game.c

   1
   2 /**
   3  *
   4  * Tennix! SDL Port
   5  * Copyright (C) 2003, 2007, 2008, 2009 Thomas Perl <thp@thpinfo.com>
   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 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <assert.h>
  28 #include <unistd.h>
  29
  30 #include "tennix.h"
  31 #include "game.h"
  32 #include "graphics.h"
  33 #include "input.h"
  34 #include "sound.h"
  35 #include "util.h"
  36
  37
  38 GameState *gamestate_new() {
  39     int x, y, z;
  40     GameState *s;
  41
  42     GameState template = {
  43         NULL,
  44         -1,
  45         { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.6, false, -1, false },
  46         {
  47             { NULL, -1, GAME_X_MIN-RACKET_X_MID*2, GAME_Y_MID, 0.0, POWER_UP_FACTOR, POWER_DOWN_FACTOR, true, 0, DESIRE_NORMAL, PLAYER_TYPE_AI, GAME_Y_MID, false, 0, {0}, 0, 0, PLAYER_ACCEL_DEFAULT, true },
  48             { NULL, -1, GAME_X_MAX+RACKET_X_MID*2, GAME_Y_MID, 0.0, POWER_UP_FACTOR, POWER_DOWN_FACTOR, true, 0, DESIRE_NORMAL, PLAYER_TYPE_AI, GAME_Y_MID, false, 0, {0}, 0, 0, PLAYER_ACCEL_DEFAULT, true },
  49         },
  50         0,
  51         0,
  52         1,
  53         "welcome to tennix " VERSION,
  54         { 0 },
  55         { 0 },
  56         REFEREE_NORMAL,
  57         0,
  58         WINNER_NONE,
  59         false,
  60         GR_COUNT,
  61         { 0 },
  62         0,
  63         false,
  64         { { { 0 } } },
  65         0.0,
  66         0, /* sound events */
  67         0.0,
  68         0.0,
  69         0,
  70         0,
  71         0,
  72         false,
  73         0,
  74         0,
  75         0,
  76         false,
  77         REFEREE_COUNT,
  78         SCORE_UNDECIDED,
  79         0,
  80     };
  81
  82     s = (GameState*)malloc(sizeof(GameState));
  83     if (s == NULL) abort();
  84
  85     memcpy(s, &template, sizeof(GameState));
  86
  87     game_setup_serve(s);
  88
  89     /* smoothen n-gram */
  90     for( x = 0; x<NGRAM_STEPS; x++) {
  91         for( y = 0; y<NGRAM_STEPS; y++) {
  92             for( z = 0; z<NGRAM_STEPS; z++) {
  93                 s->ngram[x][y][z] = 1;
  94             }
  95         }
  96     }
  97
  98     return s;
  99 }
 100
 101
 102 int gamestate_save(GameState* s, const char* filename)
 103 {
 104     Location *location;
 105     const char* status;
 106     InputDevice* input_devices[MAXPLAYERS];
 107     int i, result = 0;
 108     FILE* fp = NULL;
 109 #ifndef WIN32
 110     char tmp[MAXPATHLEN];
 111
 112     assert(getcwd(tmp, MAXPATHLEN) == tmp);
 113     assert(chdir(getenv("HOME")) == 0);
 114 #endif
 115
 116     /**
 117      * Process-specific data (pointers to data
 118      * structures only of interest to this process)
 119      * has to be "removed" before saving.
 120      *
 121      * It can later be restored (in gamestate_load).
 122      **/
 123
 124     fp = fopen(filename, "w");
 125     if (fp == NULL) {
 126         return -1;
 127     }
 128
 129     /* Save data for later recovery + clear */
 130     location = s->location;
 131     s->location = NULL;
 132     status = s->status;
 133     s->status = NULL;
 134     for (i=1; i<=MAXPLAYERS; i++) {
 135         input_devices[i-1] = PLAYER(s, i).input;
 136         PLAYER(s, i).input = NULL;
 137     }
 138
 139     if (fwrite(s, sizeof(GameState), 1, fp) != 1) {
 140         result = -2;
 141     }
 142
 143     /* Restore process-specific data */
 144     s->location = location;
 145     s->status = status;
 146     for (i=1; i<=MAXPLAYERS; i++) {
 147         PLAYER(s, i).input = input_devices[i-1];
 148     }
 149
 150     fclose(fp);
 151
 152 #ifndef WIN32
 153     assert(chdir(tmp) == 0);
 154 #endif
 155
 156     return result;
 157 }
 158
 159
 160 GameState* gamestate_load(const char* filename)
 161 {
 162     FILE* fp;
 163     GameState* s = NULL;
 164 #ifndef WIN32
 165     char tmp[MAXPATHLEN];
 166
 167     assert(getcwd(tmp, MAXPATHLEN) == tmp);
 168     assert(chdir(getenv("HOME")) == 0);
 169 #endif
 170
 171     fp = fopen(filename, "r");
 172
 173     if (fp != NULL) {
 174         s = (GameState*)malloc(sizeof(GameState));
 175         if (s != NULL) {
 176             if (fread(s, sizeof(GameState), 1, fp) == 1) {
 177                 /* Restore/create process-specific data */
 178                 s->status = format_status(s);
 179                 /* FIXME: s->location, players' "input" */
 180             } else {
 181                 free(s);
 182                 s = NULL;
 183             }
 184         }
