public static IEnumerable <GeometryMesh> GetMeshes(Module module, ModuleItem item, IList <SectionBlock> sections, int lod, Func <SectionBlock, short?> boundsIndex, Func <int, int, int> mapNode = null)
{
VertexBufferInfo[] vertexBufferInfo;
IndexBufferInfo[] indexBufferInfo;
var resourceIndex = module.Resources[item.ResourceIndex];
var resource = module.Items[resourceIndex]; //this will be the [mesh resource!*] tag
if (resource.ResourceCount > 0)
{
System.Diagnostics.Debugger.Break();
}
using (var blockReader = resource.CreateReader())
{
var header = new MetadataHeader(blockReader);
using (var reader = blockReader.CreateVirtualReader(header.GetSectionOffset(1)))
{
//DataBlock 0: ?
//DataBlock 1: vertex buffer infos
//DataBlock 2: index buffer infos
//DataBlock 3+: additional vertex data block for each buffer
//DataBlock n+: additional index data block for each buffer
var bufferCount = (header.DataBlocks.Count - 3) / 2;
var block = header.DataBlocks[1];
reader.Seek(block.Offset, SeekOrigin.Begin);
vertexBufferInfo = reader.ReadEnumerable <VertexBufferInfo>(bufferCount).ToArray();
block = header.DataBlocks[2];
reader.Seek(block.Offset, SeekOrigin.Begin);
indexBufferInfo = reader.ReadEnumerable <IndexBufferInfo>(bufferCount).ToArray();
}
using (var reader = blockReader.CreateVirtualReader(header.GetSectionOffset(2)))
{
var doc = new XmlDocument();
doc.LoadXml(Resources.Halo5VertexBuffer);
var lookup = doc.DocumentElement.ChildNodes.Cast <XmlNode>()
.ToDictionary(n => Convert.ToInt32(n.Attributes[XmlVertexField.Type].Value, 16));
var sectionIndex = -1;
foreach (var section in sections)
{
sectionIndex++;
var lodData = section.SectionLods[Math.Min(lod, section.SectionLods.Count - 1)];
if (lodData.VertexBufferIndex < 0 || lodData.IndexBufferIndex < 0 || !lookup.ContainsKey(section.VertexFormat))
{
yield return(new GeometryMesh());
continue;
}
var node = lookup[section.VertexFormat];
var vInfo = vertexBufferInfo[lodData.VertexBufferIndex];
var iInfo = indexBufferInfo[lodData.IndexBufferIndex];
var mesh = new GeometryMesh
{
IndexFormat = section.IndexFormat,
Vertices = new IVertex[vInfo.VertexCount],
VertexWeights = VertexWeights.None,
NodeIndex = section.NodeIndex == byte.MaxValue ? (byte?)null : section.NodeIndex,
BoundsIndex = 0
};
try
{
mesh.Submeshes.AddRange(
lodData.Submeshes.Select(s => new GeometrySubmesh
{
MaterialIndex = s.ShaderIndex,
IndexStart = s.IndexStart,
IndexLength = s.IndexLength
})
);
var block = header.DataBlocks[3 + lodData.VertexBufferIndex];
reader.Seek(block.Offset, SeekOrigin.Begin);
for (int i = 0; i < vInfo.VertexCount; i++)
{
var vert = new XmlVertex(reader, node);
mesh.Vertices[i] = vert;
}
block = header.DataBlocks[3 + vertexBufferInfo.Length + lodData.IndexBufferIndex];
reader.Seek(block.Offset, SeekOrigin.Begin);
if (vInfo.VertexCount > ushort.MaxValue)
{
mesh.Indicies = reader.ReadEnumerable <int>(iInfo.IndexCount).ToArray();
}
else
{
mesh.Indicies = reader.ReadEnumerable <ushort>(iInfo.IndexCount).Select(i => (int)i).ToArray();
}
}
catch
{
System.Diagnostics.Debugger.Break();
}
yield return(mesh);
}
}
}
}