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/SDL.h>
  25 #include <SDL/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 "shape.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_ship,             // Spaceship element
  55         *surf_life,     // Indicator of number of ships remaining
  56         *surf_rock[NROCKS],     // THE ROCKS
  57         *surf_font_big; // The big font
  58
  59
  60 SFont_Font *g_font;
  61
  62 // Structure global variables
  63 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
  64 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
  65
  66 // Other global variables
  67 char topline[1024];
  68 char *initerror = "";
  69
  70 struct shape shipshape;
  71 float shipx = XSIZE/2, shipy = YSIZE/2; // X position, 0..XSIZE
  72 float shipdx = SCREENDXMIN, shipdy = 0.0;       // Change in X position per tick.
  73 float screendx = SCREENDXMIN, screendy = 0.0;
  74 float xscroll, yscroll;
  75 float back_dist;
  76
  77 // all movement is based on t_frame.
  78 float t_frame;  // length of this frame (in ticks = 1/20th second)
  79 int ms_frame;   // length of this frame (milliseconds)
  80 int ms_end;     // end of this frame (milliseconds)
  81
  82 float bangx, bangy, bangdx, bangdy;
  83
  84 int nships,score;
  85 int jets = 0;
  86
  87 float fadetimer = 0, faderate;
  88
  89 int pausedown = 0, paused = 0;
  90
  91 // bangdot start (bd1) and end (bd2) position:
  92 int bd1 = 0, bd2 = 0;
  93
  94 enum states {
  95         TITLE_PAGE,
  96         GAMEPLAY,
  97         DEAD_PAUSE,
  98         GAME_OVER,
  99         HIGH_SCORE_ENTRY,
 100         HIGH_SCORE_DISPLAY
 101 };
 102 enum states state = TITLE_PAGE;
 103 float state_timeout = 600.0;
 104
 105 #define NSEQUENCE 2
 106 char *sequence[] = {
 107         "Press SPACE to start",
 108         "http://jasonwoof.org/vor"
 109 };
 110
 111 int bangdotlife, nbangdots;
 112 Uint16 heatcolor[W*3];
 113
 114 char *data_dir;
 115 extern char *optarg;
 116 extern int optind, opterr, optopt;
 117
 118 #define TO_TICKS(seconds) ((seconds)*20*opt_gamespeed)
 119
 120 // ************************************* FUNCS
 121
 122 void
 123 init_engine_dots() {
 124         int i;
 125         for(i = 0; i<MAXENGINEDOTS; i++) {
 126                 edot[i].active = 0;
 127         }
 128 }
 129
 130 void
 131 new_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s)
 132 {
 133         int x,y,endcount;
 134         uint16_t *pixel,c;
 135         uint32_t colorkey;
 136         int row_inc;
 137         double theta,r;
 138         int begin_generate;
 139
 140         begin_generate = SDL_GetTicks();
 141         pixel = s->pixels;
 142         row_inc = s->pitch/sizeof(uint16_t) - s->w;
 143         colorkey = s->format->colorkey;
 144
 145         SDL_LockSurface(s);
 146
 147         endcount = 0;
 148         while (endcount<3) {
 149                 pixel = s->pixels;
 150                 for(y=0; y<s->h; y++) {
 151                         for(x = 0; x<s->w; x++) {
 152                                 c = *pixel++;
 153                                 if(c && c != colorkey) {
 154                                         theta = frnd()*M_PI*2;
 155                                         r = frnd(); r = 1 - r*r;
