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 #undef DEBUG
  23
  24 #include "config.h"
  25 #include "file.h"
  26 #include "score.h"
  27 #include "sound.h"
  28
  29 #include <math.h>
  30 #include <SDL/SDL.h>
  31 #include <SDL/SDL_image.h>
  32 #include <stdarg.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <unistd.h>
  37
  38 #include "SFont.h"
  39
  40 #define CONDERROR(a) if((a)) {initerror = strdup(SDL_GetError());return 1;}
  41 #define NULLERROR(a) CONDERROR((a) == NULL)
  42
  43 // ************************************* STRUCTS
  44 struct rock_struct {
  45         // Array of black pixel coordinates. This is scanned
  46         // every frame to see if it's still black, and as
  47         // soon as it isn't we BLOW UP
  48         float x,y,dx,dy;
  49         int active;
  50         int dead;  // has been blown out of the way
  51                    // to make room for a new ship appearing.
  52         SDL_Surface *image;
  53         int type_number;
  54 };
  55 struct black_point_struct {
  56         int x,y;
  57 };
  58 struct bangdots {
  59         // Bang dots have the same colour as shield dots.
  60         // Bang dots get darker as they age.
  61         // Some are coloured the same as the ex-ship.
  62         float x,y,dx,dy;
  63         Uint16 c; // when zero, use heatcolor[bangdotlife]
  64         float life;     // When reduced to 0, set active = 0
  65         int active;
  66         float decay;// Amount by which to reduce life each time dot is drawn
  67 };
  68 struct enginedots {
  69         // Engine dots stream out the back of the ship, getting darker as they go.
  70         int active;
  71         float x,y,dx,dy;
  72         // The life of an engine dot
  73         // is a number starting at between 0 and 50 and counting backward.
  74         float life;     // When reduced to 0, set active = 0
  75 };
  76 struct spacedot {
  77         // Space dots are harmless background items
  78         // All are active. When one falls off the edge, another is created at the start.
  79         float x,y,dx;
  80         Uint16 color;
  81 };
  82
  83 // ************************************* VARS
  84 // SDL_Surface global variables
  85 SDL_Surface
  86         *surf_screen,   // Screen
  87         *surf_b_variations, // "variations" banner
  88         *surf_b_on, // "on" banner
  89         *surf_b_rockdodger, // "rockdodger" banner
  90         *surf_b_game,   // Title element "game"
  91         *surf_b_over,   // Title element "over"
  92         *surf_ship,             // Spaceship element
  93         *surf_life,     // Indicator of number of ships remaining
  94         *surf_rock[NROCKS],     // THE ROCKS
  95         *surf_deadrock[NROCKS], // THE DEAD ROCKS
  96         *surf_font_big; // The big font
  97
  98 SFont_Font *g_font;
  99
 100 // Structure global variables
 101 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
 102 struct rock_struct rock[MAXROCKS], *rockptr = rock;
 103 struct black_point_struct black_point[MAXBLACKPOINTS], *blackptr = black_point;
 104 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
 105 struct spacedot sdot[MAXSPACEDOTS];
 106
 107 // Other global variables
 108 char topline[1024];
 109 char *initerror = "";
 110
 111 float shipx,shipy = 240.0;      // X position, 0..XSIZE
 112 float shipdx,shipdy;    // Change in X position per tick.
 113 float rockrate,rockspeed;
 114 float movementrate;  // this controls the speed of everything that moves.
 115 float yscroll;
 116 float scrollvel;
 117
 118 int nships,score,initticks,ticks_since_last, last_ticks;
 119 int gameover;
 120 int countdown = 0;
 121 int maneuver = 0;
 122 int sound_flag = 1, music_flag = 0;
 123 int tail_plume = 0; // display big engine at the back?
 124 int friction = 0;       // should there be friction?
