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 #ifdef DEBUG
  23 #include "debug.h"
  24 #endif
  25
  26 #include "config.h"
  27 #include "file.h"
  28 #include "globals.h"
  29 #include "rocks.h"
  30 #include "score.h"
  31 #include "shape.h"
  32 #include "sound.h"
  33
  34 #include <math.h>
  35 #include <SDL/SDL.h>
  36 #include <SDL/SDL_image.h>
  37 #include <stdarg.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 #include "SFont.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_speed, // Speed indicator
  57         *surf_rock[NROCKS],     // THE ROCKS
  58         *surf_font_big; // The big font
  59
  60
  61 SFont_Font *g_font;
  62
  63 // Structure global variables
  64 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
  65 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
  66 struct spacedot sdot[MAXSPACEDOTS];
  67
  68 // Other global variables
  69 char topline[1024];
  70 char *initerror = "";
  71
  72 struct shape shipshape;
  73 float shipx = XSIZE/2, shipy = YSIZE/2; // X position, 0..XSIZE
  74 float shipdx = 8, shipdy = 0;   // Change in X position per tick.
  75 float screendx = 7.5, screendy = 0.0;
  76 float xscroll, yscroll;
  77 float gamerate;  // this controls the speed of everything that moves.
  78
  79 float bangx, bangy, bangdx, bangdy;
  80
  81 float game_dist, avg_speed, cur_speed;
  82 uint16_t avg_speed_w, cur_speed_w; // [0, 74]
  83
  84 int nships,score,game_ticks,ticks_since_last,last_ticks;
  85 int gameover;
  86 int maneuver = 0;
  87 int sound_flag, music_flag;
  88 int tail_plume; // display big engine at the back?
  89 int friction;   // should there be friction?
  90 float fadetimer = 0, faderate;
  91
  92 int pausedown = 0, paused = 0;
  93
  94 // bangdot start (bd1) and end (bd2) position:
  95 int bd1 = 0, bd2 = 0;
  96
  97 enum states {
  98         TITLE_PAGE,
  99         GAMEPLAY,
 100         DEAD_PAUSE,
 101         GAME_OVER,
 102         HIGH_SCORE_ENTRY,
 103         HIGH_SCORE_DISPLAY
 104 };
 105 enum states state = TITLE_PAGE;
 106 float state_timeout = 600.0;
 107
 108 #define NSEQUENCE 2
 109 char *sequence[] = {
 110         "Press SPACE to start",
 111         "http://qualdan.com/vor/"
 112 };
 113
 114 int bangdotlife, nbangdots;
 115 Uint16 heatcolor[W*3];
 116
 117 char *data_dir;
 118 extern char *optarg;
 119 extern int optind, opterr, optopt;
 120
 121 // ************************************* FUNCS
 122
 123 float
 124 rnd() {
 125         return (float)random()/(float)RAND_MAX;
 126 }
 127
 128 void
 129 init_engine_dots() {
 130         int i;
 131         for(i = 0; i<MAXENGINEDOTS; i++) {
 132                 edot[i].active = 0;
 133         }
 134 }
 135
 136 void
 137 init_space_dots() {
 138         int i,b;
 139         for(i = 0; i<MAXSPACEDOTS; i++) {
 140                 sdot[i].x = rnd()*(XSIZE-5);
 141                 sdot[i].y = rnd()*(YSIZE-5);
 142                 sdot[i].z = MAXDUSTDEPTH*sqrt(rnd());
 143                 b = (MAXDUSTDEPTH - sdot[i].z) * 255.0 / MAXDUSTDEPTH;
 144                 sdot[i].color = SDL_MapRGB(surf_screen->format, b, b, b);
 145         }
 146 }
 147
 148 void
 149 make_bang_dots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
 150
 151         // TODO - stop generating dots after a certain amount of time has passed, to cope with slower CPUs.
