main.c

   1 /* Variations on RockDodger
   2  * Space Rocks copyright (C) 2001 Paul Holt <pad@pcholt.com>
   3  *
   4  * Project fork 2004, Jason Woofenden and Joshua Grams.
   5  * (a whole bunch of modifications and project rename)
   6
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; either version 2 of the License, or (at your
  10  * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21
  22 #include <argp.h>
  23 #include <math.h>
  24 #include <SDL.h>
  25 #include <SDL_image.h>
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include "SFont.h"
  32
  33 #include "args.h"
  34 #include "common.h"
  35 #include "config.h"
  36 #include "dust.h"
  37 #include "file.h"
  38 #include "globals.h"
  39 #include "mt.h"
  40 #include "rocks.h"
  41 #include "score.h"
  42 #include "sprite.h"
  43 #include "sound.h"
  44
  45 // ************************************* VARS
  46 // SDL_Surface global variables
  47 SDL_Surface
  48         *surf_screen,   // Screen
  49         *surf_b_variations, // "variations" banner
  50         *surf_b_on, // "on" banner
  51         *surf_b_rockdodger, // "rockdodger" banner
  52         *surf_b_game,   // Title element "game"
  53         *surf_b_over,   // Title element "over"
  54         *surf_life,     // Indicator of number of ships remaining
  55         *surf_rock[NROCKS],     // THE ROCKS
  56         *surf_font_big; // The big font
  57
  58
  59 SFont_Font *g_font;
  60
  61 // Structure global variables
  62 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
  63 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
  64
  65 // Other global variables
  66 char topline[1024];
  67 char *initerror = "";
  68
  69 struct ship ship = { SHIP, 0, NULL, XSIZE/2, YSIZE/2, SCREENDXMIN, 0.0 };
  70
  71 float screendx = SCREENDXMIN, screendy = 0.0;
  72 float xscroll, yscroll;
  73 float back_dist;
  74
  75 // all movement is based on t_frame.
  76 float t_frame;  // length of this frame (in ticks = 1/20th second)
  77 int ms_frame;   // length of this frame (milliseconds)
  78 int ms_end;     // end of this frame (milliseconds)
  79
  80 int bang = false;
  81 float bangx, bangy, bangdx, bangdy;
  82
  83 int score;
  84
  85 float fadetimer = 0, faderate;
  86
  87 int pausedown = 0, paused = 0;
  88
  89 // bangdot start (bd1) and end (bd2) position:
  90 int bd1 = 0, bd2 = 0;
  91
  92 enum states {
  93         TITLE_PAGE,
  94         GAMEPLAY,
  95         DEAD_PAUSE,
  96         GAME_OVER,
  97         HIGH_SCORE_ENTRY,
  98         HIGH_SCORE_DISPLAY
  99 };
 100 enum states state = TITLE_PAGE;
 101 float state_timeout = 600.0;
 102
 103 #define NSEQUENCE 2
 104 char *sequence[] = {
 105         "Press SPACE to start",
 106         "http://jasonwoof.org/vor"
 107 };
 108
 109 int bangdotlife, nbangdots;
 110 Uint16 heatcolor[W*3];
 111
 112 char *data_dir;
 113 extern char *optarg;
 114 extern int optind, opterr, optopt;
 115
 116 #define TO_TICKS(seconds) ((seconds)*20*opt_gamespeed)
 117
 118 // ************************************* FUNCS
 119
 120 void
 121 init_engine_dots() {
 122         int i;
 123         for(i = 0; i<MAXENGINEDOTS; i++) {
 124                 edot[i].active = 0;
 125         }
 126 }
 127
 128 void
 129 new_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s)
 130 {
 131         int x,y,endcount;
 132         uint16_t *pixel,c;
 133         uint32_t colorkey;
 134         int row_inc;
 135         double theta,r;
 136         int begin_generate;
 137
 138         begin_generate = SDL_GetTicks();
 139         pixel = s->pixels;
 140         row_inc = s->pitch/sizeof(uint16_t) - s->w;
 141         colorkey = s->format->colorkey;
 142
 143         SDL_LockSurface(s);
