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 "score.h"
  29 #include "sound.h"
  30
  31 #include <math.h>
  32 #include <SDL/SDL.h>
  33 #include <SDL/SDL_image.h>
  34 #include <stdarg.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39
  40 #include "SFont.h"
  41
  42 #define CONDERROR(a) if((a)) {initerror = strdup(SDL_GetError());return 1;}
  43 #define NULLERROR(a) CONDERROR((a) == NULL)
  44
  45 // ************************************* STRUCTS
  46 struct rock_struct {
  47         // Array of black pixel coordinates. This is scanned
  48         // every frame to see if it's still black, and as
  49         // soon as it isn't we BLOW UP
  50         float x,y,dx,dy;
  51         int active;
  52         int dead;  // has been blown out of the way
  53                    // to make room for a new ship appearing.
  54         SDL_Surface *image;
  55         int type_number;
  56 };
  57 struct black_point_struct {
  58         int x,y;
  59 };
  60 struct bangdots {
  61         // Bang dots have the same colour as shield dots.
  62         // Bang dots get darker as they age.
  63         // Some are coloured the same as the ex-ship.
  64         float x,y,dx,dy;
  65         Uint16 c; // when zero, use heatcolor[bangdotlife]
  66         float life;     // When reduced to 0, set active = 0
  67         int active;
  68         float decay;// Amount by which to reduce life each time dot is drawn
  69 };
  70 struct enginedots {
  71         // Engine dots stream out the back of the ship, getting darker as they go.
  72         int active;
  73         float x,y,dx,dy;
  74         // The life of an engine dot
  75         // is a number starting at between 0 and 50 and counting backward.
  76         float life;     // When reduced to 0, set active = 0
  77 };
  78 struct spacedot {
  79         // Space dots are harmless background items
  80         // All are active. When one falls off the edge, another is created at the start.
  81         float x,y,dx;
  82         Uint16 color;
  83 };
  84
  85 // ************************************* VARS
  86 // SDL_Surface global variables
  87 SDL_Surface
  88         *surf_screen,   // Screen
  89         *surf_b_variations, // "variations" banner
  90         *surf_b_on, // "on" banner
  91         *surf_b_rockdodger, // "rockdodger" banner
  92         *surf_b_game,   // Title element "game"
  93         *surf_b_over,   // Title element "over"
  94         *surf_ship,             // Spaceship element
  95         *surf_life,     // Indicator of number of ships remaining
  96         *surf_rock[NROCKS],     // THE ROCKS
  97         *surf_deadrock[NROCKS], // THE DEAD ROCKS
  98         *surf_font_big; // The big font
  99
 100 SFont_Font *g_font;
 101
 102 // Structure global variables
 103 struct enginedots edot[MAXENGINEDOTS], *dotptr = edot;
 104 struct rock_struct rock[MAXROCKS], *rockptr = rock;
 105 struct black_point_struct black_point[MAXBLACKPOINTS], *blackptr = black_point;
 106 struct bangdots bdot[MAXBANGDOTS], *bdotptr = bdot;
 107 struct spacedot sdot[MAXSPACEDOTS];
 108
 109 // Other global variables
 110 char topline[1024];
 111 char *initerror = "";
 112
 113 float shipx,shipy = 240.0;      // X position, 0..XSIZE
 114 float shipdx,shipdy;    // Change in X position per tick.
 115 float rockrate,rockspeed;
 116 float movementrate;  // this controls the speed of everything that moves.
 117 float yscroll;
 118 float scrollvel;
 119
 120 int nships,score,initticks,ticks_since_last, last_ticks;
 121 int gameover;
 122 int countdown = 0;
 123 int maneuver = 0;
 124 int sound_flag = 1, music_flag = 0;
 125 int tail_plume = 0; // display big engine at the back?
 126 int friction = 0;       // should there be friction?