 152         // TODO - generate and display dots in a circular buffer
 153
 154         int x,y,endcount;
 155         Uint16 *rawpixel,c;
 156         double theta,r;
 157         int begin_generate;
 158
 159         begin_generate = SDL_GetTicks();
 160
 161         SDL_LockSurface(s);
 162         rawpixel = (Uint16 *) s->pixels;
 163
 164         //for(n = 0; n <= power/2; n++) {
 165
 166         endcount = 0;
 167         while (endcount<3) {
 168                 for(x = 0; x<s->w; x++) {
 169                         for(y = 0; y<s->h; y++) {
 170                                 c = rawpixel[s->pitch/2*y + x];
 171                                 if(c && c != s->format->colorkey) {
 172
 173                                         theta = rnd()*M_PI*2;
 174
 175                                         r = 1-(rnd()*rnd());
 176
 177                                         bdot[bd2].dx = (power/50.0)*45.0*cos(theta)*r + dx;
 178                                         bdot[bd2].dy = (power/50.0)*45.0*sin(theta)*r + dy;
 179                                         bdot[bd2].x = x + xbang;
 180                                         bdot[bd2].y = y + ybang;
 181
 182                                         // Replace the last few bang dots with the pixels from the exploding object
 183                                         bdot[bd2].c = (endcount>0)?c:0;
 184                                         bdot[bd2].life = 100;
 185                                         bdot[bd2].decay = rnd()*3 + 1;
 186                                         bdot[bd2].active = 1;
 187
 188                                         bd2++;
 189                                         bd2 %= MAXBANGDOTS;
 190
 191                                         // If the circular buffer is filled, who cares? They've had their chance.
 192                                         //if(bd2 == bd1-1) goto exitloop;
 193
 194                                 }
 195                         }
 196                 }
 197
 198                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 199         }
 200
 201         SDL_UnlockSurface(s);
 202
 203 }
 204
 205 void
 206 draw_bang_dots(SDL_Surface *s) {
 207         int i;
 208         int first_i, last_i;
 209         Uint16 *rawpixel;
 210         rawpixel = (Uint16 *) s->pixels;
 211
 212         first_i = -1;
 213         last_i = 0;
 214
 215         for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 216
 217                 i %= MAXBANGDOTS;
 218
 219                 if(bdot[i].x <= 0 || bdot[i].x >= XSIZE || bdot[i].y <= 0 || bdot[i].y >= YSIZE) {
 220                         // If the dot has drifted outside the perimeter, kill it
 221                         bdot[i].active = 0;
 222                 }
 223
 224                 if(bdot[i].active) {
 225                         if(first_i < 0)
 226                         first_i = i;
 227                         //last_i = i + 1;
 228                         rawpixel[(int)(s->pitch/2*(int)(bdot[i].y)) + (int)(bdot[i].x)] = bdot[i].c ? bdot[i].c : heatcolor[(int)(bdot[i].life*3)];
 229                         bdot[i].life -= bdot[i].decay;
 230                         bdot[i].x += bdot[i].dx*gamerate - xscroll;
 231                         bdot[i].y += bdot[i].dy*gamerate - yscroll;
 232
 233                         if(bdot[i].life<0)
 234                         bdot[i].active = 0;
 235                 }
 236         }
 237
 238         if(first_i >= 0) {
 239                 bd1 = first_i;
 240                 bd2 = last_i;
 241         }
 242         else {
 243                 bd1 = 0;
 244                 bd2 = 0;
 245         }
 246
 247 }
 248
 249
 250 void
 251 draw_space_dots(SDL_Surface *s) {
 252         int i;
 253         Uint16 *rawpixel;
 254         rawpixel = (Uint16 *) s->pixels;
 255
 256         for(i = 0; i<MAXSPACEDOTS; i++) {
 257                 if(sdot[i].y<0) {
 258                         sdot[i].y = 0;
 259                 }
 260                 rawpixel[(int)(s->pitch/2*(int)sdot[i].y) + (int)(sdot[i].x)] = sdot[i].color;
 261                 sdot[i].x -= xscroll / (1.3 + sdot[i].z);
 262                 sdot[i].y -= yscroll / (1.3 + sdot[i].z);
 263                 if(sdot[i].y >= XSIZE) sdot[i].x -= XSIZE;
 264                 else if(sdot[i].x < 0) sdot[i].x = XSIZE-1;
