lwoPolygonTags.cxx

Go to the documentation of this file.

/**
 * 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 lwoPolygonTags.cxx
 * @author drose
 * @date 2001-04-24
 */

#include "lwoPolygonTags.h"
#include "lwoInputFile.h"

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

TypeHandle LwoPolygonTags::_type_handle;


/**
 * Returns true if the map has a tag associated with the given polygon index,
 * false otherwise.
 */
bool LwoPolygonTags::
has_tag(int polygon_index) const {
  return (_tmap.count(polygon_index) != 0);
}

/**
 * Returns the tag associated with the given polygon index, or -1 if there is
 * no tag associated.
 */
int LwoPolygonTags::
get_tag(int polygon_index) const {
  TMap::const_iterator ti;
  ti = _tmap.find(polygon_index);
  if (ti != _tmap.end()) {
    return (*ti).second;
  }

  return -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 LwoPolygonTags::
read_iff(IffInputFile *in, size_t stop_at) {
  LwoInputFile *lin = DCAST(LwoInputFile, in);

  _tag_type = lin->get_id();

  while (lin->get_bytes_read() < stop_at && !lin->is_eof()) {
    int polygon_index = lin->get_vx();
    int tag = lin->get_be_int16();

    bool inserted = _tmap.insert(TMap::value_type(polygon_index, tag)).second;
    if (!inserted) {
      nout << "Duplicate index " << polygon_index << " in map.\n";
    }
  }

  return (lin->get_bytes_read() == stop_at);
}

/**
 *
 */
void LwoPolygonTags::
write(std::ostream &out, int indent_level) const {
  indent(out, indent_level)
    << get_id() << " { tag_type = " << _tag_type << ", "
    << _tmap.size() << " values }\n";
}