game.h

   1
   2 /**
   3  *
   4  * Tennix! SDL Port
   5  * Copyright (C) 2003, 2007 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
  30 typedef unsigned char bool;
  31 enum {
  32     false,
  33     true
  34 };
  35
  36 enum {
  37     REFEREE_NORMAL,
  38     REFEREE_PLAYER1,
  39     REFEREE_OUT,
  40     REFEREE_PLAYER2
  41 };
  42
  43 typedef struct {
  44     float x;
  45     float y;
  46     float move_x;
  47     float move_y;
  48     float jump;
  49 } Ball;
  50
  51 typedef struct {
  52     float x;
  53     float y;
  54     unsigned char state;
  55     unsigned int score;
  56     bool responsible; /* responsible for the next fault (if any) */
  57     unsigned char desire; /* what the player aims to do (0=normal, 1=upper edge, 2=lower edge)*/
  58     bool type; /* is this player ai-controlled or human? */
  59     float ball_dest; /* prospective y-position of ball */
  60     bool state_locked; /* enabled when user keeps pressing the "hit" key */
  61 } Player;
  62
  63 enum {
  64     PLAYER_TYPE_HUMAN,
  65     PLAYER_TYPE_AI,
  66 };
  67
  68 enum {
  69     DESIRE_NORMAL,
  70     DESIRE_MAX
  71 };
  72
  73 typedef struct {
  74     Ball ball;
  75     Ball ground;
  76     Player player1;
  77     Player player2;
  78     float phase;
  79     unsigned int time;
  80     bool was_stopped;
  81     bool player1_serves;
  82     char* status;
  83     char score_str[10];
  84     unsigned char referee;
  85 } GameState;
  86
  87 #define PI 3.1415
  88
  89 #define GAME_TICKS 15
  90
  91 #define GROUND_PHASE 0.4
  92 #define PHASE_AMP 3.2
  93
  94 #define BALL_JUMP_MIN 4
  95 #define BALL_JUMP_MAX 10
  96 #define BALL_DEFAULT_SPEED 3.0
  97
  98 #define RACKET_X_MID 15
  99 #define RACKET_Y_MID 24
 100
 101 #define BALL_X_MID 9
 102 #define BALL_Y_MID 9
 103
 104 #define GAME_X_MIN 41.0*2
 105 #define GAME_X_MAX 270.0*2
 106 #define GAME_X_MID ((GAME_X_MIN+GAME_X_MAX)/2)
 107
 108 #define GAME_Y_MIN 155.0
 109 #define GAME_Y_MAX 330.0
 110 #define GAME_Y_MID ((GAME_Y_MIN+GAME_Y_MAX)/2)
 111
 112 #define GAME_EDGE_AREA 20.0
 113 #define GAME_EDGE_UPPER GAME_Y_MIN+GAME_EDGE_AREA
 114 #define GAME_EDGE_LOWER GAME_Y_MAX-GAME_EDGE_AREA
 115
 116 #define PLAYER_Y_MIN 0.0
 117 #define PLAYER_Y_MAX 1.0*HEIGHT
 118
 119 #define IS_OFFSCREEN_Y(y) (((y)<0-BALL_Y_MID*2) || ((y)>HEIGHT+BALL_Y_MID*2))
 120 #define IS_OFFSCREEN_X(x) (((x)<0-BALL_X_MID*2) || ((x)>WIDTH+BALL_X_MID*2))
 121 #define IS_OFFSCREEN(x,y) ((IS_OFFSCREEN_X(x)) || (IS_OFFSCREEN_Y(y)))
 122 #define IS_OUT_Y(y) (y<GAME_Y_MIN || y>GAME_Y_MAX)
 123 #define IS_OUT_X(x) (x<GAME_X_MIN || x>GAME_X_MAX)
 124
 125 #define PLAYER_AREA_Y RACKET_Y_MID
 126 #define PLAYER_AREA_X RACKET_X_MID
 127 #define IS_NEAR_Y(py,by) (fabsf(py-by)<PLAYER_AREA_Y)
 128 #define IS_NEAR_Y_AI(py,by) (fabsf(py-by)<PLAYER_AREA_Y/2.5)
 129 #define IS_NEAR_X(px,bx) (fabsf(px-bx)<PLAYER_AREA_X)
 130 #define IS_NEAR_X_AI(px,bx) (fabsf(px-bx)<PLAYER_AREA_X*2)
 131
 132 #define PLAYER_STATE_MAX 7
 133 #define PLAYER_POWERSHOT 6.2
 134
 135 #define MOVE_Y_SEED 3
 136
 137 void game( bool);
 138 void render( GameState*);
 139 bool step( GameState*);
 140 void limit_value( float*, float, float);
 141 float get_phase( GameState*);
 142 float get_move_y( GameState*, unsigned char);
 143 void input_human( Player*, bool, bool, bool);
 144 void input_ai( Player*, Ball*, Player*);
 145 void game_setup_serve( GameState*);
 146
 147 #endif
 148