 265                 if(sdot[i].y > YSIZE) sdot[i].y -= YSIZE;
 266                 else if(sdot[i].y < 0) sdot[i].y += YSIZE-1;
 267         }
 268 }
 269
 270 void
 271 draw_engine_dots(SDL_Surface *s) {
 272         int i;
 273         Uint16 *rawpixel;
 274         rawpixel = (Uint16 *) s->pixels;
 275
 276         for(i = 0; i<MAXENGINEDOTS; i++) {
 277                 if(edot[i].active) {
 278                         edot[i].x += edot[i].dx*gamerate - xscroll;
 279                         edot[i].y += edot[i].dy*gamerate - yscroll;
 280                         if((edot[i].life -= gamerate*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
 281                                 edot[i].active = 0;
 282                         } else if(edot[i].x<0 || edot[i].x>XSIZE) {
 283                                 edot[i].active = 0;
 284                         } else {
 285                                 int heatindex;
 286                                 heatindex = edot[i].life * 6;
 287                                 //rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = lifecolor[(int)(edot[i].life)];
 288                                 rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 289                         }
 290                 }
 291         }
 292 }
 293
 294 void
 295 create_engine_dots(int newdots) {
 296         int i;
 297         double theta,r,dx,dy;
 298
 299         if(!tail_plume) return;
 300
 301         if(state == GAMEPLAY) {
 302                 for(i = 0; i<newdots*gamerate; i++) {
 303                         if(dotptr->active == 0) {
 304                                 theta = rnd()*M_PI*2;
 305                                 r = rnd();
 306                                 dx = cos(theta)*r;
 307                                 dy = sin(theta)*r;
 308
 309                                 dotptr->active = 1;
 310                                 dotptr->x = shipx + surf_ship->w/2-14;
 311                                 dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*5-1;
 312                                 dotptr->dx = 10*(dx-1.5) + shipdx;
 313                                 dotptr->dy = 1*dy + shipdy;
 314                                 dotptr->life = 45 + rnd(1)*5;
 315
 316                                 dotptr++;
 317                                 if(dotptr-edot >= MAXENGINEDOTS) {
 318                                         dotptr = edot;
 319                                 }
 320                         }
 321                 }
 322         }
 323 }
 324
 325 void
 326 create_engine_dots2(int newdots, int m) {
 327         int i;
 328         double theta, theta2, dx, dy, adx, ady;
 329
 330         // Don't create fresh engine dots when
 331         // the game is not being played and a demo is not beng shown
 332         if(state != GAMEPLAY) return;
 333
 334         for(i = 0; i<newdots; i++) {
 335                 if(dotptr->active == 0) {
 336                         theta = rnd()*M_PI*2;
 337                         theta2 = rnd()*M_PI*2;
 338
 339                         dx = cos(theta) * fabs(cos(theta2));
 340                         dy = sin(theta) * fabs(cos(theta2));
 341                         adx = fabs(dx);
 342                         ady = fabs(dy);
 343
 344
 345                         dotptr->active = 1;
 346                         dotptr->x = shipx + surf_ship->w/2 + (rnd()-0.5)*3;
 347                         dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*3;
 348
 349                         switch(m) {
 350                                 case 0:
 351                                         dotptr->x -= 14;
 352                                         dotptr->dx = -20*adx + shipdx;
 353                                         dotptr->dy = 2*dy + shipdy;
 354                                         dotptr->life = 60 * adx;
 355                                 break;
 356                                 case 1:
 357                                         dotptr->dx = 2*dx + shipdx;
 358                                         dotptr->dy = -20*ady + shipdy;
 359                                         dotptr->life = 60 * ady;
 360                                 break;
 361                                 case 2:
 362                                         dotptr->x += 14;
