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     GameState *s;
  40
  41     GameState template = {
  42         NULL,
  43         -1,
  44         { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.6, false, -1, false },
  45         {
  46             { 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, 0, {0}, PLAYER_ACCEL_DEFAULT },
  47             { 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, 0, {0}, PLAYER_ACCEL_DEFAULT },
  48         },
  49         0,
  50         1,
  51         REFEREE_NORMAL,
  52         0,
  53         WINNER_NONE,
  54         SOUND_EVENT_NONE, /* sound events */
  55         SCORE_UNDECIDED,
  56         0,
  57         EVENTCOUNTER_GAMESTATE_START,
  58         EVENTCOUNTER_GAMESTATE_START,
  59         STATUSMSG_WELCOME,
  60     };
  61
  62     s = (GameState*)malloc(sizeof(GameState));
  63     if (s == NULL) abort();
  64
  65     memcpy(s, &template, sizeof(GameState));
  66
  67     game_setup_serve(s);
  68
  69     return s;
  70 }
  71
  72
  73 int gamestate_save(GameState* s, const char* filename)
  74 {
  75     Location *location;
  76     InputDevice* input_devices[MAXPLAYERS];
  77     int i, result = 0;
  78     FILE* fp = NULL;
  79 #ifndef WIN32
  80     char tmp[MAXPATHLEN];
  81
  82     assert(getcwd(tmp, MAXPATHLEN) == tmp);
  83     assert(chdir(getenv("HOME")) == 0);
  84 #endif
  85
  86     /**
  87      * Process-specific data (pointers to data
  88      * structures only of interest to this process)
  89      * has to be "removed" before saving.
  90      *
  91      * It can later be restored (in gamestate_load).
  92      **/
  93
  94     fp = fopen(filename, "w");
  95     if (fp == NULL) {
  96         return -1;
  97     }
  98
  99     /* Save data for later recovery + clear */
 100     location = s->location;
 101     s->location = NULL;
 102     for (i=1; i<=MAXPLAYERS; i++) {
 103         input_devices[i-1] = PLAYER(s, i).input;
 104         PLAYER(s, i).input = NULL;
 105     }
 106
 107     if (fwrite(s, sizeof(GameState), 1, fp) != 1) {
 108         result = -2;
 109     }
 110
 111     /* Restore process-specific data */
 112     s->location = location;
 113     for (i=1; i<=MAXPLAYERS; i++) {
 114         PLAYER(s, i).input = input_devices[i-1];
 115     }
 116
 117     fclose(fp);
 118
 119 #ifndef WIN32
 120     assert(chdir(tmp) == 0);
 121 #endif
 122
 123     return result;
 124 }
 125
 126
 127 GameState* gamestate_load(const char* filename)
 128 {
 129     FILE* fp;
 130     GameState* s = NULL;
 131 #ifndef WIN32
 132     char tmp[MAXPATHLEN];
 133
 134     assert(getcwd(tmp, MAXPATHLEN) == tmp);
 135     assert(chdir(getenv("HOME")) == 0);
 136 #endif
 137
 138     fp = fopen(filename, "r");
 139
 140     if (fp != NULL) {
 141         s = (GameState*)malloc(sizeof(GameState));
 142         if (s != NULL) {
 143             if (fread(s, sizeof(GameState), 1, fp) == 1) {
 144                 /* Restore/create process-specific data */
 145                 /* FIXME: s->location, players' "input" */
 146             } else {
 147                 free(s);
 148                 s = NULL;
 149             }
 150         }
 151         fclose(fp);
 152     }
 153
 154 #ifndef WIN32
 155     assert(chdir(tmp) == 0);
 156 #endif
 157
 158     return s;
 159 }
 160
 161
 162 void gameloop(GameState *s) {
 163     Uint32 ot = SDL_GetTicks();
 164     Uint32 nt;
 165     Uint32 dt = GAME_TICKS;
 166     Uint32 diff;
 167     Uint32 accumulator = 0;
 168     bool quit = false;
 169     int p;
 170     RenderState r = {
 171         SOUND_EVENT_NONE,
 172         REFEREE_COUNT,
 173         EVENTCOUNTER_RENDERSTATE_START,
 174         EVENTCOUNTER_RENDERSTATE_START,
 175         STATUSMSG_NONE,
 176         NULL,
 177         NULL,
 178         NULL,
 179     };
 180
 181     /* Catch-up with existing sound events */
 182     r.sound_events = s->sound_events;
 183
