game.h

   1
   2 /**
   3  *
   4  * Tennix! SDL Port
   5  * Copyright (C) 2003, 2007, 2008 Thomas Perl <thp@perli.net>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  20  * MA  02110-1301, USA.
  21  *
  22  **/
  23
  24 #ifndef __GAME_H
  25 #define __GAME_H
  26
  27 #include <math.h>
  28 #include "tennix.h"
  29 #include "sound.h"
  30
  31 #define SETS_TO_WIN 3
  32
  33 #define NGRAM_STEPS 6
  34
  35 typedef unsigned char bool;
  36 enum {
  37     false,
  38     true
  39 };
  40
  41 enum {
  42     REFEREE_NORMAL,
  43     REFEREE_PLAYER1,
  44     REFEREE_OUT,
  45     REFEREE_PLAYER2
  46 };
  47
  48 enum {
  49     WINNER_NONE,
  50     WINNER_PLAYER1,
  51     WINNER_PLAYER2
  52 };
  53
  54 typedef struct {
  55     float x;
  56     float y;
  57     float move_x;
  58     float move_y;
  59     float jump;
  60 } Ball;
  61
  62 typedef struct {
  63     float x;
  64     float y;
  65     unsigned char state;
  66     unsigned int score;
  67     bool responsible; /* responsible for the next fault (if any) */
  68     unsigned char desire; /* what the player aims to do (0=normal, 1=upper edge, 2=lower edge)*/
  69     bool type; /* is this player ai-controlled or human? */
  70     float ball_dest; /* prospective y-position of ball */
  71     bool state_locked; /* enabled when user keeps pressing the "hit" key */
  72     int game; /* score for the current game */
  73     int sets[SETS_TO_WIN*2]; /* score for each set */
  74     int mouse_x; /* x position of mouse */
  75     int mouse_y; /* y position of mouse */
  76     float accelerate; /* a value [0..1] how fast the user accelerates */
  77     bool mouse_locked; /* on start, ignore unpressed mouse state */
  78 } Player;
  79
  80 enum {
  81     PLAYER_TYPE_HUMAN,
  82     PLAYER_TYPE_AI,
  83 };
  84
  85 enum {
  86     DESIRE_NORMAL,
  87     DESIRE_MAX
  88 };
  89
  90 typedef struct {
  91     Ball ball;
  92     Ball ground;
  93     Player player1;
  94     Player player2;
  95     float phase;
  96     unsigned int time;
  97     bool was_stopped;
  98     bool player1_serves;
  99     char* status;
 100     char game_score_str[50];
 101     char sets_score_str[50];
 102     unsigned char referee;
 103     unsigned int current_set;
 104     int winner;
 105     bool is_over;
 106     unsigned int court_type;
 107     unsigned int old_court_type;
 108     unsigned int history[3];
 109     unsigned int history_size;
 110     bool history_is_locked;
 111     unsigned char ngram[NGRAM_STEPS][NGRAM_STEPS][NGRAM_STEPS];
 112     float ngram_prediction;
 113     sound_id play_sound;
 114     float joystick_y;
 115     float joystick_x;
 116     unsigned char joystick_a;
 117 } GameState;
 118
 119 #define PI 3.1415
 120
 121 #define GAME_TICKS 15
 122
 123 #define GROUND_PHASE 0.4
 124 #define PHASE_AMP 3.2
 125
 126 #define BALL_JUMP_MIN 4
 127 #define BALL_JUMP_MAX 10
 128
 129 #define RACKET_X_MID 15
 130 #define RACKET_Y_MID 24
 131
 132 #define BALL_X_MID 9
 133 #define BALL_Y_MID 9
 134
 135 #define GAME_X_MIN 41.0*2
 136 #define GAME_X_MAX 270.0*2
 137 #define GAME_X_MID ((GAME_X_MIN+GAME_X_MAX)/2)
 138
 139 #define GAME_Y_MIN 155.0
 140 #define GAME_Y_MAX 330.0
 141 #define GAME_Y_MID ((GAME_Y_MIN+GAME_Y_MAX)/2)
 142
 143 #define GAME_EDGE_AREA 20.0
 144 #define GAME_EDGE_UPPER GAME_Y_MIN+GAME_EDGE_AREA
 145 #define GAME_EDGE_LOWER GAME_Y_MAX-GAME_EDGE_AREA
 146
 147 #define PLAYER_Y_MIN 0.0
 148 #define PLAYER_Y_MAX 1.0*HEIGHT
 149
 150 #define IS_OFFSCREEN_Y(y) (((y)<0-BALL_Y_MID*2) || ((y)>HEIGHT+BALL_Y_MID*2))
 151 #define IS_OFFSCREEN_X(x) (((x)<0-BALL_X_MID*2) || ((x)>WIDTH+BALL_X_MID*2))
 152 #define IS_OFFSCREEN(x,y) ((IS_OFFSCREEN_X(x)) || (IS_OFFSCREEN_Y(y)))
 153 #define IS_OUT_Y(y) (y<GAME_Y_MIN || y>GAME_Y_MAX)
 154 #define IS_OUT_X(x) (x<GAME_X_MIN || x>GAME_X_MAX)
 155
 156 #define PLAYER_AREA_Y RACKET_Y_MID
 157 #define PLAYER_AREA_X RACKET_X_MID
 158 #define IS_NEAR_Y(py,by) (fabsf(py-by)<PLAYER_AREA_Y)
 159 #define IS_NEAR_Y_AI(py,by) (fabsf(py-by)<PLAYER_AREA_Y/3.5)
 160 #define IS_NEAR_X(px,bx) (fabsf(px-bx)<PLAYER_AREA_X)
 161 #define IS_NEAR_X_AI(px,bx) (fabsf(px-bx)<PLAYER_AREA_X*2)
 162
 163 #define PLAYER_MOVE_Y 5.0
 164 #define PLAYER_ACCEL_DEFAULT 0.2
 165 #define PLAYER_ACCEL_INCREASE 1.2
 166 #define PLAYER_STATE_MAX 7
 167 #define PLAYER_POWERSHOT 6.2
 168
 169 #define MOVE_Y_SEED 3
 170
 171 /* Comment out the following #define to enable mouse control */
 172 #define ENABLE_MOUSE
 173
 174 /* GameState handling*/
 175 GameState *gamestate_new();
 176
 177
 178 /* Game module functions */
 179 void gameloop(GameState*);
 180 void render( GameState*);
 181 bool step( GameState*);
 182 void limit_value( float*, float, float);
 183 float get_phase( GameState*);
 184 float get_move_y( GameState*, unsigned char);
 185 void input_human( Player*, bool, bool, bool, bool, GameState*);
 186 void input_ai( Player*, Ball*, Player*, GameState*);
 187 void game_setup_serve( GameState*);
 188 float ngram_predictor( GameState*);
 189
 190 void score_game( GameState*, bool);
 191 char* format_sets( GameState*);
 192 char* format_game( GameState*);
 193 char* format_status( GameState*);
 194 int game_get_winner( GameState*);
 195
 196 #endif
 197