 156                                         // r = 1 - frnd()*frnd();
 157
 158                                         bdot[bd2].dx = 45*r*cos(theta) + dx;
 159                                         bdot[bd2].dy = 45*r*sin(theta) + dy;
 160                                         bdot[bd2].x = x + xbang;
 161                                         bdot[bd2].y = y + ybang;
 162                                         bdot[bd2].c = 0;
 163                                         bdot[bd2].life = 100;
 164                                         bdot[bd2].decay = frnd()*3 + 1;
 165                                         bdot[bd2].active = 1;
 166
 167                                         // Replace the last few bang dots with the pixels from the exploding object
 168                                         if(endcount>0) bdot[bd2].c = c;
 169
 170                                         bd2 = (bd2+1) % MAXBANGDOTS;
 171                                 }
 172                                 pixel += row_inc;
 173                         }
 174                 }
 175                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 176         }
 177
 178         SDL_UnlockSurface(s);
 179 }
 180
 181 void
 182 draw_bang_dots(SDL_Surface *s)
 183 {
 184         int i;
 185         int first_i, last_i;
 186         uint16_t *pixels, *pixel, c;
 187         int row_inc = s->pitch/sizeof(uint16_t);
 188
 189         pixels = (uint16_t *) s->pixels;
 190         first_i = -1;
 191         last_i = 0;
 192
 193         for(i=0; i<MAXBANGDOTS; i++) {
 194                 if(!bdot[i].active) continue;
 195
 196                 // decrement life and maybe kill
 197                 bdot[i].life -= bdot[i].decay;
 198                 if(bdot[i].life<0) { bdot[i].active = 0; continue; }
 199
 200                 // move and clip
 201                 bdot[i].x += bdot[i].dx*t_frame - xscroll;
 202                 bdot[i].y += bdot[i].dy*t_frame - yscroll;
 203                 if(bdot[i].x < 0 || bdot[i].x >= XSIZE || bdot[i].y < 0 || bdot[i].y >= YSIZE) {
 204                         bdot[i].active = 0;
 205                         continue;
 206                 }
 207
 208                 // check collisions
 209                 if(pixel_hit_rocks(bdot[i].x, bdot[i].y)) { bdot[i].active = 0; continue; }
 210
 211                 pixel = pixels + row_inc*(int)(bdot[i].y) + (int)(bdot[i].x);
 212                 if(bdot[i].c) c = bdot[i].c; else c = heatcolor[(int)(bdot[i].life)*3];
 213                 *pixel = c;
 214         }
 215 }
 216
 217
 218 void
 219 new_engine_dots(int n, int dir) {
 220         int i;
 221         float a, r;  // angle, random length
 222         float dx, dy;
 223         float hx, hy; // half ship width/height.
 224         static const int s[4] = { 2, 1, 0, 1 };
 225
 226         hx = surf_ship->w / 2;
 227         hy = surf_ship->h / 2;
 228
 229         for(i = 0; i<n; i++) {
 230                 if(dotptr->active == 0) {
 231                         a = frnd()*M_PI + (dir-1)*M_PI_2;
 232                         r = sin(frnd()*M_PI);
 233                         dx = r * cos(a);
 234                         dy = r * -sin(a);  // screen y is "backwards".
