game.c

   1 #include <stdio.h>
   2 #include <math.h>
   3
   4 #include <SDL/SDL.h>
   5
   6 #include "tennix.h"
   7 #include "game.h"
   8 #include "graphics.h"
   9 #include "input.h"
  10
  11 typedef struct {
  12     float x;
  13     float y;
  14     float move_x;
  15     float move_y;
  16 } Ball;
  17
  18 typedef struct {
  19     float x;
  20     float y;
  21     unsigned char state;
  22     unsigned int score;
  23 } Player;
  24
  25 void game() {
  26     int i, w;
  27     int werbung[4];
  28
  29     Ball ball = { GAME_X_MID, GAME_Y_MID, 2.0, 0.2 };
  30     Player player1 = { GAME_X_MIN-4, GAME_Y_MID, 0, 0 };
  31     Player player2 = { GAME_X_MAX, GAME_Y_MID, 0, 0 };
  32
  33     Uint8 *keys;
  34     SDL_Event e;
  35
  36     for( w=0; w<4; w++) {
  37         werbung[w] = rand()%SPONSOR_COUNT;
  38     }
  39
  40     clearscr();
  41     updatescr();
  42     wait_keypress();
  43
  44     while( 1) {
  45      clearscr();
  46      show_bmp( "data/court.bmp", 0, 0, 255);
  47
  48      for( w=0; w<4; w++) {
  49          show_sprite( SPONSOR_BMP, werbung[w], SPONSOR_COUNT, 60+50*w+5*(w>1), 7, 255);
  50      }
  51
  52      show_sprite( RACKET_BMP, (!player1.state), 4, player1.x, player1.y, 255);
  53      show_sprite( RACKET_BMP, (!player2.state)+2, 4, player2.x, player2.y, 255);
  54
  55      show_bmp( "data/ball.bmp", ball.x, ball.y, 255);
  56
  57      show_bmp( "data/standings.bmp", 115, 160, 255);
  58      show_digit( player1.score/10%10, 140, 180, 100);
  59      show_digit( player1.score%10, 148, 180, 100);
  60      show_digit( 10, 156, 180, 100);
  61      show_digit( player2.score/10%10, 164, 180, 100);
  62      show_digit( player2.score%10, 172, 180, 100);
  63
  64      updatescr();
  65
  66      if( i%2) {
  67          if( IS_OUT_X(ball.x) || IS_OUT_Y(ball.y)) {
  68              if( (IS_OUT_Y(ball.y) && ball.move_y > 0) || (!(player1.state && IS_NEAR_Y(player1.y, ball.y)) && ball.x < GAME_X_MIN)) {
  69                  player2.score++;
  70                  ball.x = GAME_X_MID;
  71                  ball.y = GAME_Y_MID;
  72                  ball.move_x = fabsf( ball.move_x);
  73                  ball.move_y = -0.1;
  74                  wait_keypress();
  75              }
  76
  77              if( (IS_OUT_Y(ball.y) && ball.move_y < 0) || (!(player2.state && IS_NEAR_Y(player2.y, ball.y)) && ball.x > GAME_X_MAX)) {
  78                  player1.score++;
  79                  ball.x = GAME_X_MID;
  80                  ball.y = GAME_Y_MID;
  81                  ball.move_x = -fabsf( ball.move_x);
  82                  ball.move_y = 0.1;
  83                  wait_keypress();
  84              }
  85
  86              if( IS_OUT_X(ball.x)) {
  87                  if( ball.move_x < 0) {
  88                      ball.x = GAME_X_MIN;
  89                      ball.move_x = (2.0+(2.0*(rand()%10))/10.0);
  90                      ball.move_y = GET_MOVE(player1.y,ball.y);
  91                  } else {
  92                      ball.x = GAME_X_MAX;
  93                      ball.move_x = -(2.0+(2.0*(rand()%10))/10.0);
  94                      ball.move_y = GET_MOVE(player2.y,ball.y);
  95                  }
  96              }
  97          }
  98
  99          ball.x += ball.move_x;
 100          ball.y += ball.move_y;
 101
 102          if( player1.state) player1.state--;
 103          if( player2.state) player2.state--;
 104      }
 105
 106      limit_value( &player1.y, GAME_Y_MIN, GAME_Y_MAX);
 107      limit_value( &player2.y, GAME_Y_MIN, GAME_Y_MAX);
 108
 109      SDL_PollEvent( &e);
 110      keys = SDL_GetKeyState( NULL);
 111
 112      if( keys['2']) player1.y-=3;
 113      if( keys['w']) player1.y-=2;
 114      if( keys['s']) player1.y+=2;
 115      if( keys['x']) player1.y+=3;
 116      if( keys['d']) player1.state = 10;
 117
 118      if( keys['9']) player2.y-=3;
 119      if( keys['o']) player2.y-=2;
 120      if( keys['l']) player2.y+=2;
 121      if( keys['.']) player2.y+=3;
 122      if( keys['k']) player2.state = 10;
 123
 124      if( keys['f']) SDL_WM_ToggleFullScreen( screen);
 125
 126      if( keys[SDLK_ESCAPE] || keys['q']) break;
 127
 128
 129      SDL_Delay( 10);
 130      i++;
 131     }
 132
 133 }
 134
 135 void limit_value( float* value, float min, float max) {
 136     if( *value < min) {
 137         *value = min;
 138     } else if( *value > max) {
 139         *value = max;
 140     }
 141 }
 142