 127 float fadetimer = 0, faderate;
 128
 129 int pausedown = 0, paused = 0;
 130
 131 // bangdot start (bd1) and end (bd2) position:
 132 int bd1 = 0, bd2 = 0;
 133
 134 enum states {
 135         TITLE_PAGE,
 136         GAMEPLAY,
 137         DEAD_PAUSE,
 138         GAME_OVER,
 139         HIGH_SCORE_ENTRY,
 140         HIGH_SCORE_DISPLAY
 141 };
 142 enum states state = TITLE_PAGE;
 143 float state_timeout = 600.0;
 144
 145 #define NSEQUENCE 2
 146 char *sequence[] = {
 147         "Press SPACE to start",
 148         "http://qualdan.com/vor/"
 149 };
 150
 151 int bangdotlife, nbangdots;
 152 Uint16 heatcolor[W*3];
 153
 154 char *data_dir;
 155 extern char *optarg;
 156 extern int optind, opterr, optopt;
 157
 158 float dist_sq(float x1, float y1, float x2, float y2)
 159 {
 160         return (x2-x1)*(x2-x1) + (y2-y1)*(y2-y1);
 161 }
 162
 163 // ************************************* FUNCS
 164
 165 float
 166 rnd() {
 167         return (float)random()/(float)RAND_MAX;
 168 }
 169
 170 void
 171 init_engine_dots() {
 172         int i;
 173         for(i = 0; i<MAXENGINEDOTS; i++) {
 174                 edot[i].active = 0;
 175         }
 176 }
 177
 178 void
 179 init_space_dots() {
 180         int i,intensity;
 181         for(i = 0; i<MAXSPACEDOTS; i++) {
 182                 float r;
 183
 184                 sdot[i].x = rnd()*(XSIZE-5);
 185                 sdot[i].y = rnd()*(YSIZE-5);
 186
 187                 r = rnd()*rnd();
 188
 189                 sdot[i].dx = -r*4;
 190                 // -1/((1-r) + .3);
 191                 intensity = (int)(r*180 + 70);
 192                 sdot[i].color = SDL_MapRGB(surf_screen->format,intensity,intensity,intensity);
 193
 194         }
 195 }
 196
 197 void
 198 makebangdots(int xbang, int ybang, int dx, int dy, SDL_Surface *s, int power) {
 199
 200         // TODO - stop generating dots after a certain amount of time has passed, to cope with slower CPUs.
 201         // TODO - generate and display dots in a circular buffer
 202
 203         int x,y,endcount;
 204         Uint16 *rawpixel,c;
 205         double theta,r;
 206         int begin_generate;
 207
 208         begin_generate = SDL_GetTicks();
 209
 210         SDL_LockSurface(s);
 211         rawpixel = (Uint16 *) s->pixels;
 212
 213         //for(n = 0; n <= power/2; n++) {
 214
 215         endcount = 0;
 216         while (endcount<3) {
 217                 for(x = 0; x<s->w; x++) {
 218                         for(y = 0; y<s->h; y++) {
 219                                 c = rawpixel[s->pitch/2*y + x];
 220                                 if(c && c != SDL_MapRGB(s->format,0,255,0)) {
 221
 222                                         theta = rnd()*M_PI*2;
 223
 224                                         r = 1-(rnd()*rnd());
 225
 226                                         bdot[bd2].dx = (power/50.0)*45.0*cos(theta)*r + dx;
 227                                         bdot[bd2].dy = (power/50.0)*45.0*sin(theta)*r + dy;
 228                                         bdot[bd2].x = x + xbang;
 229                                         bdot[bd2].y = y + ybang;
 230
 231                                         // Replace the last few bang dots with the pixels from the exploding object
 232                                         bdot[bd2].c = (endcount>0)?c:0;
 233                                         bdot[bd2].life = 100;
 234                                         bdot[bd2].decay = rnd()*3 + 1;
 235                                         bdot[bd2].active = 1;
 236
 237                                         bd2++;
 238                                         bd2 %= MAXBANGDOTS;
 239
 240                                         // If the circular buffer is filled, who cares? They've had their chance.
 241                                         //if(bd2 == bd1-1) goto exitloop;
 242
 243                                 }
 244                         }
 245                 }
 246
 247                 if(SDL_GetTicks() - begin_generate > 7) endcount++;
 248         }
 249
 250         SDL_UnlockSurface(s);
 251
 252 }
 253
 254 void
 255 draw_bang_dots(SDL_Surface *s) {
 256         int i;
 257         int first_i, last_i;
 258         Uint16 *rawpixel;
 259         rawpixel = (Uint16 *) s->pixels;
 260
 261         first_i = -1;
 262
 263         for(i = bd1; (bd1 <= bd2)?(i<bd2):(i >= bd1 && i < bd2); last_i = ++i) {
 264
 265                 i %= MAXBANGDOTS;
 266
 267                 if(bdot[i].x <= 0 || bdot[i].x >= XSIZE || bdot[i].y <= 0 || bdot[i].y >= YSIZE) {
 268                         // If the dot has drifted outside the perimeter, kill it
 269                         bdot[i].active = 0;
 270                 }
 271
 272                 if(bdot[i].active) {
 273                         if(first_i < 0)
 274                         first_i = i;
 275                         //last_i = i + 1;
 276                         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)];
 277                         bdot[i].life -= bdot[i].decay;
 278                         bdot[i].x += bdot[i].dx*movementrate;
 279                         bdot[i].y += bdot[i].dy*movementrate + yscroll;
 280