 235
 236                         dotptr->active = 1;
 237                         dotptr->x = shipx + s[dir]*hx + (frnd()-0.5)*3;
 238                         dotptr->y = shipy + s[(dir+1)&3]*hy + (frnd()-0.5)*3;
 239                         if(dir&1) {
 240                                 dotptr->dx = shipdx + 2*dx;
 241                                 dotptr->dy = shipdy + 20*dy;
 242                                 dotptr->life = 60 * fabs(dy);
 243                         } else {
 244                                 dotptr->dx = shipdx + 20*dx;
 245                                 dotptr->dy = shipdy + 2*dy;
 246                                 dotptr->life = 60 * fabs(dx);
 247                         }
 248
 249                         if(dotptr - edot < MAXENGINEDOTS-1) dotptr++;
 250                         else dotptr = edot;
 251                 }
 252         }
 253 }
 254
 255 void
 256 draw_engine_dots(SDL_Surface *s) {
 257         int i;
 258         uint16_t c;
 259         uint16_t *pixels = (uint16_t *) s->pixels;
 260         int row_inc = s->pitch/sizeof(uint16_t);
 261         int heatindex;
 262
 263         for(i = 0; i<MAXENGINEDOTS; i++) {
 264                 if(!edot[i].active) continue;
 265                 edot[i].x += edot[i].dx*t_frame - xscroll;
 266                 edot[i].y += edot[i].dy*t_frame - yscroll;
 267                 edot[i].life -= t_frame*3;
 268                 if(edot[i].life < 0
 269                                 || edot[i].x<0 || edot[i].x >= XSIZE
 270                                 || edot[i].y<0 || edot[i].y >= YSIZE) {
 271                         edot[i].active = 0;
 272                         continue;
 273                 }
 274                 if(pixel_hit_rocks(edot[i].x, edot[i].y)) { edot[i].active = 0; continue; }
 275                 heatindex = edot[i].life * 6;
 276                 c = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 277                 pixels[row_inc*(int)(edot[i].y) + (int)(edot[i].x)] = c;
 278         }
 279 }
 280
 281 void
 282 drawdots(SDL_Surface *s) {
 283         int m;
 284
 285         // Create engine dots out the side we're moving from
 286         for(m = 0; m<4; m++) {
 287                 if(jets & 1<<m) { // 'jets' is a bit field
 288                         new_engine_dots(80,m);
 289                 }
 290         }
 291
 292         move_dust();
 293
 294         SDL_LockSurface(s);
 295         draw_dust(s);
 296         draw_engine_dots(s);
 297         draw_bang_dots(s);
 298         SDL_UnlockSurface(s);
 299 }
 300
 301 SDL_Surface *
 302 load_image(char *filename)
 303 {
 304         SDL_Surface *tmp, *img = NULL;
 305         char *s = add_data_path(filename);
 306         if(s) {
 307                 tmp = IMG_Load(s);
 308                 free(s);
 309                 if(tmp) {
 310                         img = SDL_DisplayFormat(tmp);
 311                         SDL_FreeSurface(tmp);
 312                 }
 313         }
 314         return img;
 315 }
 316
 317 int
 318 init(void) {
 319
 320         int i;
 321         char *s;
 322         Uint32 flag;
 323
 324         // Where are our data files?
 325         if(!find_files()) exit(1);
 326         read_high_score_table();
 327
 328         if(opt_sound) {
 329                 // Initialize SDL with audio and video
 330                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 331                         opt_sound = 0;
 332                         fputs("Can't open sound, starting without it\n", stderr);
 333                         atexit(SDL_Quit);
 334                 } else {
 335                         atexit(SDL_Quit);
 336                         atexit(SDL_CloseAudio);
 337                         opt_sound = init_sound();
 338                 }
 339         } else {
 340                 // Initialize with video only
 341                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 342                 atexit(SDL_Quit);
 343         }
 344
 345         play_tune(TUNE_TITLE_PAGE);
 346
 347         // Attempt to get the required video size
 348         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 349         if(opt_fullscreen) flag |= SDL_FULLSCREEN;
 350         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 351
 352         // Set the title bar text
 353         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 354
 355         NULLERROR(surf_screen);
 356
 357         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 358         for(i = 0; i<W*3; i++) {
 359                 heatcolor[i] = SDL_MapRGB(
 360                         surf_screen->format,
 361                         (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?
 362                 );
 363         }
 364
 365         // Load the banners
 366         NULLERROR(surf_b_variations = load_image("banners/variations.png"));
 367         NULLERROR(surf_b_on = load_image("banners/on.png"));
 368         NULLERROR(surf_b_rockdodger = load_image("banners/rockdodger.png"));
 369
 370         NULLERROR(surf_b_game = load_image("banners/game.png"));
 371         NULLERROR(surf_b_over = load_image("banners/over.png"));
 372
 373         // Load the spaceship graphic.