 144
 145         endcount = 0;
 146         while (endcount<3) {
 147                 pixel = s->pixels;
 148                 for(y=0; y<s->h; y++) {
 149                         for(x = 0; x<s->w; x++) {
 150                                 c = *pixel++;
 151                                 if(c && c != colorkey) {
 152                                         theta = frnd()*M_PI*2;
 153                                         r = frnd(); r = 1 - r*r;
 154                                         // r = 1 - frnd()*frnd();
 155
 156                                         bdot[bd2].dx = 45*r*cos(theta) + dx;
 157                                         bdot[bd2].dy = 45*r*sin(theta) + dy;
 158                                         bdot[bd2].x = x + xbang;
 159                                         bdot[bd2].y = y + ybang;
 160                                         bdot[bd2].c = 0;
 161                                         bdot[bd2].life = 100;
 162                                         bdot[bd2].decay = frnd()*3 + 1;
 163                                         bdot[bd2].active = 1;
 164
 165                                         // Replace the last few bang dots with the pixels from the exploding object
 166                                         if(endcount>0) bdot[bd2].c = c;
 167
 168                                         bd2 = (bd2+1) % MAXBANGDOTS;
 169                                 }
 170                                 pixel += row_inc;
 171                         }
 172                 }
 173                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 174         }
 175
 176         SDL_UnlockSurface(s);
 177 }
 178
 179 void
 180 draw_bang_dots(SDL_Surface *s)
 181 {
 182         int i;
 183         int first_i, last_i;
 184         uint16_t *pixels, *pixel, c;
 185         int row_inc = s->pitch/sizeof(uint16_t);
 186
 187         pixels = (uint16_t *) s->pixels;
 188         first_i = -1;
 189         last_i = 0;
 190
 191         for(i=0; i<MAXBANGDOTS; i++) {
 192                 if(!bdot[i].active) continue;
 193
 194                 // decrement life and maybe kill
 195                 bdot[i].life -= bdot[i].decay;
 196                 if(bdot[i].life<0) { bdot[i].active = 0; continue; }
 197
 198                 // move and clip
 199                 bdot[i].x += bdot[i].dx*t_frame - xscroll;
 200                 bdot[i].y += bdot[i].dy*t_frame - yscroll;
 201                 if(bdot[i].x < 0 || bdot[i].x >= XSIZE || bdot[i].y < 0 || bdot[i].y >= YSIZE) {
 202                         bdot[i].active = 0;
 203                         continue;
 204                 }
 205
 206                 // check collisions
 207                 if(pixel_collides(bdot[i].x, bdot[i].y)) { bdot[i].active = 0; continue; }
 208
 209                 pixel = pixels + row_inc*(int)(bdot[i].y) + (int)(bdot[i].x);
 210                 if(bdot[i].c) c = bdot[i].c; else c = heatcolor[(int)(bdot[i].life)*3];
 211                 *pixel = c;
 212         }
 213 }
 214
 215
 216 void
 217 new_engine_dots(int n, int dir) {
 218         int i;
 219         float a, r;  // angle, random length
 220         float dx, dy;
 221         float hx, hy; // half ship width/height.
 222         static const int s[4] = { 2, 1, 0, 1 };
 223
 224         hx = ship.image->w / 2;
 225         hy = ship.image->h / 2;
 226
 227         for(i = 0; i<n; i++) {
 228                 if(dotptr->active == 0) {
 229                         a = frnd()*M_PI + (dir-1)*M_PI_2;
 230                         r = sin(frnd()*M_PI);
 231                         dx = r * cos(a);
 232                         dy = r * -sin(a);  // screen y is "backwards".