 184 #ifdef ENABLE_FPS_LIMIT
 185     Uint32 ft, frames; /* frame timer and frames */
 186 #endif
 187
 188     if (s->location->rain > 0) {
 189         play_sample_background(SOUND_RAIN);
 190     }
 191     if (s->location->max_visitors > 100) {
 192         play_sample_loop(SOUND_AUDIENCE);
 193     }
 194
 195     for (p=1; p<=MAXPLAYERS; p++) {
 196         input_device_join_game(PLAYER(s, p).input, s, p);
 197     }
 198
 199 #ifdef ENABLE_FPS_LIMIT
 200     frames = 0;
 201     ft = SDL_GetTicks();
 202 #endif
 203     while( !quit) {
 204         nt = SDL_GetTicks();
 205         diff = nt-ot;
 206         if( diff > 2000) {
 207             diff = 0;
 208         }
 209
 210         accumulator += diff;
 211         ot = nt;
 212
 213         while( accumulator >= dt) {
 214             quit = step(s);
 215             s->time += dt;
 216             accumulator -= dt;
 217         }
 218
 219 #ifdef ENABLE_FPS_LIMIT
 220         while (frames*1000.0/((float)(SDL_GetTicks()-ft+1))>(float)(DEFAULT_FPS)) {
 221             SDL_Delay(10);
 222         }
 223         frames++;
 224 #endif
 225
 226         render(s, &r);
 227     }
 228
 229     for (p=1; p<=MAXPLAYERS; p++) {
 230         input_device_part_game(PLAYER(s, p).input);
 231     }
 232
 233     clear_screen();
 234     rectangle(0, 0, WIDTH, HEIGHT, 80, 80, 80);
 235     store_screen();
 236
 237     stop_sample(SOUND_AUDIENCE);
 238     stop_sample(SOUND_RAIN);
 239 }
 240
 241 bool step( GameState* s) {
 242     Uint8 *keys;
 243     bool ground_event = false;
 244     int p;
 245
 246     if (s->ball.z < 0) {
 247         /* ground event */
 248         ground_event = true;
 249
 250         s->referee = REFEREE_NORMAL;
 251
 252         /* bounce from the ground */
 253         if (fabsf(s->ball.move_z) > 0.3) {
 254             s->sound_events ^= SOUND_EVENT_GROUND;
 255             s->ball.move_z *= -s->ball.restitution;
 256         } else {
 257             s->ball.move_z = 0;
 258         }
 259         s->ball.z = 0;
 260     }
 261
 262     if (NET_COLLISION_BALL(s->ball)) {
 263         /* the net blocks movement of the ball */
 264         while (NET_COLLISION_BALL(s->ball)) {
 265             /* make sure the ball appears OUTSIDE of the net */
 266             if (s->ball.move_x < 0) {
 267                 s->ball.x += 1;
 268             } else {
 269                 s->ball.x -= 1;
 270             }
 271         }
 272         s->ball.move_x = 0;
 273         s->ball.move_y = 0;
 274     }
 275
 276     /* see if we have something to score */
 277     if (s->score_event == SCORE_UNDECIDED) {
 278         if (NET_COLLISION_BALL(s->ball)) {
 279             /* the ball "fell" into the net  */
 280             s->score_event = SCORE_EVENT_NET;
 281             s->sound_events ^= SOUND_EVENT_OUT;
 282             s->status_message = STATUSMSG_NET;
 283         } else if (IS_OFFSCREEN(s->ball.x, s->ball.y)) {
 284             /* ball flew offscreen */
 285             s->score_event = SCORE_EVENT_OFFSCREEN;
 286             s->sound_events ^= SOUND_EVENT_OUT;
 287             s->status_message = STATUSMSG_OUT;
 288         } else if (ground_event) {
 289             /* the ball hit the ground on the screen */
 290             if (IS_OUT(s->ball.x, s->ball.y)) {
 291                 /* the ball bounced in the OUT area */
 292                 s->score_event = SCORE_EVENT_OUT;
 293                 s->sound_events ^= SOUND_EVENT_OUT;
 294                 s->status_message = STATUSMSG_OUT;
 295             } else if (GROUND_IS_VALID(s->ball.last_hit_by, s->ball.x, s->ball.y)) {
 296                 if (s->ball.ground_hit) {
 297                     s->score_event = SCORE_EVENT_GROUND_VALID;
 298                     s->sound_events ^= SOUND_EVENT_OUT;
 299                     s->status_message = STATUSMSG_DIDNTCATCH;
 300                 } else {
 301                     /* first ground hit in valid area */
