/// <summary>
/// Writes mesh data to the .obj.
/// </summary>
/// <param name="reader">The mesh reader to use.</param>
/// <param name="compressor">The vertex compressor to use.</param>
/// <param name="resourceStream">A stream open on the resource data.</param>
public void ExtractMesh(MeshReader reader, VertexCompressor compressor, Stream resourceStream)
{
// Read the vertex buffer and decompress each vertex
var vertices = ReadVertices(reader, resourceStream);
DecompressVertices(vertices, compressor);
// Write out the vertices
WriteVertices(vertices);
// Read and write out the triangles for each part
foreach (var part in reader.Mesh.Parts)
{
var indexes = ReadIndexes(reader, part, resourceStream);
WriteTriangles(indexes);
}
_baseIndex += (uint)vertices.Count;
}
/// <summary>
/// Reads the index buffer data and converts it into a triangle list if necessary.
/// </summary>
/// <param name="reader">The mesh reader to use.</param>
/// <param name="part">The mesh part to read.</param>
/// <param name="resourceStream">A stream open on the resource data.</param>
/// <returns>The index buffer converted into a triangle list.</returns>
private static uint[] ReadIndexes(MeshReader reader, Mesh.Part part, Stream resourceStream)
{
// Use index buffer 0
var indexBuffer = reader.IndexBuffers[0];
if (indexBuffer == null)
throw new InvalidOperationException("Index buffer 0 is null");
// Read the indexes
var indexStream = reader.OpenIndexBufferStream(indexBuffer, resourceStream);
indexStream.Position = part.FirstIndex;
switch (indexBuffer.Type)
{
case PrimitiveType.TriangleList:
return indexStream.ReadIndexes(part.IndexCount);
case PrimitiveType.TriangleStrip:
return indexStream.ReadTriangleStrip(part.IndexCount);
default:
throw new InvalidOperationException("Unsupported index buffer type: " + indexBuffer.Type);
}
}
/// <summary>
/// Reads the vertex data for a mesh into a format-independent list.
/// </summary>
/// <param name="reader">The mesh reader to use.</param>
/// <param name="resourceStream">A stream open on the resource data.</param>
/// <returns>The list of vertices that were read.</returns>
private static List<ObjVertex> ReadVertices(MeshReader reader, Stream resourceStream)
{
// Open a vertex reader on stream 0 (main vertex data)
var mainBuffer = reader.VertexStreams[0];
if (mainBuffer == null)
throw new InvalidOperationException("Mesh does not have a vertex buffer bound to stream 0");
var vertexReader = reader.OpenVertexStream(mainBuffer, resourceStream);
switch (reader.Mesh.Type)
{
case VertexType.Rigid:
return ReadRigidVertices(vertexReader, mainBuffer.Count);
case VertexType.Skinned:
return ReadSkinnedVertices(vertexReader, mainBuffer.Count);
case VertexType.DualQuat:
return ReadDualQuatVertices(vertexReader, mainBuffer.Count);
default:
throw new InvalidOperationException("Only Rigid, Skinned, and DualQuat meshes are supported");
}
}
public override bool Execute(List<string> args)
{
if (args.Count != 3)
return false;
var variantName = args[0];
var fileType = args[1];
var fileName = args[2];
if (fileType != "obj")
return false;
// Find the variant to extract
if (_model.RenderModel == null)
{
Console.Error.WriteLine("The model does not have a render model associated with it.");
return true;
}
var variant = _model.Variants.FirstOrDefault(v => (_stringIds.GetString(v.Name) ?? v.Name.ToString()) == variantName);
if (variant == null && _model.Variants.Count > 0)
{
Console.Error.WriteLine("Unable to find variant \"{0}\"", variantName);
Console.Error.WriteLine("Use \"listvariants\" to list available variants.");
return true;
}
// Load resource caches
Console.WriteLine("Loading resource caches...");
var resourceManager = new ResourceDataManager();
try
{
resourceManager.LoadCachesFromDirectory(_fileInfo.DirectoryName);
}
catch
{
Console.WriteLine("Unable to load the resource .dat files.");
Console.WriteLine("Make sure that they all exist and are valid.");
return true;
}
// Deserialize the render model tag
Console.WriteLine("Reading model data...");
RenderModel renderModel;
using (var cacheStream = _fileInfo.OpenRead())
{
var renderModelContext = new TagSerializationContext(cacheStream, _cache, _model.RenderModel);
renderModel = TagDeserializer.Deserialize<RenderModel>(renderModelContext);
}
if (renderModel.Resource == null)
{
Console.Error.WriteLine("Render model does not have a resource associated with it");
return true;
}
// Deserialize the resource definition
var resourceContext = new ResourceSerializationContext(renderModel.Resource);
var definition = TagDeserializer.Deserialize<RenderGeometryResourceDefinition>(resourceContext);
using (var resourceStream = new MemoryStream())
{
// Extract the resource data
resourceManager.Extract(renderModel.Resource, resourceStream);
using (var objFile = new StreamWriter(File.Open(fileName, FileMode.Create, FileAccess.Write)))
{
var objExtractor = new ObjExtractor(objFile);
var vertexCompressor = new VertexCompressor(renderModel.Compression[0]); // Create a (de)compressor from the first compression block
if (variant != null)
{
// Extract each region in the variant
foreach (var region in variant.Regions)
{
// Get the corresonding region in the render model tag
if (region.RenderModelRegionIndex >= renderModel.Regions.Count)
continue;
var renderModelRegion = renderModel.Regions[region.RenderModelRegionIndex];
// Get the corresponding permutation in the render model tag
// (Just extract the first permutation for now)
if (region.Permutations.Count == 0)
continue;
var permutation = region.Permutations[0];
if (permutation.RenderModelPermutationIndex >= renderModelRegion.Permutations.Count)
continue;
var renderModelPermutation = renderModelRegion.Permutations[permutation.RenderModelPermutationIndex];
// Extract each mesh in the permutation
var meshIndex = renderModelPermutation.MeshIndex;
var meshCount = renderModelPermutation.MeshCount;
var regionName = _stringIds.GetString(region.Name) ?? region.Name.ToString();
var permutationName = _stringIds.GetString(permutation.Name) ?? permutation.Name.ToString();
Console.WriteLine("Extracting {0} mesh(es) for {1}:{2}...", meshCount, regionName, permutationName);
for (var i = 0; i < meshCount; i++)
{
// Create a MeshReader for the mesh and pass it to the obj extractor
var meshReader = new MeshReader(renderModel.Meshes[meshIndex + i], definition);
objExtractor.ExtractMesh(meshReader, vertexCompressor, resourceStream);
}
}
}
else
{
// No variant - just extract every mesh
Console.WriteLine("Extracting {0} mesh(es)...", renderModel.Meshes.Count);
foreach (var mesh in renderModel.Meshes)
{
// Create a MeshReader for the mesh and pass it to the obj extractor
var meshReader = new MeshReader(mesh, definition);
objExtractor.ExtractMesh(meshReader, vertexCompressor, resourceStream);
}
}
objExtractor.Finish();
}
}
Console.WriteLine("Done!");
return true;
}
