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 #include "network.h"
  37
  38
  39 GameState *gamestate_new() {
  40     GameState *s;
  41
  42     GameState template = {
  43         NULL,
  44         -1,
  45         { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, false, -1, false },
  46         {
  47             { NULL, -1, GAME_X_MIN-RACKET_X_MID*2, GAME_Y_MID, 0.0, true, 0, DESIRE_NORMAL, PLAYER_TYPE_AI, 0, {0}, PLAYER_ACCEL_DEFAULT },
  48             { NULL, -1, GAME_X_MAX+RACKET_X_MID*2, GAME_Y_MID, 0.0, true, 0, DESIRE_NORMAL, PLAYER_TYPE_AI, 0, {0}, PLAYER_ACCEL_DEFAULT },
  49         },
  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     const 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             step(s);
 215             quit = handle_input(s);
 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 void step(GameState* s) {
 242     bool ground_event = false;
 243     int p;
 244     fprintf(stderr, "ball(%f, %f, %f, %f, %f, %f)\n",
 245             s->ball.x, s->ball.y, s->ball.z,
 246             s->ball.move_x, s->ball.move_y, s->ball.move_z);
 247
 248     s->ball.z += s->ball.move_z;
 249     if (!s->ball.inhibit_gravity) {
 250         s->ball.move_z += GRAVITY;
 251     }
 252
 253     s->ball.x += s->ball.move_x;
 254     s->ball.y += s->ball.move_y;
 255
 256     for (p=1; p<=MAXPLAYERS; p++) {
 257         if (PLAYER(s, p).use_power) {
 258             PLAYER(s, p).power = fmaxf(0.0, fminf(
 259                         PLAYER(s, p).power*POWER_DOWN_FACTOR,
 260                         PLAYER_POWER_MAX));
 261         }
 262     }
 263
 264     if (s->ball.z < 0) {
 265         /* ground event */
 266         ground_event = true;
 267
 268         s->referee = REFEREE_NORMAL;
 269
 270         /* bounce from the ground */
 271         if (fabsf(s->ball.move_z) > 0.3) {
 272             s->sound_events ^= SOUND_EVENT_GROUND;
 273             s->ball.move_z *= -BALL_RESTITUTION;
 274         } else {
 275             s->ball.move_z = 0;
 276         }
 277         s->ball.z = 0;
 278     }
 279
 280     if (NET_COLLISION_BALL(s->ball)) {
 281         /* the net blocks movement of the ball */
 282         while (NET_COLLISION_BALL(s->ball)) {
 283             /* make sure the ball appears OUTSIDE of the net */
 284             if (s->ball.move_x < 0) {
 285                 s->ball.x += 1;
 286             } else {
 287                 s->ball.x -= 1;
 288             }
 289         }
 290         s->ball.move_x = 0;
 291         s->ball.move_y = 0;
 292     }
 293
 294     /* see if we have something to score */
 295     if (s->score_event == SCORE_UNDECIDED) {
 296         if (NET_COLLISION_BALL(s->ball)) {
 297             /* the ball "fell" into the net  */
 298             s->score_event = SCORE_EVENT_NET;
 299             s->sound_events ^= SOUND_EVENT_OUT;
 300             s->status_message = STATUSMSG_NET;
 301         } else if (IS_OFFSCREEN(s->ball.x, s->ball.y)) {
 302             /* ball flew offscreen */
 303             s->score_event = SCORE_EVENT_OFFSCREEN;
 304             s->sound_events ^= SOUND_EVENT_OUT;
 305             s->status_message = STATUSMSG_OUT;
 306         } else if (ground_event) {
 307             /* the ball hit the ground on the screen */
 308             if (IS_OUT(s->ball.x, s->ball.y)) {
 309                 /* the ball bounced in the OUT area */
