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 back_dist;
  73
  74 // all movement is based on t_frame.
  75 float t_frame;  // length of this frame (in ticks = 1/20th second)
  76 int ms_frame;   // length of this frame (milliseconds)
  77 int ms_end;     // end of this frame (milliseconds)
  78
  79 int bang = false;
  80 float bangx, bangy, bangdx, bangdy;
  81
  82 int score;
  83
  84 float fadetimer = 0, faderate;
  85
  86 int pausedown = 0, paused = 0;
  87
  88 // bangdot start (bd1) and end (bd2) position:
  89 int bd1 = 0, bd2 = 0;
  90
  91 enum states {
  92         TITLE_PAGE,
  93         GAMEPLAY,
  94         DEAD_PAUSE,
  95         GAME_OVER,
  96         HIGH_SCORE_ENTRY,
  97         HIGH_SCORE_DISPLAY
  98 };
  99 enum states state = TITLE_PAGE;
 100 float state_timeout = 600.0;
 101
 102 #define NSEQUENCE 3
 103 char *msgs[2][3] = {
 104         {
 105                 "Press SPACE for normal game",
 106                 "Press 'e' for easy game",
 107                 "http://jasonwoof.org/vor"
 108         },
 109         {
 110                 "Press SPACE for easy game",
 111                 "Press 'n' for normal game",
 112                 "http://jasonwoof.org/vor"
 113         }
 114 };
 115
 116 int bangdotlife, nbangdots;
 117 Uint16 heatcolor[W*3];
 118
 119 char *data_dir;
 120 extern char *optarg;
 121 extern int optind, opterr, optopt;
 122
 123 #define TO_TICKS(seconds) ((seconds)*20*opt_gamespeed)
 124
 125 // ************************************* FUNCS
 126
 127 void
 128 init_engine_dots() {
 129         int i;
 130         for(i = 0; i<MAXENGINEDOTS; i++) {
 131                 edot[i].active = 0;
 132         }
 133 }
 134
 135 void
 136 new_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s)
 137 {
 138         int x,y,endcount;
 139         uint16_t *pixel,c;
 140         uint32_t colorkey;
 141         int row_inc;
 142         double theta,r;
 143         int begin_generate;
 144
 145         begin_generate = SDL_GetTicks();
 146         pixel = s->pixels;
 147         row_inc = s->pitch/sizeof(uint16_t) - s->w;
 148         colorkey = s->format->colorkey;
 149
 150         SDL_LockSurface(s);
 151
 152         endcount = 0;
 153         while (endcount<3) {
 154                 pixel = s->pixels;
 155                 for(y=0; y<s->h; y++) {
 156                         for(x = 0; x<s->w; x++) {
 157                                 c = *pixel++;
 158                                 if(c && c != colorkey) {
 159                                         theta = frnd()*M_PI*2;
 160                                         r = frnd(); r = 1 - r*r;
 161                                         // r = 1 - frnd()*frnd();
 162
 163                                         bdot[bd2].dx = 45*r*cos(theta) + dx;
 164                                         bdot[bd2].dy = 45*r*sin(theta) + dy;
 165                                         bdot[bd2].x = x + xbang;
 166                                         bdot[bd2].y = y + ybang;
 167                                         bdot[bd2].c = 0;
 168                                         bdot[bd2].life = 100;
 169                                         bdot[bd2].decay = frnd()*3 + 1;
 170                                         bdot[bd2].active = 1;
 171
 172                                         // Replace the last few bang dots with the pixels from the exploding object
 173                                         if(endcount>0) bdot[bd2].c = c;
 174
 175                                         bd2 = (bd2+1) % MAXBANGDOTS;
 176                                 }
 177                                 pixel += row_inc;
 178                         }
 179                 }
 180                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 181         }
 182
 183         SDL_UnlockSurface(s);
 184 }
 185
 186 void
 187 draw_bang_dots(SDL_Surface *s)
 188 {
 189         int i;
 190         int first_i, last_i;
 191         uint16_t *pixels, *pixel, c;
 192         int row_inc = s->pitch/sizeof(uint16_t);
 193
 194         pixels = (uint16_t *) s->pixels;
 195         first_i = -1;
 196         last_i = 0;
 197
 198         for(i=0; i<MAXBANGDOTS; i++) {
 199                 if(!bdot[i].active) continue;
 200
 201                 // decrement life and maybe kill
 202                 bdot[i].life -= bdot[i].decay;
 203                 if(bdot[i].life<0) { bdot[i].active = 0; continue; }
 204
 205                 // move and clip
 206                 bdot[i].x += (bdot[i].dx - screendx)*t_frame;
 207                 bdot[i].y += (bdot[i].dy - screendy)*t_frame;
 208                 if(bdot[i].x < 0 || bdot[i].x >= XSIZE || bdot[i].y < 0 || bdot[i].y >= YSIZE) {
 209                         bdot[i].active = 0;
 210                         continue;
 211                 }
 212
 213                 // check collisions
 214                 if(pixel_collides(bdot[i].x, bdot[i].y)) { bdot[i].active = 0; continue; }
 215
 216                 pixel = pixels + row_inc*(int)(bdot[i].y) + (int)(bdot[i].x);
 217                 if(bdot[i].c) c = bdot[i].c; else c = heatcolor[(int)(bdot[i].life)*3];
 218                 *pixel = c;
 219         }
 220 }
 221
 222
 223 void
 224 new_engine_dots(int n, int dir) {
 225         int i;
 226         float a, r;  // angle, random length
 227         float dx, dy;
 228         float hx, hy; // half ship width/height.