 125 float fadetimer = 0, faderate;
 126
 127 int pausedown = 0, paused = 0;
 128
 129 // bangdot start (bd1) and end (bd2) position:
 130 int bd1 = 0, bd2 = 0;
 131
 132 enum states {
 133         TITLE_PAGE,
 134         GAMEPLAY,
 135         DEAD_PAUSE,
 136         GAME_OVER,
 137         HIGH_SCORE_ENTRY,
 138         HIGH_SCORE_DISPLAY
 139 };
 140 enum states state = TITLE_PAGE;
 141 float state_timeout = 600.0;
 142
 143 #define NSEQUENCE 2
 144 char *sequence[] = {
 145         "Press SPACE to start",
 146         "http://qualdan.com/vor/"
 147 };
 148
 149 int bangdotlife, nbangdots;
 150 Uint16 heatcolor[W*3];
 151
 152 char *data_dir;
 153 extern char *optarg;
 154 extern int optind, opterr, optopt;
 155
 156 float dist_sq(float x1, float y1, float x2, float y2)
 157 {
 158         return (x2-x1)*(x2-x1) + (y2-y1)*(y2-y1);
 159 }
 160
 161 // ************************************* FUNCS
 162
 163 float
 164 rnd() {
 165         return (float)random()/(float)RAND_MAX;
 166 }
 167
 168 void
 169 init_engine_dots() {
 170         int i;
 171         for(i = 0; i<MAXENGINEDOTS; i++) {
 172                 edot[i].active = 0;
 173         }
 174 }
 175
 176 void
 177 init_space_dots() {
 178         int i,intensity;
 179         for(i = 0; i<MAXSPACEDOTS; i++) {
 180                 float r;
 181
 182                 sdot[i].x = rnd()*(XSIZE-5);
 183                 sdot[i].y = rnd()*(YSIZE-5);
 184
 185                 r = rnd()*rnd();
 186
 187                 sdot[i].dx = -r*4;
 188                 // -1/((1-r) + .3);
 189                 intensity = (int)(r*180 + 70);
 190                 sdot[i].color = SDL_MapRGB(surf_screen->format,intensity,intensity,intensity);
 191
 192         }
 193 }
 194
 195 void
 196 makebangdots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
 197
 198         // TODO - stop generating dots after a certain amount of time has passed, to cope with slower CPUs.
 199         // TODO - generate and display dots in a circular buffer
 200
 201         int x,y,endcount;
 202         Uint16 *rawpixel,c;
 203         double theta,r;
 204         int begin_generate;
 205
 206         begin_generate = SDL_GetTicks();
 207
 208         SDL_LockSurface(s);
 209         rawpixel = (Uint16 *) s->pixels;
 210
 211         //for(n = 0; n <= power/2; n++) {
 212
 213         endcount = 0;
 214         while (endcount<3) {
 215                 for(x = 0; x<s->w; x++) {
 216                         for(y = 0; y<s->h; y++) {
 217                                 c = rawpixel[s->pitch/2*y + x];
 218                                 if(c && c != SDL_MapRGB(s->format,0,255,0)) {
 219
 220                                         theta = rnd()*M_PI*2;
 221
 222                                         r = 1-(rnd()*rnd());
 223
 224                                         bdot[bd2].dx = (power/50.0)*45.0*cos(theta)*r + dx;
 225                                         bdot[bd2].dy = (power/50.0)*45.0*sin(theta)*r + dy;
 226                                         bdot[bd2].x = x + xbang;
 227                                         bdot[bd2].y = y + ybang;
 228
 229                                         // Replace the last few bang dots with the pixels from the exploding object
 230                                         bdot[bd2].c = (endcount>0)?c:0;
 231                                         bdot[bd2].life = 100;
 232                                         bdot[bd2].decay = rnd()*3 + 1;
 233                                         bdot[bd2].active = 1;
 234
 235                                         bd2++;
 236                                         bd2 %= MAXBANGDOTS;
 237
 238                                         // If the circular buffer is filled, who cares? They've had their chance.
 239                                         //if(bd2 == bd1-1) goto exitloop;
 240
 241                                 }
 242                         }
 243                 }
 244
 245                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 246         }
 247
 248         SDL_UnlockSurface(s);
 249
 250 }
 251
 252 void
 253 draw_bang_dots(SDL_Surface *s) {
 254         int i;
 255         int first_i, last_i;
 256         Uint16 *rawpixel;
 257         rawpixel = (Uint16 *) s->pixels;
 258
 259         first_i = -1;
 260
 261         for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 262
 263                 i %= MAXBANGDOTS;
 264
 265                 if(bdot[i].x <= 0 || bdot[i].x >= XSIZE || bdot[i].y <= 0 || bdot[i].y >= YSIZE) {
 266                         // If the dot has drifted outside the perimeter, kill it
 267                         bdot[i].active = 0;
 268                 }
 269
 270                 if(bdot[i].active) {
 271                         if(first_i < 0)
 272                         first_i = i;
 273                         //last_i = i + 1;
 274                         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)];
 275                         bdot[i].life -= bdot[i].decay;
 276                         bdot[i].x += bdot[i].dx*movementrate;
 277                         bdot[i].y += bdot[i].dy*movementrate + yscroll;
 278
 279                         if(bdot[i].life<0)
 280                         bdot[i].active = 0;
 281                 }
 282         }
 283
 284         if(first_i >= 0) {
 285                 bd1 = first_i;
 286                 bd2 = last_i;
 287         }
 288         else {
 289                 bd1 = 0;
 290                 bd2 = 0;
 291         }
 292
 293 }
 294
 295
 296 void
 297 draw_space_dots(SDL_Surface *s) {
 298         int i;
 299         Uint16 *rawpixel;
 300         rawpixel = (Uint16 *) s->pixels;
 301
 302         for(i = 0; i<MAXSPACEDOTS; i++) {
 303                 if(sdot[i].y<0) {
 304                         sdot[i].y = 0;
 305                 }
 306                 rawpixel[(int)(s->pitch/2*(int)sdot[i].y) + (int)(sdot[i].x)] = sdot[i].color;
 307                 sdot[i].x += sdot[i].dx*movementrate;
 308                 sdot[i].y += yscroll;
 309                 if(sdot[i].y > YSIZE) {
 310                         sdot[i].y -= YSIZE;
 311                 } else if(sdot[i].y < 0) {
 312                         sdot[i].y += YSIZE;
 313                 }
 314                 if(sdot[i].x<0) {
 315                         sdot[i].x = XSIZE;
 316                 }
 317         }
 318 }
 319
 320 void