 310                 s->score_event = SCORE_EVENT_OUT;
 311                 s->sound_events ^= SOUND_EVENT_OUT;
 312                 s->status_message = STATUSMSG_OUT;
 313             } else if (GROUND_IS_VALID(s->ball.last_hit_by, s->ball.x, s->ball.y)) {
 314                 if (s->ball.ground_hit) {
 315                     s->score_event = SCORE_EVENT_GROUND_VALID;
 316                     s->sound_events ^= SOUND_EVENT_OUT;
 317                     s->status_message = STATUSMSG_DIDNTCATCH;
 318                 } else {
 319                     /* first ground hit in valid area */
 320                     s->ball.ground_hit = true;
 321                 }
 322             } else {
 323                 /* ball hit somewhere invalid */
 324                 s->score_event = SCORE_EVENT_GROUND_INVALID;
 325                 s->sound_events ^= SOUND_EVENT_OUT;
 326                 s->status_message = STATUSMSG_FAULT;
 327             }
 328         }
 329     }
 330
 331     if (s->score_event != SCORE_UNDECIDED) {
 332         /* we have some scoring to do */
 333         if (s->score_time < SCORING_DELAY/GAME_TICKS) {
 334             /* schedule scoring in the future */
 335             s->score_time++;
 336             s->referee = REFEREE_OUT;
 337         } else if (s->score_time >= SCORING_DELAY/GAME_TICKS) {
 338             /* time has ran out - score now */
 339             switch (score_game(s)) {
 340                 case WINNER_PLAYER1:
 341                     s->status_message = STATUSMSG_P1SCORES;
 342                     s->referee = REFEREE_PLAYER1;
 343                     break;
 344                 case WINNER_PLAYER2:
 345                     s->status_message = STATUSMSG_P2SCORES;
 346                     s->referee = REFEREE_PLAYER2;
 347                     break;
 348                 default:
 349                     assert(0);
 350                     break;
 351             }
 352             s->score_time = 0;
 353
 354             game_setup_serve(s);
 355             if (s->location->max_visitors > 100) {
 356                 s->sound_events ^= SOUND_EVENT_APPLAUSE;
 357             }
 358         }
 359     } else {
 360         /* score is still undecided - do the racket swing thing */
 361         for (p=1; p<=2; p++) {
 362             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) {
 363                 /* RACKET HIT */
 364                 if (!s->ball.ground_hit && s->ball.move_x != 0.0) {
 365                     s->status_message = STATUSMSG_VOLLEY;
 366                 } else {
 367                     s->status_message = STATUSMSG_DEFAULT;
 368                 }
 369                 switch (PLAYER(s, p).desire) {
 370                     case DESIRE_NORMAL:
 371                         /* normal swing */
 372                         s->ball.move_x = 2.7 + 2.0*PLAYER(s, p).power/PLAYER_POWER_MAX;
 373                         s->ball.move_z = 1.2*PLAYER(s, p).power/PLAYER_POWER_MAX;
 374                         break;
 375                     case DESIRE_TOPSPIN:
 376                         /* top spin */
 377                         s->ball.move_x = 1.1 + 2.2*PLAYER(s, p).power/PLAYER_POWER_MAX;
 378                         s->ball.move_z = 2.5*PLAYER(s, p).power/PLAYER_POWER_MAX;
 379                         break;
 380                     case DESIRE_SMASH:
 381                         /* smash */
