mirror of
https://git.zap.org.au/git/trader.git
synced 2025-02-02 15:08:13 -05:00
35abce5052
In summary: share returns can now be negative, decreasing a player's income; the bank interest rate now has a minimum; algorithms for changing share price, share return and bank interest rate are much "smoother" (as modelled with Gnuplot!); many minimum, maximum and typical values have been revised.
216 lines
8.7 KiB
C
216 lines
8.7 KiB
C
/************************************************************************
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* *
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* Star Traders: A Game of Interstellar Trading *
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* Copyright (C) 1990-2012, John Zaitseff *
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* *
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************************************************************************/
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/*
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Author: John Zaitseff <J.Zaitseff@zap.org.au>
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$Id$
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This file, globals.h, contains declarations for global variables and
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structures used in Star Traders.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see http://www.gnu.org/licenses/.
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*/
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#ifndef included_GLOBALS_H
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#define included_GLOBALS_H 1
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/************************************************************************
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* Game constants *
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************************************************************************/
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#define MAX_X 38 // Map dimensions MAX_X x MAX_Y
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#define MAX_Y 14
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#define STAR_RATIO 0.10 // 10% of map should be stars
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#define NUMBER_MOVES 20 // Number of choices on map per turn
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#define DEFAULT_MAX_TURN 50 // Default number of turns per game
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#define MIN_MAX_TURN 10 // Minimum that can be specified for max_turn
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#define MAX_PLAYERS 8 // Maximum number of players
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#define INITIAL_CASH 6000.00 // Initial cash per player
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#define MAX_OVERDRAFT 1000.00 // Max. value player can go negative
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#define MAKE_BANKRUPT 0.07 // If overdraft, 7% chance of bankruptcy
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#define MAX_COMPANIES 8 // Max. number of companies (do not change!)
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#define INITIAL_STOCK_ISSUED 5 // Initial number of shares issued out
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#define INITIAL_MAX_STOCK 50 // Initial max. number of shares available
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#define INITIAL_SHARE_PRICE 60.00 // Initial share price
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#define SHARE_PRICE_INC 60.00 // Share price incr. for increase in shipping
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#define SHARE_PRICE_INC_OUTPOST 75.00 // Incr. for adding an outpost
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#define SHARE_PRICE_INC_OUTSTAR 150.00 // Extra incr. for adding outpost next to star
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#define SHARE_PRICE_INC_STAR 300.00 // Incr. for adding next to star
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#define PRICE_INC_ADJUST_MIN 0.75 // Actual incr. may be as low as 75% of nominal
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#define PRICE_INC_ADJUST_MAX 1.25 // Actual incr. may be as high as 125%
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#define MAX_STOCK_RATIO_MIN 0.10 // Min. multiplier to increment available shares
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#define MAX_STOCK_RATIO_MAX 0.25 // Max. multiplier, using share price incr.
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#define MERGE_STOCK_RATIO 0.50 // 50% of old shares are credited to new company
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#define MERGE_BONUS_RATE 10.0 // Multiplier for merger cash bonus
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#define MERGE_PRICE_ADJUST_MIN 0.40 // Minimum of old share price used as increment
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#define MERGE_PRICE_ADJUST_MAX 0.60 // Maximum of old share price used as increment
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#define COMPANY_BANKRUPTCY 0.03 // 3% chance of company bankruptcy (if return < 0)
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#define ALL_ASSETS_TAKEN 0.20 // 20% chance of assets taken of same
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#define CHANGE_SHARE_PRICE 0.35 // 35% chance for changing share price
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#define DEC_SHARE_PRICE 0.65 // 65% x 35% chance of decrementing same
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#define PRICE_CHANGE_RATE 0.25 // Up to 25% of share price is used to incr./decr.
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#define INITIAL_RETURN 0.05 // Initial return per share: 5%
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#define MIN_COMPANY_RETURN -0.10 // Minimum return per share (yes, negative!)