 302                     s->ball.ground_hit = true;
 303                 }
 304             } else {
 305                 /* ball hit somewhere invalid */
 306                 s->score_event = SCORE_EVENT_GROUND_INVALID;
 307                 s->sound_events ^= SOUND_EVENT_OUT;
 308                 s->status_message = STATUSMSG_FAULT;
 309             }
 310         }
 311     }
 312
 313     if (s->score_event != SCORE_UNDECIDED) {
 314         /* we have some scoring to do */
 315         if (s->score_time == 0) {
 316             /* schedule scoring in the future */
 317             s->score_time = s->time + SCORING_DELAY;
 318             s->referee = REFEREE_OUT;
 319         } else if (s->time >= s->score_time) {
 320             /* time has ran out - score now */
 321             switch (score_game(s)) {
 322                 case WINNER_PLAYER1:
 323                     s->status_message = STATUSMSG_P1SCORES;
 324                     s->referee = REFEREE_PLAYER1;
 325                     break;
 326                 case WINNER_PLAYER2:
 327                     s->status_message = STATUSMSG_P2SCORES;
 328                     s->referee = REFEREE_PLAYER2;
 329                     break;
 330                 default:
 331                     assert(0);
 332                     break;
 333             }
 334             s->score_time = 0;
 335
 336             game_setup_serve(s);
 337             if (s->location->max_visitors > 100) {
 338                 s->sound_events ^= SOUND_EVENT_APPLAUSE;
 339             }
 340         }
 341     } else {
 342         /* score is still undecided - do the racket swing thing */
 343         for (p=1; p<=2; p++) {
 344             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) {
 345                 /* RACKET HIT */
 346                 if (!s->ball.ground_hit && s->ball.move_x != 0.0) {
 347                     s->status_message = STATUSMSG_VOLLEY;
 348                 } else {
 349                     s->status_message = STATUSMSG_DEFAULT;
 350                 }
 351                 switch (PLAYER(s, p).desire) {
 352                     case DESIRE_NORMAL:
 353                         /* normal swing */
 354                         s->ball.move_x = 2.7 + 2.0*PLAYER(s, p).power/PLAYER_POWER_MAX;
 355                         s->ball.move_z = 1.2*PLAYER(s, p).power/PLAYER_POWER_MAX;
 356                         break;
 357                     case DESIRE_TOPSPIN:
 358                         /* top spin */
 359                         s->ball.move_x = 1.1 + 2.2*PLAYER(s, p).power/PLAYER_POWER_MAX;
 360                         s->ball.move_z = 2.5*PLAYER(s, p).power/PLAYER_POWER_MAX;
 361                         break;
 362                     case DESIRE_SMASH:
 363                         /* smash */
 364                         s->ball.move_x = 4.0 + 3.0*PLAYER(s, p).power/PLAYER_POWER_MAX;
 365                         s->ball.move_z = 1.1*PLAYER(s, p).power/PLAYER_POWER_MAX;
 366                         break;
 367                 }
 368                 s->ball.move_y = get_move_y( s, p);
 369                 s->sound_events ^= SOUND_EVENT_RACKET;
 370                 s->ball.ground_hit = false;
 371                 s->ball.inhibit_gravity = false;
 372                 s->ball.last_hit_by = p;
 373                 if (p==2) {
 374                     s->ball.move_x *= -1;
 375                 }
 376             }
 377         }
 378     }
 379
 380     SDL_PumpEvents();
 381     keys = SDL_GetKeyState(NULL);
 382
 383     if(s->winner == WINNER_NONE) {
 384         for (p=1; p<=MAXPLAYERS; p++) {
 385             if( PLAYER(s, p).type == PLAYER_TYPE_HUMAN) {
 386                 input_human(s, p);
 387             } else {
 388                 input_ai(s, p);
 389             }
 390         }
 391     }
 392
 393     /* Maemo: The "F6" button is the "Fullscreen" button */
 394     /*if( keys['f'] || keys[SDLK_F6]) SDL_WM_ToggleFullScreen( screen);*/
