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