Function CheckRearView

Descent3/object.cpp:2246–2276

Deal with the player's rear view

// Deal with the player's rear view
void CheckRearView(int down_count, bool down_state) {
  player *player = &Players[Player_num];

#define LEAVE_TIME (1.0 / 16) // How long until we decide key is down

  static bool leave_mode;
  static float entry_time;

  if (down_count) { // key/button has gone down

    if (player->flags & PLAYER_FLAGS_REARVIEW) { // rear view was active, so turn it off
      player->flags &= ~PLAYER_FLAGS_REARVIEW;
    } else { // rear view wasn't active, so turn it on
      player->flags |= PLAYER_FLAGS_REARVIEW;
      leave_mode = 0; // means wait for another key
      entry_time = Gametime;
    }
  } else { // key didn't go down this frame; check if it used to be down

    if (down_state) { // key is still down

      if (!leave_mode && ((Gametime - entry_time) > LEAVE_TIME))
        leave_mode = 1;
    } else {

      if (leave_mode && (player->flags & PLAYER_FLAGS_REARVIEW)) {
        player->flags &= ~PLAYER_FLAGS_REARVIEW;
      }
    }
  }
}

extern int Timedemo_frame;
float Timedemo_timecount;