/// <summary>
/// Exports the SubDivision meshes provided by the user to an .Obj file. Each Subvision Mesh
/// is represented by a group. Groups are automatically named.
/// </summary>
/// <param name="mesh">The SubDivision Mesh array to be exported in one file</param>
/// <param name="filePath">The meshes are exported to this file Path, or the active directory if only file name is provided</param>
/// <returns></returns>
public static bool ExportToOBJ(SubDivisionMesh[] mesh, string filePath)
{
if (mesh == null || mesh.Length == 0)
{
throw new System.ArgumentNullException("mesh");
}
if (string.IsNullOrWhiteSpace(filePath))
{
throw new System.ArgumentNullException("filePath");
}
MeshData meshData = new MeshData();
for (int i = 0; i < mesh.Length; ++i)
{
meshData.AddGroup("Group_" + i);
foreach (var vertices in mesh[i].FaceIndices)
{
for (int j = 0; j < vertices.Length; ++j)
{
vertices[j] += meshData.Vertices.Count + 1;
}
meshData.Groups[i].AddFace(vertices);
}
meshData.Vertices.AddRange(mesh[i].Vertices);
}
if (!filePath.EndsWith(".obj"))
{
filePath += ".obj";
}
if (!Path.IsPathRooted(filePath))
{
string foldername = Path.GetDirectoryName(GeometrySettings.RootModulePath);
filePath = Path.Combine(foldername, filePath);
}
return(ObjHandler.Export(meshData, filePath));
}
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 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;
}