 185         fclose(fp);
 186     }
 187
 188 #ifndef WIN32
 189     assert(chdir(tmp) == 0);
 190 #endif
 191
 192     return s;
 193 }
 194
 195
 196 void gameloop(GameState *s) {
 197     Uint32 ot = SDL_GetTicks();
 198     Uint32 nt;
 199     Uint32 dt = GAME_TICKS;
 200     Uint32 diff;
 201     Uint32 accumulator = 0;
 202     bool quit = false;
 203
 204 #ifdef ENABLE_FPS_LIMIT
 205     Uint32 ft, frames; /* frame timer and frames */
 206 #endif
 207
 208     strcpy(s->game_score_str, format_game(s));
 209     strcpy(s->sets_score_str, format_sets(s));
 210     s->text_changed = true;
 211
 212     if (s->rain > 0) {
 213         play_sample_background(SOUND_RAIN);
 214     }
 215     if (s->location->max_visitors > 100) {
 216         play_sample_loop(SOUND_AUDIENCE);
 217     }
 218     /* Reset the court type, so it is redrawn on first display */
 219     s->displayed_court_type = GR_COUNT;
 220
 221 #ifdef ENABLE_FPS_LIMIT
 222     frames = 0;
 223     ft = SDL_GetTicks();
 224 #endif
 225     while( !quit) {
 226         nt = SDL_GetTicks();
 227         diff = nt-ot;
 228         if( diff > 2000) {
 229             diff = 0;
 230         }
 231
 232         accumulator += diff;
 233         ot = nt;
 234
 235         while( accumulator >= dt) {
 236             quit = step(s);
 237             s->time += dt;
 238             s->windtime += s->wind*dt;
 239             accumulator -= dt;
 240
 241             if( s->was_stopped) {
 242                 ot = SDL_GetTicks();
 243                 s->was_stopped = false;
 244             }
 245         }
 246         if (s->timelimit != 0 && s->time >= s->timelimit) {
 247             quit = 1;
 248         }
 249
 250 #ifdef ENABLE_FPS_LIMIT
 251         while (frames*1000.0/((float)(SDL_GetTicks()-ft+1))>(float)(DEFAULT_FPS)) {
 252             SDL_Delay(10);
 253         }
 254         frames++;
 255 #endif
 256
 257         render(s);
 258     }
 259
 260     clear_screen();
 261     store_screen();
 262
 263     stop_sample(SOUND_AUDIENCE);
 264     stop_sample(SOUND_RAIN);
 265 }
 266
 267 bool step( GameState* s) {
 268     Uint8 *keys;
 269     SDL_Event e;
 270     bool ground_event = false;
 271     int p;
 272
 273     if (s->ball.z < 0) {
 274         /* ground event */
 275         ground_event = true;
 276
 277         s->referee = REFEREE_NORMAL;
 278
 279         /* bounce from the ground */
 280         if (absf(s->ball.move_z) > 0.3) {
 281             s->sound_events |= SOUND_EVENT_GROUND;
 282             sample_volume_group(SOUND_GROUND_FIRST, SOUND_GROUND_LAST, maxf(0.0, minf(1.0, absf(s->ball.move_z)/2)));
 283             pan_sample_group(SOUND_GROUND_FIRST, SOUND_GROUND_LAST, maxf(0.0, minf(1.0, (s->ball.x)/WIDTH)));
 284             s->ball.move_z *= -s->ball.restitution;
 285         } else {
 286             s->ball.move_z = 0;
 287         }
 288         s->ball.z = 0;
 289     }
 290
 291     if (NET_COLLISION_BALL(s->ball)) {
 292         /* the net blocks movement of the ball */
 293         while (NET_COLLISION_BALL(s->ball)) {
 294             /* make sure the ball appears OUTSIDE of the net */
 295             if (s->ball.move_x < 0) {
 296                 s->ball.x += 1;
 297             } else {
 298                 s->ball.x -= 1;
 299             }
 300         }
 301         s->ball.move_x = 0;
 302         s->ball.move_y = 0;
 303     }
 304
 305     /* see if we have something to score */
 306     if (s->score_event == SCORE_UNDECIDED) {
 307         if (NET_COLLISION_BALL(s->ball)) {
 308             /* the ball "fell" into the net  */
 309             s->score_event = SCORE_EVENT_NET;
 310             s->sound_events |= SOUND_EVENT_OUT;
 311             s->status = "net!";
 312         } else if (IS_OFFSCREEN(s->ball.x, s->ball.y)) {
 313             /* ball flew offscreen */
 314             s->score_event = SCORE_EVENT_OFFSCREEN;
 315             s->sound_events |= SOUND_EVENT_OUT;
 316             s->status = "out!";
 317         } else if (ground_event) {
 318             /* the ball hit the ground on the screen */
 319             if (IS_OUT(s->ball.x, s->ball.y)) {
 320                 /* the ball bounced in the OUT area */
 321                 s->score_event = SCORE_EVENT_OUT;
 322                 s->sound_events |= SOUND_EVENT_OUT;
 323                 s->status = "out!";
 324             } else if (GROUND_IS_VALID(s->ball.last_hit_by, s->ball.x, s->ball.y)) {
 325                 if (s->ball.ground_hit) {
 326                     s->score_event = SCORE_EVENT_GROUND_VALID;
 327                     s->sound_events |= SOUND_EVENT_OUT;
