void InitializeBspTags(IO.EndianReader s, Blam.CacheFile cache)
{
// Seek to the scenario's scenario_structure_bsps_block tag_block field
s.Seek(items[0].Offset + 1444, System.IO.SeekOrigin.Begin);
bspTags = new Item[s.ReadInt32()];
uint sbsp_offset = s.ReadPointer();
// Seek to the scenario_structure_bsps_block definitions
s.Seek(sbsp_offset, System.IO.SeekOrigin.Begin);
DatumIndex di = new DatumIndex();
CacheItemBase item = null;
// Process each definition's runtime data
for (int x = 0; x < bspTags.Length; x++)
{
s.Seek(28, System.IO.SeekOrigin.Current);
di.Read(s);
item = items[di.Index];
bspTags[x] = item as CacheItemBase;
// Seek back to the beginning of the definition so the following stream code works
s.Seek(-Halo1.Tags.scenario_structure_bsps_block.kSizeOf, System.IO.SeekOrigin.Current);
// We're actually selectively reading scenario_structure_bsps_block fields here
// The offset actually points to the bsp header, and the bsp comes after that header
item.Offset = s.ReadInt32() + Halo1.Tags.scenario_structure_bsps_header.kSizeOf;
item.Size = s.ReadInt32();
cache.BspAddressMasks.Add(s.ReadUInt32() - (uint)item.Offset); // won't count the header
item.BspIndex = bspCount++;
// Seek to the end of this definition, and thus, the start of the next definition
s.Seek(20, System.IO.SeekOrigin.Current);
}
}
/// <summary>
/// Process the reference data from a tag stream
/// </summary>
/// <param name="ts"></param>
/// <exception cref="Exceptions.InvalidTagBlock"></exception>
public override void ReadHeader(IO.ITagStream ts)
{
IO.EndianReader s = ts.GetInputStream();
headerOffset = s.PositionUnsigned; // nifty for debugging
try
{
Resize(s.ReadInt32()); // element count
relativeOffset = s.ReadPointer(); // elements
s.ReadInt32(); // definition
}
catch (Exception ex)
{
throw new Exceptions.InvalidTagBlock(ex,
base.headerOffset, uint.MaxValue,
this.owner, ts);
}
}