 233
 234                         dotptr->active = 1;
 235                         dotptr->x = ship.x + s[dir]*hx + (frnd()-0.5)*3;
 236                         dotptr->y = ship.y + s[(dir+1)&3]*hy + (frnd()-0.5)*3;
 237                         if(dir&1) {
 238                                 dotptr->dx = ship.dx + 2*dx;
 239                                 dotptr->dy = ship.dy + 20*dy;
 240                                 dotptr->life = 60 * fabs(dy);
 241                         } else {
 242                                 dotptr->dx = ship.dx + 20*dx;
 243                                 dotptr->dy = ship.dy + 2*dy;
 244                                 dotptr->life = 60 * fabs(dx);
 245                         }
 246
 247                         if(dotptr - edot < MAXENGINEDOTS-1) dotptr++;
 248                         else dotptr = edot;
 249                 }
 250         }
 251 }
 252
 253 void
 254 draw_engine_dots(SDL_Surface *s) {
 255         int i;
 256         uint16_t c;
 257         uint16_t *pixels = (uint16_t *) s->pixels;
 258         int row_inc = s->pitch/sizeof(uint16_t);
 259         int heatindex;
 260
 261         for(i = 0; i<MAXENGINEDOTS; i++) {
 262                 if(!edot[i].active) continue;
 263                 edot[i].x += edot[i].dx*t_frame - xscroll;
 264                 edot[i].y += edot[i].dy*t_frame - yscroll;
 265                 edot[i].life -= t_frame*3;
 266                 if(edot[i].life < 0
 267                                 || edot[i].x<0 || edot[i].x >= XSIZE
 268                                 || edot[i].y<0 || edot[i].y >= YSIZE) {
 269                         edot[i].active = 0;
 270                         continue;
 271                 }
 272                 if(pixel_collides(edot[i].x, edot[i].y)) { edot[i].active = 0; continue; }
 273                 heatindex = edot[i].life * 6;
 274                 c = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 275                 pixels[row_inc*(int)(edot[i].y) + (int)(edot[i].x)] = c;
 276         }
 277 }
 278
 279 void
 280 drawdots(SDL_Surface *s) {
 281         int m;
 282
 283         // Create engine dots out the side we're moving from
 284         for(m = 0; m<4; m++) {
 285                 if(ship.jets & 1<<m) { // 'jets' is a bit field
 286                         new_engine_dots(80,m);
 287                 }
 288         }
 289
 290         move_dust();
 291
 292         SDL_LockSurface(s);
 293         draw_dust(s);
 294         draw_engine_dots(s);
 295         draw_bang_dots(s);
 296         SDL_UnlockSurface(s);
 297 }
 298
 299 SDL_Surface *
 300 load_image(char *filename)
 301 {
 302         SDL_Surface *tmp, *img = NULL;
 303         char *s = add_data_path(filename);
 304         if(s) {
 305                 tmp = IMG_Load(s);
 306                 free(s);
 307                 if(tmp) {
 308                         img = SDL_DisplayFormat(tmp);
 309                         SDL_FreeSurface(tmp);
 310                 }
 311         }
 312         return img;
 313 }
 314
 315 void
 316 load_ship(void)
 317 {
 318         load_sprite(SPRITE(&ship), "sprites/ship.png");
 319 }
 320
 321 int
 322 init(void) {
 323
 324         int i;
 325         char *s;
 326         Uint32 flag;
 327
 328         // Where are our data files?
 329         if(!find_files()) exit(1);
 330         read_high_score_table();
 331
 332         if(opt_sound) {
 333                 // Initialize SDL with audio and video
 334                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 335                         opt_sound = 0;
 336                         fputs("Can't open sound, starting without it\n", stderr);
 337                         atexit(SDL_Quit);
 338                 } else {
 339                         atexit(SDL_Quit);
 340                         atexit(SDL_CloseAudio);
 341                         opt_sound = init_sound();
 342                 }
 343         } else {
 344                 // Initialize with video only
 345                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 346                 atexit(SDL_Quit);
 347         }
 348
 349         play_tune(TUNE_TITLE_PAGE);
 350
 351         // Attempt to get the required video size
 352         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 353         if(opt_fullscreen) flag |= SDL_FULLSCREEN;
 354         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 355
 356         // Set the title bar text
 357         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 358
 359         NULLERROR(surf_screen);
 360
 361         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 362         for(i = 0; i<W*3; i++) {
 363                 heatcolor[i] = SDL_MapRGB(
 364                         surf_screen->format,
 365                         (i<W)?(i*M/W):(M),(i<W)?0:(i<2*W)?((i-W)*M/W):M,(i<2*W)?0:((i-W)*M/W) // Got that?