 328                     s->status = "did not catch the ball!";
 329                 } else {
 330                     /* first ground hit in valid area */
 331                     s->ball.ground_hit = true;
 332                 }
 333             } else {
 334                 /* ball hit somewhere invalid */
 335                 s->score_event = SCORE_EVENT_GROUND_INVALID;
 336                 s->sound_events |= SOUND_EVENT_OUT;
 337                 s->status = "fault!";
 338             }
 339         }
 340     }
 341
 342     if (s->score_event != SCORE_UNDECIDED) {
 343         /* we have some scoring to do */
 344         if (s->score_time == 0) {
 345             /* schedule scoring in the future */
 346             s->score_time = s->time + SCORING_DELAY;
 347             s->referee = REFEREE_OUT;
 348         } else if (s->time >= s->score_time) {
 349             /* time has ran out - score now */
 350             switch (score_game(s)) {
 351                 case WINNER_PLAYER1:
 352                     s->status = "player 1 scores";
 353                     s->referee = REFEREE_PLAYER1;
 354                     break;
 355                 case WINNER_PLAYER2:
 356                     s->status = "player 2 scores";
 357                     s->referee = REFEREE_PLAYER2;
 358                     break;
 359                 default:
 360                     assert(0);
 361                     break;
 362             }
 363             s->score_time = 0;
 364
 365             strcpy(s->game_score_str, format_game(s));
 366             strcpy(s->sets_score_str, format_sets(s));
 367             s->text_changed = true;
 368
 369             game_setup_serve(s);
 370             if (s->location->max_visitors > 100) {
 371                 s->sound_events |= SOUND_EVENT_APPLAUSE;
 372             }
 373             /*FIXME n-gram predictor broken
 374             s->history_size = 0;
 375             s->history_is_locked = 0;
 376             s->ngram_prediction = 0.0;*/
 377         }
 378     } else {
 379         /* score is still undecided - do the racket swing thing */
 380         for (p=1; p<=2; p++) {
 381             if (IS_NEAR_X(PLAYER(s, p).x, s->ball.x) && IS_NEAR_Y(PLAYER(s, p).y, s->ball.y-s->ball.z) && PLAYER(s, p).use_power && PLAYER(s, p).power > 30.0 && s->ball.last_hit_by != p) {
 382                 /* RACKET HIT */
 383                 if (!s->ball.ground_hit && s->ball.move_x != 0.0) {
 384                     s->status = "volley!";
 385                 } else {
 386                     s->status = format_status(s);
 387                 }
 388                 switch (PLAYER(s, p).desire) {
 389                     case DESIRE_NORMAL:
 390                         /* normal swing */
 391                         s->ball.move_x = 2.7 + 2.0*PLAYER(s, p).power/PLAYER_POWER_MAX;
 392                         s->ball.move_z = 1.2*PLAYER(s, p).power/PLAYER_POWER_MAX;
 393                         break;
 394                     case DESIRE_TOPSPIN:
 395                         /* top spin */
 396                         s->ball.move_x = 1.1 + 2.2*PLAYER(s, p).power/PLAYER_POWER_MAX;
 397                         s->ball.move_z = 2.5*PLAYER(s, p).power/PLAYER_POWER_MAX;
 398                         break;
 399                     case DESIRE_SMASH:
 400                         /* smash */
 401                         s->ball.move_x = 4.0 + 3.0*PLAYER(s, p).power/PLAYER_POWER_MAX;
 402                         s->ball.move_z = 1.1*PLAYER(s, p).power/PLAYER_POWER_MAX;
 403                         break;
 404                 }
 405                 s->ball.move_y = get_move_y( s, p);
 406                 s->sound_events |= SOUND_EVENT_RACKET;
 407                 s->ball.ground_hit = false;
 408                 s->ball.inhibit_gravity = false;
 409                 s->ball.last_hit_by = p;
 410                 if (p==1) {
 411                     pan_sample_group(SOUND_RACKET_FIRST, SOUND_RACKET_LAST, 0.3);
 412                 } else {
 413                     pan_sample_group(SOUND_RACKET_FIRST, SOUND_RACKET_LAST, 0.7);
 414                     s->ball.move_x *= -1;
 415                 }
 416             }
 417         }
 418     }
 419
 420 #if 0
 421     FIXME n-gram predictor broken
 422     if( IS_OUT_X(s->ball.x) || IS_OFFSCREEN_Y(s->ball.y)) {
 423         if( IS_OUT_X(s->ball.x)) {
 424             /*if( !s->history_is_locked && s->referee != REFEREE_OUT) {
 425                 s->history[s->history_size] = (int)(NGRAM_STEPS*s->ball.y/HEIGHT);
 426                 s->history_size++;
