// LWOB
static IEnumerable<Polygon> ReadPolygons5(ChunkReader reader, uint vertex_offset)
{
// fill in the new polygons
while (reader.BytesLeft > 0)
{
var vertex_count = reader.ReadUInt16();
var newPolygon = new Polygon(PolygonType.ID_FACE);
for (var j = 0; j < vertex_count; j++)
newPolygon.Vertices.Add(
new PolygonVertex(reader.ReadUInt16() + vertex_offset)
);
var index = (int)reader.ReadSInt16();
if (index < 0)
{
index = (int)-index;
reader.ReadSInt16(); // skip 2 bytes - Q: why??
}
newPolygon.surf_index = (uint)(index - 1);
yield return newPolygon;
}
}