 321 draw_engine_dots(SDL_Surface *s) {
 322         int i;
 323         Uint16 *rawpixel;
 324         rawpixel = (Uint16 *) s->pixels;
 325
 326         for(i = 0; i<MAXENGINEDOTS; i++) {
 327                 if(edot[i].active) {
 328                         edot[i].x += edot[i].dx*movementrate;
 329                         edot[i].y += edot[i].dy*movementrate + yscroll;
 330                         if((edot[i].life -= movementrate*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
 331                                 edot[i].active = 0;
 332                         } else if(edot[i].x<0 || edot[i].x>XSIZE) {
 333                                 edot[i].active = 0;
 334                         } else {
 335                                 int heatindex;
 336                                 heatindex = edot[i].life * 6;
 337                                 //rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = lifecolor[(int)(edot[i].life)];
 338                                 rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 339                         }
 340                 }
 341         }
 342 }
 343
 344 void
 345 create_engine_dots(int newdots) {
 346         int i;
 347         double theta,r,dx,dy;
 348
 349         if(!tail_plume) return;
 350
 351         if(state == GAMEPLAY) {
 352                 for(i = 0; i<newdots*movementrate; i++) {
 353                         if(dotptr->active == 0) {
 354                                 theta = rnd()*M_PI*2;
 355                                 r = rnd();
 356                                 dx = cos(theta)*r;
 357                                 dy = sin(theta)*r;
 358
 359                                 dotptr->active = 1;
 360                                 dotptr->x = shipx + surf_ship->w/2-14;
 361                                 dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*5-1;
 362                                 dotptr->dx = 10*(dx-1.5) + shipdx;
 363                                 dotptr->dy = 1*dy + shipdy;
 364                                 dotptr->life = 45 + rnd(1)*5;
 365
 366                                 dotptr++;
 367                                 if(dotptr-edot >= MAXENGINEDOTS) {
 368                                         dotptr = edot;
 369                                 }
 370                         }
 371                 }
 372         }
 373 }
 374
 375 void
 376 create_engine_dots2(int newdots, int m) {
 377         int i;
 378         double theta, theta2, dx, dy, adx, ady;
 379
 380         // Don't create fresh engine dots when
 381         // the game is not being played and a demo is not beng shown
 382         if(state != GAMEPLAY) return;
 383
 384         for(i = 0; i<newdots; i++) {
 385                 if(dotptr->active == 0) {
 386                         theta = rnd()*M_PI*2;
 387                         theta2 = rnd()*M_PI*2;
 388
 389                         dx = cos(theta) * fabs(cos(theta2));
 390                         dy = sin(theta) * fabs(cos(theta2));
 391                         adx = fabs(dx);
 392                         ady = fabs(dy);
 393
 394
 395                         dotptr->active = 1;
 396                         dotptr->x = shipx + surf_ship->w/2 + (rnd()-0.5)*3;
 397                         dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*3;
 398
 399                         switch(m) {
 400                                 case 0:
 401                                         dotptr->x -= 14;
 402                                         dotptr->dx = -20*adx + shipdx;
 403                                         dotptr->dy = 2*dy + shipdy;
 404                                         dotptr->life = 60 * adx;
 405                                 break;
 406                                 case 1:
 407                                         dotptr->dx = 2*dx + shipdx;
 408                                         dotptr->dy = -20*ady + shipdy;
 409                                         dotptr->life = 60 * ady;
 410                                 break;
 411                                 case 2:
 412                                         dotptr->x += 14;
 413                                         dotptr->dx = 20*adx + shipdx;
 414                                         dotptr->dy = 2*dy + shipdy;
 415                                         dotptr->life = 60 * adx;
 416                                 break;
 417                                 case 3:
 418                                         dotptr->dx = 2*dx + shipdx;
 419                                         dotptr->dy = 20*ady + shipdy;
 420                                         dotptr->life = 60 * ady;
 421                                 break;
 422                         }
 423                         dotptr++;
 424                         if(dotptr-edot >= MAXENGINEDOTS) {
 425                                 dotptr = edot;
 426                         }
 427                 }
 428         }
 429 }
 430
 431 void
 432 drawdots(SDL_Surface *s) {
 433         int m;
 434
 435         SDL_LockSurface(s);
 436         // Draw the background stars aka space dots
 437         draw_space_dots(s);
 438
 439         // Draw the score when playing the game or whn the game is freshly over
 440         if(1 || state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER ) {
 441                 SDL_UnlockSurface(s);
 442
 443                 snprintscore_line(topline, 50, score);
 444                 SFont_Write(s,g_font,XSIZE-250,0,topline);
 445
 446                 SDL_LockSurface(s);
 447         }
 448
 449         // Draw all the engine dots
 450         draw_engine_dots(s);
 451
 452         // Create more engine dots comin out da back
 453         if(!gameover) create_engine_dots(200);
 454
 455         // Create engine dots out the side we're moving from
 456         for(m = 0; m<4; m++) {
 457                 if(maneuver & 1<<m) { // 'maneuver' is a bit field
 458                         create_engine_dots2(80,m);
 459                 }
 460         }
 461
 462         // Draw all outstanding bang dots
 463         //if(bangdotlife-- > 0)
 464         draw_bang_dots(s);
 465
 466         SDL_UnlockSurface(s);
 467 }
 468
 469 int
 470 init(int fullscreen) {
 471
 472         int i,j;
 473         SDL_Surface *temp;
 474         Uint16 *raw_pixels;
 475         Uint32 flag;
 476
 477         // Where are our data files?