 427                 if( s->history_size == 3) {
 428                     s->ngram[s->history[0]][s->history[1]][s->history[2]] += 10;
 429                     s->ngram_prediction = ngram_predictor( s);
 430                     s->history[0] = s->history[1];
 431                     s->history[1] = s->history[2];
 432                     s->history_size--;
 433                 }
 434                 s->history_is_locked = true;
 435             }*/
 436         }
 437     } else {
 438         /*s->history_is_locked = false;*/
 439     }
 440 #endif
 441
 442     SDL_PumpEvents();
 443     keys = SDL_GetKeyState(NULL);
 444
 445     if( s->time%50==0) {
 446         if (keys['r']) {
 447             if (s->rain == 0) {
 448                 play_sample_background(SOUND_RAIN);
 449             }
 450             s->rain += 10;
 451         }
 452         if (keys['t']) {
 453             s->fog++;
 454         }
 455         if (keys['1']) {
 456             s->wind++;
 457         }
 458         if (keys['2']) {
 459             s->wind--;
 460         }
 461     }
 462
 463     if(!(SDL_GetTicks() < fading_start+FADE_DURATION) && !s->is_over) {
 464         for (p=1; p<=MAXPLAYERS; p++) {
 465             if( PLAYER(s, p).type == PLAYER_TYPE_HUMAN) {
 466                 input_human(s, p);
 467             } else {
 468                 input_ai(s, p);
 469             }
 470         }
 471     }
 472
 473     /* Maemo: The "F6" button is the "Fullscreen" button */
 474     /*if( keys['f'] || keys[SDLK_F6]) SDL_WM_ToggleFullScreen( screen);*/
 475     if( keys['y']) SDL_SaveBMP( screen, "screenshot.bmp");
 476
 477     /* Maemo: The "F4" button is the "Open menu" button */
 478     if( keys['p'] || keys[SDLK_F4]) {
 479         while( keys['p'] || keys[SDLK_F4]) {
 480             SDL_PollEvent( &e);
 481             keys = SDL_GetKeyState( NULL);
 482             SDL_Delay( 10);
 483         }
 484         while( (keys['p'] || keys[SDLK_F4]) == 0) {
 485             SDL_PollEvent( &e);
 486             keys = SDL_GetKeyState( NULL);
 487             SDL_Delay( 10);
 488         }
 489         while( keys['p'] || keys[SDLK_F4]) {
 490             SDL_PollEvent( &e);
 491             keys = SDL_GetKeyState( NULL);
 492             SDL_Delay( 10);
 493         }
 494         s->was_stopped = true;
 495     }
 496
 497     if( keys[SDLK_ESCAPE] || keys['q']) return true;
 498
 499     limit_value( &PLAYER(s, 1).y, PLAYER_Y_MIN, PLAYER_Y_MAX);
 500     limit_value( &PLAYER(s, 2).y, PLAYER_Y_MIN, PLAYER_Y_MAX);
 501
 502     if (s->ball.move_x > 0 && s->wind > 0) {
 503         s->ball.x += absf(s->wind)/2;
 504     } else if (s->ball.move_x < 0 && s->wind < 0) {
 505         s->ball.x -= absf(s->wind)/2;
 506     }
 507
 508     s->ball.z += s->ball.move_z;
 509     if (!s->ball.inhibit_gravity) {
 510         s->ball.move_z += GRAVITY;
 511     }
 512
 513     s->ball.x += s->ball.move_x;
 514     s->ball.y += s->ball.move_y;
 515
 516     for (p=1; p<=MAXPLAYERS; p++) {
 517         if (PLAYER(s, p).use_power) {
 518             PLAYER(s, p).power = maxf(0.0, minf(PLAYER(s, p).power*PLAYER(s, p).power_down_factor, PLAYER_POWER_MAX));
 519         }
 520     }
 521
 522     return false;
 523 }
 524
 525 void render( GameState* s) {
 526     int x, y, b;
 527     unsigned int i;
 528     float zoom;
 529     float rotate;
 530 #ifdef EXTENDED_REFEREE
 531     int t=1000;
 532 #endif
 533     if (s->sound_events != 0) {
 534         if (s->sound_events & SOUND_EVENT_GROUND) {
 535             play_sample(SOUND_GROUND);
 536         }
 537         if (s->sound_events & SOUND_EVENT_OUT) {
 538             play_sample(SOUND_OUT);
 539         }
 540         if (s->sound_events & SOUND_EVENT_APPLAUSE) {
 541             play_sample(SOUND_APPLAUSE);
 542         }
 543         if (s->sound_events & SOUND_EVENT_RACKET) {
 544             play_sample(SOUND_RACKET);
 545         }
 546         s->sound_events = 0;
 547     }
 548     if( s->winner != WINNER_NONE) {
 549         if( !s->is_over) {
 550             start_fade();
 551             s->is_over = true;
 552         }
 553         clear_screen();
 554         store_screen();
 555         show_sprite( GR_RACKET, 2*(s->winner-1), 4, WIDTH/2 - get_image_width( GR_RACKET)/8, HEIGHT/2 - get_image_height( GR_RACKET), 255);
 556         sprintf( s->game_score_str, "player %d wins the match with %s", s->winner, format_sets( s));
 557         font_draw_string(FONT_LARGE, s->game_score_str, (WIDTH-font_get_string_width(FONT_LARGE, s->game_score_str))/2, HEIGHT/2 + 30);