 363                                         dotptr->dx = 20*adx + shipdx;
 364                                         dotptr->dy = 2*dy + shipdy;
 365                                         dotptr->life = 60 * adx;
 366                                 break;
 367                                 case 3:
 368                                         dotptr->dx = 2*dx + shipdx;
 369                                         dotptr->dy = 20*ady + shipdy;
 370                                         dotptr->life = 60 * ady;
 371                                 break;
 372                         }
 373                         dotptr++;
 374                         if(dotptr-edot >= MAXENGINEDOTS) {
 375                                 dotptr = edot;
 376                         }
 377                 }
 378         }
 379 }
 380
 381 void
 382 drawdots(SDL_Surface *s) {
 383         int m;
 384
 385         // Create more engine dots comin' out da back
 386         if(!gameover) create_engine_dots(200);
 387
 388         // Create engine dots out the side we're moving from
 389         for(m = 0; m<4; m++) {
 390                 if(maneuver & 1<<m) { // 'maneuver' is a bit field
 391                         create_engine_dots2(80,m);
 392                 }
 393         }
 394
 395         SDL_LockSurface(s);
 396         draw_space_dots(s);
 397         draw_engine_dots(s);
 398         draw_bang_dots(s);
 399         SDL_UnlockSurface(s);
 400 }
 401
 402 int
 403 init(int fullscreen) {
 404
 405         int i;
 406         SDL_Surface *temp;
 407         Uint32 flag;
 408
 409         // Where are our data files?
 410         if(!find_files()) exit(1);
 411         read_high_score_table();
 412
 413         if(sound_flag) {
 414                 // Initialize SDL with audio and video
 415                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 416                         sound_flag = 0;
 417                         printf ("Can't open sound, starting without it\n");
 418                         atexit(SDL_Quit);
 419                 } else {
 420                         atexit(SDL_Quit);
 421                         atexit(SDL_CloseAudio);
 422                         sound_flag = init_sound();
 423                 }
 424         } else {
 425                 // Initialize with video only
 426                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 427                 atexit(SDL_Quit);
 428         }
 429
 430         play_tune(0);
 431
 432         // Attempt to get the required video size
 433         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 434         if(fullscreen) flag |= SDL_FULLSCREEN;
 435         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 436
 437         // Set the title bar text
 438         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 439
 440         NULLERROR(surf_screen);
 441
 442         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 443         for(i = 0; i<W*3; i++) {
 444                 heatcolor[i] = SDL_MapRGB(
 445                         surf_screen->format,
 446                         (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?
 447                 );
 448         }
 449
 450         // Load the banners
 451         NULLERROR(temp = IMG_Load(add_path("banners/variations.png")));
 452         NULLERROR(surf_b_variations = SDL_DisplayFormat(temp));
 453
 454         NULLERROR(temp = IMG_Load(add_path("banners/on.png")));
 455         NULLERROR(surf_b_on = SDL_DisplayFormat(temp));
 456
 457         NULLERROR(temp = IMG_Load(add_path("banners/rockdodger.png")));
 458         NULLERROR(surf_b_rockdodger = SDL_DisplayFormat(temp));
 459
 460         NULLERROR(temp = IMG_Load(add_path("banners/game.png")));
 461         NULLERROR(surf_b_game = SDL_DisplayFormat(temp));
 462
 463         NULLERROR(temp = IMG_Load(add_path("banners/over.png")));
 464         NULLERROR(surf_b_over = SDL_DisplayFormat(temp));
 465
 466         surf_font_big = IMG_Load(add_path(BIG_FONT_FILE));
 467         g_font = SFont_InitFont(surf_font_big);
 468
 469         // Load the spaceship graphic.
 470         NULLERROR(temp = IMG_Load(add_path("sprites/ship.png")));
 471         NULLERROR(surf_ship = SDL_DisplayFormat(temp));
 472         get_shape(surf_ship, &shipshape);
 473
 474         // Load the life indicator (small ship) graphic.