 382                         s->ball.move_x = 4.0 + 3.0*PLAYER(s, p).power/PLAYER_POWER_MAX;
 383                         s->ball.move_z = 1.1*PLAYER(s, p).power/PLAYER_POWER_MAX;
 384                         break;
 385                 }
 386                 s->ball.move_y = get_move_y( s, p);
 387                 s->sound_events ^= SOUND_EVENT_RACKET;
 388                 s->ball.ground_hit = false;
 389                 s->ball.inhibit_gravity = false;
 390                 s->ball.last_hit_by = p;
 391                 if (p==2) {
 392                     s->ball.move_x *= -1;
 393                 }
 394             }
 395         }
 396     }
 397 }
 398
 399 bool handle_input(GameState* s) {
 400     static NetworkGameState tmp;
 401     Uint8* keys = NULL;
 402     int p;
 403
 404     SDL_PumpEvents();
 405     keys = SDL_GetKeyState(NULL);
 406
 407     if (keys['1']) {
 408         net_serialize_gamestate(s, &tmp);
 409     } else if (keys['2']) {
 410         net_unserialize_gamestate(&tmp, s);
 411     }
 412
 413     if (s->winner == WINNER_NONE) {
 414         for (p=1; p<=MAXPLAYERS; p++) {
 415             if( PLAYER(s, p).type == PLAYER_TYPE_HUMAN) {
 416                 input_human(s, p);
 417             } else {
 418                 input_ai(s, p);
 419             }
 420
 421             /* Make sure player coordinates are valid */
 422             if (PLAYER(s, p).y < PLAYER_Y_MIN) {
 423                 PLAYER(s, p).y = PLAYER_Y_MIN;
 424             } else if (PLAYER(s, p).y > PLAYER_Y_MAX) {
 425                 PLAYER(s, p).y = PLAYER_Y_MAX;
 426             }
 427         }
 428     }
 429
 430     /* Maemo: The "F4" button is the "Open menu" button */
 431     return (keys[SDLK_ESCAPE] || keys['q']);
 432 }
 433
 434 void render(const GameState* s, RenderState* r) {
 435     int x, y, b;
 436     unsigned int i;
 437     float zoom;
 438     float rotate;
 439     int t=1000;
 440     soundevent_t sounds;
 441     Uint32 time = SDL_GetTicks();
 442
 443     /* The bits in sound_events flip when the sound should play */
 444     if ((sounds = (r->sound_events ^ s->sound_events)) != 0) {
 445         if (sounds & SOUND_EVENT_GROUND) {
 446             sample_volume_group(SOUND_GROUND_FIRST, SOUND_GROUND_LAST,
 447                     fmaxf(0.0, fminf(1.0, fabsf(s->ball.move_z)/2)));
 448             pan_sample_group(SOUND_GROUND_FIRST, SOUND_GROUND_LAST,
 449                     fmaxf(0.0, fminf(1.0, (s->ball.x)/WIDTH)));
 450             play_sample(SOUND_GROUND);
 451         }
 452         if (sounds & SOUND_EVENT_OUT) {
 453             play_sample(SOUND_OUT);
 454         }
 455         if (sounds & SOUND_EVENT_APPLAUSE) {
 456             play_sample(SOUND_APPLAUSE);
 457         }
 458         if (sounds & SOUND_EVENT_RACKET) {
 459             if (((s->ball.x)/WIDTH) < 0.5) {
 460                 pan_sample_group(SOUND_RACKET_FIRST, SOUND_RACKET_LAST, 0.3);
 461             } else {
 462                 pan_sample_group(SOUND_RACKET_FIRST, SOUND_RACKET_LAST, 0.7);
 463             }
 464             play_sample(SOUND_RACKET);
 465         }
 466         r->sound_events = s->sound_events;
 467     }
 468
 469     if( s->winner != WINNER_NONE) {
 470         clear_screen();
 471         rectangle(0, 0, WIDTH, HEIGHT, 80, 80, 80);
 472         store_screen();
 473         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);