 558         updatescr();
 559         return;
 560     }
 561     if (s->displayed_court_type != s->location->court_type || s->text_changed || s->old_referee != s->referee) {
 562         clear_screen();
 563         fill_image(s->location->court_type, 120, 120, 400, 250);
 564         show_image(GR_COURT, 0, 0, 255);
 565         font_draw_string(FONT_XLARGE, s->game_score_str, 14, 14);
 566         font_draw_string(FONT_XLARGE, s->sets_score_str, (WIDTH-font_get_string_width(FONT_XLARGE, s->sets_score_str))-14, 14);
 567         if (s->location->has_referee) {
 568 #ifdef EXTENDED_REFEREE
 569             switch (s->referee) {
 570                 case REFEREE_NORMAL:
 571                     t = 1000;
 572                     break;
 573                 case REFEREE_OUT:
 574                     t = 200;
 575                     break;
 576                 case REFEREE_PLAYER1:
 577                 case REFEREE_PLAYER2:
 578                     t = 400;
 579                     break;
 580             }
 581             t = (s->time/t)%4;
 582             switch (t) {
 583                 case 0:
 584                     t=0;
 585                     break;
 586                 case 1:
 587                     t=1;
 588                     break;
 589                 case 2:
 590                     t=0;
 591                     break;
 592                 case 3:
 593                     t=2;
 594                     break;
 595             }
 596             show_sprite( GR_REFEREE, s->referee*3+t, 12, 250, 10, 255);
 597             if (voice_finished_flag == 0) {
 598                 show_sprite(GR_TALK, (s->time/150)%2, 2, 280, 45, 255);
 599             }
 600 #else
 601             show_sprite( GR_REFEREE, s->referee, 4, 250, 10, 255);
 602 #endif
 603         }
 604         s->displayed_court_type = s->location->court_type;
 605         s->text_changed = false;
 606         s->old_referee = s->referee;
 607         store_screen();
 608     }
 609
 610    /* show_sprite( GR_RACKET, (!PLAYER(s, 1).state), 4, PLAYER(s, 1).x-RACKET_X_MID, PLAYER(s, 1).y-RACKET_Y_MID, 255);
 611     show_sprite( GR_RACKET, (!PLAYER(s, 2).state)+2, 4, PLAYER(s, 2).x-RACKET_X_MID, PLAYER(s, 2).y-RACKET_Y_MID, 255);*/
 612     show_sprite( GR_RACKET, !PLAYER(s, 1).use_power, 4, PLAYER(s, 1).x-RACKET_X_MID, PLAYER(s, 1).y-RACKET_Y_MID, 255);
 613     show_sprite( GR_RACKET, !PLAYER(s, 2).use_power + 2, 4, PLAYER(s, 2).x-RACKET_X_MID, PLAYER(s, 2).y-RACKET_Y_MID, 255);
 614
 615     rectangle(10, HEIGHT-30, PLAYER_POWER_MAX, 10, 50, 50, 50);
 616     rectangle(WIDTH-PLAYER_POWER_MAX-10, HEIGHT-30, PLAYER_POWER_MAX, 10, 50, 50, 50);
 617
 618     rectangle(10, HEIGHT-30, (int)(PLAYER(s, 1).power), 10, 200, 200, 200);
 619     rectangle(WIDTH-PLAYER_POWER_MAX-10, HEIGHT-30, (int)(PLAYER(s, 2).power), 10, 200, 200, 200);
 620
 621     if( s->ball.move_x > 0) {
 622         b = (s->time/100)%BALL_STATES;
 623     } else if( s->ball.move_x < 0) {
 624         b = BALL_STATES-1-(s->time/100)%BALL_STATES;
 625     } else {
 626         b = 0;
 627     }
 628
 629     rotate = 0.0;
 630     zoom = maxf(0.5, minf(1.0, (float)(30.-(s->ball.z))/10.));
 631     show_image_rotozoom(GR_SHADOW, s->ball.x, s->ball.y+3, rotate, zoom);
 632
 633     rotate = (-s->ball.move_x * (float)((float)s->time/10.));
 634     zoom = 1.0 + maxf(0.0, (s->ball.z-10.)/100.);
 635     show_image_rotozoom(GR_BALL, s->ball.x, s->ball.y - s->ball.z, rotate, zoom);
 636
 637     /* Player 1's mouse rectangle */
 638     if (PLAYER(s, 1).input != NULL && PLAYER(s, 1).input->type == INPUT_TYPE_MOUSE) {
 639         rectangle(PLAYER(s, 1).x-2+5, PLAYER(s, 1).input->my-2, 4, 4, 255, 255, 255);
 640         rectangle(PLAYER(s, 1).x-1+5, PLAYER(s, 1).input->my-1, 2, 2, 0, 0, 0);
 641     }
 642
 643     /* Player 2's mouse rectangle */
 644     if (PLAYER(s, 2).input != NULL && PLAYER(s, 2).input->type == INPUT_TYPE_MOUSE) {
 645         rectangle(PLAYER(s, 2).x-2+5, PLAYER(s, 2).input->my-2, 4, 4, 255, 255, 255);
 646         rectangle(PLAYER(s, 2).x-1+5, PLAYER(s, 2).input->my-1, 2, 2, 0, 0, 0);
 647     }
 648
 649     font_draw_string(FONT_MEDIUM, s->status, (WIDTH-font_get_string_width(FONT_MEDIUM, s->status))/2, HEIGHT-50);
 650
 651     for (i=0; i<s->rain; i++) {
 652         x = rand()%WIDTH;
 653         y = rand()%HEIGHT;
 654         draw_line_faded(x, y, x+10+s->wind*5, y+30, 0, 0, 255, 100, 200, 255);
 655     }
 656     if (s->rain) {
 657         /**
 658          * Cheap-ish update of the whole screen. This can
 659          * probably be optimized.