 229         static const int s[4] = { 2, 1, 0, 1 };
 230
 231         hx = ship.image->w / 2;
 232         hy = ship.image->h / 2;
 233
 234         for(i = 0; i<n; i++) {
 235                 if(dotptr->active == 0) {
 236                         a = frnd()*M_PI + (dir-1)*M_PI_2;
 237                         r = sin(frnd()*M_PI);
 238                         dx = r * cos(a);
 239                         dy = r * -sin(a);  // screen y is "backwards".
 240
 241                         dotptr->active = 1;
 242                         dotptr->x = ship.x + s[dir]*hx + (frnd()-0.5)*3;
 243                         dotptr->y = ship.y + s[(dir+1)&3]*hy + (frnd()-0.5)*3;
 244                         if(dir&1) {
 245                                 dotptr->dx = ship.dx + 2*dx;
 246                                 dotptr->dy = ship.dy + 20*dy;
 247                                 dotptr->life = 60 * fabs(dy);
 248                         } else {
 249                                 dotptr->dx = ship.dx + 20*dx;
 250                                 dotptr->dy = ship.dy + 2*dy;
 251                                 dotptr->life = 60 * fabs(dx);
 252                         }
 253
 254                         if(dotptr - edot < MAXENGINEDOTS-1) dotptr++;
 255                         else dotptr = edot;
 256                 }
 257         }
 258 }
 259
 260 void
 261 draw_engine_dots(SDL_Surface *s) {
 262         int i;
 263         uint16_t c;
 264         uint16_t *pixels = (uint16_t *) s->pixels;
 265         int row_inc = s->pitch/sizeof(uint16_t);
 266         int heatindex;
 267         Sprite *hit;
 268
 269         for(i = 0; i<MAXENGINEDOTS; i++) {
 270                 if(!edot[i].active) continue;
 271                 edot[i].x += (edot[i].dx - screendx)*t_frame;
 272                 edot[i].y += (edot[i].dy - screendy)*t_frame;
 273                 edot[i].life -= t_frame*3;
 274                 if(edot[i].life < 0
 275                                 || edot[i].x<0 || edot[i].x >= XSIZE
 276                                 || edot[i].y<0 || edot[i].y >= YSIZE) {
 277                         edot[i].active = 0;
 278                         continue;
 279                 }
 280                 // check collisions
 281                 if((hit = pixel_collides(edot[i].x, edot[i].y))) {
 282                         if(hit->type != SHIP) { // they shouldn't hit the ship, but they do
 283                                 edot[i].active = 0;
 284                                 hit->dx += ENGINE_DOT_WEIGHT * edot[i].life * edot[i].dx / sprite_mass(hit);
 285                                 hit->dy += ENGINE_DOT_WEIGHT * edot[i].life * edot[i].dy / sprite_mass(hit);
 286                                 continue;
 287                         }
 288                 }
 289                 heatindex = edot[i].life * 6;
 290                 c = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 291                 pixels[row_inc*(int)(edot[i].y) + (int)(edot[i].x)] = c;
 292         }
 293 }
 294
 295 void
 296 drawdots(SDL_Surface *s) {
 297         int m;
 298
 299         // Create engine dots out the side we're moving from
 300         for(m = 0; m<4; m++) {
 301                 if(ship.jets & 1<<m) { // 'jets' is a bit field
 302                         new_engine_dots(80,m);
 303                 }
 304         }
 305
 306         move_dust();
 307
 308         SDL_LockSurface(s);
 309         draw_dust(s);
 310         draw_engine_dots(s);
 311         draw_bang_dots(s);
 312         SDL_UnlockSurface(s);
 313 }
 314
 315 SDL_Surface *
 316 load_image(char *filename)
 317 {
 318         SDL_Surface *tmp, *img = NULL;
 319         char *s = add_data_path(filename);
 320         if(s) {
 321                 tmp = IMG_Load(s);
 322                 free(s);
 323                 if(tmp) {
 324                         img = SDL_DisplayFormat(tmp);
 325                         SDL_FreeSurface(tmp);
 326                 }
 327         }
 328         return img;
 329 }
 330
 331 void
 332 load_ship(void)
 333 {
 334         load_sprite(SPRITE(&ship), "sprites/ship.png");
 335 }
 336
 337 int
 338 init(void) {
 339
 340         int i;
 341         char *s;
 342         Uint32 flag;
 343
 344         // Where are our data files?
