/**
 * 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 movingPartBase.I
 * @author drose
 * @date 1999-02-22
 */

/**
 * Normally, you'd use make_copy() or copy_subgraph() to make a copy of this.
 */
INLINE MovingPartBase::
MovingPartBase(const MovingPartBase &copy) :
  PartGroup(copy),
  _num_effective_channels(0),
  _effective_control(nullptr),
  _forced_channel(copy._forced_channel)
{
  // We don't copy the bound channels.  We do copy the forced_channel, though
  // this is just a pointerwise copy.
}

/**
 * Returns the number of channels that might be bound to this PartGroup.  This
 * might not be the actual number of channels, since there might be holes in
 * the list; it is one more than the index number of the highest bound
 * channel.  Thus, it is called get_max_bound() instead of get_num_bound().
 */
INLINE int MovingPartBase::
get_max_bound() const {
  return _channels.size();
}

/**
 * Returns the nth bound channel on this PartGroup.  n can be determined by
 * iterating from 0 to one less than get_max_bound(); or n might be
 * AnimControl::get_channel_index().
 *
 * This will return NULL if there is no channel bound on the indicated index.
 * It is an error to call this if n is less than zero or greater than or equal
 * to get_max_bound().
 */
INLINE AnimChannelBase *MovingPartBase::
get_bound(int n) const {
  nassertr(n >= 0 && n < (int)_channels.size(), nullptr);
  return _channels[n];
}