 474         /*sprintf( s->game_score_str, "player %d wins the match with %s", s->winner, format_sets( s));
 475         font_draw_string(FONT_LARGE, s->game_score_str, (WIDTH-font_get_string_width(FONT_LARGE, s->game_score_str))/2, HEIGHT/2 + 30);*/
 476         updatescr();
 477         return;
 478     }
 479     if ((r->referee != s->referee) ||
 480             (r->ec_game != s->ec_game) ||
 481             (r->ec_sets != s->ec_sets) ||
 482             (r->status_message != s->status_message)) {
 483         /* Update status message text */
 484         if (r->status_message != s->status_message) {
 485             r->text_status = format_status(s);
 486             r->status_message = s->status_message;
 487         }
 488         /* Update game status text */
 489         if (r->ec_game != s->ec_game) {
 490             r->text_game = format_game(s);
 491             r->ec_game = s->ec_game;
 492         }
 493         /* Update set status text */
 494         if (r->ec_sets != s->ec_sets) {
 495             r->text_sets = format_sets(s);
 496             if (r->status_message == STATUSMSG_DEFAULT) {
 497                 r->text_status = format_status(s);
 498             }
 499             r->ec_sets = s->ec_sets;
 500         }
 501         clear_screen();
 502         rectangle(0, 0, WIDTH, HEIGHT, 80, 80, 80);
 503         fill_image(s->location->court_type, 120, 120, 400, 250);
 504         show_image(GR_COURT, 0, 0, 255);
 505         font_draw_string(FONT_XLARGE, r->text_game, 14, 14);
 506         font_draw_string(FONT_XLARGE, r->text_sets,
 507                 (WIDTH-font_get_string_width(FONT_XLARGE, r->text_sets))-14, 14);
 508         if (s->location->has_referee) {
 509             switch (s->referee) {
 510                 case REFEREE_NORMAL:
 511                     t = 1000;
 512                     break;
 513                 case REFEREE_OUT:
 514                     t = 200;
 515                     break;
 516                 case REFEREE_PLAYER1:
 517                 case REFEREE_PLAYER2:
 518                     t = 400;
 519                     break;
 520             }
 521             t = (time/t)%4;
 522             switch (t) {
 523                 case 0:
 524                     t=0;
 525                     break;
 526                 case 1:
 527                     t=1;
 528                     break;
 529                 case 2:
 530                     t=0;
 531                     break;
 532                 case 3:
 533                     t=2;
 534                     break;
 535             }
 536             show_sprite( GR_REFEREE, s->referee*3+t, 12, 250, 10, 255);
 537             if (voice_finished_flag == 0) {
 538                 show_sprite(GR_TALK, (time/150)%2, 2, 280, 45, 255);
 539             }
 540         }
 541         r->referee = s->referee;
 542         store_screen();
 543     }
 544
 545    /* show_sprite( GR_RACKET, (!PLAYER(s, 1).state), 4, PLAYER(s, 1).x-RACKET_X_MID, PLAYER(s, 1).y-RACKET_Y_MID, 255);
 546     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);*/
 547     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);
 548     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);
 549
 550     rectangle(10, HEIGHT-30, PLAYER_POWER_MAX, 10, 50, 50, 50);
 551     rectangle(WIDTH-PLAYER_POWER_MAX-10, HEIGHT-30, PLAYER_POWER_MAX, 10, 50, 50, 50);
 552