 345         if(!find_files()) exit(1);
 346         read_high_score_table();
 347
 348         if(opt_sound) {
 349                 // Initialize SDL with audio and video
 350                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 351                         opt_sound = 0;
 352                         fputs("Can't open sound, starting without it\n", stderr);
 353                         atexit(SDL_Quit);
 354                 } else {
 355                         atexit(SDL_Quit);
 356                         atexit(SDL_CloseAudio);
 357                         opt_sound = init_sound();
 358                 }
 359         } else {
 360                 // Initialize with video only
 361                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 362                 atexit(SDL_Quit);
 363         }
 364
 365         play_tune(TUNE_TITLE_PAGE);
 366
 367         // Attempt to get the required video size
 368         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 369         if(opt_fullscreen) flag |= SDL_FULLSCREEN;
 370         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 371
 372         // Set the title bar text
 373         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 374
 375         NULLERROR(surf_screen);
 376
 377         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 378         for(i = 0; i<W*3; i++) {
 379                 heatcolor[i] = SDL_MapRGB(
 380                         surf_screen->format,
 381                         (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?
 382                 );
 383         }
 384
 385         // Load the banners
 386         NULLERROR(surf_b_variations = load_image("banners/variations.png"));
 387         NULLERROR(surf_b_on = load_image("banners/on.png"));
 388         NULLERROR(surf_b_rockdodger = load_image("banners/rockdodger.png"));
 389
 390         NULLERROR(surf_b_game = load_image("banners/game.png"));
 391         NULLERROR(surf_b_over = load_image("banners/over.png"));
 392
 393         // Load the life indicator (small ship) graphic.
 394         NULLERROR(surf_life = load_image("indicators/life.png"));
 395
 396         // Load the font image
 397         s = add_data_path(BIG_FONT_FILE);
 398         if(s) {
 399                 NULLERROR(surf_font_big = IMG_Load(s));
 400                 free(s);
 401                 g_font = SFont_InitFont(surf_font_big);
 402         }
 403
 404         init_engine_dots();
 405         init_dust();
 406
 407         init_sprites();
 408         add_sprite(SPRITE(&ship));
 409
 410         // Remove the mouse cursor
 411 #ifdef SDL_DISABLE
 412         SDL_ShowCursor(SDL_DISABLE);
 413 #endif
 414
 415         return 0;
 416 }
 417
 418 void
 419 show_lives(void)
 420 {
 421         int i;
 422         SDL_Rect dest;
 423
 424         for(i=0; i<ship.lives-1; i++) {
 425                 dest.x = (i + 1)*(surf_life->w + 10);
 426                 dest.y = 20;
 427                 SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 428         }
 429 }
 430
 431 void
 432 draw_game_over(void)
 433 {
 434         int x;
 435         char *text0, *text1;
 436         SDL_Rect dest;
 437         float a_game = 0, a_over = 0;
 438
 439         // fade in "GAME", then "OVER".