 475         NULLERROR(temp = IMG_Load(add_path("indicators/life.png")));
 476         NULLERROR(surf_life = SDL_DisplayFormat(temp));
 477
 478         NULLERROR(temp = IMG_Load(add_path("indicators/speed.png")));
 479         NULLERROR(surf_speed = SDL_DisplayFormat(temp));
 480
 481         init_engine_dots();
 482         init_space_dots();
 483
 484         init_rocks();
 485
 486         // Remove the mouse cursor
 487 #ifdef SDL_DISABLE
 488         SDL_ShowCursor(SDL_DISABLE);
 489 #endif
 490
 491         return 0;
 492 }
 493
 494 int
 495 draw() {
 496         int i;
 497         SDL_Rect src, dest;
 498         int bang, x;
 499         char *text;
 500         float fadegame,fadeover;
 501
 502         bang = 0;
 503
 504         // Draw a fully black background
 505         SDL_FillRect(surf_screen,NULL,0);
 506
 507         // Draw the background dots
 508         drawdots(surf_screen);
 509
 510         // Draw ship
 511         if(!gameover && state == GAMEPLAY ) {
 512                 dest.x = shipx;
 513                 dest.y = shipy;
 514                 SDL_BlitSurface(surf_ship,NULL,surf_screen,&dest);
 515         }
 516
 517         draw_rocks();
 518
 519         // Draw the life indicators.
 520         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
 521         for(i = 0; i<nships-1; i++) {
 522                 dest.x = (i + 1)*(surf_life->w + 10);
 523                 dest.y = 20;
 524                 SDL_BlitSurface(surf_life, NULL, surf_screen, &dest);
 525         }
 526
 527         if(state == GAMEPLAY) {
 528                 // Update speeds.
 529                 cur_speed = shipdx;
 530                 if(shipdx < 0) cur_speed = 0;
 531                 if(shipdx > 20) cur_speed = 20;
 532                 game_dist += cur_speed*ticks_since_last;
 533                 game_ticks += ticks_since_last;
 534                 if(game_ticks < 2*1000) avg_speed = cur_speed;
 535                 else avg_speed = game_dist/game_ticks;
 536                 //printf("avg=%.2f, cur=%.2f. shipdx=%.2f\n", avg_speed, cur_speed, shipdx);
 537                 avg_speed_w = 2 + 64*avg_speed/20;
 538                 cur_speed_w = 2 + 64*cur_speed/20;
 539         }
 540
 541         if(state == GAMEPLAY || state == DEAD_PAUSE) {
 542                 // Draw the speed indicators.
 543                 src.x = 0; src.y = 0;
 544                 src.h = surf_speed->h;
 545                 dest.x = 240;
 546                 src.w = avg_speed_w; dest.y = 10;
 547                 SDL_BlitSurface(surf_speed, &src, surf_screen, &dest);
 548                 src.w = cur_speed_w; dest.y = 20;
 549                 SDL_BlitSurface(surf_speed, &src, surf_screen, &dest);
 550         }
 551
 552         // Draw the score
 553         snprintscore_line(topline, 50, score);
 554         SFont_Write(surf_screen, g_font, XSIZE-250, 0, topline);
 555
 556         // If it's game over, show the game over graphic in the dead centre
 557         switch (state) {
 558                 case GAME_OVER:
 559                         if(fadetimer<3.0/faderate) {
 560                                 fadegame = fadetimer/(3.0/faderate);
 561                         } else {
 562                                 fadegame = 1.0;
 563                         }
 564
 565                         if(fadetimer<3.0/faderate) {
 566                                 fadeover = 0.0;
 567                         } else if(fadetimer<6.0/faderate) {
 568                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 569                         } else {
 570                                 fadeover = 1.0;
 571                         }
 572
 573                         dest.x = (XSIZE-surf_b_game->w)/2;
 574                         dest.y = (YSIZE-surf_b_game->h)/2-40;
 575                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += gamerate/1.0))));
 576                         SDL_BlitSurface(surf_b_game,NULL,surf_screen,&dest);
 577
 578                         dest.x = (XSIZE-surf_b_over->w)/2;
 579                         dest.y = (YSIZE-surf_b_over->h)/2 + 40;
 580                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 581                         SDL_BlitSurface(surf_b_over,NULL,surf_screen,&dest);
 582                 break;
 583
 584                 case TITLE_PAGE:
 585
 586                         dest.x = (XSIZE-surf_b_variations->w)/2 + cos(fadetimer/6.5)*10;
 587                         dest.y = (YSIZE/2-surf_b_variations->h)/2 + sin(fadetimer/5.0)*10;
 588                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += gamerate/2.0)));
 589                         SDL_BlitSurface(surf_b_variations,NULL,surf_screen,&dest);
 590
 591                         dest.x = (XSIZE-surf_b_on->w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 592                         dest.y = (YSIZE/2-surf_b_on->h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 593                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 594                         SDL_BlitSurface(surf_b_on,NULL,surf_screen,&dest);