 395     if( keys['y']) SDL_SaveBMP( screen, "screenshot.bmp");
 396
 397     /* Maemo: The "F4" button is the "Open menu" button */
 398     if(keys[SDLK_ESCAPE] || keys['q']
 399             || keys['p'] || keys[SDLK_F4]) {
 400         return true;
 401     }
 402
 403     limit_value( &PLAYER(s, 1).y, PLAYER_Y_MIN, PLAYER_Y_MAX);
 404     limit_value( &PLAYER(s, 2).y, PLAYER_Y_MIN, PLAYER_Y_MAX);
 405
 406     s->ball.z += s->ball.move_z;
 407     if (!s->ball.inhibit_gravity) {
 408         s->ball.move_z += GRAVITY;
 409     }
 410
 411     s->ball.x += s->ball.move_x;
 412     s->ball.y += s->ball.move_y;
 413
 414     for (p=1; p<=MAXPLAYERS; p++) {
 415         if (PLAYER(s, p).use_power) {
 416             PLAYER(s, p).power = fmaxf(0.0, fminf(PLAYER(s, p).power*PLAYER(s, p).power_down_factor, PLAYER_POWER_MAX));
 417         }
 418     }
 419
 420     return false;
 421 }
 422
 423 void render(const GameState* s, RenderState* r) {
 424     int x, y, b;
 425     unsigned int i;
 426     float zoom;
 427     float rotate;
 428     int t=1000;
 429     soundevent_t sounds;
 430
 431     /* The bits in sound_events flip when the sound should play */
 432     if ((sounds = (r->sound_events ^ s->sound_events)) != 0) {
 433         if (sounds & SOUND_EVENT_GROUND) {
 434             sample_volume_group(SOUND_GROUND_FIRST, SOUND_GROUND_LAST,
 435                     fmaxf(0.0, fminf(1.0, fabsf(s->ball.move_z)/2)));
 436             pan_sample_group(SOUND_GROUND_FIRST, SOUND_GROUND_LAST,
 437                     fmaxf(0.0, fminf(1.0, (s->ball.x)/WIDTH)));
 438             play_sample(SOUND_GROUND);
 439         }
 440         if (sounds & SOUND_EVENT_OUT) {
 441             play_sample(SOUND_OUT);
 442         }
 443         if (sounds & SOUND_EVENT_APPLAUSE) {
 444             play_sample(SOUND_APPLAUSE);
 445         }
 446         if (sounds & SOUND_EVENT_RACKET) {
 447             if (((s->ball.x)/WIDTH) < 0.5) {
 448                 pan_sample_group(SOUND_RACKET_FIRST, SOUND_RACKET_LAST, 0.3);
 449             } else {
 450                 pan_sample_group(SOUND_RACKET_FIRST, SOUND_RACKET_LAST, 0.7);
 451             }
 452             play_sample(SOUND_RACKET);
 453         }
 454         r->sound_events = s->sound_events;
 455     }
 456
 457     if( s->winner != WINNER_NONE) {
 458         clear_screen();
 459         rectangle(0, 0, WIDTH, HEIGHT, 80, 80, 80);
 460         store_screen();
 461         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);
 462         /*sprintf( s->game_score_str, "player %d wins the match with %s", s->winner, format_sets( s));
 463         font_draw_string(FONT_LARGE, s->game_score_str, (WIDTH-font_get_string_width(FONT_LARGE, s->game_score_str))/2, HEIGHT/2 + 30);*/
 464         updatescr();
 465         return;
 466     }
 467     if ((r->referee != s->referee) ||
 468             (r->ec_game != s->ec_game) ||
 469             (r->ec_sets != s->ec_sets) ||
 470             (r->status_message != s->status_message)) {
 471         /* Update status message text */
 472         if (r->status_message != s->status_message) {
 473             r->text_status = format_status(s);
 474             r->status_message = s->status_message;
 475         }
 476         /* Update game status text */
 477         if (r->ec_game != s->ec_game) {
 478             r->text_game = format_game(s);
 479             r->ec_game = s->ec_game;
 480         }
 481         /* Update set status text */
 482         if (r->ec_sets != s->ec_sets) {
 483             r->text_sets = format_sets(s);
 484             if (r->status_message == STATUSMSG_DEFAULT) {
 485                 r->text_status = format_status(s);
 486             }
 487             r->ec_sets = s->ec_sets;
 488         }
 489         clear_screen();
 490         rectangle(0, 0, WIDTH, HEIGHT, 80, 80, 80);
 491         fill_image(s->location->court_type, 120, 120, 400, 250);
