/// <summary>
/// Query media informations.
/// </summary>
/// <param name="path">
/// A <see cref="String"/> that specify the media path.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// A <see cref="SceneObjectInfo"/> containing information about the specified media.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/> or <paramref name="criteria"/> is null.
/// </exception>
public SceneObjectInfo QueryInfo(Stream stream, SceneObjectCodecCriteria criteria)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
SceneObjectInfo info = new SceneObjectInfo();
return(info);
}
/// <summary>
/// Load media from stream.
/// </summary>
/// <param name="stream">
/// A <see cref="Stream"/> where the media data is stored.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// An <see cref="SceneObject"/> holding the media data.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/> or <paramref name="criteria"/> is null.
/// </exception>
public SceneObject Load(Stream stream, SceneObjectCodecCriteria criteria)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (criteria == null)
{
throw new ArgumentNullException("criteria");
}
// Load OBJ information
ObjContext objContext = LoadOBJ(stream, criteria);
// Process OBJ information
return(ProcessOBJ(objContext));
}
private static ObjContext LoadOBJ(Stream stream, SceneObjectCodecCriteria criteria)
{
FileStream fileStream = stream as FileStream;
if (fileStream == null)
{
throw new InvalidOperationException("only FileStream are supported");
}
ObjContext objContext = new ObjContext(fileStream.Name);
using (StreamReader sr = new StreamReader(stream)) {
string objLine;
while ((objLine = sr.ReadLine()) != null)
{
// Trim spaces
objLine = objLine.Trim();
// Skip empty lines and comments
if (objLine.Length == 0 || _CommentLine.IsMatch(objLine))
{
continue;
}
Match commandMatch = _ObjCommandLine.Match(objLine);
if (commandMatch.Success == false)
{
continue;
}
string command = commandMatch.Groups["Command"].Value;
string tokens = commandMatch.Groups["Tokens"].Value.Trim();
string[] token = Regex.Split(tokens, " +");
switch (command)
{
case "mtllib":
ParseMaterialLib(objContext, token);
break;
case "usemtl":
if (objContext.Groups.Count == 0)
{
break;
}
ObjMaterial objMaterial;
if (objContext.Materials.TryGetValue(token[0], out objMaterial) == false)
{
throw new InvalidOperationException(String.Format("unknown material '{0}'", token[0]));
}
objContext.Groups[objContext.Groups.Count - 1].Geometries.Add(new ObjGeometry(objMaterial));
break;
case "v":
ParseVertex(objContext, token);
break;
case "vn":
ParseNormal(objContext, token);
break;
case "vt":
ParseTexCoord(objContext, token);
break;
case "f":
ParseFace(objContext, token);
break;
case "s":
// ?
break;
case "g":
if (token.Length < 1)
{
throw new InvalidOperationException();
}
objContext.Groups.Add(new ObjGroup(token[0]));
break;
case "vl":
case "vp":
// Ignored
break;
default:
throw new InvalidOperationException(String.Format("unknown OBJ command {0}", command));
}
}
}
return(objContext);
}
/// <summary>
/// Save media to stream.
/// </summary>
/// <param name="stream">
/// A <see cref="IO.Stream"/> which stores the media data.
/// </param>
/// <param name="sceneObject">
/// A <see cref="SceneObject"/> holding the data to be stored.
/// </param>
/// <param name="format">
/// A <see cref="String"/> that specify the media format to used for saving <paramref name="sceneObject"/>.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an sceneObject stream.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/>, <paramref name="sceneObject"/> or <paramref name="criteria"/> is null.
/// </exception>
public void Save(Stream stream, SceneObject sceneObject, string format, SceneObjectCodecCriteria criteria)
{
throw new NotImplementedException();
}
/// <summary>
/// Save media to stream.
/// </summary>
/// <param name="path">
/// A <see cref="String"/> that specify the media path.
/// </param>
/// <param name="sceneObject">
/// A <see cref="SceneObject"/> holding the data to be stored.
/// </param>
/// <param name="format">
/// A <see cref="String"/> that specify the media format to used for saving <paramref name="sceneObject"/>.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an sceneObject stream.
/// </param>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/>, <paramref name="sceneObject"/> or <paramref name="criteria"/> is null.
/// </exception>
public void Save(string path, SceneObject sceneObject, string format, SceneObjectCodecCriteria criteria)
{
using (FileStream fs = new FileStream(path, FileMode.CreateNew, FileAccess.Write)) {
Save(fs, sceneObject, format, criteria);
}
}
/// <summary>
/// Load media from stream.
/// </summary>
/// <param name="stream">
/// A <see cref="Stream"/> where the media data is stored.
/// </param>
/// <param name="criteria">
/// A <see cref="MediaCodecCriteria"/> that specify parameters for loading an media stream.
/// </param>
/// <returns>
/// An <see cref="SceneObject"/> holding the media data.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="stream"/> or <paramref name="criteria"/> is null.
/// </exception>
public SceneObject Load(string path, SceneObjectCodecCriteria criteria)
{
using (FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read)) {
return(Load(fs, criteria));
}
}