 281                         if(bdot[i].life<0)
 282                         bdot[i].active = 0;
 283                 }
 284         }
 285
 286         if(first_i >= 0) {
 287                 bd1 = first_i;
 288                 bd2 = last_i;
 289         }
 290         else {
 291                 bd1 = 0;
 292                 bd2 = 0;
 293         }
 294
 295 }
 296
 297
 298 void
 299 draw_space_dots(SDL_Surface *s) {
 300         int i;
 301         Uint16 *rawpixel;
 302         rawpixel = (Uint16 *) s->pixels;
 303
 304         for(i = 0; i<MAXSPACEDOTS; i++) {
 305                 if(sdot[i].y<0) {
 306                         sdot[i].y = 0;
 307                 }
 308                 rawpixel[(int)(s->pitch/2*(int)sdot[i].y) + (int)(sdot[i].x)] = sdot[i].color;
 309                 sdot[i].x += sdot[i].dx*movementrate;
 310                 sdot[i].y += yscroll;
 311                 if(sdot[i].y > YSIZE) {
 312                         sdot[i].y -= YSIZE;
 313                 } else if(sdot[i].y < 0) {
 314                         sdot[i].y += YSIZE;
 315                 }
 316                 if(sdot[i].x<0) {
 317                         sdot[i].x = XSIZE;
 318                 }
 319         }
 320 }
 321
 322 void
 323 draw_engine_dots(SDL_Surface *s) {
 324         int i;
 325         Uint16 *rawpixel;
 326         rawpixel = (Uint16 *) s->pixels;
 327
 328         for(i = 0; i<MAXENGINEDOTS; i++) {
 329                 if(edot[i].active) {
 330                         edot[i].x += edot[i].dx*movementrate;
 331                         edot[i].y += edot[i].dy*movementrate + yscroll;
 332                         if((edot[i].life -= movementrate*3)<0 || edot[i].y<0 || edot[i].y>YSIZE) {
 333                                 edot[i].active = 0;
 334                         } else if(edot[i].x<0 || edot[i].x>XSIZE) {
 335                                 edot[i].active = 0;
 336                         } else {
 337                                 int heatindex;
 338                                 heatindex = edot[i].life * 6;
 339                                 //rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = lifecolor[(int)(edot[i].life)];
 340                                 rawpixel[(int)(s->pitch/2*(int)(edot[i].y)) + (int)(edot[i].x)] = heatindex>3*W ? heatcolor[3*W-1] : heatcolor[heatindex];
 341                         }
 342                 }
 343         }
 344 }
 345
 346 void
 347 create_engine_dots(int newdots) {
 348         int i;
 349         double theta,r,dx,dy;
 350
 351         if(!tail_plume) return;
 352
 353         if(state == GAMEPLAY) {
 354                 for(i = 0; i<newdots*movementrate; i++) {
 355                         if(dotptr->active == 0) {
 356                                 theta = rnd()*M_PI*2;
 357                                 r = rnd();
 358                                 dx = cos(theta)*r;
 359                                 dy = sin(theta)*r;
 360
 361                                 dotptr->active = 1;
 362                                 dotptr->x = shipx + surf_ship->w/2-14;
 363                                 dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*5-1;
 364                                 dotptr->dx = 10*(dx-1.5) + shipdx;
 365                                 dotptr->dy = 1*dy + shipdy;
 366                                 dotptr->life = 45 + rnd(1)*5;
 367
 368                                 dotptr++;
 369                                 if(dotptr-edot >= MAXENGINEDOTS) {
 370                                         dotptr = edot;
 371                                 }
 372                         }
 373                 }
 374         }
 375 }
 376
 377 void
 378 create_engine_dots2(int newdots, int m) {
 379         int i;
 380         double theta, theta2, dx, dy, adx, ady;
 381
 382         // Don't create fresh engine dots when
 383         // the game is not being played and a demo is not beng shown
 384         if(state != GAMEPLAY) return;
 385
 386         for(i = 0; i<newdots; i++) {
 387                 if(dotptr->active == 0) {
 388                         theta = rnd()*M_PI*2;
 389                         theta2 = rnd()*M_PI*2;
 390
 391                         dx = cos(theta) * fabs(cos(theta2));
 392                         dy = sin(theta) * fabs(cos(theta2));
 393                         adx = fabs(dx);
 394                         ady = fabs(dy);
 395
 396
 397                         dotptr->active = 1;
 398                         dotptr->x = shipx + surf_ship->w/2 + (rnd()-0.5)*3;
 399                         dotptr->y = shipy + surf_ship->h/2 + (rnd()-0.5)*3;
 400
 401                         switch(m) {
 402                                 case 0:
 403                                         dotptr->x -= 14;
 404                                         dotptr->dx = -20*adx + shipdx;
 405                                         dotptr->dy = 2*dy + shipdy;
 406                                         dotptr->life = 60 * adx;
 407                                 break;
 408                                 case 1:
 409                                         dotptr->dx = 2*dx + shipdx;
 410                                         dotptr->dy = -20*ady + shipdy;