 492         show_image(GR_COURT, 0, 0, 255);
 493         font_draw_string(FONT_XLARGE, r->text_game, 14, 14);
 494         font_draw_string(FONT_XLARGE, r->text_sets,
 495                 (WIDTH-font_get_string_width(FONT_XLARGE, r->text_sets))-14, 14);
 496         if (s->location->has_referee) {
 497             switch (s->referee) {
 498                 case REFEREE_NORMAL:
 499                     t = 1000;
 500                     break;
 501                 case REFEREE_OUT:
 502                     t = 200;
 503                     break;
 504                 case REFEREE_PLAYER1:
 505                 case REFEREE_PLAYER2:
 506                     t = 400;
 507                     break;
 508             }
 509             t = (s->time/t)%4;
 510             switch (t) {
 511                 case 0:
 512                     t=0;
 513                     break;
 514                 case 1:
 515                     t=1;
 516                     break;
 517                 case 2:
 518                     t=0;
 519                     break;
 520                 case 3:
 521                     t=2;
 522                     break;
 523             }
 524             show_sprite( GR_REFEREE, s->referee*3+t, 12, 250, 10, 255);
 525             if (voice_finished_flag == 0) {
 526                 show_sprite(GR_TALK, (s->time/150)%2, 2, 280, 45, 255);
 527             }
 528         }
 529         r->referee = s->referee;
 530         store_screen();
 531     }
 532
 533    /* show_sprite( GR_RACKET, (!PLAYER(s, 1).state), 4, PLAYER(s, 1).x-RACKET_X_MID, PLAYER(s, 1).y-RACKET_Y_MID, 255);
 534     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);*/
 535     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);
 536     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);
 537
 538     rectangle(10, HEIGHT-30, PLAYER_POWER_MAX, 10, 50, 50, 50);
 539     rectangle(WIDTH-PLAYER_POWER_MAX-10, HEIGHT-30, PLAYER_POWER_MAX, 10, 50, 50, 50);
 540
 541     rectangle(10, HEIGHT-30, (int)(PLAYER(s, 1).power), 10, 200, 200, 200);
 542     rectangle(WIDTH-PLAYER_POWER_MAX-10, HEIGHT-30, (int)(PLAYER(s, 2).power), 10, 200, 200, 200);
 543
 544     if( s->ball.move_x > 0) {
 545         b = (s->time/100)%BALL_STATES;
 546     } else if( s->ball.move_x < 0) {
 547         b = BALL_STATES-1-(s->time/100)%BALL_STATES;
 548     } else {
 549         b = 0;
 550     }
 551
 552     rotate = 0.0;
 553     zoom = fmaxf(0.5, fminf(1.0, (float)(30.-(s->ball.z))/10.));
 554     show_image_rotozoom(GR_SHADOW, s->ball.x, s->ball.y+3, rotate, zoom);
 555
 556     rotate = (-s->ball.move_x * (float)((float)s->time/10.));
 557     zoom = 1.0 + fmaxf(0.0, (s->ball.z-10.)/100.);
 558     show_image_rotozoom(GR_BALL, s->ball.x, s->ball.y - s->ball.z, rotate, zoom);
 559
 560     /* Player 1's mouse rectangle */
 561     if (PLAYER(s, 1).input != NULL && PLAYER(s, 1).input->type == INPUT_TYPE_MOUSE) {
 562         rectangle(PLAYER(s, 1).x-2+5, PLAYER(s, 1).input->my-2, 4, 4, 255, 255, 255);
 563         rectangle(PLAYER(s, 1).x-1+5, PLAYER(s, 1).input->my-1, 2, 2, 0, 0, 0);
 564     }
 565
 566     /* Player 2's mouse rectangle */
 567     if (PLAYER(s, 2).input != NULL && PLAYER(s, 2).input->type == INPUT_TYPE_MOUSE) {
 568         rectangle(PLAYER(s, 2).x-2+5, PLAYER(s, 2).input->my-2, 4, 4, 255, 255, 255);
 569         rectangle(PLAYER(s, 2).x-1+5, PLAYER(s, 2).input->my-1, 2, 2, 0, 0, 0);
 570     }
 571
 572     font_draw_string(FONT_MEDIUM, r->text_status,
 573             (WIDTH-font_get_string_width(FONT_MEDIUM, r->text_status))/2, HEIGHT-50);
 574
 575     for (i=0; i<s->location->rain; i++) {
 576         x = rand()%WIDTH;
 577         y = rand()%HEIGHT;
 578         draw_line_faded(x, y, x+10, y+30, 0, 0, 255, 100, 200, 255);
 579     }
 580     if (s->location->rain) {
 581         /**
 582          * Cheap-ish update of the whole screen. This can
 583          * probably be optimized.
