protected void WriteMeshBounds( BinaryWriter writer )
{
long start_offset = writer.Seek( 0, SeekOrigin.Current );
WriteChunk( writer, MeshChunkID.MeshBounds, 0 );
WriteVector3( writer, mesh.BoundingBox.Minimum );
WriteVector3( writer, mesh.BoundingBox.Maximum );
WriteFloat( writer, mesh.BoundingSphereRadius );
// Save chunk size back into Header
long end_offset = writer.Seek( 0, SeekOrigin.Current );
writer.Seek( (int)start_offset, SeekOrigin.Begin );
WriteChunk( writer, MeshChunkID.MeshBounds, (int)( end_offset - start_offset ) );
writer.Seek( (int)end_offset, SeekOrigin.Begin );
}