spacerace.c

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/***********************************************************************
 Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
***********************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
#include <string.h>
 
/* utility */
#include "fcintl.h"
#include "log.h"
#include "shared.h"
 
/* common */
#include "calendar.h"
#include "events.h"
#include "game.h"
#include "nation.h"
#include "packets.h"
#include "spaceship.h"
 
/* server */
#include "plrhand.h"
#include "notify.h"
#include "srv_main.h"
 
#include "spacerace.h"
 
/**********************************************************************/
void spaceship_calc_derived(struct player_spaceship *ship)
{
  int i;
  /* these are how many are connected: */
  int fuel = 0;
  int propulsion = 0;
  int habitation = 0;
  int life_support = 0;
  int solar_panels = 0;
 
  fc_assert_ret(ship->structurals <= NUM_SS_STRUCTURALS);
  fc_assert_ret(ship->components <= NUM_SS_COMPONENTS);
  fc_assert_ret(ship->modules <= NUM_SS_MODULES);
  
  ship->mass = 0;
  ship->support_rate = ship->energy_rate =
    ship->success_rate = ship->travel_time = 0.0;
 
  for (i = 0; i < NUM_SS_STRUCTURALS; i++) {
    if (BV_ISSET(ship->structure, i)) {
      ship->mass += (i < 6) ? 200 : 100;
      /* s0 to s3 are heavier; actually in Civ1 its a bit stranger
         than this, but not worth figuring out --dwp */
    }
  }
  for (i = 0; i < ship->fuel; i++) {
    if (BV_ISSET(ship->structure, components_info[i * 2].required)) {
      fuel++;
    }
  }
  for (i = 0; i < ship->propulsion; i++) {
    if (BV_ISSET(ship->structure, components_info[i * 2 + 1].required)) {
      propulsion++;
    }
  }
  for (i = 0; i < ship->habitation; i++) {
    if (BV_ISSET(ship->structure, modules_info[i * 3].required)) {
      habitation++;
    }
  }
  for (i = 0; i < ship->life_support; i++) {
    if (BV_ISSET(ship->structure, modules_info[i * 3 + 1].required)) {
      life_support++;
    }
  }
  for (i = 0; i < ship->solar_panels; i++) {
    if (BV_ISSET(ship->structure, modules_info[i * 3 + 2].required)) {
      solar_panels++;
    }
  }
 
  ship->mass += 1600 * (habitation + life_support)
    + 400 * (solar_panels + propulsion + fuel);
 
  ship->population = habitation * 10000;
 
  if (habitation > 0) {
    ship->support_rate = life_support / (double) habitation;
  }
  if (life_support + habitation > 0) {
    ship->energy_rate = 2.0 * solar_panels / (double)(life_support+habitation);
  }
  if (fuel>0 && propulsion>0) {
    ship->success_rate =
        MIN(ship->support_rate, 1.0) * MIN(ship->energy_rate, 1.0);
  }
 
  /* The Success% can be less by up to a few % in some cases
     (I think if P != F or if P and/or F too small (eg <= 2?) ?)
     but probably not worth worrying about.
     Actually, the Civ1 manual suggests travel time is relevant. --dwp
  */
 
  ship->travel_time = ship->mass * game.server.spaceship_travel_pct
    / 100 / (200.0 * MIN(propulsion,fuel) + 20.0);
 
}
 
/**********************************************************************/
void send_spaceship_info(struct player *src, struct conn_list *dest)
{
  if (!dest) {
    dest = game.est_connections;
  }
 
  players_iterate(pplayer) {
    if (!src || pplayer == src) {
      struct packet_spaceship_info info;
      struct player_spaceship *ship = &pplayer->spaceship;
          
      info.player_num = player_number(pplayer);
      info.sship_state = ship->state;
      info.structurals = ship->structurals;
      info.components = ship->components;
      info.modules = ship->modules;
      info.fuel = ship->fuel;
      info.propulsion = ship->propulsion;
      info.habitation = ship->habitation;
      info.life_support = ship->life_support;
      info.solar_panels = ship->solar_panels;
      info.launch_year = ship->launch_year;
      info.population = ship->population;
      info.mass = ship->mass;
      info.support_rate = ship->support_rate;
      info.energy_rate = ship->energy_rate;
      info.success_rate = ship->success_rate;
      info.travel_time = ship->travel_time;
      info.structure = ship->structure;
          