 478         if(!find_files()) exit(1);
 479         read_high_score_table();
 480
 481         if(sound_flag) {
 482                 // Initialize SDL with audio and video
 483                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 484                         sound_flag = 0;
 485                         printf ("Can't open sound, starting without it\n");
 486                         atexit(SDL_Quit);
 487                 } else {
 488                         atexit(SDL_Quit);
 489                         atexit(SDL_CloseAudio);
 490                         sound_flag = init_sound();
 491                 }
 492         } else {
 493                 // Initialize with video only
 494                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 495                 atexit(SDL_Quit);
 496         }
 497
 498         play_tune(0);
 499
 500         // Attempt to get the required video size
 501         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 502         if(fullscreen) flag |= SDL_FULLSCREEN;
 503         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 504
 505         // Set the title bar text
 506         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 507
 508         NULLERROR(surf_screen);
 509
 510         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 511         for(i = 0; i<W*3; i++) {
 512                 heatcolor[i] = SDL_MapRGB(
 513                         surf_screen->format,
 514                         (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?
 515                 );
 516         }
 517
 518         // Load the banners
 519         NULLERROR(temp = IMG_Load(add_path("banners/variations.png")));
 520         NULLERROR(surf_b_variations = SDL_DisplayFormat(temp));
 521
 522         NULLERROR(temp = IMG_Load(add_path("banners/on.png")));
 523         NULLERROR(surf_b_on = SDL_DisplayFormat(temp));
 524
 525         NULLERROR(temp = IMG_Load(add_path("banners/rockdodger.png")));
 526         NULLERROR(surf_b_rockdodger = SDL_DisplayFormat(temp));
 527
 528         NULLERROR(temp = IMG_Load(add_path("banners/game.png")));
 529         NULLERROR(surf_b_game = SDL_DisplayFormat(temp));
 530
 531         NULLERROR(temp = IMG_Load(add_path("banners/over.png")));
 532         NULLERROR(surf_b_over = SDL_DisplayFormat(temp));
 533
 534         surf_font_big = IMG_Load(add_path(BIG_FONT_FILE));
 535         g_font = SFont_InitFont(surf_font_big);
 536
 537         // Load the spaceship graphic.
 538         NULLERROR(temp = IMG_Load(add_path("sprites/ship.png")));
 539         NULLERROR(surf_ship = SDL_DisplayFormat(temp));
 540
 541         // Load the life indicator (small ship) graphic.