 660          **/
 661         update_rect(0, 0, WIDTH, HEIGHT);
 662     }
 663
 664 #ifdef DEBUG
 665     line_horiz( PLAYER(s, 1).y, 255, 0, 0);
 666     line_horiz( PLAYER(s, 2).y, 0, 0, 255);
 667     line_horiz( s->ball.y, 0, 255, 0);
 668
 669     line_vert( PLAYER(s, 1).x, 255, 0, 0);
 670     line_vert( PLAYER(s, 2).x, 0, 0, 255);
 671     line_vert( s->ball.x, 0, 255, 0);
 672
 673     line_horiz( GAME_Y_MIN, 100, 100, 100);
 674     line_horiz( GAME_Y_MAX, 100, 100, 100);
 675 #endif
 676     switch (s->fog) {
 677         default:
 678         case 4:
 679             fill_image_offset(GR_FOG2, 0, 0, WIDTH, HEIGHT, -s->time/150-s->windtime/200, 0);
 680         case 3:
 681             fill_image_offset(GR_FOG, 0, 0, WIDTH, HEIGHT, -s->time/100-s->windtime/150, 20);
 682         case 2:
 683             fill_image_offset(GR_FOG2, 0, 0, WIDTH, HEIGHT, -s->time/180-s->windtime/180, 80);
 684         case 1:
 685             fill_image_offset(GR_FOG, 0, 0, WIDTH, HEIGHT, s->time/200-s->windtime/100, 0);
 686         case 0:
 687             break;
 688     }
 689     if (s->night) {
 690         show_image(GR_NIGHT, 0, 0, 255);
 691     }
 692
 693     updatescr();
 694 }
 695
 696 void limit_value( float* value, float min, float max) {
 697     if( *value < min) {
 698         *value = min;
 699     } else if( *value > max) {
 700         *value = max;
 701     }
 702 }
 703
 704 float get_move_y( GameState* s, unsigned char player) {
 705     float pct, dest, x_len, y_len;
 706     float py, by, pa, move_x;
 707
 708     py = (player==1)?(PLAYER(s, 1).y):(PLAYER(s, 2).y);
 709     by = s->ball.y - s->ball.z;
 710     pa = RACKET_Y_MID*2;
 711     move_x = s->ball.move_x;
 712
 713     /* -1.0 .. 1.0 for racket hit position */
 714     pct = maxf(-1.0, minf(1.0, (by-py)/(pa/2)));
 715
 716     /* Y destination for ball */
 717     dest = GAME_Y_MID + pct*(GAME_Y_MAX-GAME_Y_MIN);
 718
 719     /* lengths for the ball's journey */
 720     if( player == 1) {
 721         x_len = GAME_X_MAX - s->ball.x;
 722     } else {
 723         x_len = s->ball.x - GAME_X_MIN;
 724     }
 725     y_len = dest - by + MOVE_Y_SEED-rand()%MOVE_Y_SEED*2;
 726
 727     /* return the should-be value for move_y */
 728     return (y_len*move_x)/(x_len);
 729 }
 730
 731 void input_human(GameState* s, int player) {
 732     bool hit, topspin, smash;
 733     float move_y;
 734
 735     /* For mouse input, hand the player coordinates to the InputDevice */
 736     if (PLAYER(s, player).input->type == INPUT_TYPE_MOUSE) {
 737         PLAYER(s, player).input->player_x = (int)(PLAYER(s, player).x);
 738         PLAYER(s, player).input->player_y = (int)(PLAYER(s, player).y);
 739     }
 740
 741     move_y = PLAYER_MOVE_Y*input_device_get_axis(PLAYER(s, player).input, INPUT_AXIS_Y);
 742
 743     hit = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_HIT);
 744     topspin = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_TOPSPIN);
 745     smash = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_SMASH);
 746
 747     if (move_y != 0) {
 748         if (absf(move_y) > absf(move_y*PLAYER(s, player).accelerate)) {
 749             move_y *= PLAYER(s, player).accelerate;
 750         }
 751         PLAYER(s, player).y += move_y;
 752         PLAYER(s, player).accelerate *= PLAYER_ACCEL_INCREASE;
 753     } else {
 754         PLAYER(s, player).accelerate = PLAYER_ACCEL_DEFAULT;
 755     }
 756
 757     if(hit || topspin || smash) {
 758         PLAYER(s, player).desire = (topspin)?(DESIRE_TOPSPIN):(DESIRE_NORMAL);
 759         PLAYER(s, player).desire = (smash)?(DESIRE_SMASH):(PLAYER(s, player).desire);
 760
 761         PLAYER(s, player).power = maxf(10.0, minf(PLAYER(s, player).power*PLAYER(s, player).power_up_factor, PLAYER_POWER_MAX));
 762         PLAYER(s, player).use_power = false;
 763     } else {
 764         PLAYER(s, player).use_power = true;
 765     }
 766 }
 767
 768 void input_ai(GameState* s, int player) {
 769     float fact = 1.7;
 770     float target;
 771     int ball_approaching = 0;
 772
 773     if ((PLAYER(s, player).x < GAME_X_MID && s->ball.move_x <= 0) ||