 595
 596                         dest.x = (XSIZE-surf_b_rockdodger->w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 597                         dest.y = (YSIZE/2-surf_b_rockdodger->h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 598                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 599                         SDL_BlitSurface(surf_b_rockdodger,NULL,surf_screen,&dest);
 600
 601                         text = "Version " VERSION;
 602                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 603                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 604
 605                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 606                         //text = "Press SPACE to start!";
 607                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 608                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 609                 break;
 610
 611                 case HIGH_SCORE_ENTRY:
 612                         play_tune(2);
 613                         if(!process_score_input()) {  // done inputting name
 614
 615                                 // Change state to briefly show high scores page
 616                                 state = HIGH_SCORE_DISPLAY;
 617                                 state_timeout = 200;
 618
 619                                 // Write the high score table to the file
 620                                 write_high_score_table();
 621
 622                                 // Play the title page tune
 623                                 play_tune(0);
 624                         }
 625                 // FALL THROUGH TO
 626                 case HIGH_SCORE_DISPLAY:
 627                         // Display de list o high scores mon.
 628                         display_scores(surf_screen, 150,50);
 629                         break;
 630                 case GAMEPLAY:
 631                 case DEAD_PAUSE:
 632                         ; // no action necessary
 633         }
 634
 635         if(!gameover && state == GAMEPLAY) {
 636                 bang = hit_rocks(shipx, shipy, &shipshape);
 637         }
 638
 639         ticks_since_last = SDL_GetTicks()-last_ticks;
 640         last_ticks = SDL_GetTicks();
 641         if(ticks_since_last>200 || ticks_since_last<0) {
 642                 gamerate = 0;
 643         }
 644         else {
 645                 gamerate = GAMESPEED*ticks_since_last/50.0;
 646                 if(state == GAMEPLAY) {
 647                         score += ticks_since_last;
 648                 }
 649         }
 650
 651         // Update the surface
 652         SDL_Flip(surf_screen);
 653
 654
 655         return bang;
 656 }
 657
 658 int
 659 gameloop() {
 660         Uint8 *keystate;
 661         float tmp;
 662
 663
 664         for(;;) {
 665                 if(!paused) {
 666                         // Count down the game loop timer, and change state when it gets to zero or less;
 667
 668                         if((state_timeout -= gamerate*3) < 0) {
 669                                 switch(state) {
 670                                         case DEAD_PAUSE:
 671                                                 // Create a new ship and start all over again
 672                                                 state = GAMEPLAY;
 673                                                 play_tune(1);
 674                                                 break;
 675                                         case GAME_OVER:
 676                                                 state = HIGH_SCORE_ENTRY;
 677                                                 state_timeout = 5.0e6;
 678                                                 if(new_high_score(score)) {
 679                                                         SDL_Event e;
 680                                                         SDL_EnableUNICODE(1);
 681                                                         while(SDL_PollEvent(&e))
 682                                                                 ;
 683                                                 } else {
 684                                                         state = HIGH_SCORE_DISPLAY;
 685                                                         state_timeout = 400;
 686                                                 }
 687                                                 break;
 688                                         case HIGH_SCORE_DISPLAY:
 689                                                 state = TITLE_PAGE;
 690                                                 state_timeout = 500.0;
 691                                                 break;
 692                                         case HIGH_SCORE_ENTRY:
 693                                                 // state = TITLE_PAGE;
 694                                                 // play_tune(1);
