seek.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 seek.cxx
 * @author Deepak, John, Navin
 * @date 2009-10-24
 */

#include "seek.h"

Seek::Seek(AICharacter *ai_ch, NodePath target_object, float seek_wt) {
  _ai_char = ai_ch;

  _seek_position = target_object.get_pos(_ai_char->_window_render);
  _seek_weight = seek_wt;

  _seek_direction = _seek_position - _ai_char->_ai_char_np.get_pos(_ai_char->_window_render);
  _seek_direction.normalize();

  _seek_done = false;
}

Seek::Seek(AICharacter *ai_ch, LVecBase3 pos, float seek_wt) {
      _ai_char = ai_ch;

  _seek_position = pos;
  _seek_weight = seek_wt;

  _seek_direction = _seek_position - _ai_char->_ai_char_np.get_pos(_ai_char->_window_render);
  _seek_direction.normalize();

  _seek_done = false;
}

Seek::~Seek() {
}

/**
 * This function performs the seek and returns a seek force which is used in
 * the calculate_prioritized function.  This function is not to be used by the
 * user.
 */
LVecBase3 Seek::do_seek() {
  double target_distance = (_seek_position - _ai_char->_ai_char_np.get_pos(_ai_char->_window_render)).length();

    if(int(target_distance) == 0) {
        _seek_done = true;
    _ai_char->_steering->_steering_force = LVecBase3(0.0, 0.0, 0.0);
    _ai_char->_steering->turn_off("seek");
    return(LVecBase3(0.0, 0.0, 0.0));
  }

  LVecBase3 desired_force = _seek_direction * _ai_char->_movt_force;
  return(desired_force);
}