 584          **/
 585         update_rect(0, 0, WIDTH, HEIGHT);
 586     }
 587
 588 #ifdef DEBUG
 589     line_horiz( PLAYER(s, 1).y, 255, 0, 0);
 590     line_horiz( PLAYER(s, 2).y, 0, 0, 255);
 591     line_horiz( s->ball.y, 0, 255, 0);
 592
 593     line_vert( PLAYER(s, 1).x, 255, 0, 0);
 594     line_vert( PLAYER(s, 2).x, 0, 0, 255);
 595     line_vert( s->ball.x, 0, 255, 0);
 596
 597     line_horiz( GAME_Y_MIN, 100, 100, 100);
 598     line_horiz( GAME_Y_MAX, 100, 100, 100);
 599 #endif
 600     switch (s->location->fog) {
 601         default:
 602         case 4:
 603             fill_image_offset(GR_FOG2, 0, 0, WIDTH, HEIGHT, -s->time/150, 0);
 604         case 3:
 605             fill_image_offset(GR_FOG, 0, 0, WIDTH, HEIGHT, -s->time/100, 20);
 606         case 2:
 607             fill_image_offset(GR_FOG2, 0, 0, WIDTH, HEIGHT, -s->time/180, 80);
 608         case 1:
 609             fill_image_offset(GR_FOG, 0, 0, WIDTH, HEIGHT, s->time/200, 0);
 610         case 0:
 611             break;
 612     }
 613     if (s->location->night) {
 614         show_image(GR_NIGHT, 0, 0, 255);
 615     }
 616
 617     updatescr();
 618 }
 619
 620 void limit_value( float* value, float min, float max) {
 621     if( *value < min) {
 622         *value = min;
 623     } else if( *value > max) {
 624         *value = max;
 625     }
 626 }
 627
 628 float get_move_y( GameState* s, unsigned char player) {
 629     float pct, dest, x_len, y_len;
 630     float py, by, pa, move_x;
 631
 632     py = (player==1)?(PLAYER(s, 1).y):(PLAYER(s, 2).y);
 633     by = s->ball.y - s->ball.z;
 634     pa = RACKET_Y_MID*2;
 635     move_x = s->ball.move_x;
 636
 637     /* -1.0 .. 1.0 for racket hit position */
 638     pct = fmaxf(-1.0, fminf(1.0, (by-py)/(pa/2)));
 639
 640     /* Y destination for ball */
 641     dest = GAME_Y_MID + pct*(GAME_Y_MAX-GAME_Y_MIN);
 642
 643     /* lengths for the ball's journey */
 644     if( player == 1) {
 645         x_len = GAME_X_MAX - s->ball.x;
 646     } else {
 647         x_len = s->ball.x - GAME_X_MIN;
 648     }
 649     y_len = dest - by;
 650
 651     /* return the should-be value for move_y */
 652     return (y_len*move_x)/(x_len);
 653 }
 654
 655 void input_human(GameState* s, int player) {
 656     bool hit, topspin, smash;
 657     float move_y;
 658
 659     /* For mouse input, hand the player coordinates to the InputDevice */
 660     if (PLAYER(s, player).input->type == INPUT_TYPE_MOUSE) {
 661         PLAYER(s, player).input->player_x = (int)(PLAYER(s, player).x);
 662         PLAYER(s, player).input->player_y = (int)(PLAYER(s, player).y);
 663     }
 664
 665     move_y = PLAYER_MOVE_Y*input_device_get_axis(PLAYER(s, player).input, INPUT_AXIS_Y);
 666
 667     hit = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_HIT);
 668     topspin = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_TOPSPIN);
 669     smash = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_SMASH);
 670
 671     if (move_y != 0) {
 672         if (fabsf(move_y) > fabsf(move_y*PLAYER(s, player).accelerate)) {
 673             move_y *= PLAYER(s, player).accelerate;
 674         }
 675         PLAYER(s, player).y += move_y;
 676         PLAYER(s, player).accelerate *= PLAYER_ACCEL_INCREASE;
 677     } else {
 678         PLAYER(s, player).accelerate = PLAYER_ACCEL_DEFAULT;
 679     }
 680
 681     if(hit || topspin || smash) {
 682         PLAYER(s, player).desire = (topspin)?(DESIRE_TOPSPIN):(DESIRE_NORMAL);
 683         PLAYER(s, player).desire = (smash)?(DESIRE_SMASH):(PLAYER(s, player).desire);
 684
 685         PLAYER(s, player).power = fmaxf(10.0, fminf(PLAYER(s, player).power*PLAYER(s, player).power_up_factor, PLAYER_POWER_MAX));
 686         PLAYER(s, player).use_power = false;
 687     } else {
 688         PLAYER(s, player).use_power = true;
 689     }
 690 }
 691
 692 void input_ai(GameState* s, int player) {
 693     float fact = 1.7;
 694     int ball_approaching = 0;