 374         NULLERROR(surf_ship = load_image("sprites/ship.png"));
 375         get_shape(surf_ship, &shipshape);
 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_rocks();
 392
 393         // Remove the mouse cursor
 394 #ifdef SDL_DISABLE
 395         SDL_ShowCursor(SDL_DISABLE);
 396 #endif
 397
 398         return 0;
 399 }
 400
 401 int
 402 draw() {
 403         int i;
 404         SDL_Rect dest;
 405         int bang, x;
 406         char *text;
 407         float fadegame,fadeover;
 408
 409         bang = 0;
 410
 411         // Draw a fully black background
 412         SDL_FillRect(surf_screen,NULL,0);
 413
 414         // Draw the background dots
 415         drawdots(surf_screen);
 416
 417         // Draw ship
 418         if(state == GAMEPLAY ) {
 419                 dest.x = shipx;
 420                 dest.y = shipy;
 421                 SDL_BlitSurface(surf_ship,NULL,surf_screen,&dest);
 422         }
 423
 424         draw_rocks();
 425
 426         // Draw the life indicators.
 427         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER) {
 428                 for(i = 0; i<nships-1; i++) {
 429                         dest.x = (i + 1)*(surf_life->w + 10);
 430                         dest.y = 20;
 431                         SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 432                 }
 433         }
 434
 435         // Draw the score
 436         snprintscore_line(topline, 50, score);
 437         SFont_Write(surf_screen, g_font, XSIZE-250, 0, topline);
 438
 439         // If it's game over, show the game over graphic in the dead centre
 440         switch (state) {
 441                 case GAME_OVER:
 442                         if(fadetimer<3.0/faderate) {
 443                                 fadegame = fadetimer/(3.0/faderate);
 444                         } else {
 445                                 fadegame = 1.0;
 446                         }
 447
 448                         if(fadetimer<3.0/faderate) {
 449                                 fadeover = 0.0;
 450                         } else if(fadetimer<6.0/faderate) {
 451                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 452                         } else {
 453                                 fadeover = 1.0;
 454                         }
 455
 456                         dest.x = (XSIZE-surf_b_game->w)/2;
 457                         dest.y = (YSIZE-surf_b_game->h)/2-40;
 458                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += t_frame/1.0))));
 459                         SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
 460
 461                         dest.x = (XSIZE-surf_b_over->w)/2;
 462                         dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 463                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 464                         SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 465                 break;
 466
 467                 case TITLE_PAGE:
 468
 469                         dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
 470                         dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
 471                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += t_frame/2.0)));
 472                         SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
 473
 474                         dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 475                         dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 476                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 477                         SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
 478
 479                         dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 480                         dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 481                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 482                         SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 483
 484                         text = "Version " VERSION;
 485                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 486                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 487
 488                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 489                         //text = "Press SPACE to start!";
 490                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 491                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 492                 break;
 493
 494                 case HIGH_SCORE_ENTRY:
 495                         play_tune(TUNE_HIGH_SCORE_ENTRY);
 496                         if(!process_score_input()) {  // done inputting name
 497
 498                                 // Change state to briefly show high scores page
 499                                 state = HIGH_SCORE_DISPLAY;
 500                                 state_timeout = 200;
 501
 502                                 // Write the high score table to the file
 503                                 write_high_score_table();
 504
 505                                 play_tune(TUNE_TITLE_PAGE);
 506                         }
 507                 // FALL THROUGH TO
 508                 case HIGH_SCORE_DISPLAY:
 509                         // Display de list o high scores mon.
 510                         display_scores(surf_screen, 150,50);
 511                         break;
 512                 case GAMEPLAY:
 513                 case DEAD_PAUSE:
 514                         ; // no action necessary
 515         }
 516
 517         if(state == GAMEPLAY) {
 518                 bang = hit_rocks(shipx, shipy, &shipshape);
 519         }
 520
 521         ms_frame = SDL_GetTicks() - ms_end;
 522         ms_end += ms_frame;
 523         if(ms_frame>200 || ms_frame<0) {
 524                 // We won't run at all below 5 frames per second.