 553     rectangle(10, HEIGHT-30, (int)(PLAYER(s, 1).power), 10, 200, 200, 200);
 554     rectangle(WIDTH-PLAYER_POWER_MAX-10, HEIGHT-30, (int)(PLAYER(s, 2).power), 10, 200, 200, 200);
 555
 556     if( s->ball.move_x > 0) {
 557         b = (time/100)%BALL_STATES;
 558     } else if( s->ball.move_x < 0) {
 559         b = BALL_STATES-1-(time/100)%BALL_STATES;
 560     } else {
 561         b = 0;
 562     }
 563
 564     rotate = 0.0;
 565     zoom = fmaxf(0.5, fminf(1.0, (float)(30.-(s->ball.z))/10.));
 566     show_image_rotozoom(GR_SHADOW, s->ball.x, s->ball.y+3, rotate, zoom);
 567
 568     rotate = (-s->ball.move_x * (float)((float)time/10.));
 569     zoom = 1.0 + fmaxf(0.0, (s->ball.z-10.)/100.);
 570     show_image_rotozoom(GR_BALL, s->ball.x, s->ball.y - s->ball.z, rotate, zoom);
 571
 572     /* Player 1's mouse rectangle */
 573     if (PLAYER(s, 1).input != NULL && PLAYER(s, 1).input->type == INPUT_TYPE_MOUSE) {
 574         rectangle(PLAYER(s, 1).x-2+5, PLAYER(s, 1).input->my-2, 4, 4, 255, 255, 255);
 575         rectangle(PLAYER(s, 1).x-1+5, PLAYER(s, 1).input->my-1, 2, 2, 0, 0, 0);
 576     }
 577
 578     /* Player 2's mouse rectangle */
 579     if (PLAYER(s, 2).input != NULL && PLAYER(s, 2).input->type == INPUT_TYPE_MOUSE) {
 580         rectangle(PLAYER(s, 2).x-2+5, PLAYER(s, 2).input->my-2, 4, 4, 255, 255, 255);
 581         rectangle(PLAYER(s, 2).x-1+5, PLAYER(s, 2).input->my-1, 2, 2, 0, 0, 0);
 582     }
 583
 584     font_draw_string(FONT_MEDIUM, r->text_status,
 585             (WIDTH-font_get_string_width(FONT_MEDIUM, r->text_status))/2, HEIGHT-50);
 586
 587     for (i=0; i<s->location->rain; i++) {
 588         x = rand()%WIDTH;
 589         y = rand()%HEIGHT;
 590         draw_line_faded(x, y, x+10, y+30, 0, 0, 255, 100, 200, 255);
 591     }
 592     if (s->location->rain) {
 593         /**
 594          * Cheap-ish update of the whole screen. This can
 595          * probably be optimized.
 596          **/
 597         update_rect(0, 0, WIDTH, HEIGHT);
 598     }
 599
 600 #ifdef DEBUG
 601     line_horiz( PLAYER(s, 1).y, 255, 0, 0);
 602     line_horiz( PLAYER(s, 2).y, 0, 0, 255);
 603     line_horiz( s->ball.y, 0, 255, 0);
 604
 605     line_vert( PLAYER(s, 1).x, 255, 0, 0);
 606     line_vert( PLAYER(s, 2).x, 0, 0, 255);
 607     line_vert( s->ball.x, 0, 255, 0);
 608
 609     line_horiz( GAME_Y_MIN, 100, 100, 100);
 610     line_horiz( GAME_Y_MAX, 100, 100, 100);
 611 #endif
 612     switch (s->location->fog) {
 613         default:
 614         case 4:
 615             fill_image_offset(GR_FOG2, 0, 0, WIDTH, HEIGHT, -time/150, 0);
 616         case 3:
 617             fill_image_offset(GR_FOG, 0, 0, WIDTH, HEIGHT, -time/100, 20);
 618         case 2:
 619             fill_image_offset(GR_FOG2, 0, 0, WIDTH, HEIGHT, -time/180, 80);
 620         case 1:
 621             fill_image_offset(GR_FOG, 0, 0, WIDTH, HEIGHT, time/200, 0);
 622         case 0:
 623             break;
 624     }
 625     if (s->location->night) {
 626         show_image(GR_NIGHT, 0, 0, 255);
 627     }
 628
 629     updatescr();
 630 }
 631
 632 float get_move_y( GameState* s, unsigned char player) {
 633     float pct, dest, x_len, y_len;
 634     float py, by, pa, move_x;
 635
 636     py = (player==1)?(PLAYER(s, 1).y):(PLAYER(s, 2).y);
 637     by = s->ball.y - s->ball.z;
 638     pa = RACKET_Y_MID*2;
 639     move_x = s->ball.move_x;