 695                                                 // state_timeout = 100.0;
 696                                                 break;
 697                                         case TITLE_PAGE:
 698                                                 state = HIGH_SCORE_DISPLAY;
 699                                                 state_timeout = 200.0;
 700                                                 break;
 701                                         case GAMEPLAY:
 702                                                 ; // no action necessary
 703                                 }
 704                         } else {
 705                                 if(state == DEAD_PAUSE) {
 706                                         float blast_radius;
 707                                         int fixonly;
 708
 709                                         if(state_timeout < DEAD_PAUSE_LENGTH - 20.0) {
 710                                                 blast_radius = BLAST_RADIUS * 1.3;
 711                                                 fixonly = 1;
 712                                         } else {
 713                                                 blast_radius = BLAST_RADIUS * (DEAD_PAUSE_LENGTH - state_timeout) / 20.0;
 714                                                 fixonly = 0;
 715                                         }
 716                                         blast_rocks(bangx, bangy, blast_radius, fixonly);
 717
 718                                         if(bangx < 60) bangx = 60;
 719                                 }
 720                         }
 721
 722                         new_rocks();
 723
 724                         // FRICTION?
 725                         if(friction) {
 726                                 shipdx *= pow((double)0.9,(double)gamerate);
 727                                 shipdy *= pow((double)0.9,(double)gamerate);
 728                         }
 729
 730                         // INERTIA
 731                         shipx += shipdx*gamerate;
 732                         shipy += shipdy*gamerate;
 733
 734                         // SCROLLING
 735                         tmp = shipy - (YSIZE / 2);
 736                         tmp += shipdy * 25;
 737                         tmp /= -25;
 738                         tmp = ((screendy * (gamerate - 12)) + (tmp * gamerate)) / 12;
 739                         screendy = -tmp;
 740                         tmp = shipx - (XSIZE / 3);
 741                         tmp += shipdx * 25;
 742                         tmp /= -25;
 743                         tmp = ((screendx * (gamerate - 12)) + (tmp * gamerate)) / 12;
 744                         screendx = -tmp;
 745
 746                         xscroll = screendx * gamerate;
 747                         yscroll = screendy * gamerate;
 748                         shipx -= xscroll;
 749                         shipy -= yscroll;
 750
 751                         // move bang center
 752                         bangx += bangdx*gamerate - xscroll;
 753                         bangy += bangdy*gamerate - yscroll;
 754
 755                         move_rocks();
 756
 757
 758                         // BOUNCE X
 759                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 760                                 // BOUNCE from left and right wall
 761                                 shipx -= shipdx*gamerate;
 762                                 shipdx *= -0.99;
 763                         }
 764
 765                         // BOUNCE Y
 766                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 767                                 // BOUNCE from top and bottom wall
 768                                 shipy -= shipdy;
 769                                 shipdy *= -0.99;
 770                         }
 771
 772
 773                         if(draw() && state == GAMEPLAY) {
 774                                 // Died
 775                                 play_sound(0); // Play the explosion sound
 776                                 bangx = shipx; bangy = shipy; bangdx = shipdx; bangdy = shipdy;
 777                                 make_bang_dots(shipx,shipy,shipdx,shipdy,surf_ship,30);
 778                                 shipdx *= 0.5; shipdy *= 0.5;
 779                                 if(--nships <= 0) {
 780                                         state = GAME_OVER;
 781                                         gameover = 1;
 782                                         shipdx = 8; shipdy = 0;
 783                                         state_timeout = 200.0;
 784                                         fadetimer = 0.0;
 785                                         faderate = gamerate;
 786                                 }
 787                                 else {
 788                                         state = DEAD_PAUSE;
 789                                         state_timeout = DEAD_PAUSE_LENGTH;