 366                 );
 367         }
 368
 369         // Load the banners
 370         NULLERROR(surf_b_variations = load_image("banners/variations.png"));
 371         NULLERROR(surf_b_on = load_image("banners/on.png"));
 372         NULLERROR(surf_b_rockdodger = load_image("banners/rockdodger.png"));
 373
 374         NULLERROR(surf_b_game = load_image("banners/game.png"));
 375         NULLERROR(surf_b_over = load_image("banners/over.png"));
 376
 377         // Load the life indicator (small ship) graphic.
 378         NULLERROR(surf_life = load_image("indicators/life.png"));
 379
 380         // Load the font image
 381         s = add_data_path(BIG_FONT_FILE);
 382         if(s) {
 383                 NULLERROR(surf_font_big = IMG_Load(s));
 384                 free(s);
 385                 g_font = SFont_InitFont(surf_font_big);
 386         }
 387
 388         init_engine_dots();
 389         init_dust();
 390
 391         init_sprites();
 392         add_sprite(SPRITE(&ship));
 393
 394         // Remove the mouse cursor
 395 #ifdef SDL_DISABLE
 396         SDL_ShowCursor(SDL_DISABLE);
 397 #endif
 398
 399         return 0;
 400 }
 401
 402 void
 403 show_lives(void)
 404 {
 405         int i;
 406         SDL_Rect dest;
 407
 408         for(i=0; i<ship.lives-1; i++) {
 409                 dest.x = (i + 1)*(surf_life->w + 10);
 410                 dest.y = 20;
 411                 SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 412         }
 413 }
 414
 415 void
 416 draw(void) {
 417         SDL_Rect dest;
 418         int x;
 419         char *text;
 420         float fadegame,fadeover;
 421
 422         SDL_FillRect(surf_screen,NULL,0);  // black background
 423         drawdots(surf_screen);             // background dots
 424         draw_sprite(SPRITE(&ship));
 425         draw_rocks();
 426
 427         show_lives();
 428         show_score();
 429
 430         // If it's game over, show the game over graphic in the dead centre
 431         switch (state) {
 432                 case GAME_OVER:
 433                         if(fadetimer<3.0/faderate) {
 434                                 fadegame = fadetimer/(3.0/faderate);
 435                         } else {
 436                                 fadegame = 1.0;
 437                         }
 438
 439                         if(fadetimer<3.0/faderate) {
 440                                 fadeover = 0.0;
 441                         } else if(fadetimer<6.0/faderate) {
 442                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 443                         } else {
 444                                 fadeover = 1.0;
 445                         }
 446
 447                         dest.x = (XSIZE-surf_b_game->w)/2;
 448                         dest.y = (YSIZE-surf_b_game->h)/2-40;
 449                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += t_frame/1.0))));
 450                         SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
 451
 452                         dest.x = (XSIZE-surf_b_over->w)/2;
 453                         dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 454                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 455                         SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 456                 break;
 457
 458                 case TITLE_PAGE:
 459
 460                         dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
 461                         dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
 462                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += t_frame/2.0)));
 463                         SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
 464
 465                         dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 466                         dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 467                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 468                         SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
 469
 470                         dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 471                         dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 472                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 473                         SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 474
 475                         text = "Version " VERSION;
 476                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 477                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 478
 479                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 480                         //text = "Press SPACE to start!";
 481                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 482                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 483                 break;
 484
 485                 case HIGH_SCORE_ENTRY:
 486                         play_tune(TUNE_HIGH_SCORE_ENTRY);
 487                         if(!process_score_input()) {  // done inputting name
 488
 489                                 // Change state to briefly show high scores page
 490                                 state = HIGH_SCORE_DISPLAY;
 491                                 state_timeout = 200;
 492
 493                                 // Write the high score table to the file
 494                                 write_high_score_table();
 495
 496                                 play_tune(TUNE_TITLE_PAGE);
 497                         }
 498                 // FALL THROUGH TO
 499                 case HIGH_SCORE_DISPLAY:
 500                         // Display de list o high scores mon.