 542         NULLERROR(temp = IMG_Load(add_path("indicators/life.png")));
 543         NULLERROR(surf_life = SDL_DisplayFormat(temp));
 544
 545         // Create the array of black points;
 546         SDL_LockSurface(surf_ship);
 547         raw_pixels = (Uint16 *) surf_ship->pixels;
 548         for(i = 0; i<surf_ship->w; i++) {
 549                 for(j = 0; j<surf_ship->h; j++) {
 550                         if(raw_pixels[j*(surf_ship->pitch)/2 + i] == 0) {
 551                                 blackptr->x = i;
 552                                 blackptr->y = j;
 553                                 blackptr++;
 554                         }
 555                 }
 556         }
 557
 558         SDL_UnlockSurface(surf_ship);
 559
 560         init_engine_dots();
 561         init_space_dots();
 562
 563         // Load all our lovely rocks
 564         for(i = 0; i<NROCKS; i++) {
 565                 char a[100];
 566
 567                 sprintf(a,add_path("sprites/rock%d.png"),i);
 568                 NULLERROR(temp = IMG_Load(a));
 569                 NULLERROR(surf_rock[i] = SDL_DisplayFormat(temp));
 570
 571                 sprintf(a,add_path("sprites/deadrock%d.png"),i);
 572                 NULLERROR(temp = IMG_Load(a));
 573                 NULLERROR(surf_deadrock[i] = SDL_DisplayFormat(temp));
 574         }
 575
 576         // Remove the mouse cursor
 577 #ifdef SDL_DISABLE
 578         SDL_ShowCursor(SDL_DISABLE);
 579 #endif
 580
 581         return 0;
 582 }
 583
 584 int
 585 draw() {
 586         int i;
 587         SDL_Rect src,dest;
 588         struct black_point_struct *p;
 589         Uint16 *raw_pixels;
 590         int bang, offset, x;
 591         char *text;
 592         float fadegame,fadeover;
 593
 594         bang = 0;
 595
 596         src.x = 0;
 597         src.y = 0;
 598         dest.x = 0;
 599         dest.y = 0;
 600
 601         // Draw a fully black background
 602         SDL_FillRect(surf_screen,NULL,0);
 603
 604         // Draw the background dots
 605         drawdots(surf_screen);
 606
 607         // Draw ship
 608         if(!gameover && state == GAMEPLAY ) {
 609                 src.w = surf_ship->w;
 610                 src.h = surf_ship->h;
 611                 dest.w = src.w;
 612                 dest.h = src.h;
 613                 dest.x = (int)shipx;
 614                 dest.y = (int)shipy;
 615                 SDL_BlitSurface(surf_ship,&src,surf_screen,&dest);
 616         }
 617
 618         // Draw all the rocks, in all states
 619         for(i = 0; i<MAXROCKS; i++) {
 620                 if(rock[i].active) {
 621
 622                         src.w = rock[i].image->w;
 623                         src.h = rock[i].image->h;
 624                         dest.w = src.w;
 625                         dest.h = src.h;
 626                         dest.x = (int) rock[i].x;
 627                         dest.y = (int) rock[i].y;
 628
 629                         // Draw the rock
 630                         SDL_BlitSurface(rock[i].image,&src,surf_screen,&dest);
 631
 632                 }
 633         }
 634
 635         // If it's game over, show the game over graphic in the dead centre
 636         switch (state) {
 637                 case GAME_OVER:
 638                         if(fadetimer<3.0/faderate) {
 639                                 fadegame = fadetimer/(3.0/faderate);
 640                         } else {
 641                                 fadegame = 1.0;
 642                         }
 643
 644                         if(fadetimer<3.0/faderate) {
 645                                 fadeover = 0.0;
 646                         } else if(fadetimer<6.0/faderate) {
 647                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 648                         } else {
 649                                 fadeover = 1.0;
 650                         }
 651
 652                         src.w = surf_b_game->w;
 653                         src.h = surf_b_game->h;
 654                         dest.w = src.w;
 655                         dest.h = src.h;
 656                         dest.x = (XSIZE-src.w)/2;
 657                         dest.y = (YSIZE-src.h)/2-40;
 658                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += movementrate/1.0))));
 659                         SDL_BlitSurface(surf_b_game,&src,surf_screen,&dest);
 660
 661                         src.w = surf_b_over->w;
 662                         src.h = surf_b_over->h;
 663                         dest.w = src.w;
 664                         dest.h = src.h;
 665                         dest.x = (XSIZE-src.w)/2;
 666                         dest.y = (YSIZE-src.h)/2 + 40;
 667                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 668                         SDL_BlitSurface(surf_b_over,&src,surf_screen,&dest);
 669                 break;
 670
 671                 case TITLE_PAGE:
 672
 673                         src.w = surf_b_variations->w;
 674                         src.h = surf_b_variations->h;
 675                         dest.w = src.w;
 676                         dest.h = src.h;
 677                         dest.x = (XSIZE-src.w)/2 + cos(fadetimer/6.5)*10;
 678                         dest.y = (YSIZE/2-src.h)/2 + sin(fadetimer/5.0)*10;
 679                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += movementrate/2.0)));
 680                         SDL_BlitSurface(surf_b_variations,&src,surf_screen,&dest);
 681
 682                         src.w = surf_b_on->w;
 683                         src.h = surf_b_on->h;
 684                         dest.w = src.w;
 685                         dest.h = src.h;
 686                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 687                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 688                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 689                         SDL_BlitSurface(surf_b_on,&src,surf_screen,&dest);
 690
 691                         src.w = surf_b_rockdodger->w;
 692                         src.h = surf_b_rockdodger->h;
 693                         dest.w = src.w;
 694                         dest.h = src.h;
 695                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 696                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 697                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 698                         SDL_BlitSurface(surf_b_rockdodger,&src,surf_screen,&dest);
 699
 700                         text = "Version " VERSION;
 701                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 702                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 703
 704                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 705                         //text = "Press SPACE to start!";
 706                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 707                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 708                 break;
 709
 710                 case HIGH_SCORE_ENTRY:
 711                         play_tune(2);
 712                         if(!process_score_input()) {  // done inputting name
 713
 714                                 // Change state to briefly show high scores page
 715                                 state = HIGH_SCORE_DISPLAY;
 716                                 state_timeout = 200;
 717
 718                                 // Write the high score table to the file
 719                                 write_high_score_table();
 720
 721                                 // Play the title page tune
 722                                 play_tune(0);
 723                         }
 724                 // FALL THROUGH TO
 725                 case HIGH_SCORE_DISPLAY:
 726                         // Display de list o high scores mon.
