Function AIDoTrackFrame

Descent3/AImain.cpp:4279–4364

}

void AIDoTrackFrame(object *obj) {
  ai_frame *ai_info = obj->ai_info;
  float track_distance;

  AI_FriendNumNear = 0;
  AI_EnemyNumNear = 0;

  if (ai_info->ai_type == AIT_BIRD_FLOCK1 ||
      ai_info->flags & (AIF_TRACK_CLOSEST_2_FRIENDS | AIF_TRACK_CLOSEST_2_ENEMIES)) {

    if (ai_info->ai_type == AIT_BIRD_FLOCK1)
      track_distance = 100.0f;
    else
      track_distance = GoalDetermineTrackDist(obj);

    if (track_distance > 0.0f) {
      int16_t near_objs[10];
      int num_near = fvi_QuickDistObjectList(&obj->pos, obj->roomnum, ai_info->avoid_friends_distance + track_distance,
                                             near_objs, 10, false, true, false, true);
      float dist;
      vector to;

      AI_EnemyDist[0] = AI_EnemyDist[1] = 9999999.0f;
      AI_FriendDist[0] = AI_FriendDist[1] = 9999999.0f;

      for (int xxx = 0; xxx < num_near; xxx++) {
        object *g_obj = &Objects[near_objs[xxx]];

        if (g_obj->type == OBJ_POWERUP || (obj == g_obj) || ObjectsAreRelated(OBJNUM(obj), near_objs[xxx]))
          continue;

        int *cur_num_near;
        object **cur_obj;
        float *cur_dist;
        vector *cur_dir;

        if ((ai_info->flags & AIF_TRACK_CLOSEST_2_ENEMIES) && AIObjEnemy(obj, g_obj)) {
          cur_num_near = &AI_EnemyNumNear;
          cur_obj = AI_EnemyObj;
          cur_dist = AI_EnemyDist;
          cur_dir = AI_EnemyDir;
        } else if ((ai_info->flags & AIF_TRACK_CLOSEST_2_FRIENDS) && AIObjFriend(obj, g_obj)) {
          cur_num_near = &AI_FriendNumNear;
          cur_obj = AI_FriendObj;
          cur_dist = AI_FriendDist;
          cur_dir = AI_FriendDir;
        } else
          continue;

        to = g_obj->pos - obj->pos;
        dist = vm_NormalizeVector(&to);

        dist -= (obj->size + g_obj->size);
        if (dist < 0.0f)
          dist = 0.0f;

        vector fov_vec;
        AIDetermineFovVec(obj, &fov_vec);