internal static MeshData Import(String filePath)
{
StreamReader fileStream = new StreamReader(filePath);
MeshData meshData = new MeshData();
List<string> invalidData = new List<string>();
while (!fileStream.EndOfStream)
{
String line = fileStream.ReadLine().Trim();
if (String.IsNullOrEmpty(line) || line[0] == '#')
continue;
String[] data = line.Split(new[] { ' ' }, 2, StringSplitOptions.RemoveEmptyEntries);
if (data.Length < 2)
{
invalidData.Add(line);
continue;
}
KeyValuePair<string, string> parsedLineData = new KeyValuePair<string, string>(data[0], data[1]);
switch (parsedLineData.Key)
{
case "v":
//vertex
if (!meshData.AddVertex(parsedLineData.Value))
invalidData.Add(line);
break;
case "f":
//face
if (!meshData.AddFace(parsedLineData.Value))
invalidData.Add(line);
break;
case "g":
//group
if (!meshData.AddGroup(parsedLineData.Value))
invalidData.Add(line);
break;
case "vn":
//vertex normal
if (!meshData.AddNormal(parsedLineData.Value))
invalidData.Add(line);
break;
case "vt":
//texture
if (!meshData.AddTexture(parsedLineData.Value))
invalidData.Add(line);
break;
case "mtllib":
//material library
if (!meshData.AddMaterial(parsedLineData.Value))
invalidData.Add(line);
break;
case "usemtl":
//use material library
meshData.SetMaterial(parsedLineData.Value);
break;
default:
invalidData.Add(line);
break;
}
}
return meshData;
}
internal static bool Export(MeshData meshData, String filePath)
{
try
{
StreamWriter file = File.CreateText(filePath);
file.WriteLine("# 3D Library generated .obj file");
file.WriteLine("# DesignScript Studio #");
file.WriteLine("##");
file.WriteLine();
foreach (var vertex in meshData.Vertices)
file.WriteLine("v " + vertex.X + " " + vertex.Y + " " + vertex.Z);
file.WriteLine("# " + meshData.Vertices.Count + " vertices");
file.WriteLine();
foreach (var normal in meshData.Normals)
file.WriteLine("vn " + normal.X + " " + normal.Y + " " + normal.Z);
file.WriteLine("# " + meshData.Normals.Count + " vertex normals");
file.WriteLine();
//foreach (var texture in meshData.Textures)
// file.WriteLine("vt " + texture.X + " " + texture.Y);
//file.WriteLine("# " + meshData.Textures.Count + " texture vertices");
foreach (var group in meshData.Groups)
{
file.WriteLine("g " + group.Name);
foreach (var face in group.Faces)
{
file.Write("f");
for (int i = 0; i < face.VertexArray.Length; ++i)
file.Write(" " + face.VertexArray[i] + "/" + (face.TextureArray[i] != 0 ? face.TextureArray[i].ToString() : "") + "/" + (face.NormalArray[i] != 0 ? face.NormalArray[i].ToString() : ""));
file.WriteLine();
}
file.WriteLine("# " + group.Faces.Count + " faces");
file.WriteLine();
}
file.Close();
return true;
}
catch (System.UnauthorizedAccessException e)
{
throw new System.UnauthorizedAccessException(e.Message);
}
catch
{
throw new ArgumentException("Path is invalid");
}
}
