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