public static byte[] UnpackNormals(byte[] data, VertexAttributeType attributeType, ref int stride)
{
switch (attributeType)
{
case VertexAttributeType.TangentSpaceUnitVectorsCompressed:
var packedElementSize = attributeType.GetSize();
stride = Vector3.SizeInBytes * 3;
var count = (data.Length / packedElementSize);
var bufferLength = count * stride;
var buffer = new byte[bufferLength];
using (var binaryReader = new BinaryReader(new MemoryStream(data)))
using (var binaryWriter = new BinaryWriter(new MemoryStream(buffer)))
{
while (binaryReader.BaseStream.Position < data.Length)
{
var normal = VertexFunctions.UnpackVectorInt(binaryReader.ReadInt32());
var tangent = VertexFunctions.UnpackVectorInt(binaryReader.ReadInt32());
var bitangent = VertexFunctions.UnpackVectorInt(binaryReader.ReadInt32());
binaryWriter.Write(normal);
binaryWriter.Write(tangent);
binaryWriter.Write(bitangent);
}
}
return(buffer);
default:
return(data);
}
}
private static VertexBuffer UnpackTextureCoordinateData(ref VertexBuffer vertexBuffer,
GlobalGeometryCompressionInfoBlock compressionInfo)
{
var packedElementSize = vertexBuffer.Type.GetSize( );
const int stride = 2 * sizeof(float);
var count = vertexBuffer.Data.Length / packedElementSize;
var bufferLength = count * stride;
var buffer = new byte[bufferLength];
using (var binaryReader = new BinaryReader(new MemoryStream(vertexBuffer.Data)))
using (var binaryWriter = new BinaryWriter(new MemoryStream(buffer)))
{
while (binaryReader.BaseStream.Position < vertexBuffer.Data.Length)
{
var s = VertexFunctions.Unpack(binaryReader.ReadInt16( ),
compressionInfo.TexcoordBoundsX.Min,
compressionInfo.TexcoordBoundsX.Max);
var t = VertexFunctions.Unpack(binaryReader.ReadInt16( ),
compressionInfo.TexcoordBoundsY.Min,
compressionInfo.TexcoordBoundsY.Max);
binaryWriter.Write(s);
binaryWriter.Write(t);
}
}
return(new VertexBuffer
{
Data = buffer,
Type = VertexAttributeType.UnpackedTextureCoordinateData
});
}
private static VertexBuffer UnpackLightingData(ref VertexBuffer vertexBuffer)
{
var packedElementSize = vertexBuffer.Type.GetSize( );
var stride = Vector3.SizeInBytes * 3;
var count = vertexBuffer.Data.Length / packedElementSize;
var bufferLength = count * stride;
var buffer = new byte[bufferLength];
using (var binaryReader = new BinaryReader(new MemoryStream(vertexBuffer.Data)))
using (var binaryWriter = new BinaryWriter(new MemoryStream(buffer)))
{
while (binaryReader.BaseStream.Position < vertexBuffer.Data.Length)
{
var normal = VertexFunctions.UnpackVectorInt(binaryReader.ReadInt32( ));
var tangent = VertexFunctions.UnpackVectorInt(binaryReader.ReadInt32( ));
var bitangent = VertexFunctions.UnpackVectorInt(binaryReader.ReadInt32( ));
binaryWriter.Write(normal);
binaryWriter.Write(tangent);
binaryWriter.Write(bitangent);
}
}
return(new VertexBuffer
{
Data = buffer,
Type = VertexAttributeType.UnpackedLightingData
});
}
private static byte[] UnpackCoordinates(byte[] data, VertexAttributeType attributeType,
GlobalGeometryCompressionInfoBlock compressionInfo, ref int stride)
{
switch (attributeType)
{
case VertexAttributeType.CoordinateCompressed:
case VertexAttributeType.CoordinateWithTripleNode:
case VertexAttributeType.CoordinateWithDoubleNode:
case VertexAttributeType.CoordinateWithSingleNode:
var packedElementSize = attributeType.GetSize();
stride = (3 * sizeof(float)) + (4 * sizeof(float)) + 4;
var count = (data.Length / packedElementSize);
var bufferLength = count * stride;
var buffer = new byte[bufferLength];
using (var binaryReader = new BinaryReader(new MemoryStream(data)))
using (var binaryWriter = new BinaryWriter(new MemoryStream(buffer)))
{
while (binaryReader.BaseStream.Position < data.Length)
{
var x = VertexFunctions.Unpack(binaryReader.ReadInt16(),