 411                                         dotptr->life = 60 * ady;
 412                                 break;
 413                                 case 2:
 414                                         dotptr->x += 14;
 415                                         dotptr->dx = 20*adx + shipdx;
 416                                         dotptr->dy = 2*dy + shipdy;
 417                                         dotptr->life = 60 * adx;
 418                                 break;
 419                                 case 3:
 420                                         dotptr->dx = 2*dx + shipdx;
 421                                         dotptr->dy = 20*ady + shipdy;
 422                                         dotptr->life = 60 * ady;
 423                                 break;
 424                         }
 425                         dotptr++;
 426                         if(dotptr-edot >= MAXENGINEDOTS) {
 427                                 dotptr = edot;
 428                         }
 429                 }
 430         }
 431 }
 432
 433 void
 434 drawdots(SDL_Surface *s) {
 435         int m;
 436
 437         SDL_LockSurface(s);
 438         // Draw the background stars aka space dots
 439         draw_space_dots(s);
 440
 441         // Draw the score when playing the game or whn the game is freshly over
 442         if(1 || state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER ) {
 443                 SDL_UnlockSurface(s);
 444
 445                 snprintscore_line(topline, 50, score);
 446                 SFont_Write(s,g_font,XSIZE-250,0,topline);
 447
 448                 SDL_LockSurface(s);
 449         }
 450
 451         // Draw all the engine dots
 452         draw_engine_dots(s);
 453
 454         // Create more engine dots comin out da back
 455         if(!gameover) create_engine_dots(200);
 456
 457         // Create engine dots out the side we're moving from
 458         for(m = 0; m<4; m++) {
 459                 if(maneuver & 1<<m) { // 'maneuver' is a bit field
 460                         create_engine_dots2(80,m);
 461                 }
 462         }
 463
 464         // Draw all outstanding bang dots
 465         //if(bangdotlife-- > 0)
 466         draw_bang_dots(s);
 467
 468         SDL_UnlockSurface(s);
 469 }
 470
 471 int
 472 init(int fullscreen) {
 473
 474         int i,j;
 475         SDL_Surface *temp;
 476         Uint16 *raw_pixels;
 477         Uint32 flag;
 478
 479         // Where are our data files?
 480         if(!find_files()) exit(1);
 481         read_high_score_table();
 482
 483         if(sound_flag) {
 484                 // Initialize SDL with audio and video
 485                 if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) != 0) {
 486                         sound_flag = 0;
 487                         printf ("Can't open sound, starting without it\n");
 488                         atexit(SDL_Quit);
 489                 } else {
 490                         atexit(SDL_Quit);
 491                         atexit(SDL_CloseAudio);
 492                         sound_flag = init_sound();
 493                 }
 494         } else {
 495                 // Initialize with video only
 496                 CONDERROR(SDL_Init(SDL_INIT_VIDEO) != 0);
 497                 atexit(SDL_Quit);
 498         }
 499
 500         play_tune(0);
 501
 502         // Attempt to get the required video size
 503         flag = SDL_DOUBLEBUF | SDL_HWSURFACE;
 504         if(fullscreen) flag |= SDL_FULLSCREEN;
 505         surf_screen = SDL_SetVideoMode(XSIZE,YSIZE,16,flag);
 506
 507         // Set the title bar text
 508         SDL_WM_SetCaption("Variations on Rockdodger", "VoR");
 509
 510         NULLERROR(surf_screen);
 511
 512         // Set the heat color from the range 0 (cold) to 300 (blue-white)
 513         for(i = 0; i<W*3; i++) {
 514                 heatcolor[i] = SDL_MapRGB(
 515                         surf_screen->format,
 516                         (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?
 517                 );
 518         }
 519
 520         // Load the banners
 521         NULLERROR(temp = IMG_Load(add_path("banners/variations.png")));
 522         NULLERROR(surf_b_variations = SDL_DisplayFormat(temp));
 523
 524         NULLERROR(temp = IMG_Load(add_path("banners/on.png")));
 525         NULLERROR(surf_b_on = SDL_DisplayFormat(temp));
 526
 527         NULLERROR(temp = IMG_Load(add_path("banners/rockdodger.png")));
 528         NULLERROR(surf_b_rockdodger = SDL_DisplayFormat(temp));
 529
 530         NULLERROR(temp = IMG_Load(add_path("banners/game.png")));
 531         NULLERROR(surf_b_game = SDL_DisplayFormat(temp));
 532
 533         NULLERROR(temp = IMG_Load(add_path("banners/over.png")));
 534         NULLERROR(surf_b_over = SDL_DisplayFormat(temp));
 535
 536         surf_font_big = IMG_Load(add_path(BIG_FONT_FILE));
 537         g_font = SFont_InitFont(surf_font_big);
 538
 539         // Load the spaceship graphic.
 540         NULLERROR(temp = IMG_Load(add_path("sprites/ship.png")));
 541         NULLERROR(surf_ship = SDL_DisplayFormat(temp));
 542
 543         // Load the life indicator (small ship) graphic.