 525                 // This also happens if we were paused, grr.
 526                 t_frame = 0;
 527                 ms_frame = 0;
 528         } else {
 529                 t_frame = opt_gamespeed * ms_frame / 50;
 530                 if(state == GAMEPLAY) score += ms_frame;
 531         }
 532
 533         // Update the surface
 534         SDL_Flip(surf_screen);
 535
 536
 537         return bang;
 538 }
 539
 540 int
 541 gameloop() {
 542         Uint8 *keystate = SDL_GetKeyState(NULL);
 543         float tmp;
 544
 545
 546         for(;;) {
 547                 if(!paused) {
 548                         // Count down the game loop timer, and change state when it gets to zero or less;
 549
 550                         if((state_timeout -= t_frame*3) < 0) {
 551                                 switch(state) {
 552                                         case DEAD_PAUSE:
 553                                                 // Create a new ship and start all over again
 554                                                 state = GAMEPLAY;
 555                                                 play_tune(TUNE_GAMEPLAY);
 556                                                 break;
 557                                         case GAME_OVER:
 558                                                 if(new_high_score(score)) {
 559                                                         SDL_Event e;
 560                                                         state = HIGH_SCORE_ENTRY;
 561                                                         state_timeout = 5.0e6;
 562                                                         SDL_EnableUNICODE(1);
 563                                                         while(SDL_PollEvent(&e))
 564                                                                 ;
 565                                                 } else if(!keystate[SDLK_SPACE]) {
 566                                                         state = HIGH_SCORE_DISPLAY;
 567                                                         state_timeout = 400;
 568                                                 }
 569                                                 break;
 570                                         case HIGH_SCORE_DISPLAY:
 571                                                 state = TITLE_PAGE;
 572                                                 state_timeout = 500.0;
 573                                                 break;
 574                                         case HIGH_SCORE_ENTRY:
 575                                                 break;
 576                                         case TITLE_PAGE:
 577                                                 state = HIGH_SCORE_DISPLAY;
 578                                                 state_timeout = 200.0;
 579                                                 break;
 580                                         case GAMEPLAY:
 581                                                 ; // no action necessary
 582                                 }
 583                         } else {
 584                                 if(state == DEAD_PAUSE) {
 585                                         float blast_radius;
 586                                         int fixonly;
 587
 588                                         if(state_timeout < DEAD_PAUSE_LENGTH - 20.0) {
 589                                                 blast_radius = BLAST_RADIUS * 1.3;
 590                                                 fixonly = 1;
 591                                         } else {
 592                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 593                                                 fixonly = 0;
 594                                         }
 595                                         blast_rocks(bangx, bangy, blast_radius, fixonly);
 596
 597                                         if(bangx < 60) bangx = 60;
 598                                 }
 599                         }
 600
 601                         new_rocks();
 602
 603                         // SCROLLING
 604                         tmp = (shipy+shipdy*t_frame-YSCROLLTO)/25 + (shipdy-screendy);
 605                         screendy += tmp * t_frame/12;
 606                         tmp = (shipx+shipdx*t_frame-XSCROLLTO)/25 + (shipdx-screendx);
 607                         screendx += tmp * t_frame/12;
 608                         // taper off so we don't hit the barrier abruptly.
 609                         // (if we would hit in < 2 seconds, adjust to 2 seconds).