 774         (PLAYER(s, player).x > GAME_X_MID && s->ball.move_x >= 0)) {
 775         ball_approaching = 1;
 776     }
 777
 778     /* FIXME - this is broken since the new physics model has been introduced */
 779
 780     if (absf(PLAYER(s, player).y - (s->ball.y-s->ball.z)) > RACKET_Y_MID*5) {
 781         fact = 3.5;
 782     }
 783
 784     if(1) {
 785         if( PLAYER(s, player).desire == DESIRE_NORMAL && !IS_NEAR_Y_AI(PLAYER(s, player).y, (s->ball.y-s->ball.z)) && ball_approaching) {
 786             if( PLAYER(s, player).y < (s->ball.y-s->ball.z)) {
 787                 PLAYER(s, player).y += minf(2*fact, (s->ball.y-s->ball.z) - PLAYER(s, player).y);
 788             } else if( PLAYER(s, player).y > (s->ball.y-s->ball.z)) {
 789                 PLAYER(s, player).y -= minf(2*fact, PLAYER(s, player).y - (s->ball.y-s->ball.z));
 790             }
 791         }
 792
 793         if (IS_NEAR_Y(PLAYER(s, player).y, (s->ball.y-s->ball.z)) && IS_NEAR_X_AI(PLAYER(s, player).x, s->ball.x) && PLAYER(s, player).power > 90.) {
 794             PLAYER(s, player).use_power = true;
 795         } else if (ball_approaching) {
 796             PLAYER(s, player).power = maxf(10., minf(PLAYER(s, player).power*PLAYER(s, player).power_up_factor, PLAYER_POWER_MAX));
 797             PLAYER(s, player).use_power = false;
 798         }
 799     } else if( s->ngram_prediction > 0.0) {
 800         target = s->ngram_prediction*((float)HEIGHT)/((float)(NGRAM_STEPS));
 801         target = GAME_Y_MID + (target-GAME_Y_MID)*1.5;
 802
 803         if( PLAYER(s, player).desire == DESIRE_NORMAL && !IS_NEAR_Y_AI( PLAYER(s, player).y, target)) {
 804             if( PLAYER(s, player).y < target) {
 805                 PLAYER(s, player).y += minf(fact, (target-PLAYER(s, player).y)/40.0);
 806             } else if( PLAYER(s, player).y > target) {
 807                 PLAYER(s, player).y -= minf(fact, (PLAYER(s, player).y-target)/40.0);
 808             }
 809         }
 810     }
 811 }
 812
 813 void game_setup_serve( GameState* s) {
 814     s->ball.z = 10.0;
 815     s->ball.y = GAME_Y_MID;
 816     s->ball.move_x = 0.0;
 817     s->ball.move_y = 0.0;
 818     s->ball.move_z = 0.0;
 819     s->ball.last_hit_by = -1;
 820     s->ball.inhibit_gravity = true;
 821
 822     if( s->serving_player == 1) {
 823         s->ball.x = GAME_X_MIN-RACKET_X_MID*1.5;
 824     } else {
 825         s->ball.x = GAME_X_MAX+RACKET_X_MID*1.5;
 826     }
 827 }
 828
 829 float ngram_predictor( GameState* s) {
 830     unsigned int count = 0;
 831     unsigned long sum = 0;
 832     int x, y, z;
 833     float result;
 834
 835     if( s->history_size < 3) {
 836         return 0.0;
 837     }
 838
 839     x = s->history[1];
 840     y = s->history[2];
 841
 842     for( z = 0; z<NGRAM_STEPS; z++) {
 843         count += s->ngram[x][y][z];
 844         sum += z * s->ngram[x][y][z];
 845     }
 846
 847     result = ((float)(sum))/((float)(count));
 848 #ifdef DEBUG
 849     printf( "predicting next = %.2f\n", result);
 850 #endif
 851
 852     return result;
 853 }
 854
 855 int score_game(GameState* s) {
 856     Player *last_hit_by = NULL;
 857     Player *other = NULL;
 858
 859     Player* winner = NULL;
 860     Player* loser = NULL;
 861
 862     /* determine "last hit by" and "other" */
 863     if (s->ball.last_hit_by == 1) {
 864         last_hit_by = &(PLAYER(s, 1));
 865         other = &(PLAYER(s, 2));
 866     } else {
 867         last_hit_by = &(PLAYER(s, 2));
 868         other = &(PLAYER(s, 1));
 869     }
 870
 871     switch (s->score_event) {
 872         case SCORE_EVENT_NET:
 873             winner = other;
 874             break;
 875         case SCORE_EVENT_OUT:
 876         case SCORE_EVENT_GROUND_INVALID:
 877         case SCORE_EVENT_OFFSCREEN:
 878         case SCORE_EVENT_GROUND_VALID:
 879             if (s->ball.ground_hit) {
 880                 winner = last_hit_by;
 881             } else {
 882                 winner = other;
 883             }
 884             break;
 885         default:
 886             break;
 887     }
 888
 889     /* determine loser based on winner */