 440         a_game = min(1.0, faderate*fadetimer/3.0);
 441         if(a_game == 1.0) a_over = min(1.0, faderate*fadetimer/3.0 - 1);
 442
 443         fadetimer += t_frame;
 444
 445         dest.x = (XSIZE-surf_b_game->w)/2;
 446         dest.y = (YSIZE-surf_b_game->h)/2-40;
 447         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(a_game*(200 + 55*cos(fadetimer))));
 448         SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
 449
 450         dest.x = (XSIZE-surf_b_over->w)/2;
 451         dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 452         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(a_over*(200 + 55*sin(fadetimer))));
 453         SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 454
 455         if(new_high_score(score)) {
 456                 text0 = "New High Score!";
 457                 text1 = "Press SPACE to continue";
 458         } else {
 459                 text0 = msgs[g_easy][0];
 460                 text1 = msgs[g_easy][1];
 461         }
 462
 463         x = (XSIZE-SFont_TextWidth(g_font,text0))/2 + cos(fadetimer/9)*10;
 464         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/6)*5,text0);
 465
 466         x = (XSIZE-SFont_TextWidth(g_font,text1))/2 + sin(fadetimer/9)*10;
 467         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/4)*5,text1);
 468 }
 469
 470 void
 471 draw_title_page(void)
 472 {
 473         int x;
 474         char *text;
 475         SDL_Rect dest;
 476
 477         fadetimer += t_frame/2.0;
 478
 479         dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
 480         dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
 481         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer)));
 482         SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
 483
 484         dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 485         dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 486         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 487         SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
 488
 489         dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 490         dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 491         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 492         SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 493
 494         text = msgs[g_easy][(int)(fadetimer/35)%NSEQUENCE];
 495         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 496         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 497
 498         text = "Version " VERSION;
 499         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 500         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 501 }
 502
 503 void
 504 draw(void) {
 505
 506         SDL_FillRect(surf_screen,NULL,0);  // black background
 507         drawdots(surf_screen);             // background dots
 508         draw_sprite(SPRITE(&ship));
 509         draw_rocks();
 510
 511         show_lives();
 512         show_score();
 513
 514         // If it's game over, show the game over graphic in the dead centre
 515         switch (state) {
 516                 case GAME_OVER: draw_game_over(); break;
 517
 518                 case TITLE_PAGE: draw_title_page(); break;
 519
 520                 case HIGH_SCORE_ENTRY:
 521                         play_tune(TUNE_HIGH_SCORE_ENTRY);
 522                         if(!process_score_input()) {  // done inputting name
 523
 524                                 // Change state to briefly show high scores page
 525                                 state = HIGH_SCORE_DISPLAY;
 526                                 state_timeout = 200;
 527
 528                                 // Write the high score table to the file
 529                                 write_high_score_table();
 530
 531                                 play_tune(TUNE_TITLE_PAGE);
 532                         }
 533                 // FALL THROUGH TO
 534                 case HIGH_SCORE_DISPLAY:
 535                         // Display de list o high scores mon.
 536                         display_scores(surf_screen, 150,50);
 537                         break;
 538                 case GAMEPLAY:
 539                 case DEAD_PAUSE:
 540                         ; // no action necessary
 541         }
 542
 543         collisions();
 544
 545         ms_frame = SDL_GetTicks() - ms_end;
 546         ms_end += ms_frame;
 547         t_frame = opt_gamespeed * ms_frame / 50;
 548         if(state == GAMEPLAY) score += ms_frame;
 549
 550         // Update the surface
 551         SDL_Flip(surf_screen);
 552 }
 553
 554 static inline void
 555 kill_ship(Sprite *ship)
 556 {
 557         ship->flags = MOVE;
 558         // ship->flags = MOVE|DRAW;  // FADE SHIP
 559         // SDL_SetAlpha(ship->image, SDL_SRCALPHA, 0); // FADE SHIP
 560         bang = true;
 561 }
 562
 563 void
 564 do_collision(Sprite *a, Sprite *b)
 565 {
 566         if(a->type == SHIP) kill_ship(a);
 567         else if (b->type == SHIP) kill_ship(b);
 568         else bounce(a, b);
 569 }
 570
 571 void
 572 init_score_entry(void)
 573 {
 574         SDL_Event e;
 575         state = HIGH_SCORE_ENTRY;
 576         state_timeout = 5.0e6;
 577         SDL_EnableUNICODE(1);
 578         while(SDL_PollEvent(&e))
 579                 ;
 580         insert_score(score);
 581 }
 582
 583 void
 584 gameloop() {
 585         Uint8 *keystate = SDL_GetKeyState(NULL);
 586         float tmp;
 587