 501                         display_scores(surf_screen, 150,50);
 502                         break;
 503                 case GAMEPLAY:
 504                 case DEAD_PAUSE:
 505                         ; // no action necessary
 506         }
 507
 508         collisions();
 509
 510         ms_frame = SDL_GetTicks() - ms_end;
 511         ms_end += ms_frame;
 512         t_frame = opt_gamespeed * ms_frame / 50;
 513         if(state == GAMEPLAY) score += ms_frame;
 514
 515         // Update the surface
 516         SDL_Flip(surf_screen);
 517 }
 518
 519 static inline void
 520 kill_ship(Sprite *ship)
 521 {
 522         ship->flags = MOVE|DRAW;
 523         SDL_SetAlpha(ship->image, SDL_SRCALPHA, 0);
 524         bang = true;
 525 }
 526
 527 void
 528 do_collision(Sprite *a, Sprite *b)
 529 {
 530         if(a->type == SHIP) kill_ship(a);
 531         else if (b->type == SHIP) kill_ship(b);
 532         else bounce(a, b);
 533 }
 534
 535 void
 536 gameloop() {
 537         Uint8 *keystate = SDL_GetKeyState(NULL);
 538         float tmp;
 539
 540
 541         for(;;) {
 542                 SDL_PumpEvents();
 543                 keystate = SDL_GetKeyState(NULL);
 544
 545                 if(!paused) {
 546                         // Count down the game loop timer, and change state when it gets to zero or less;
 547
 548                         if((state_timeout -= t_frame*3) < 0) {
 549                                 switch(state) {
 550                                         case DEAD_PAUSE:
 551                                                 // Restore the ship and continue playing
 552                                                 ship.flags = DRAW|MOVE|COLLIDE;
 553                                                 state = GAMEPLAY;
 554                                                 play_tune(TUNE_GAMEPLAY);
 555                                                 break;
 556                                         case GAME_OVER:
 557                                                 if(new_high_score(score)) {
 558                                                         SDL_Event e;
 559                                                         state = HIGH_SCORE_ENTRY;
 560                                                         state_timeout = 5.0e6;
 561                                                         SDL_EnableUNICODE(1);
 562                                                         while(SDL_PollEvent(&e))
 563                                                                 ;
 564                                                 } else {
 565                                                         state = HIGH_SCORE_DISPLAY;
 566                                                         state_timeout = 400;
 567                                                 }
 568                                                 break;
 569                                         case HIGH_SCORE_DISPLAY:
 570                                                 state = TITLE_PAGE;
 571                                                 state_timeout = 500.0;
 572                                                 break;
 573                                         case HIGH_SCORE_ENTRY:
 574                                                 break;
 575                                         case TITLE_PAGE:
 576                                                 state = HIGH_SCORE_DISPLAY;
 577                                                 state_timeout = 200.0;
 578                                                 break;
 579                                         case GAMEPLAY:
 580                                                 ; // no action necessary
 581                                 }
 582                         } else {
 583                                 if(state == DEAD_PAUSE) {
 584                                         float blast_radius, alpha;
 585                                         if(state_timeout >= DEAD_PAUSE_LENGTH - 20.0) {
 586                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 587                                                 blast_rocks(bangx, bangy, blast_radius);
 588                                         }
 589
 590                                         if(bangx < 60) bangx = 60;
 591
 592                                         alpha = 255.0 * (DEAD_PAUSE_LENGTH - state_timeout) / DEAD_PAUSE_LENGTH;
 593                                         SDL_SetAlpha(ship.image, SDL_SRCALPHA, (uint8_t)alpha);
 594                                 }
 595                         }
 596
 597                         new_rocks();
 598
 599                         // SCROLLING
 600                         tmp = (ship.y+ship.dy*t_frame-YSCROLLTO)/25 + (ship.dy-screendy);
 601                         screendy += tmp * t_frame/12;
 602                         tmp = (ship.x+ship.dx*t_frame-XSCROLLTO)/25 + (ship.dx-screendx);
 603                         screendx += tmp * t_frame/12;
 604                         // taper off so we don't hit the barrier abruptly.
 605                         // (if we would hit in < 2 seconds, adjust to 2 seconds).