 890     if (winner == last_hit_by) {
 891         loser = other;
 892     } else {
 893         loser = last_hit_by;
 894     }
 895
 896     /* we cannot be in an "impossibly high" set */
 897     assert(s->current_set < SETS_TO_WIN*2-1);
 898
 899     winner->game++;
 900     if( loser->game < winner->game-1) {
 901         if( winner->game >= 4) {
 902             winner->game = loser->game = 0;
 903             winner->sets[s->current_set]++;
 904
 905             /* serving is changed when the "game" is over */
 906             s->serving_player = (s->serving_player==1)?(2):(1);
 907
 908 #ifdef HAVE_VOICE_FILES
 909             /* speak the current score */
 910             voice_say_list(4, VOICE_ZERO_IN + (PLAYER(s, 1).sets[s->current_set])*2, VOICE_TO, VOICE_ZERO_OUT + (PLAYER(s, 2).sets[s->current_set])*2, VOICE_IN_THE_FIRST_SET+s->current_set);
 911 #endif
 912
 913             /* scoring the set.. */
 914             if( (winner->sets[s->current_set] == 6 && loser->sets[s->current_set] < 5) ||
 915                 winner->sets[s->current_set] == 7) {
 916                 s->current_set++;
 917                 s->winner = game_get_winner( s);
 918             }
 919         }
 920     }
 921
 922     /* forget this event - we've handled it */
 923     s->score_event = SCORE_UNDECIDED;
 924
 925     if (winner == &PLAYER(s, 1)) {
 926         return WINNER_PLAYER1;
 927     } else {
 928         return WINNER_PLAYER2;
 929     }
 930 }
 931
 932 char* format_sets( GameState* s) {
 933     static char sets[100];
 934     static char tmp[100];
 935     int i, max = s->current_set;
 936
 937     sets[0] = '\0';
 938
 939     if( s->winner != WINNER_NONE) {
 940         max--;
 941     }
 942     for( i=0; i<=max; i++) {
 943         sprintf( tmp, "%d:%d, ", PLAYER(s, 1).sets[i], PLAYER(s, 2).sets[i]);
 944         strcat( sets, tmp);
 945     }
 946
 947     sets[strlen(sets)-2] = '\0';
 948
 949     return sets;
 950 }
 951
 952 char* format_game( GameState* s) {
 953     static char game[100];
 954     static const int game_scoring[] = { 0, 15, 30, 40 };
 955
 956     if( PLAYER(s, 1).game < 4 && PLAYER(s, 2).game < 4) {
 957 #ifdef HAVE_VOICE_FILES
 958         if (PLAYER(s, 1).game > 0 || PLAYER(s, 2).game > 0) {
 959             if (PLAYER(s, 1).game == PLAYER(s, 2).game) {
 960                 voice_say_list(2, VOICE_LOVE_IN + 2*(PLAYER(s, 1).game), VOICE_ALL);
 961             } else {
 962                 voice_say_list(2, VOICE_LOVE_IN + 2*(PLAYER(s, 1).game), VOICE_LOVE_OUT + 2*(PLAYER(s, 2).game));
 963             }
 964         }
 965 #endif
 966         sprintf( game, "%d - %d", game_scoring[PLAYER(s, 1).game], game_scoring[PLAYER(s, 2).game]);
 967     } else if( PLAYER(s, 1).game > PLAYER(s, 2).game) {
 968 #ifdef HAVE_VOICE_FILES
 969         voice_say_list(1, VOICE_ADVANTAGE_PLAYER_ONE);
 970 #endif
 971         strcpy( game, "advantage player 1");
 972     } else if( PLAYER(s, 1).game < PLAYER(s, 2).game) {
 973 #ifdef HAVE_VOICE_FILES
 974         voice_say_list(1, VOICE_ADVANTAGE_PLAYER_TWO);
 975 #endif
 976         strcpy( game, "advantage player 2");
 977     } else {
 978 #ifdef HAVE_VOICE_FILES
 979         voice_say_list(1, VOICE_DEUCE);
 980 #endif
 981         strcpy( game, "deuce");
 982     }
 983
 984     return game;
 985 }
 986
 987 char* format_status( GameState* s) {
 988     static char status[100];
 989     static const char* set_names[] = { "first", "second", "third", "fourth", "fifth" };
 990
 991     sprintf( status, "%d:%d in %s set", PLAYER(s, 1).sets[s->current_set], PLAYER(s, 2).sets[s->current_set], set_names[s->current_set]);
 992
 993     return status;
 994 }
 995
 996 int game_get_winner( GameState* s) {
 997     unsigned int i;
 998     int sets[2] = {0};
 999
1000     for( i=0; i<s->current_set; i++) {
1001         if( PLAYER(s, 1).sets[i] > PLAYER(s, 2).sets[i]) {
1002             sets[0]++;
1003         } else {
1004             sets[1]++;
1005         }
1006     }
1007
1008     if( sets[0] == SETS_TO_WIN) return WINNER_PLAYER1;
1009     if( sets[1] == SETS_TO_WIN) return WINNER_PLAYER2;
1010
1011     return WINNER_NONE;
1012 }
1013