 640
 641     /* -1.0 .. 1.0 for racket hit position */
 642     pct = fmaxf(-1.0, fminf(1.0, (by-py)/(pa/2)));
 643
 644     /* Y destination for ball */
 645     dest = GAME_Y_MID + pct*(GAME_Y_MAX-GAME_Y_MIN);
 646
 647     /* lengths for the ball's journey */
 648     if( player == 1) {
 649         x_len = GAME_X_MAX - s->ball.x;
 650     } else {
 651         x_len = s->ball.x - GAME_X_MIN;
 652     }
 653     y_len = dest - by;
 654
 655     /* return the should-be value for move_y */
 656     return (y_len*move_x)/(x_len);
 657 }
 658
 659 void input_human(GameState* s, int player) {
 660     bool hit, topspin, smash;
 661     float move_y;
 662
 663     /* For mouse input, hand the player coordinates to the InputDevice */
 664     if (PLAYER(s, player).input->type == INPUT_TYPE_MOUSE) {
 665         PLAYER(s, player).input->player_x = (int)(PLAYER(s, player).x);
 666         PLAYER(s, player).input->player_y = (int)(PLAYER(s, player).y);
 667     }
 668
 669     move_y = PLAYER_MOVE_Y*input_device_get_axis(PLAYER(s, player).input, INPUT_AXIS_Y);
 670
 671     hit = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_HIT);
 672     topspin = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_TOPSPIN);
 673     smash = input_device_get_key(PLAYER(s, player).input, INPUT_KEY_SMASH);
 674
 675     if (move_y != 0) {
 676         if (fabsf(move_y) > fabsf(move_y*PLAYER(s, player).accelerate)) {
 677             move_y *= PLAYER(s, player).accelerate;
 678         }
 679         PLAYER(s, player).y += move_y;
 680         PLAYER(s, player).accelerate *= PLAYER_ACCEL_INCREASE;
 681     } else {
 682         PLAYER(s, player).accelerate = PLAYER_ACCEL_DEFAULT;
 683     }
 684
 685     if(hit || topspin || smash) {
 686         PLAYER(s, player).desire = (topspin)?(DESIRE_TOPSPIN):(DESIRE_NORMAL);
 687         PLAYER(s, player).desire = (smash)?(DESIRE_SMASH):(PLAYER(s, player).desire);
 688
 689         PLAYER(s, player).power = fmaxf(10.0, fminf(PLAYER(s, player).power*POWER_UP_FACTOR, PLAYER_POWER_MAX));
 690         PLAYER(s, player).use_power = false;
 691     } else {
 692         PLAYER(s, player).use_power = true;
 693     }
 694 }
 695
 696 void input_ai(GameState* s, int player) {
 697     float fact = 1.7;
 698     int ball_approaching = 0;
 699
 700     if ((PLAYER(s, player).x < GAME_X_MID && s->ball.move_x <= 0) ||
 701         (PLAYER(s, player).x > GAME_X_MID && s->ball.move_x >= 0)) {
 702         ball_approaching = 1;
 703     }
 704
 705     /* FIXME - this is broken since the new physics model has been introduced */
 706
 707     if (fabsf(PLAYER(s, player).y - (s->ball.y-s->ball.z)) > RACKET_Y_MID*5) {
 708         fact = 3.5;
 709     }
 710
 711     if(1) {
 712         if( PLAYER(s, player).desire == DESIRE_NORMAL && !IS_NEAR_Y_AI(PLAYER(s, player).y, (s->ball.y-s->ball.z)) && ball_approaching) {
 713             if( PLAYER(s, player).y < (s->ball.y-s->ball.z)) {
 714                 PLAYER(s, player).y += fminf(2*fact, (s->ball.y-s->ball.z) - PLAYER(s, player).y);
 715             } else if( PLAYER(s, player).y > (s->ball.y-s->ball.z)) {
 716                 PLAYER(s, player).y -= fminf(2*fact, PLAYER(s, player).y - (s->ball.y-s->ball.z));
 717             }
 718         }
 719
 720         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.) {
 721             PLAYER(s, player).use_power = true;