 544         NULLERROR(temp = IMG_Load(add_path("indicators/life.png")));
 545         NULLERROR(surf_life = SDL_DisplayFormat(temp));
 546
 547         // Create the array of black points;
 548         SDL_LockSurface(surf_ship);
 549         raw_pixels = (Uint16 *) surf_ship->pixels;
 550         for(i = 0; i<surf_ship->w; i++) {
 551                 for(j = 0; j<surf_ship->h; j++) {
 552                         if(raw_pixels[j*(surf_ship->pitch)/2 + i] == 0) {
 553                                 blackptr->x = i;
 554                                 blackptr->y = j;
 555                                 blackptr++;
 556                         }
 557                 }
 558         }
 559
 560         SDL_UnlockSurface(surf_ship);
 561
 562         init_engine_dots();
 563         init_space_dots();
 564
 565         // Load all our lovely rocks
 566         for(i = 0; i<NROCKS; i++) {
 567                 char a[MAX_PATH_LEN];
 568
 569                 snprintf(a,MAX_PATH_LEN,add_path("sprites/rock%d.png"),i);
 570                 NULLERROR(temp = IMG_Load(a));
 571                 NULLERROR(surf_rock[i] = SDL_DisplayFormat(temp));
 572
 573                 snprintf(a,MAX_PATH_LEN,add_path("sprites/deadrock%d.png"),i);
 574                 NULLERROR(temp = IMG_Load(a));
 575                 NULLERROR(surf_deadrock[i] = SDL_DisplayFormat(temp));
 576         }
 577
 578         // Remove the mouse cursor
 579 #ifdef SDL_DISABLE
 580         SDL_ShowCursor(SDL_DISABLE);
 581 #endif
 582
 583         return 0;
 584 }
 585
 586 int
 587 draw() {
 588         int i;
 589         SDL_Rect src,dest;
 590         struct black_point_struct *p;
 591         Uint16 *raw_pixels;
 592         int bang, offset, x;
 593         char *text;
 594         float fadegame,fadeover;
 595
 596         bang = 0;
 597
 598         src.x = 0;
 599         src.y = 0;
 600         dest.x = 0;
 601         dest.y = 0;
 602
 603         // Draw a fully black background
 604         SDL_FillRect(surf_screen,NULL,0);
 605
 606         // Draw the background dots
 607         drawdots(surf_screen);
 608
 609         // Draw ship
 610         if(!gameover && state == GAMEPLAY ) {
 611                 src.w = surf_ship->w;
 612                 src.h = surf_ship->h;
 613                 dest.w = src.w;
 614                 dest.h = src.h;
 615                 dest.x = (int)shipx;
 616                 dest.y = (int)shipy;
 617                 SDL_BlitSurface(surf_ship,&src,surf_screen,&dest);
 618         }
 619
 620         // Draw all the rocks, in all states
 621         for(i = 0; i<MAXROCKS; i++) {
 622                 if(rock[i].active) {
 623
 624                         src.w = rock[i].image->w;
 625                         src.h = rock[i].image->h;
 626                         dest.w = src.w;
 627                         dest.h = src.h;
 628                         dest.x = (int) rock[i].x;
 629                         dest.y = (int) rock[i].y;
 630
 631                         // Draw the rock
 632                         SDL_BlitSurface(rock[i].image,&src,surf_screen,&dest);
 633
 634                 }
 635         }
 636
 637         // If it's game over, show the game over graphic in the dead centre
 638         switch (state) {
 639                 case GAME_OVER:
 640                         if(fadetimer<3.0/faderate) {
 641                                 fadegame = fadetimer/(3.0/faderate);
 642                         } else {
 643                                 fadegame = 1.0;
 644                         }
 645
 646                         if(fadetimer<3.0/faderate) {
 647                                 fadeover = 0.0;
 648                         } else if(fadetimer<6.0/faderate) {
 649                                 fadeover = ((3.0/faderate)-fadetimer)/(6.0/faderate);
 650                         } else {
 651                                 fadeover = 1.0;
 652                         }
 653
 654                         src.w = surf_b_game->w;
 655                         src.h = surf_b_game->h;
 656                         dest.w = src.w;
 657                         dest.h = src.h;
 658                         dest.x = (XSIZE-src.w)/2;
 659                         dest.y = (YSIZE-src.h)/2-40;
 660                         SDL_SetAlpha(surf_b_game, SDL_SRCALPHA, (int)(fadegame*(200 + 55*cos(fadetimer += movementrate/1.0))));
 661                         SDL_BlitSurface(surf_b_game,&src,surf_screen,&dest);