compressionInfo.PositionBoundsX.Min,
compressionInfo.PositionBoundsX.Max);
var y = VertexFunctions.Unpack(binaryReader.ReadInt16(),
compressionInfo.PositionBoundsY.Min,
compressionInfo.PositionBoundsY.Max);
var z = VertexFunctions.Unpack(binaryReader.ReadInt16(),
compressionInfo.PositionBoundsZ.Min,
compressionInfo.PositionBoundsZ.Max);
binaryWriter.Write(x);
binaryWriter.Write(y);
binaryWriter.Write(z);
switch (attributeType)
{
case VertexAttributeType.CoordinateCompressed:
WriteVertexNodeInformation(binaryWriter,
0,
0,
0,
1.0f,
0,
0);
break;
case VertexAttributeType.CoordinateWithSingleNode:
WriteVertexNodeInformation(binaryWriter,
binaryReader.ReadByte(),
binaryReader.ReadByte(),
0,
1.0f,
0,
0);
break;
case VertexAttributeType.CoordinateWithDoubleNode:
binaryReader.ReadBytes(2);
WriteVertexNodeInformation(binaryWriter,
binaryReader.ReadByte(),
binaryReader.ReadByte(),
0,
binaryReader.ReadByte() / 255.0f,
binaryReader.ReadByte() / 255.0f,
0);
break;
case VertexAttributeType.CoordinateWithTripleNode:
WriteVertexNodeInformation(binaryWriter,
binaryReader.ReadByte(),
binaryReader.ReadByte(),
binaryReader.ReadByte(),
binaryReader.ReadByte() / 255.0f,
binaryReader.ReadByte() / 255.0f,
binaryReader.ReadByte() / 255.0f);
break;
}
}
}
return(buffer);
default:
return(data);
}
}
private static VertexBuffer UnpackWorldCoordinateData(ref VertexBuffer vertexBuffer,
GlobalGeometryCompressionInfoBlock compressionInfo)
{
var packedElementSize = vertexBuffer.Type.GetSize( );
const int stride = 3 * sizeof(float) + 4 * sizeof(float) + 4;
var count = vertexBuffer.Data.Length / packedElementSize;
var bufferLength = count * stride;
var buffer = new byte[bufferLength];
using (var binaryReader = new BinaryReader(new MemoryStream(vertexBuffer.Data)))
using (var binaryWriter = new BinaryWriter(new MemoryStream(buffer)))
{
while (binaryReader.BaseStream.Position < vertexBuffer.Data.Length)
{
switch (vertexBuffer.Type)
{
case VertexAttributeType.CoordinateFloat:
{
var x = binaryReader.ReadSingle( );
var y = binaryReader.ReadSingle( );
var z = binaryReader.ReadSingle( );
binaryWriter.Write(x);
binaryWriter.Write(y);
binaryWriter.Write(z);
WriteVertexNodeInformation(binaryWriter,
0,
0,
0,
1.0f,
0,
0);
}
break;
default:
{
var x = VertexFunctions.Unpack(binaryReader.ReadInt16( ),
compressionInfo.PositionBoundsX.Min,
compressionInfo.PositionBoundsX.Max);
var y = VertexFunctions.Unpack(binaryReader.ReadInt16( ),
compressionInfo.PositionBoundsY.Min,
compressionInfo.PositionBoundsY.Max);
var z = VertexFunctions.Unpack(binaryReader.ReadInt16( ),
compressionInfo.PositionBoundsZ.Min,
compressionInfo.PositionBoundsZ.Max);
binaryWriter.Write(x);
binaryWriter.Write(y);
binaryWriter.Write(z);
switch (vertexBuffer.Type)
{
case VertexAttributeType.CoordinateFloat:
case VertexAttributeType.CoordinateCompressed:
WriteVertexNodeInformation(binaryWriter,
0,
0,
0,
1.0f,
0,
0);
break;
case VertexAttributeType.CoordinateWithSingleNode:
WriteVertexNodeInformation(binaryWriter,
binaryReader.ReadByte( ),
binaryReader.ReadByte( ),
0,
1.0f,
0,
0);
break;
case VertexAttributeType.CoordinateWithDoubleNode:
binaryReader.ReadBytes(2);
WriteVertexNodeInformation(binaryWriter,
binaryReader.ReadByte( ),
binaryReader.ReadByte( ),
0,
binaryReader.ReadByte( ) / 255.0f,
binaryReader.ReadByte( ) / 255.0f,
0);
break;
case VertexAttributeType.CoordinateWithTripleNode:
WriteVertexNodeInformation(binaryWriter,
binaryReader.ReadByte( ),
binaryReader.ReadByte( ),
binaryReader.ReadByte( ),
binaryReader.ReadByte( ) / 255.0f,
binaryReader.ReadByte( ) / 255.0f,
binaryReader.ReadByte( ) / 255.0f);
break;
}
}
break;
}
}
return(new VertexBuffer
{
Data = buffer,
Type = VertexAttributeType.UnpackedWorldCoordinateData
});
}
}