      lsend_packet_spaceship_info(dest, &info);
    }
  } players_iterate_end;
}
 
/**********************************************************************/
void handle_spaceship_launch(struct player *pplayer)
{
  struct player_spaceship *ship = &pplayer->spaceship;
  int arrival;
 
  if (!player_primary_capital(pplayer)) {
    notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                  _("You need to have a capital in order to launch "
                    "your spaceship."));
    return;
  }
  if (ship->state >= SSHIP_LAUNCHED) {
    notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                  _("Your spaceship is already launched!"));
    return;
  }
  if (ship->state != SSHIP_STARTED
      || ship->success_rate == 0.0) {
    notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                  _("Your spaceship can't be launched yet!"));
    return;
  }
 
  ship->state = SSHIP_LAUNCHED;
  ship->launch_year = game.info.year;
  arrival = ship->launch_year + (int) ship->travel_time;
 
  notify_player(NULL, NULL, E_SPACESHIP, ftc_server,
                _("The %s have launched a spaceship!  "
                  "It is estimated to arrive at Alpha Centauri in %s."),
                nation_plural_for_player(pplayer),
                textyear(arrival));
 
  send_spaceship_info(pplayer, NULL);
}
 
/**********************************************************************/
void handle_spaceship_place(struct player *pplayer,
                            enum spaceship_place_type type, int num)
{
  (void) do_spaceship_place(pplayer, ACT_REQ_PLAYER, type, num);
}
 
/**********************************************************************/
bool do_spaceship_place(struct player *pplayer, enum action_requester from,
                        enum spaceship_place_type type, int num)
{
  struct player_spaceship *ship = &pplayer->spaceship;
  
  if (ship->state == SSHIP_NONE) {
    if (from == ACT_REQ_PLAYER) {
      notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                    _("Spaceship action received,"
                      " but you don't have a spaceship!"));
    }
 
    return FALSE;
  }
 
  if (ship->state >= SSHIP_LAUNCHED) {
    if (from == ACT_REQ_PLAYER) {
      notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                    _("You can't modify your spaceship after launch!"));
    }
 
    return FALSE;
  }
 
  if (type == SSHIP_PLACE_STRUCTURAL) {
    if (num < 0 || num >= NUM_SS_STRUCTURALS
        || BV_ISSET(ship->structure, num)) {
      return FALSE;
    }
    if (num_spaceship_structurals_placed(ship) >= ship->structurals) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("You don't have any unplaced Space Structurals!"));
      }
 
      return FALSE;
    }
    if (num != 0
        && !BV_ISSET(ship->structure, structurals_info[num].required)) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("That Space Structural would not be connected!"));
      }
 
      return FALSE;
    }
 
    BV_SET(ship->structure, num);
    spaceship_calc_derived(ship);
    send_spaceship_info(pplayer, NULL);
    return TRUE;
  }
 
  if (type == SSHIP_PLACE_FUEL) {
    if (ship->fuel != num - 1) {
      return FALSE;
    }
    if (ship->fuel + ship->propulsion >= ship->components) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("You don't have any unplaced Space Components!"));
      }
 
      return FALSE;
    }
    if (num > NUM_SS_COMPONENTS/2) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("Your spaceship already has"
                        " the maximum number of Fuel Components!"));
      }
 
      return FALSE;
    }
 
    ship->fuel++;
    spaceship_calc_derived(ship);
    send_spaceship_info(pplayer, NULL);
    return TRUE;
  }
 
  if (type == SSHIP_PLACE_PROPULSION) {
    if (ship->propulsion != num - 1) {
      return FALSE;
    }
    if (ship->fuel + ship->propulsion >= ship->components) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("You don't have any unplaced"
                        " Space Components!"));
      }
 
      return FALSE;
    }
    if (num > NUM_SS_COMPONENTS/2) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("Your spaceship already has the"
                        " maximum number of Propulsion Components!"));
      }
 