 662
 663                         src.w = surf_b_over->w;
 664                         src.h = surf_b_over->h;
 665                         dest.w = src.w;
 666                         dest.h = src.h;
 667                         dest.x = (XSIZE-src.w)/2;
 668                         dest.y = (YSIZE-src.h)/2 + 40;
 669                         SDL_SetAlpha(surf_b_over, SDL_SRCALPHA, (int)(fadeover*(200 + 55*sin(fadetimer))));
 670                         SDL_BlitSurface(surf_b_over,&src,surf_screen,&dest);
 671                 break;
 672
 673                 case TITLE_PAGE:
 674
 675                         src.w = surf_b_variations->w;
 676                         src.h = surf_b_variations->h;
 677                         dest.w = src.w;
 678                         dest.h = src.h;
 679                         dest.x = (XSIZE-src.w)/2 + cos(fadetimer/6.5)*10;
 680                         dest.y = (YSIZE/2-src.h)/2 + sin(fadetimer/5.0)*10;
 681                         SDL_SetAlpha(surf_b_variations, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer += movementrate/2.0)));
 682                         SDL_BlitSurface(surf_b_variations,&src,surf_screen,&dest);
 683
 684                         src.w = surf_b_on->w;
 685                         src.h = surf_b_on->h;
 686                         dest.w = src.w;
 687                         dest.h = src.h;
 688                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 1.0)/6.5)*10;
 689                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + 20 + sin((fadetimer + 1.0)/5.0)*10;
 690                         SDL_SetAlpha(surf_b_on, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-1.0)));
 691                         SDL_BlitSurface(surf_b_on,&src,surf_screen,&dest);
 692
 693                         src.w = surf_b_rockdodger->w;
 694                         src.h = surf_b_rockdodger->h;
 695                         dest.w = src.w;
 696                         dest.h = src.h;
 697                         dest.x = (XSIZE-src.w)/2 + cos((fadetimer + 2.0)/6.5)*10;
 698                         dest.y = (YSIZE/2-src.h)/2 + surf_b_variations->h + surf_b_on->h + 40 + sin((fadetimer + 2.0)/5)*10;
 699                         SDL_SetAlpha(surf_b_rockdodger, SDL_SRCALPHA, (int)(200 + 55*sin(fadetimer-2.0)));
 700                         SDL_BlitSurface(surf_b_rockdodger,&src,surf_screen,&dest);
 701
 702                         text = "Version " VERSION;
 703                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + sin(fadetimer/4.5)*10;
 704                         SFont_Write(surf_screen,g_font,x,YSIZE-50 + sin(fadetimer/2)*5,text);
 705
 706                         text = sequence[(int)(fadetimer/40)%NSEQUENCE];
 707                         //text = "Press SPACE to start!";
 708                         x = (XSIZE-SFont_TextWidth(g_font,text))/2 + cos(fadetimer/4.5)*10;
 709                         SFont_Write(surf_screen,g_font,x,YSIZE-100 + cos(fadetimer/3)*5,text);
 710                 break;
 711
 712                 case HIGH_SCORE_ENTRY:
 713                         play_tune(2);
 714                         if(!process_score_input()) {  // done inputting name
 715
 716                                 // Change state to briefly show high scores page
 717                                 state = HIGH_SCORE_DISPLAY;
 718                                 state_timeout = 200;
 719
 720                                 // Write the high score table to the file
 721                                 write_high_score_table();
 722
 723                                 // Play the title page tune
 724                                 play_tune(0);
 725                         }
 726                 // FALL THROUGH TO
 727                 case HIGH_SCORE_DISPLAY:
 728                         // Display de list o high scores mon.
 729                         display_scores(surf_screen, 150,50);
 730                         break;
 731                 case GAMEPLAY:
 732                 case DEAD_PAUSE:
 733                         ; // no action necessary
 734         }
 735
 736         if(!gameover && state == GAMEPLAY) {
 737                 SDL_LockSurface(surf_screen);
 738                 raw_pixels = (Uint16 *) surf_screen->pixels;
 739                 // Check that the black points on the ship are
 740                 // still black, and not covered up by rocks.