 695
 696     if ((PLAYER(s, player).x < GAME_X_MID && s->ball.move_x <= 0) ||
 697         (PLAYER(s, player).x > GAME_X_MID && s->ball.move_x >= 0)) {
 698         ball_approaching = 1;
 699     }
 700
 701     /* FIXME - this is broken since the new physics model has been introduced */
 702
 703     if (fabsf(PLAYER(s, player).y - (s->ball.y-s->ball.z)) > RACKET_Y_MID*5) {
 704         fact = 3.5;
 705     }
 706
 707     if(1) {
 708         if( PLAYER(s, player).desire == DESIRE_NORMAL && !IS_NEAR_Y_AI(PLAYER(s, player).y, (s->ball.y-s->ball.z)) && ball_approaching) {
 709             if( PLAYER(s, player).y < (s->ball.y-s->ball.z)) {
 710                 PLAYER(s, player).y += fminf(2*fact, (s->ball.y-s->ball.z) - PLAYER(s, player).y);
 711             } else if( PLAYER(s, player).y > (s->ball.y-s->ball.z)) {
 712                 PLAYER(s, player).y -= fminf(2*fact, PLAYER(s, player).y - (s->ball.y-s->ball.z));
 713             }
 714         }
 715
 716         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.) {
 717             PLAYER(s, player).use_power = true;
 718         } else if (ball_approaching) {
 719             PLAYER(s, player).power = fmaxf(10., fminf(PLAYER(s, player).power*PLAYER(s, player).power_up_factor, PLAYER_POWER_MAX));
 720             PLAYER(s, player).use_power = false;
 721         }
 722     }
 723 }
 724
 725 void game_setup_serve( GameState* s) {
 726     s->ball.z = 10.0;
 727     s->ball.y = GAME_Y_MID;
 728     s->ball.move_x = 0.0;
 729     s->ball.move_y = 0.0;
 730     s->ball.move_z = 0.0;
 731     s->ball.last_hit_by = -1;
 732     s->ball.inhibit_gravity = true;
 733
 734     if( s->serving_player == 1) {
 735         s->ball.x = GAME_X_MIN-RACKET_X_MID*1.5;
 736     } else {
 737         s->ball.x = GAME_X_MAX+RACKET_X_MID*1.5;
 738     }
 739 }
 740
 741 int score_game(GameState* s) {
 742     Player *last_hit_by = NULL;
 743     Player *other = NULL;
 744
 745     Player* winner = NULL;
 746     Player* loser = NULL;
 747
 748     /* determine "last hit by" and "other" */
 749     if (s->ball.last_hit_by == 1) {
 750         last_hit_by = &(PLAYER(s, 1));
 751         other = &(PLAYER(s, 2));
 752     } else {
 753         last_hit_by = &(PLAYER(s, 2));
 754         other = &(PLAYER(s, 1));
 755     }
 756
 757     switch (s->score_event) {
 758         case SCORE_EVENT_NET:
 759             winner = other;
 760             break;
 761         case SCORE_EVENT_OUT:
 762         case SCORE_EVENT_GROUND_INVALID:
 763         case SCORE_EVENT_OFFSCREEN:
 764         case SCORE_EVENT_GROUND_VALID:
 765             if (s->ball.ground_hit) {
 766                 winner = last_hit_by;
 767             } else {
 768                 winner = other;
 769             }
 770             break;
 771         default:
 772             break;
 773     }
 774
 775     /* determine loser based on winner */
 776     if (winner == last_hit_by) {
 777         loser = other;
 778     } else {
 779         loser = last_hit_by;
 780     }
 781
 782     /* we cannot be in an "impossibly high" set */
 783     assert(s->current_set < SETS_TO_WIN*2-1);
 784
 785     winner->game++;
 786     s->ec_game++;
 787     if( loser->game < winner->game-1) {
 788         if( winner->game >= 4) {
 789             winner->game = loser->game = 0;
 790             winner->sets[s->current_set]++;
 791             s->ec_sets++;
 792
 793             /* serving is changed when the "game" is over */
 794             s->serving_player = (s->serving_player==1)?(2):(1);
 795
 796 #ifdef HAVE_VOICE_FILES
 797             /* speak the current score */
 798             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);
 799 #endif
 800
 801             /* scoring the set.. */
 802             if( (winner->sets[s->current_set] == 6 && loser->sets[s->current_set] < 5) ||
 803                 winner->sets[s->current_set] == 7) {
 804                 s->current_set++;