 727                         display_scores(surf_screen, 150,50);
 728                 case GAMEPLAY:
 729                 case DEAD_PAUSE:
 730                         ; // no action necessary
 731         }
 732
 733         if(!gameover && state == GAMEPLAY) {
 734                 SDL_LockSurface(surf_screen);
 735                 raw_pixels = (Uint16 *) surf_screen->pixels;
 736                 // Check that the black points on the ship are
 737                 // still black, and not covered up by rocks.
 738                 for(p = black_point; p<blackptr; p++) {
 739                         offset = surf_screen->pitch/2 * (p->y + (int)shipy) + p->x + (int)shipx;
 740                         if(raw_pixels[offset]) {
 741                                 // Set the bang flag
 742                                 bang = 1;
 743                         }
 744                 }
 745                 SDL_UnlockSurface(surf_screen);
 746         }
 747
 748         // Draw all the little ships
 749         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
 750         for(i = 0; i<nships-1; i++) {
 751                 src.w = surf_life->w;
 752                 src.h = surf_life->h;
 753                 dest.w = src.w;
 754                 dest.h = src.h;
 755                 dest.x = (i + 1)*(src.w + 10);
 756                 dest.y = 20;
 757                 SDL_BlitSurface(surf_life,&src,surf_screen,&dest);
 758         }
 759
 760
 761         // Update the score
 762         /*
 763         n = SDL_GetTicks()-initticks;
 764         if(score)
 765         ticks_since_last = n-score;
 766         score = n;
 767         */
 768
 769         ticks_since_last = SDL_GetTicks()-last_ticks;
 770         last_ticks = SDL_GetTicks();
 771         if(ticks_since_last>200 || ticks_since_last<0) {
 772                 movementrate = 0;
 773         }
 774         else {
 775                 movementrate = ticks_since_last/50.0;
 776                 if(state == GAMEPLAY) {
 777                         score += ticks_since_last;
 778                 }
 779         }
 780
 781         // Update the surface
 782         SDL_Flip(surf_screen);
 783
 784
 785         return bang;
 786 }
 787
 788 int
 789 gameloop() {
 790         int i = 0;
 791         Uint8 *keystate;
 792
 793
 794         for(;;) {
 795                 if(!paused) {
 796                         // Count down the game loop timer, and change state when it gets to zero or less;
 797
 798                         if((state_timeout -= movementrate*3) < 0) {
 799                                 switch(state) {
 800                                         case DEAD_PAUSE:
 801                                                 // Create a new ship and start all over again
 802                                                 state = GAMEPLAY;
 803                                                 play_tune(1);
 804                                                 shipx -= 50;
 805                                                 break;
 806                                         case GAME_OVER:
 807                                                 state = HIGH_SCORE_ENTRY;
 808                                                 state_timeout = 5.0e6;
 809                                                 if(new_high_score(score)) {
 810                                                         SDL_Event e;
 811                                                         SDL_EnableUNICODE(1);
 812                                                         while(SDL_PollEvent(&e))
 813                                                                 ;
 814                                                 } else {
 815                                                         state = HIGH_SCORE_DISPLAY;
 816                                                         state_timeout = 400;
 817                                                 }
 818                                                 break;
 819                                         case HIGH_SCORE_DISPLAY:
 820                                                 state = TITLE_PAGE;
 821                                                 state_timeout = 500.0;
 822                                                 break;
 823                                         case HIGH_SCORE_ENTRY:
 824                                                 // state = TITLE_PAGE;
 825                                                 // play_tune(1);
 826                                                 // state_timeout = 100.0;
 827                                                 break;
 828                                         case TITLE_PAGE:
 829                                                 state = HIGH_SCORE_DISPLAY;
 830                                                 state_timeout = 200.0;
 831                                                 break;
 832                                         case GAMEPLAY:
 833                                                 ; // no action necessary
 834                                 }
 835                         } else {
 836                                 if(state == DEAD_PAUSE) {
 837                                         float blast_radius = BLAST_RADIUS * state_timeout / 20.0;
 838                                         if(shipx < 60) shipx = 60;
 839                                         for(i = 0; i<MAXROCKS; i++ ) {
 840                                                 float dx, dy, n;
 841                                                 if(rock[i].x <= 0) continue;
 842                                                 dx = rock[i].x - shipx;
 843                                                 dy = rock[i].y - shipy;
 844                                                 n = sqrt(dx*dx + dy*dy);
 845                                                 if(n < blast_radius) {
 846                                                         n *= 20;
 847                                                         rock[i].dx += rockrate*(dx+30)/n;
 848                                                         rock[i].dy += rockrate*dy/n;