      return FALSE;
    }
 
    ship->propulsion++;
    spaceship_calc_derived(ship);
    send_spaceship_info(pplayer, NULL);
    return TRUE;
  }
 
  if (type == SSHIP_PLACE_HABITATION) {
    if (ship->habitation != num - 1) {
      return FALSE;
    }
    if (ship->habitation + ship->life_support + ship->solar_panels
        >= ship->modules) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("You don't have any unplaced Space Modules!"));
      }
 
      return FALSE;
    }
    if (num > NUM_SS_MODULES / 3) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("Your spaceship already has the"
                        " maximum number of Habitation Modules!"));
      }
 
      return FALSE;
    }
 
    ship->habitation++;
    spaceship_calc_derived(ship);
    send_spaceship_info(pplayer, NULL);
    return TRUE;
  }
 
  if (type == SSHIP_PLACE_LIFE_SUPPORT) {
    if (ship->life_support != num - 1) {
      return FALSE;
    }
    if (ship->habitation + ship->life_support + ship->solar_panels
        >= ship->modules) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("You don't have any unplaced Space Modules!"));
      }
 
      return FALSE;
    }
    if (num > NUM_SS_MODULES / 3) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("Your spaceship already has the"
                        " maximum number of Life Support Modules!"));
      }
 
      return FALSE;
    }
 
    ship->life_support++;
    spaceship_calc_derived(ship);
    send_spaceship_info(pplayer, NULL);
    return TRUE;
  }
 
  if (type == SSHIP_PLACE_SOLAR_PANELS) {
    if (ship->solar_panels != num - 1) {
      return FALSE;
    }
    if (ship->habitation + ship->life_support + ship->solar_panels
        >= ship->modules) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("You don't have any unplaced Space Modules!"));
      }
 
      return FALSE;
    }
    if (num > NUM_SS_MODULES / 3) {
      if (from == ACT_REQ_PLAYER) {
        notify_player(pplayer, NULL, E_SPACESHIP, ftc_server,
                      _("Your spaceship already has the"
                        " maximum number of Solar Panel Modules!"));
      }
 
      return FALSE;
    }
 
    ship->solar_panels++;
    spaceship_calc_derived(ship);
    send_spaceship_info(pplayer, NULL);
    return TRUE;
  }
 
  log_error("Received unknown spaceship place type %d from %s",
            type, player_name(pplayer));
  return FALSE;
}
 
/**********************************************************************/
void spaceship_arrived(struct player *pplayer)
{
  notify_player(NULL, NULL, E_SPACESHIP, ftc_server,
                _("The %s spaceship has arrived at Alpha Centauri."),
                nation_adjective_for_player(pplayer));
  pplayer->spaceship.state = SSHIP_ARRIVED;
}
 
/**********************************************************************/
void spaceship_lost(struct player *pplayer)
{
  notify_player(NULL, NULL, E_SPACESHIP, ftc_server,
                _("Without guidance from the capital, the %s "
                  "spaceship is lost!"),
                nation_adjective_for_player(pplayer));
  spaceship_init(&pplayer->spaceship);
  send_spaceship_info(pplayer, NULL);
}
 
/**********************************************************************/
double spaceship_arrival(const struct player *pplayer)
{
  const struct player_spaceship *ship = &pplayer->spaceship;
 
  return ship->launch_year + ship->travel_time;
}
 
/**********************************************************************/
int rank_spaceship_arrival(struct player **result)
{
  int n = 0, i;
 
  shuffled_players_iterate(pplayer) {
    struct player_spaceship *ship = &pplayer->spaceship;
    
    if (ship->state == SSHIP_LAUNCHED) {
      result[n++] = pplayer;
    }
  } shuffled_players_iterate_end;
 
  /* An insertion sort will do; n is probably small, and we need a
   * stable sort to preserve the shuffled order for tie-breaking, so can't
   * use qsort() */
  for (i = 1; i < n; i++) {
    int j;
    for (j = i;
         j > 0
         && spaceship_arrival(result[j-1]) > spaceship_arrival(result[j]);
         j--) {
      struct player *tmp = result[j];
      result[j] = result[j-1];
      result[j-1] = tmp;
    }
  }
 
  return n;
}