 741                 for(p = black_point; p<blackptr; p++) {
 742                         offset = surf_screen->pitch/2 * (p->y + (int)shipy) + p->x + (int)shipx;
 743                         if(raw_pixels[offset]) {
 744                                 // Set the bang flag
 745                                 bang = 1;
 746                         }
 747                 }
 748                 SDL_UnlockSurface(surf_screen);
 749         }
 750
 751         // Draw all the little ships
 752         if(state == GAMEPLAY || state == DEAD_PAUSE || state == GAME_OVER)
 753         for(i = 0; i<nships-1; i++) {
 754                 src.w = surf_life->w;
 755                 src.h = surf_life->h;
 756                 dest.w = src.w;
 757                 dest.h = src.h;
 758                 dest.x = (i + 1)*(src.w + 10);
 759                 dest.y = 20;
 760                 SDL_BlitSurface(surf_life,&src,surf_screen,&dest);
 761         }
 762
 763
 764         // Update the score
 765         /*
 766         n = SDL_GetTicks()-initticks;
 767         if(score)
 768         ticks_since_last = n-score;
 769         score = n;
 770         */
 771
 772         ticks_since_last = SDL_GetTicks()-last_ticks;
 773         last_ticks = SDL_GetTicks();
 774         if(ticks_since_last>200 || ticks_since_last<0) {
 775                 movementrate = 0;
 776         }
 777         else {
 778                 movementrate = ticks_since_last/50.0;
 779                 if(state == GAMEPLAY) {
 780                         score += ticks_since_last;
 781                 }
 782         }
 783
 784         // Update the surface
 785         SDL_Flip(surf_screen);
 786
 787
 788         return bang;
 789 }
 790
 791 int
 792 gameloop() {
 793         int i = 0;
 794         Uint8 *keystate;
 795
 796
 797         for(;;) {
 798                 if(!paused) {
 799                         // Count down the game loop timer, and change state when it gets to zero or less;
 800
 801                         if((state_timeout -= movementrate*3) < 0) {
 802                                 switch(state) {
 803                                         case DEAD_PAUSE:
 804                                                 // Create a new ship and start all over again
 805                                                 state = GAMEPLAY;
 806                                                 play_tune(1);
 807                                                 shipx -= 50;
 808                                                 break;
 809                                         case GAME_OVER:
 810                                                 state = HIGH_SCORE_ENTRY;
 811                                                 state_timeout = 5.0e6;
 812                                                 if(new_high_score(score)) {
 813                                                         SDL_Event e;
 814                                                         SDL_EnableUNICODE(1);
 815                                                         while(SDL_PollEvent(&e))
 816                                                                 ;
 817                                                 } else {
 818                                                         state = HIGH_SCORE_DISPLAY;
 819                                                         state_timeout = 400;
 820                                                 }
 821                                                 break;
 822                                         case HIGH_SCORE_DISPLAY:
 823                                                 state = TITLE_PAGE;
 824                                                 state_timeout = 500.0;
 825                                                 break;
 826                                         case HIGH_SCORE_ENTRY:
 827                                                 // state = TITLE_PAGE;
 828                                                 // play_tune(1);
 829                                                 // state_timeout = 100.0;
 830                                                 break;
 831                                         case TITLE_PAGE:
 832                                                 state = HIGH_SCORE_DISPLAY;
 833                                                 state_timeout = 200.0;
 834                                                 break;
 835                                         case GAMEPLAY:
 836                                                 ; // no action necessary
 837                                 }
 838                         } else {
 839                                 if(state == DEAD_PAUSE) {
 840                                         float blast_radius = BLAST_RADIUS * state_timeout / 20.0;
 841                                         if(shipx < 60) shipx = 60;
 842                                         for(i = 0; i<MAXROCKS; i++ ) {
 843                                                 float dx, dy, n;
 844                                                 if(rock[i].x <= 0) continue;
 845                                                 dx = rock[i].x - shipx;
 846                                                 dy = rock[i].y - shipy;
 847                                                 n = sqrt(dx*dx + dy*dy);
 848                                                 if(n < blast_radius) {
 849                                                         n *= 20;
 850                                                         rock[i].dx += rockrate*(dx+30)/n;
 851                                                         rock[i].dy += rockrate*dy/n;
 852                                                         rock[i].dead = 1;
 853                                                 }
 854                                         }
 855                                 }
 856                         }
 857
 858                         if(--countdown <= 0 && (rnd()*100.0<(rockrate += 0.025))) {
 859                                 // Create a rock
 860                                 rockptr++;
 861                                 if(rockptr-rock >= MAXROCKS) {
 862                                         rockptr = rock;
 863                                 }
 864                                 if(!rockptr->active) {
 865                                         rockptr->x = (float)XSIZE;
 866                                         rockptr->dx = -(rockspeed)*(1 + rnd());
 867                                         rockptr->dy = rnd()-0.5;
 868                                         rockptr->type_number = random() % NROCKS;
 869                                         rockptr->image = surf_rock[rockptr->type_number];// [random()%NROCKS];
 870                                         rockptr->active = 1;
 871                                         rockptr->y = rnd()*(YSIZE + rockptr->image->h);
 872                                 }
 873                                 if(movementrate>0.1) {
 874                                         countdown = (int)(ROCKRATE/movementrate);
 875                                 } else {
 876                                         countdown = 0;
 877                                 }
 878                         }
 879
 880                         // FRICTION?