 588
 589         for(;;) {
 590                 SDL_PumpEvents();
 591                 keystate = SDL_GetKeyState(NULL);
 592
 593                 if(!paused) {
 594                         // Count down the game loop timer, and change state when it gets to zero or less;
 595
 596                         if((state_timeout -= t_frame*3) < 0) {
 597                                 switch(state) {
 598                                         case DEAD_PAUSE:
 599                                                 // Restore the ship and continue playing
 600                                                 ship.flags = DRAW|MOVE|COLLIDE;
 601                                                 state = GAMEPLAY;
 602                                                 play_tune(TUNE_GAMEPLAY);
 603                                                 break;
 604                                         case GAME_OVER:
 605                                                 if(new_high_score(score)) init_score_entry();
 606                                                 else {
 607                                                         state = HIGH_SCORE_DISPLAY;
 608                                                         state_timeout = 400;
 609                                                 }
 610                                                 break;
 611                                         case HIGH_SCORE_DISPLAY:
 612                                                 state = TITLE_PAGE;
 613                                                 state_timeout = 600.0;
 614                                                 fadetimer = 0.0;
 615                                                 break;
 616                                         case HIGH_SCORE_ENTRY:
 617                                                 break;
 618                                         case TITLE_PAGE:
 619                                                 state = HIGH_SCORE_DISPLAY;
 620                                                 state_timeout = 200.0;
 621                                                 break;
 622                                         case GAMEPLAY:
 623                                                 ; // no action necessary
 624                                 }
 625                         } else {
 626                                 if(state == DEAD_PAUSE) {
 627                                         float blast_radius;
 628                                         // float alpha;  // FADE SHIP
 629                                         if(state_timeout >= DEAD_PAUSE_LENGTH - 20.0) {
 630                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 631                                                 blast_rocks(bangx, bangy, blast_radius);
 632                                         }
 633
 634                                         if(bangx < 60) bangx = 60;
 635
 636                                         // FADE SHIP
 637                                         // alpha = 255.0 * (DEAD_PAUSE_LENGTH - state_timeout) / DEAD_PAUSE_LENGTH;
 638                                         // SDL_SetAlpha(ship.image, SDL_SRCALPHA, (uint8_t)alpha);
 639                                 }
 640                         }
 641
 642                         new_rocks();
 643
 644                         // SCROLLING
 645                         tmp = (ship.y+ship.dy*t_frame-YSCROLLTO)/25 + (ship.dy-screendy);
 646                         screendy += tmp * t_frame/12;
 647                         tmp = (ship.x+ship.dx*t_frame-XSCROLLTO)/25 + (ship.dx-screendx);
 648                         screendx += tmp * t_frame/12;
 649                         // taper off so we don't hit the barrier abruptly.
 650                         // (if we would hit in < 2 seconds, adjust to 2 seconds).
 651                         if(back_dist + (screendx - SCREENDXMIN)*TO_TICKS(2) < 0)
 652                                 screendx = SCREENDXMIN - (back_dist/TO_TICKS(2));
 653                         back_dist += (screendx - SCREENDXMIN)*t_frame;
 654                         if(opt_max_lead >= 0) back_dist = min(back_dist, opt_max_lead);
 655
 656                         // move bang center
 657                         bangx += (bangdx - screendx)*t_frame;
 658                         bangy += (bangdy - screendy)*t_frame;
 659
 660                         move_sprites();
 661
 662
 663                         // BOUNCE off left or right edge of screen
 664                         if(ship.x < 0 || ship.x+ship.w > XSIZE) {
 665                                 ship.x -= (ship.dx-screendx)*t_frame;
 666                                 ship.dx = screendx - (ship.dx-screendx)*opt_bounciness;
 667                         }
 668
 669                         // BOUNCE off top or bottom of screen
 670                         if(ship.y < 0 || ship.y+ship.h > YSIZE) {
 671                                 ship.y -= (ship.dy-screendy)*t_frame;
 672                                 ship.dy = screendy - (ship.dy-screendy)*opt_bounciness;
 673                         }
 674
 675                         draw();
 676
 677                         if(state == GAMEPLAY && bang) {
 678                                 // Died
 679                                 bang = false;
 680                                 play_sound(SOUND_BANG); // Play the explosion sound
 681                                 bangx = ship.x; bangy = ship.y; bangdx = ship.dx; bangdy = ship.dy;
