/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file lwoLayer.cxx
 * @author drose
 * @date 2001-04-24
 */

#include "lwoLayer.h"
#include "lwoInputFile.h"

#include "dcast.h"
#include "indent.h"

TypeHandle LwoLayer::_type_handle;

/**
 * Resets the layer's parameters to initial defaults for a generic layer
 * created implicitly.
 */
void LwoLayer::
make_generic() {
  _number = -1;
  _flags = 0;
  _pivot.set(0.0, 0.0, 0.0);
  _name = "Generic";
  _parent = -1;
}

/**
 * Reads the data of the chunk in from the given input file, if possible.  The
 * ID and length of the chunk have already been read.  stop_at is the byte
 * position of the file to stop at (based on the current position at
 * in->get_bytes_read()).  Returns true on success, false otherwise.
 */
bool LwoLayer::
read_iff(IffInputFile *in, size_t stop_at) {
  LwoInputFile *lin = DCAST(LwoInputFile, in);

  _number = lin->get_be_uint16();
  _flags = lin->get_be_uint16();
  _pivot = lin->get_vec3();
  _name = lin->get_string();

  if (lin->get_bytes_read() >= stop_at) {
    _parent = -1;
  } else {
    _parent = lin->get_be_uint16();
    if (_parent == 0xffff) {
      _parent = -1;
    }
  }

  return true;
}

/**
 *
 */
void LwoLayer::
write(std::ostream &out, int indent_level) const {
  indent(out, indent_level)
    << get_id() << " { number = " << _number << ", flags = 0x"
    << std::hex << _flags << std::dec << ", pivot = " << _pivot
    << ", _name = \"" << _name << "\", _parent = " << _parent << " }\n";
}