 849                                                         rock[i].dead = 1;
 850                                                 }
 851                                         }
 852                                 }
 853                         }
 854
 855                         if(--countdown <= 0 && (rnd()*100.0<(rockrate += 0.025))) {
 856                                 // Create a rock
 857                                 rockptr++;
 858                                 if(rockptr-rock >= MAXROCKS) {
 859                                         rockptr = rock;
 860                                 }
 861                                 if(!rockptr->active) {
 862                                         rockptr->x = (float)XSIZE;
 863                                         rockptr->dx = -(rockspeed)*(1 + rnd());
 864                                         rockptr->dy = rnd()-0.5;
 865                                         rockptr->type_number = random() % NROCKS;
 866                                         rockptr->image = surf_rock[rockptr->type_number];// [random()%NROCKS];
 867                                         rockptr->active = 1;
 868                                         rockptr->y = rnd()*(YSIZE + rockptr->image->h);
 869                                 }
 870                                 if(movementrate>0.1) {
 871                                         countdown = (int)(ROCKRATE/movementrate);
 872                                 } else {
 873                                         countdown = 0;
 874                                 }
 875                         }
 876
 877                         // FRICTION?
 878                         if(friction) {
 879                                 shipdx *= pow((double)0.9,(double)movementrate);
 880                                 shipdy *= pow((double)0.9,(double)movementrate);
 881                                 // if(abs(shipdx)<0.00001) shipdx = 0;
 882                                 // if(abs(shipdy)<0.00001) shipdy = 0;
 883                         }
 884
 885                         // INERTIA
 886                         shipx += shipdx*movementrate;
 887                         shipy += shipdy*movementrate;
 888
 889                         // SCROLLING
 890                         yscroll = shipy - (YSIZE / 2);
 891                         yscroll += shipdy * 25;
 892                         yscroll /= -25;
 893                         yscroll = ((scrollvel * (12 - movementrate)) + (yscroll * movementrate)) / 12;
 894                         scrollvel = yscroll;
 895                         yscroll = yscroll*movementrate;
 896                         shipy += yscroll;
 897
 898                         // Move all the rocks
 899                         for(i = 0; i < MAXROCKS; i++) {
 900                                 if(rock[i].active) {
 901                                         rock[i].x += rock[i].dx*movementrate;
 902                                         rock[i].y += rock[i].dy*movementrate + yscroll;
 903                                         if(rock[i].y > YSIZE || rock[i].y < -rock[i].image->h) {
 904                                                 if(rock[i].dead) {
 905                                                         rock[i].dead = 0;
 906                                                         rock[i].active = 0;
 907                                                 } else {
 908                                                         // wrap
 909                                                         rock[i].y = (YSIZE - rock[i].image->h) - rock[i].y;
 910                                                         rock[i].y += (rock[i].dy*movementrate + yscroll) * 1.01;
 911                                                 }
 912                                         }
 913                                         if(rock[i].x < -rock[i].image->w || rock[i].x > XSIZE) {
 914                                                 rock[i].active = 0;
 915                                                 rock[i].dead = 0;
 916                                         }
 917                                 }
 918                         }
 919
 920
 921                         // BOUNCE X
 922                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 923                                 // BOUNCE from left and right wall
 924                                 shipx -= shipdx*movementrate;
 925                                 shipdx *= -0.99;
 926                         }
 927
 928                         // BOUNCE Y
 929                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 930                                 // BOUNCE from top and bottom wall
 931                                 shipy -= shipdy;
 932                                 shipdy *= -0.99;
 933                         }
 934
 935
 936                         if(draw() && state == GAMEPLAY) {
 937                                 // Play the explosion sound
 938                                 play_sound(0);
 939                                 makebangdots(shipx,shipy,shipdx,shipdy,surf_ship,30);
 940                                 if(--nships <= 0) {
 941                                         gameover = 1;
 942                                         state = GAME_OVER;
 943                                         state_timeout = 200.0;
 944                                         fadetimer = 0.0;
 945                                         faderate = movementrate;
 946                                 }
 947                                 else {
 948                                         state = DEAD_PAUSE;
 949                                         state_timeout = 20.0;
 950                                         shipdx = 0;
 951                                         shipdy = 0;
 952                                 }
 953                         }
 954
 955                         SDL_PumpEvents();
 956                         keystate = SDL_GetKeyState(NULL);
 957
 958                         if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 959                                 return 0;