 682                                 new_bang_dots(ship.x,ship.y,ship.dx,ship.dy,ship.image);
 683
 684                                 if(--ship.lives) {
 685                                         state = DEAD_PAUSE;
 686                                         state_timeout = DEAD_PAUSE_LENGTH;
 687                                         ship.dx = (ship.dx < 0) ? -sqrt(-ship.dx) : sqrt(ship.dx);
 688                                         ship.dy = (ship.dy < 0) ? -sqrt(-ship.dy) : sqrt(ship.dy);
 689                                         if(ship.dx < SCREENDXMIN) ship.dx = SCREENDXMIN;
 690                                 } else {
 691                                         state = GAME_OVER;
 692                                         ship.dx = SCREENDXMIN; ship.dy = 0;
 693                                         state_timeout = 200.0;
 694                                         fadetimer = 0.0;
 695                                         faderate = t_frame;
 696                                 }
 697                         }
 698
 699                         // new game
 700                         if((keystate[SDLK_SPACE] || keystate[SDLK_e] || keystate[SDLK_n])
 701                            && (state == HIGH_SCORE_DISPLAY
 702                                || state == TITLE_PAGE
 703                                || state == GAME_OVER)) {
 704                                 if(state == GAME_OVER && new_high_score(score))
 705                                         init_score_entry();
 706                                 else {
 707                                         if((keystate[SDLK_SPACE] && !initial_rocks) || keystate[SDLK_n]) {
 708                                                 g_easy = 0;
 709                                                 initial_rocks = NORMAL_I_ROCKS;
 710                                                 final_rocks = NORMAL_F_ROCKS;
 711                                                 if(opt_gamespeed == EASY_GAMESPEED)
 712                                                         opt_gamespeed = NORMAL_GAMESPEED;
 713                                         } else if(keystate[SDLK_e]) {
 714                                                 g_easy = 1;
 715                                                 initial_rocks = EASY_I_ROCKS;
 716                                                 final_rocks = EASY_F_ROCKS;
 717                                                 opt_gamespeed = EASY_GAMESPEED;
 718                                         }
 719                                         reset_sprites();
 720                                         reset_rocks();
 721                                         screendx = SCREENDXMIN; screendy = 0;
 722
 723                                         ship.x = XSIZE/2.2; ship.y = YSIZE/2;
 724                                         ship.dx = screendx; ship.dy = screendy;
 725                                         ship.lives = 4;
 726                                         ship.flags = MOVE|DRAW|COLLIDE;
 727                                         // SDL_SetAlpha(ship.image, SDL_SRCALPHA, SDL_ALPHA_OPAQUE);  // FADE SHIP
 728                                         add_sprite(SPRITE(&ship));
 729
 730                                         score = 0;
 731
 732                                         state = GAMEPLAY;
 733                                         play_tune(TUNE_GAMEPLAY);
 734                                 }
 735                         }
 736
 737                         ship.jets = 0;
 738                 }
 739
 740                 if(state == GAMEPLAY) {
 741                         if(!paused) {
 742                                 if(keystate[SDLK_LEFT]  | keystate[SDLK_h]) { ship.dx -= 1.5*t_frame; ship.jets |= 1<<0;}
 743                                 if(keystate[SDLK_DOWN]  | keystate[SDLK_t]) { ship.dy += 1.5*t_frame; ship.jets |= 1<<1;}
 744                                 if(keystate[SDLK_RIGHT] | keystate[SDLK_n]) { ship.dx += 1.5*t_frame; ship.jets |= 1<<2;}
 745                                 if(keystate[SDLK_UP]    | keystate[SDLK_c]) { ship.dy -= 1.5*t_frame; ship.jets |= 1<<3;}
 746                                 if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 747                         }
 748
 749                         if(keystate[SDLK_p] | keystate[SDLK_s]) {
 750                                 if(!pausedown) {
 751                                         paused = !paused;
 752                                         pausedown = 1;
 753                                         if(!paused) ms_end = SDL_GetTicks();
 754                                 }
 755                         } else {
 756                                 pausedown = 0;
 757                         }
 758                 }
 759
 760                 if(state == TITLE_PAGE && keystate[SDLK_h]) {
 761                         state = HIGH_SCORE_DISPLAY;
 762                         state_timeout = 400;
 763                 }
 764
 765                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE]))
 766                         return;
 767
 768         }
 769 }
 770
 771 int
 772 main(int argc, char **argv) {
 773         init_opts();
 774         argp_parse(&argp, argc, argv, 0, 0, 0);
 775
 776         if(init()) {
 777                 printf ("ta: '%s'\n",initerror);
 778                 return 1;
 779         }
 780
 781         gameloop();
 782
 783         return 0;
 784 }