 722         } else if (ball_approaching) {
 723             PLAYER(s, player).power = fmaxf(10., fminf(PLAYER(s, player).power*POWER_UP_FACTOR, PLAYER_POWER_MAX));
 724             PLAYER(s, player).use_power = false;
 725         }
 726     }
 727 }
 728
 729 void game_setup_serve( GameState* s) {
 730     s->ball.z = 10.0;
 731     s->ball.y = GAME_Y_MID;
 732     s->ball.move_x = 0.0;
 733     s->ball.move_y = 0.0;
 734     s->ball.move_z = 0.0;
 735     s->ball.last_hit_by = -1;
 736     s->ball.inhibit_gravity = true;
 737
 738     if( s->serving_player == 1) {
 739         s->ball.x = GAME_X_MIN-RACKET_X_MID*1.5;
 740     } else {
 741         s->ball.x = GAME_X_MAX+RACKET_X_MID*1.5;
 742     }
 743 }
 744
 745 int score_game(GameState* s) {
 746     Player *last_hit_by = NULL;
 747     Player *other = NULL;
 748
 749     Player* winner = NULL;
 750     Player* loser = NULL;
 751
 752     /* determine "last hit by" and "other" */
 753     if (s->ball.last_hit_by == 1) {
 754         last_hit_by = &(PLAYER(s, 1));
 755         other = &(PLAYER(s, 2));
 756     } else {
 757         last_hit_by = &(PLAYER(s, 2));
 758         other = &(PLAYER(s, 1));
 759     }
 760
 761     switch (s->score_event) {
 762         case SCORE_EVENT_NET:
 763             winner = other;
 764             break;
 765         case SCORE_EVENT_OUT:
 766         case SCORE_EVENT_GROUND_INVALID:
 767         case SCORE_EVENT_OFFSCREEN:
 768         case SCORE_EVENT_GROUND_VALID:
 769             if (s->ball.ground_hit) {
 770                 winner = last_hit_by;
 771             } else {
 772                 winner = other;
 773             }
 774             break;
 775         default:
 776             break;
 777     }
 778
 779     /* determine loser based on winner */
 780     if (winner == last_hit_by) {
 781         loser = other;
 782     } else {
 783         loser = last_hit_by;
 784     }
 785
 786     /* we cannot be in an "impossibly high" set */
 787     assert(s->current_set < SETS_TO_WIN*2-1);
 788
 789     winner->game++;
 790     s->ec_game++;
 791     if( loser->game < winner->game-1) {
 792         if( winner->game >= 4) {
 793             winner->game = loser->game = 0;
 794             winner->sets[s->current_set]++;
 795             s->ec_sets++;
 796
 797             /* serving is changed when the "game" is over */
 798             s->serving_player = (s->serving_player==1)?(2):(1);
 799
 800 #ifdef HAVE_VOICE_FILES
 801             /* speak the current score */
 802             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);
 803 #endif
 804
 805             /* scoring the set.. */
 806             if( (winner->sets[s->current_set] == 6 && loser->sets[s->current_set] < 5) ||
 807                 winner->sets[s->current_set] == 7) {
 808                 s->current_set++;
 809                 s->winner = game_get_winner( s);
 810             }
 811         }
 812     }
 813
 814     /* forget this event - we've handled it */
 815     s->score_event = SCORE_UNDECIDED;
 816
 817     if (winner == &PLAYER(s, 1)) {
 818         return WINNER_PLAYER1;
 819     } else {
 820         return WINNER_PLAYER2;
 821     }
 822 }
 823
 824 const char* format_sets(const GameState* s) {
 825     static char sets[100];
 826     static char tmp[100];
 827     int i, max = s->current_set;
 828
 829     sets[0] = '\0';
 830
 831     if( s->winner != WINNER_NONE) {
