animChannelBase.cxx

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/**
 * 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 animChannelBase.cxx
 * @author drose
 * @date 1999-02-19
 */

#include "animChannelBase.h"
#include "datagram.h"
#include "datagramIterator.h"
#include "bamReader.h"
#include "bamWriter.h"

TypeHandle AnimChannelBase::_type_handle;


/**
 * Returns true if the value has changed since the last call to has_changed().
 * last_frame is the frame number of the last call; this_frame is the current
 * frame number.  last_frac and this_frac are the fractional steps into those
 * frames, which will be 0.0 unless we are running in frame_blend mode.
 */
bool AnimChannelBase::
has_changed(int, double, int, double) {
  return true;
}

/**
 * Function to write the important information in the particular object to a
 * Datagram
 */
void AnimChannelBase::
write_datagram(BamWriter *manager, Datagram &me) {
  AnimGroup::write_datagram(manager, me);
  me.add_uint16(_last_frame);
}

/**
 * Function that reads out of the datagram (or asks manager to read) all of
 * the data that is needed to re-create this object and stores it in the
 * appropiate place
 */
void AnimChannelBase::
fillin(DatagramIterator &scan, BamReader *manager) {
  AnimGroup::fillin(scan, manager);
  _last_frame = scan.get_uint16();
}