 790                                 }
 791                         }
 792
 793                         SDL_PumpEvents();
 794                         keystate = SDL_GetKeyState(NULL);
 795
 796                         // new game
 797                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 798
 799                                 reset_rocks();
 800
 801                                 game_ticks = 0;
 802                                 game_dist = 0;
 803
 804                                 nships = 4;
 805                                 score = 0;
 806
 807                                 state = GAMEPLAY;
 808                                 play_tune(1);
 809
 810                                 gameover = 0;
 811                                 shipx = XSIZE/2.2; shipy = YSIZE/2;
 812                                 shipdx = screendx; shipdy = screendy;
 813                         }
 814
 815                         maneuver = 0;
 816                 } else {
 817                         SDL_PumpEvents();
 818                         keystate = SDL_GetKeyState(NULL);
 819                 }
 820
 821                 if(state == GAMEPLAY) {
 822                         if(!gameover) {
 823
 824                                 if(!paused) {
 825                                         if(keystate[SDLK_UP] | keystate[SDLK_c])                { shipdy -= 1.5*gamerate; maneuver |= 1<<3;}
 826                                         if(keystate[SDLK_DOWN] | keystate[SDLK_t])              { shipdy += 1.5*gamerate; maneuver |= 1<<1;}
 827                                         if(keystate[SDLK_LEFT] | keystate[SDLK_h])              { shipdx -= 1.5*gamerate; maneuver |= 1<<2;}
 828                                         if(keystate[SDLK_RIGHT] | keystate[SDLK_n])             { shipdx += 1.5*gamerate; maneuver |= 1;}
 829                                         if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
 830                                 }
 831
 832                                 if(keystate[SDLK_p] | keystate[SDLK_s]) {
 833                                         if(!pausedown) {
 834                                                 paused = !paused;
 835                                                 pausedown = 1;
 836                                         }
 837                                 } else {
 838                                         pausedown = 0;
 839                                 }
 840
 841                         }
 842                         else {
 843                                 paused = 0;
 844                                 pausedown = 0;
 845                         }
 846                 } else if(state == GAME_OVER) {
 847                         if(keystate[SDLK_SPACE]) {
 848                                 state_timeout = -1;
 849                         }
 850                 }
 851
 852                 if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 853                         return 0;
 854                 }
 855
 856         }
 857 }
 858
 859 int
 860 main(int argc, char **argv) {
 861         int x, fullscreen;
 862
 863         fullscreen = 0;
 864         tail_plume = 0;
 865         friction = 0;
 866         sound_flag = 1;
 867         music_flag = 0;
 868
 869         while ((x = getopt(argc,argv,"efhmps")) >= 0) {
 870                 switch(x) {
 871                         case 'e': // engine
 872                                 tail_plume = 1;
 873                         break;
 874                         case 'f': // fullscreen
 875                                 fullscreen = 1;
 876                         break;
 877                         case 'h': // help
 878                                 printf("Variations on RockDodger\n"
 879                                        " -e big tail [E]ngine\n"
 880                                        " -f [F]ull screen\n"
 881                                        " -h this [H]elp message\n"
 882                                        " -m enable [M]usic\n"
 883                                        " -p original [P]hysics (friction)\n"
 884                                        " -s [S]ilent (no sound)\n");
 885                                 exit(0);
 886                         break;
 887                         case 'm': // music
 888                                 music_flag = 1;
 889                         case 'p': // physics
 890                                 friction = 1;
 891                         break;
 892                         case 's': // silent
 893                                 sound_flag = 0;
 894                                 music_flag = 0;
 895                         break;
 896                 }
 897         }
 898
 899         if(init(fullscreen)) {
 900                 printf ("ta: '%s'\n",initerror);
 901                 return 1;
 902         }
 903
 904         reset_rocks();
 905         gameloop();
 906
 907         return 0;
 908 }