 610                         if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0) {
 611                                 screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
 612                         }
 613
 614                         back_dist += (screendx - SCREENDXMIN)*t_frame;
 615                         if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
 616
 617                         xscroll = screendx * t_frame;
 618                         yscroll = screendy * t_frame;
 619
 620                         shipx += shipdx*t_frame - xscroll;
 621                         shipy += shipdy*t_frame - yscroll;
 622
 623                         // move bang center
 624                         bangx += bangdx*t_frame - xscroll;
 625                         bangy += bangdy*t_frame - yscroll;
 626
 627                         move_rocks();
 628
 629
 630                         // BOUNCE X
 631                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 632                                 // BOUNCE from left and right wall
 633                                 shipx -= (shipdx-screendx)*t_frame;
 634                                 shipdx = screendx - (shipdx-screendx)*opt_bounciness;
 635                         }
 636
 637                         // BOUNCE Y
 638                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 639                                 // BOUNCE from top and bottom wall
 640                                 shipy -= (shipdy-screendy)*t_frame;
 641                                 shipdy = screendy - (shipdy-screendy)*opt_bounciness;
 642                         }
 643
 644
 645                         if(draw() && state == GAMEPLAY) {
 646                                 // Died
 647                                 play_sound(SOUND_BANG); // Play the explosion sound
 648                                 bangx = shipx; bangy = shipy; bangdx = shipdx; bangdy = shipdy;
 649                                 new_bang_dots(shipx,shipy,shipdx,shipdy,surf_ship);
 650                                 shipdx *= 0.5; shipdy *= 0.5;
 651                                 if(shipdx < SCREENDXMIN) shipdx = SCREENDXMIN;
 652                                 if(--nships <= 0) {
 653                                         state = GAME_OVER;
 654                                         shipdx = SCREENDXMIN; shipdy = 0;
 655                                         state_timeout = 200.0;
 656                                         fadetimer = 0.0;
 657                                         faderate = t_frame;
 658                                 }
 659                                 else {
 660                                         state = DEAD_PAUSE;
 661                                         state_timeout = DEAD_PAUSE_LENGTH;
 662                                 }
 663                         }
 664
 665                         SDL_PumpEvents();
 666                         keystate = SDL_GetKeyState(NULL);
 667
 668                         // new game
 669                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 670
 671                                 reset_rocks();
 672
 673                                 nships = 4;
 674                                 score = 0;
 675
 676                                 state = GAMEPLAY;
 677                                 play_tune(TUNE_GAMEPLAY);
 678
 679                                 shipx = XSIZE/2.2; shipy = YSIZE/2;
 680                                 shipdx = screendx; shipdy = screendy;
 681                         }
 682
 683                         jets = 0;
 684                 } else {
 685                         SDL_PumpEvents();
 686                         keystate = SDL_GetKeyState(NULL);
 687                 }
 688
 689                 if(state == GAMEPLAY) {
 690                         if(!paused) {
 691                                 if(keystate[SDLK_LEFT]  | keystate[SDLK_h]) { shipdx -= 1.5*t_frame; jets |= 1<<0;}
 692                                 if(keystate[SDLK_DOWN]  | keystate[SDLK_t]) { shipdy += 1.5*t_frame; jets |= 1<<1;}
 693                                 if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { shipdx += 1.5*t_frame; jets |= 1<<2;}
 694                                 if(keystate[SDLK_UP]    | keystate[SDLK_c]) { shipdy -= 1.5*t_frame; jets |= 1<<3;}
 695                                 if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 696                         }
 697
 698                         if(keystate[SDLK_p] | keystate[SDLK_s]) {
 699                                 if(!pausedown) {
 700                                         paused = !paused;
 701                                         pausedown = 1;
 702                                 }
 703                         } else {
 704                                 pausedown = 0;
 705                         }
 706                 } else if(state == GAME_OVER) {
 707                         if(keystate[SDLK_SPACE]) {
 708                                 state_timeout = -1;
 709                         }
 710                 }
 711
 712                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 713                         return 0;
 714                 }
 715
 716         }
 717 }
 718
 719 int
 720 main(int argc, char **argv) {
 721         init_opts();
 722         argp_parse(&argp, argc, argv, 0, 0, 0);
 723
 724         if(init()) {
 725                 printf ("ta: '%s'\n",initerror);
 726                 return 1;
 727         }
 728
 729         gameloop();
 730
 731         return 0;
 732 }