private static void ReadHeader(ref BinaryReader rb, out DXMHeader header)
{
header.nameCharacter0 = rb.ReadByte();
header.nameCharacter1 = rb.ReadByte();
header.nameCharacter2 = rb.ReadByte();
header.nameCharacter3 = rb.ReadByte();
header.majorVersion = rb.ReadByte();
header.minorVersion = rb.ReadByte();
header.encoding = rb.ReadByte();
header.compression = rb.ReadByte();
header.vertexCount = rb.ReadUInt64();
header.vertexCompositionFlags = rb.ReadUInt32();
header.groupCount = rb.ReadUInt16();
header.indexFormat = rb.ReadByte();
header.indexByteCount = rb.ReadByte();
header.vertexTableAddr = rb.ReadUInt64();
header.indexTableAddr = rb.ReadUInt64();
}
/// <summary>
/// Checks if the file headers matches this DXM loader pattern.
/// </summary>
/// <param name="header">The header to checks.</param>
/// <param name="flagMesh">A reference to the mesh vertex composition flag.</param>
/// <param name="flagPC">A reference to the point cloud vertex composition flag.</param>
private static void ValidateHeader(DXMHeader header, ref int flagMesh, ref int flagPC)
{
flagMesh |= (int)DXMVertexFlag.Vertex_3_F32;
flagMesh |= (int)DXMVertexFlag.Normal_3_F32;
flagMesh |= (int)DXMVertexFlag.Texcoord_2_F32;
flagPC |= (int)DXMVertexFlag.Vertex_3_F32;
flagPC |= (int)DXMVertexFlag.Color_4_U8;
string ident = "" +
Convert.ToChar(header.nameCharacter0) +
Convert.ToChar(header.nameCharacter1) +
Convert.ToChar(header.nameCharacter2) +
Convert.ToChar(header.nameCharacter3);
if (ident != "DXM1")
{
throw new Exception("Invalid file format of type: " + ident);
}
if ((header.majorVersion * 256 + header.minorVersion) < (2 * 256 + 2))
{
throw new Exception("Outdated loader.");
}
if (header.encoding != (int)DXMEncoding.DeInterleaved)
{
throw new Exception("Unsupported encoding.");
}
if (header.compression != (int)DXMCompression.NoCompression)
{
throw new Exception("Unsupported compression.");
}
if (header.vertexCompositionFlags != flagMesh && header.vertexCompositionFlags != flagPC)
{
throw new Exception("Unsupported vertex format.");
}
}