cLerpAnimEffectInterval.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 cLerpAnimEffectInterval.cxx
 * @author drose
 * @date 2002-08-27
 */

#include "cLerpAnimEffectInterval.h"
#include "lerp_helpers.h"
#include "partBundle.h"

TypeHandle CLerpAnimEffectInterval::_type_handle;

/**
 * Advances the time on the interval.  The time may either increase (the
 * normal case) or decrease (e.g.  if the interval is being played by a
 * slider).
 */
void CLerpAnimEffectInterval::
priv_step(double t) {
  check_started(get_class_type(), "priv_step");
  _state = S_started;
  double d = compute_delta(t);

  Controls::iterator ci;
  for (ci = _controls.begin(); ci != _controls.end(); ++ci) {
    ControlDef &def = (*ci);
    float effect;
    lerp_value(effect, d, def._begin_effect, def._end_effect);
    def._control->get_part()->set_control_effect(def._control, effect);
  }

  _curr_t = t;
}

/**
 *
 */
void CLerpAnimEffectInterval::
output(std::ostream &out) const {
  out << get_name() << ": ";

  if (_controls.empty()) {
    out << "(no controls)";
  } else {
    Controls::const_iterator ci;
    ci = _controls.begin();
    out << (*ci)._name;
    ++ci;
    while (ci != _controls.end()) {
      out << ", " << (*ci)._name;
      ++ci;
    }
  }

  out << " dur " << get_duration();
}