 832         max--;
 833     }
 834     for( i=0; i<=max; i++) {
 835         sprintf( tmp, "%d:%d, ", PLAYER(s, 1).sets[i], PLAYER(s, 2).sets[i]);
 836         strcat( sets, tmp);
 837     }
 838
 839     sets[strlen(sets)-2] = '\0';
 840
 841     return sets;
 842 }
 843
 844 const char* format_game(const GameState* s) {
 845     static char game[100];
 846     static const int game_scoring[] = { 0, 15, 30, 40 };
 847
 848     if( PLAYER(s, 1).game < 4 && PLAYER(s, 2).game < 4) {
 849 #ifdef HAVE_VOICE_FILES
 850         if (PLAYER(s, 1).game > 0 || PLAYER(s, 2).game > 0) {
 851             if (PLAYER(s, 1).game == PLAYER(s, 2).game) {
 852                 voice_say_list(2, VOICE_LOVE_IN + 2*(PLAYER(s, 1).game), VOICE_ALL);
 853             } else {
 854                 voice_say_list(2, VOICE_LOVE_IN + 2*(PLAYER(s, 1).game), VOICE_LOVE_OUT + 2*(PLAYER(s, 2).game));
 855             }
 856         }
 857 #endif
 858         sprintf( game, "%d - %d", game_scoring[PLAYER(s, 1).game], game_scoring[PLAYER(s, 2).game]);
 859     } else if( PLAYER(s, 1).game > PLAYER(s, 2).game) {
 860 #ifdef HAVE_VOICE_FILES
 861         voice_say_list(1, VOICE_ADVANTAGE_PLAYER_ONE);
 862 #endif
 863         strcpy( game, "advantage player 1");
 864     } else if( PLAYER(s, 1).game < PLAYER(s, 2).game) {
 865 #ifdef HAVE_VOICE_FILES
 866         voice_say_list(1, VOICE_ADVANTAGE_PLAYER_TWO);
 867 #endif
 868         strcpy( game, "advantage player 2");
 869     } else {
 870 #ifdef HAVE_VOICE_FILES
 871         voice_say_list(1, VOICE_DEUCE);
 872 #endif
 873         strcpy( game, "deuce");
 874     }
 875
 876     return game;
 877 }
 878
 879 const char* format_status(const GameState* s) {
 880     static char status[100];
 881     static const char* set_names[] = { "first", "second", "third", "fourth", "fifth" };
 882
 883     switch (s->status_message) {
 884         case STATUSMSG_NONE:
 885             return "";
 886         case STATUSMSG_WELCOME:
 887             return "welcome to tennix " VERSION;
 888         case STATUSMSG_DEFAULT:
 889             sprintf(status, "%d:%d in %s set",
 890                     PLAYER(s, 1).sets[s->current_set],
 891                     PLAYER(s, 2).sets[s->current_set],
 892                     set_names[s->current_set]);
 893             return status;
 894         case STATUSMSG_NET:
 895             return "net!";
 896         case STATUSMSG_OUT:
 897             return "out!";
 898         case STATUSMSG_FAULT:
 899             return "fault!";
 900         case STATUSMSG_P1SCORES:
 901             return "player 1 scores.";
 902         case STATUSMSG_P2SCORES:
 903             return "player 2 scores.";
 904         case STATUSMSG_VOLLEY:
 905             return "volley!";
 906         case STATUSMSG_DIDNTCATCH:
 907             return "did not catch the ball.";
 908         default:
 909             return "";
 910     }
 911 }
 912
 913 winner_t game_get_winner(const GameState* s) {
 914     unsigned int i;
 915     int sets[2] = {0};
 916
 917     for( i=0; i<s->current_set; i++) {
 918         if( PLAYER(s, 1).sets[i] > PLAYER(s, 2).sets[i]) {
 919             sets[0]++;
 920         } else {
 921             sets[1]++;
 922         }
 923     }
 924
 925     if( sets[0] == SETS_TO_WIN) return WINNER_PLAYER1;
 926     if( sets[1] == SETS_TO_WIN) return WINNER_PLAYER2;
 927
 928     return WINNER_NONE;
 929 }
 930