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#define MAX_COMPANY_RETURN 0.20 // Maximum return per share
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#define CHANGE_COMPANY_RETURN 0.50 // Chance of randomly changing return
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#define DEC_COMPANY_RETURN 0.50 // Chance such change will decrease return
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#define RETURN_MAX_CHANGE 0.03 // Maximum that company return will change
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#define CHANGE_RETURN_GROWING 0.25 // Chance of changing return when company grows
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#define DEC_RETURN_GROWING 0.35 // 35% chance such change will decrement return
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#define GROWING_MAX_CHANGE 0.02 // Maximum that that return can change
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#define OWNERSHIP_BONUS 2.00 // Bonus amount based on percentage ownership
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#define BID_CHANCE 0.75 // 75% chance of successful bidding
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#define MAX_SHARES_BIDDED 200 // Max. number of shares issued
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#define INITIAL_INTEREST_RATE 0.10 // Initial bank interest rate: 10%
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#define MIN_INTEREST_RATE 0.02 // Minimum interest rate
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#define MAX_INTEREST_RATE 0.20 // Maximum interest rate
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#define CHANGE_INTEREST_RATE 0.40 // 40% chance of changing interest rate
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#define DEC_INTEREST_RATE 0.45 // 40% x 45% chance of decrease the same
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#define INTEREST_MAX_CHANGE 0.03 // Maximum that interest rate will change
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#define CREDIT_LIMIT_RATE 2.00 // Multiplier for credit limit
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#define ROUNDING_AMOUNT 0.01 // Round off smaller amounts to zero
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/************************************************************************
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* Game type declarations *
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************************************************************************/
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// Information about each company
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typedef struct company_info {
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wchar_t *name; // Company name
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double share_price; // Share price
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double share_return; // Return per share (may be negative)
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long int stock_issued; // Total stock sold to players
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long int max_stock; // Max. stock that company has
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bool on_map; // True if company on map
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} company_info_t;
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// Information about each player
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typedef struct player_info {
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wchar_t *name; // Player name
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char *name_utf8; // Player name (in UTF-8, for load/save)
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double cash; // Cash available
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double debt; // Amount of debt
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long int stock_owned[MAX_COMPANIES]; // How much stock is owned
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bool in_game; // True if still in the game
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double sort_value; // Total value (only used in end_game())
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} player_info_t;
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// Map values
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typedef enum map_val {
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MAP_EMPTY = '.', // Empty space
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MAP_OUTPOST = '+', // Unowned outpost
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MAP_STAR = '*', // Star
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MAP_A = 'A', // Company A, etc
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MAP_LAST = MAP_A + MAX_COMPANIES - 1
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} map_val_t;
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#define COMPANY_TO_MAP(i) ((i) + MAP_A)
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#define MAP_TO_COMPANY(m) ((m) - MAP_A)
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#define IS_MAP_COMPANY(m) ((m) >= MAP_A && (m) <= MAP_LAST)
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// Information about a move
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typedef struct move_rec {
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int x;
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int y;
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} move_rec_t;
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// Player moves / selection values
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typedef enum selection {
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SEL_COMPANY_FIRST = 0,
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SEL_COMPANY_LAST = MAX_COMPANIES - 1,
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SEL_MOVE_FIRST = 0,
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SEL_MOVE_LAST = NUMBER_MOVES - 1,
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SEL_BANKRUPT, // Player wishes to give up
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SEL_SAVE, // Save and end the game
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SEL_QUIT, // Just end the game
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SEL_BANK, // Visit the Trading Bank
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SEL_EXIT, // Exit the Stock Exchange
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SEL_NONE = -1 // Nothing yet selected
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} selection_t;
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// Company names
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extern const char *company_name[MAX_COMPANIES];
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// Default keycodes (keyboard input characters) for each company
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extern const char *default_keycode_company;
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// Default keycodes (keyboard input characters) for each move
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extern const char *default_keycode_game_move;
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// Default printable output representations for each map element
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extern const char *default_printable_map_val;
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// Default printable output representations for each move
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extern const char *default_printable_game_move;
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// Ordinal strings
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extern const char *ordinal[MAX_PLAYERS + 1];
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/************************************************************************
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* Global variable declarations *
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************************************************************************/
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extern company_info_t company[MAX_COMPANIES]; // Array of companies
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extern player_info_t player[MAX_PLAYERS]; // Array of players
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extern map_val_t galaxy_map[MAX_X][MAX_Y]; // Map of the galaxy
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extern move_rec_t game_move[NUMBER_MOVES]; // Current moves
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extern int max_turn; // Max. number of turns in game
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extern int turn_number; // Current turn (1 to max_turn)
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extern int number_players; // Number of players
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extern int current_player; // Current player (0 to number_players-1)
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extern int first_player; // Who WAS the first player to go?
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extern double interest_rate; // Current interest rate
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extern bool game_loaded; // True if game was loaded from disk
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extern int game_num; // Game number (1-9)
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extern bool quit_selected; // Is a player trying to quit the game?
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extern bool abort_game; // Abort game without declaring winner?
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extern bool option_no_color; // True if --no-color was specified
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extern bool option_dont_encrypt; // True if --dont-encrypt was specified
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extern int option_max_turn; // Max. turns if --max-turn was specified
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#endif /* included_GLOBALS_H */
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