 606                         if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0) {
 607                                 screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
 608                         }
 609
 610                         back_dist += (screendx - SCREENDXMIN)*t_frame;
 611                         if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
 612
 613                         xscroll = screendx * t_frame;
 614                         yscroll = screendy * t_frame;
 615
 616                         // move bang center
 617                         bangx += bangdx*t_frame - xscroll;
 618                         bangy += bangdy*t_frame - yscroll;
 619
 620                         move_sprites();
 621
 622
 623                         // BOUNCE off left or right edge of screen
 624                         if(ship.x < 0 || ship.x+ship.w > XSIZE) {
 625                                 ship.x -= (ship.dx-screendx)*t_frame;
 626                                 ship.dx = screendx - (ship.dx-screendx)*opt_bounciness;
 627                         }
 628
 629                         // BOUNCE off top or bottom of screen
 630                         if(ship.y < 0 || ship.y+ship.h > YSIZE) {
 631                                 ship.y -= (ship.dy-screendy)*t_frame;
 632                                 ship.dy = screendy - (ship.dy-screendy)*opt_bounciness;
 633                         }
 634
 635                         draw();
 636
 637                         if(state == GAMEPLAY && bang) {
 638                                 // Died
 639                                 bang = false;
 640                                 play_sound(SOUND_BANG); // Play the explosion sound
 641                                 bangx = ship.x; bangy = ship.y; bangdx = ship.dx; bangdy = ship.dy;
 642                                 new_bang_dots(ship.x,ship.y,ship.dx,ship.dy,ship.image);
 643                                 ship.dx *= 0.5; ship.dy *= 0.5;
 644                                 if(ship.dx < SCREENDXMIN) ship.dx = SCREENDXMIN;
 645                                 if(--ship.lives <= 0) {
 646                                         state = GAME_OVER;
 647                                         ship.dx = SCREENDXMIN; ship.dy = 0;
 648                                         state_timeout = 200.0;
 649                                         fadetimer = 0.0;
 650                                         faderate = t_frame;
 651                                 } else {
 652                                         state = DEAD_PAUSE;
 653                                         state_timeout = DEAD_PAUSE_LENGTH;
 654                                 }
 655                         }
 656
 657                         // new game
 658                         if(keystate[SDLK_SPACE]
 659                            && (state == HIGH_SCORE_DISPLAY
 660                                || state == TITLE_PAGE
 661                                || state == GAME_OVER)) {
 662                                 reset_sprites();
 663                                 reset_rocks();
 664
 665                                 ship.x = XSIZE/2.2; ship.y = YSIZE/2;
 666                                 ship.dx = screendx; ship.dy = screendy;
 667                                 ship.lives = 4;
 668                                 ship.flags = MOVE|DRAW|COLLIDE;
 669                                 SDL_SetAlpha(ship.image, SDL_SRCALPHA, SDL_ALPHA_OPAQUE);
 670                                 add_sprite(SPRITE(&ship));
 671
 672                                 score = 0;
 673
 674                                 state = GAMEPLAY;
 675                                 play_tune(TUNE_GAMEPLAY);
 676                         }
 677
 678                         ship.jets = 0;
 679                 }
 680
 681                 if(state == GAMEPLAY || state == DEAD_PAUSE) {
 682                         if(!paused) {
 683                                 if(keystate[SDLK_LEFT]  | keystate[SDLK_h]) { ship.dx -= 1.5*t_frame; ship.jets |= 1<<0;}
 684                                 if(keystate[SDLK_DOWN]  | keystate[SDLK_t]) { ship.dy += 1.5*t_frame; ship.jets |= 1<<1;}
 685                                 if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { ship.dx += 1.5*t_frame; ship.jets |= 1<<2;}
 686                                 if(keystate[SDLK_UP]    | keystate[SDLK_c]) { ship.dy -= 1.5*t_frame; ship.jets |= 1<<3;}
 687                                 if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 688                         }
 689
 690                         if(keystate[SDLK_p] | keystate[SDLK_s]) {
 691                                 if(!pausedown) {
 692                                         paused = !paused;
 693                                         pausedown = 1;
 694                                         if(!paused) ms_end = SDL_GetTicks();
 695                                 }
 696                         } else {
 697                                 pausedown = 0;
 698                         }
 699                 }
 700
 701                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE]))
 702                         return;
 703
 704         }
 705 }
 706
 707 int
 708 main(int argc, char **argv) {
 709         init_opts();
 710         argp_parse(&argp, argc, argv, 0, 0, 0);
 711
 712         if(init()) {
 713                 printf ("ta: '%s'\n",initerror);
 714                 return 1;
 715         }
 716
 717         gameloop();
 718
 719         return 0;
 720 }