertex faceVertex = new FaceVertex();
int.TryParse(vertexIndices[0], out faceVertex.Vertex);
if (vertexIndices.Length > 1)
{
int.TryParse(vertexIndices[1], out faceVertex.Texture);
}
if (vertexIndices.Length > 2)
{
int.TryParse(vertexIndices[2], out faceVertex.Normal);
}
int index = 0;
foreach (FaceVertex v in faceVertices)
{
if (v.Vertex == faceVertex.Vertex && v.Texture == faceVertex.Texture && v.Normal == faceVertex.Normal)
{
break;
}
index++;
}
if (i > 3)
{
Indices.Add(i0);
Indices.Add(ix);
}
Indices.Add(index);
if (i == 1)
{
i0 = index;
}
ix = index;
if (index == faceVertices.Count)
{
faceVertices.Add(faceVertex);
Vertex newVertex;
Vector2 texCoord = Vector2.Empty;
if (faceVertex.Texture > 0)
{
texCoord = texCoords[faceVertex.Texture - 1];
}
Vector3 normal = Vector3.Empty;
if (faceVertex.Normal > 0)
{
normal = normals[faceVertex.Normal - 1];
}
Vertices.Add(newVertex = new Vertex(positions[faceVertex.Vertex - 1], texCoord, normal));
dspVertexBuffer.Add(newVertex);
}
}
}
}
rd.BaseStream.Close();
materialReader.Close();
LastFrame.IndexBuffer = Indices.ToArray();
LastFrame.VertexBuffer = Vertices.ToArray();
dspIndices = new int[LastFrame.IndexBuffer.Length];
for (int i = 0; i < LastFrame.IndexBuffer.Length; i += 3)
{
dspIndices[i] = LastFrame.IndexBuffer[i + 2] + minVertexIndex;
dspIndices[i + 1] = LastFrame.IndexBuffer[i + 1] + minVertexIndex;
dspIndices[i + 2] = LastFrame.IndexBuffer[i] + minVertexIndex;
}
dspIndexBuffers.Add(dspIndices);
LastFrame.CreatePatches();
Frames.Add(LastFrame);
dsp.subsets = Frames.ToArray();
messages = messageList.ToArray();
}