 805                 s->winner = game_get_winner( s);
 806             }
 807         }
 808     }
 809
 810     /* forget this event - we've handled it */
 811     s->score_event = SCORE_UNDECIDED;
 812
 813     if (winner == &PLAYER(s, 1)) {
 814         return WINNER_PLAYER1;
 815     } else {
 816         return WINNER_PLAYER2;
 817     }
 818 }
 819
 820 const char* format_sets(const GameState* s) {
 821     static char sets[100];
 822     static char tmp[100];
 823     int i, max = s->current_set;
 824
 825     sets[0] = '\0';
 826
 827     if( s->winner != WINNER_NONE) {
 828         max--;
 829     }
 830     for( i=0; i<=max; i++) {
 831         sprintf( tmp, "%d:%d, ", PLAYER(s, 1).sets[i], PLAYER(s, 2).sets[i]);
 832         strcat( sets, tmp);
 833     }
 834
 835     sets[strlen(sets)-2] = '\0';
 836
 837     return sets;
 838 }
 839
 840 const char* format_game(const GameState* s) {
 841     static char game[100];
 842     static const int game_scoring[] = { 0, 15, 30, 40 };
 843
 844     if( PLAYER(s, 1).game < 4 && PLAYER(s, 2).game < 4) {
 845 #ifdef HAVE_VOICE_FILES
 846         if (PLAYER(s, 1).game > 0 || PLAYER(s, 2).game > 0) {
 847             if (PLAYER(s, 1).game == PLAYER(s, 2).game) {
 848                 voice_say_list(2, VOICE_LOVE_IN + 2*(PLAYER(s, 1).game), VOICE_ALL);
 849             } else {
 850                 voice_say_list(2, VOICE_LOVE_IN + 2*(PLAYER(s, 1).game), VOICE_LOVE_OUT + 2*(PLAYER(s, 2).game));
 851             }
 852         }
 853 #endif
 854         sprintf( game, "%d - %d", game_scoring[PLAYER(s, 1).game], game_scoring[PLAYER(s, 2).game]);
 855     } else if( PLAYER(s, 1).game > PLAYER(s, 2).game) {
 856 #ifdef HAVE_VOICE_FILES
 857         voice_say_list(1, VOICE_ADVANTAGE_PLAYER_ONE);
 858 #endif
 859         strcpy( game, "advantage player 1");
 860     } else if( PLAYER(s, 1).game < PLAYER(s, 2).game) {
 861 #ifdef HAVE_VOICE_FILES
 862         voice_say_list(1, VOICE_ADVANTAGE_PLAYER_TWO);
 863 #endif
 864         strcpy( game, "advantage player 2");
 865     } else {
 866 #ifdef HAVE_VOICE_FILES
 867         voice_say_list(1, VOICE_DEUCE);
 868 #endif
 869         strcpy( game, "deuce");
 870     }
 871
 872     return game;
 873 }
 874
 875 const char* format_status(const GameState* s) {
 876     static char status[100];
 877     static const char* set_names[] = { "first", "second", "third", "fourth", "fifth" };
 878
 879     switch (s->status_message) {
 880         case STATUSMSG_NONE:
 881             return "";
 882         case STATUSMSG_WELCOME:
 883             return "welcome to tennix " VERSION;
 884         case STATUSMSG_DEFAULT:
 885             sprintf(status, "%d:%d in %s set",
 886                     PLAYER(s, 1).sets[s->current_set],
 887                     PLAYER(s, 2).sets[s->current_set],
 888                     set_names[s->current_set]);
 889             return status;
 890         case STATUSMSG_NET:
 891             return "net!";
 892         case STATUSMSG_OUT:
 893             return "out!";
 894         case STATUSMSG_FAULT:
 895             return "fault!";
 896         case STATUSMSG_P1SCORES:
 897             return "player 1 scores.";
 898         case STATUSMSG_P2SCORES:
 899             return "player 2 scores.";
 900         case STATUSMSG_VOLLEY:
 901             return "volley!";
 902         case STATUSMSG_DIDNTCATCH:
 903             return "did not catch the ball.";
 904         default:
 905             return "";
 906     }
 907 }
 908
 909 int game_get_winner( GameState* s) {
 910     unsigned int i;
 911     int sets[2] = {0};
 912
 913     for( i=0; i<s->current_set; i++) {
 914         if( PLAYER(s, 1).sets[i] > PLAYER(s, 2).sets[i]) {
 915             sets[0]++;
 916         } else {
 917             sets[1]++;
 918         }
 919     }
 920
 921     if( sets[0] == SETS_TO_WIN) return WINNER_PLAYER1;
 922     if( sets[1] == SETS_TO_WIN) return WINNER_PLAYER2;
 923
 924     return WINNER_NONE;
 925 }
 926