 960                         }
 961
 962                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 963
 964                                 for(i = 0; i<MAXROCKS; i++ ) {
 965                                         rock[i].active = 0;
 966                                         rock[i].dead = 0;
 967                                 }
 968
 969                                 rockrate = 54.0;
 970                                 rockspeed = 5.0;
 971
 972                                 nships = 4;
 973                                 score = 0;
 974
 975                                 state = GAMEPLAY;
 976                                 play_tune(1);
 977
 978                                 gameover = 0;
 979                                 shipx = 0;
 980                                 shipy = YSIZE/2;
 981                                 shipdx = -1;
 982                                 shipdy = 0;
 983                         }
 984
 985                         maneuver = 0;
 986                 } else {
 987                         SDL_PumpEvents();
 988                         keystate = SDL_GetKeyState(NULL);
 989                 }
 990
 991                 if(state == GAMEPLAY) {
 992                         if(!gameover) {
 993
 994                                 if(!paused) {
 995                                         if(keystate[SDLK_UP] | keystate[SDLK_c])                { shipdy -= 1.5*movementrate; maneuver |= 1<<3;}
 996                                         if(keystate[SDLK_DOWN] | keystate[SDLK_t])              { shipdy += 1.5*movementrate; maneuver |= 1<<1;}
 997                                         if(keystate[SDLK_LEFT] | keystate[SDLK_h])              { shipdx -= 1.5*movementrate; maneuver |= 1<<2;}
 998                                         if(keystate[SDLK_RIGHT] | keystate[SDLK_n])             { shipdx += 1.5*movementrate; maneuver |= 1;}
 999                                         if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
1000                                 }
1001
1002                                 if(keystate[SDLK_p] | keystate[SDLK_s]) {
1003                                         if(!pausedown) {
1004                                                 paused = !paused;
1005                                                 if(paused) {
1006                                                         SDL_Rect src,dest;
1007                                                         src.w = surf_b_variations->w;
1008                                                         src.h = surf_b_variations->h;
1009                                                         dest.w = src.w;
1010                                                         dest.h = src.h;
1011                                                         dest.x = (XSIZE-src.w)/2;
1012                                                         dest.y = (YSIZE-src.h)/2;
1013                                                         SDL_BlitSurface(surf_b_variations,&src,surf_screen,&dest);
1014                                                         // Update the surface
1015                                                         SDL_Flip(surf_screen);
1016                                                 }
1017                                                 pausedown = 1;
1018                                         }
1019                                 } else {
1020                                         pausedown = 0;
1021                                 }
1022
1023                         }
1024                         else {
1025                                 paused = 0;
1026                                 pausedown = 0;
1027                         }
1028                 } else if(state == GAME_OVER) {
1029                         if(keystate[SDLK_SPACE]) {
1030                                 state_timeout = -1;
1031                         }
1032                 }
1033         }
1034 }
1035
1036 int
1037 main(int argc, char **argv) {
1038         int i, x, fullscreen;
1039
1040         fullscreen = 0;
1041         tail_plume = 0;
1042         friction = 0;
1043         sound_flag = 1;
1044         music_flag = 0;
1045
1046         while ((x = getopt(argc,argv,"efhmps")) >= 0) {
1047                 switch(x) {
1048                         case 'e': // engine
1049                                 tail_plume = 1;
1050                         break;
1051                         case 'f': // fullscreen
1052                                 fullscreen = 1;
1053                         break;
1054                         case 'h': // help
1055                                 printf("Variations on RockDodger\n"
1056                                        " -e big tail [E]ngine\n"
1057                                        " -f [F]ull screen\n"
1058                                        " -h this [H]elp message\n"
1059                                        " -m enable [M]usic\n"
1060                                        " -p original [P]hysics (friction)\n"
1061                                        " -s [S]ilent (no sound)\n");
1062                                 exit(0);
1063                         break;
1064                         case 'm': // music
1065                                 music_flag = 1;
1066                         case 'p': // physics
1067                                 friction = 1;
1068                         break;
1069                         case 's': // silent
1070                                 sound_flag = 0;
1071                                 music_flag = 0;
1072                         break;
1073                 }
1074         }
1075
1076         if(init(fullscreen)) {
1077                 printf ("ta: '%s'\n",initerror);
1078                 return 1;
1079         }
1080
1081         for(i = 0; i<MAXROCKS; i++) {
1082                 rock[i].active = 0;
1083                 rock[i].dead = 0;
1084         }
1085         rockrate = 54.0;
1086         rockspeed = 5.0;
1087         initticks = SDL_GetTicks();
1088         gameloop();
1089
1090         return 0;
1091 }