 881                         if(friction) {
 882                                 shipdx *= pow((double)0.9,(double)movementrate);
 883                                 shipdy *= pow((double)0.9,(double)movementrate);
 884                                 // if(abs(shipdx)<0.00001) shipdx = 0;
 885                                 // if(abs(shipdy)<0.00001) shipdy = 0;
 886                         }
 887
 888                         // INERTIA
 889                         shipx += shipdx*movementrate;
 890                         shipy += shipdy*movementrate;
 891
 892                         // SCROLLING
 893                         yscroll = shipy - (YSIZE / 2);
 894                         yscroll += shipdy * 25;
 895                         yscroll /= -25;
 896                         yscroll = ((scrollvel * (12 - movementrate)) + (yscroll * movementrate)) / 12;
 897                         scrollvel = yscroll;
 898                         yscroll = yscroll*movementrate;
 899                         shipy += yscroll;
 900
 901                         // Move all the rocks
 902                         for(i = 0; i < MAXROCKS; i++) {
 903                                 if(rock[i].active) {
 904                                         rock[i].x += rock[i].dx*movementrate;
 905                                         rock[i].y += rock[i].dy*movementrate + yscroll;
 906                                         if(rock[i].y > YSIZE || rock[i].y < -rock[i].image->h) {
 907                                                 if(rock[i].dead) {
 908                                                         rock[i].dead = 0;
 909                                                         rock[i].active = 0;
 910                                                 } else {
 911                                                         // wrap
 912                                                         rock[i].y = (YSIZE - rock[i].image->h) - rock[i].y;
 913                                                         rock[i].y += (rock[i].dy*movementrate + yscroll) * 1.01;
 914                                                 }
 915                                         }
 916                                         if(rock[i].x < -rock[i].image->w || rock[i].x > XSIZE) {
 917                                                 rock[i].active = 0;
 918                                                 rock[i].dead = 0;
 919                                         }
 920                                 }
 921                         }
 922
 923
 924                         // BOUNCE X
 925                         if(shipx<0 || shipx>XSIZE-surf_ship->w) {
 926                                 // BOUNCE from left and right wall
 927                                 shipx -= shipdx*movementrate;
 928                                 shipdx *= -0.99;
 929                         }
 930
 931                         // BOUNCE Y
 932                         if(shipy<0 || shipy>YSIZE-surf_ship->h) {
 933                                 // BOUNCE from top and bottom wall
 934                                 shipy -= shipdy;
 935                                 shipdy *= -0.99;
 936                         }
 937
 938
 939                         if(draw() && state == GAMEPLAY) {
 940                                 // Play the explosion sound
 941                                 play_sound(0);
 942                                 makebangdots(shipx,shipy,shipdx,shipdy,surf_ship,30);
 943                                 if(--nships <= 0) {
 944                                         gameover = 1;
 945                                         state = GAME_OVER;
 946                                         state_timeout = 200.0;
 947                                         fadetimer = 0.0;
 948                                         faderate = movementrate;
 949                                 }
 950                                 else {
 951                                         state = DEAD_PAUSE;
 952                                         state_timeout = 20.0;
 953                                         shipdx = 0;
 954                                         shipdy = 0;
 955                                 }
 956                         }
 957
 958                         SDL_PumpEvents();
 959                         keystate = SDL_GetKeyState(NULL);
 960
 961                         if(state != HIGH_SCORE_ENTRY && (keystate[SDLK_q] || keystate[SDLK_ESCAPE])) {
 962                                 return 0;
 963                         }
 964
 965                         if(keystate[SDLK_SPACE] && (state == HIGH_SCORE_DISPLAY || state == TITLE_PAGE)) {
 966
 967                                 for(i = 0; i<MAXROCKS; i++ ) {
 968                                         rock[i].active = 0;
 969                                         rock[i].dead = 0;
 970                                 }
 971
 972                                 rockrate = 54.0;
 973                                 rockspeed = 5.0;
 974
 975                                 nships = 4;
 976                                 score = 0;
 977
 978                                 state = GAMEPLAY;
 979                                 play_tune(1);
 980
 981                                 gameover = 0;
 982                                 shipx = 0;
 983                                 shipy = YSIZE/2;
 984                                 shipdx = -1;
 985                                 shipdy = 0;
 986                         }
 987
 988                         maneuver = 0;
 989                 } else {
 990                         SDL_PumpEvents();
 991                         keystate = SDL_GetKeyState(NULL);
 992                 }
 993
 994                 if(state == GAMEPLAY) {
 995                         if(!gameover) {
 996
 997                                 if(!paused) {
 998                                         if(keystate[SDLK_UP] | keystate[SDLK_c])                { shipdy -= 1.5*movementrate; maneuver |= 1<<3;}
 999                                         if(keystate[SDLK_DOWN] | keystate[SDLK_t])              { shipdy += 1.5*movementrate; maneuver |= 1<<1;}
1000                                         if(keystate[SDLK_LEFT] | keystate[SDLK_h])              { shipdx -= 1.5*movementrate; maneuver |= 1<<2;}
1001                                         if(keystate[SDLK_RIGHT] | keystate[SDLK_n])             { shipdx += 1.5*movementrate; maneuver |= 1;}
1002                                         if(keystate[SDLK_3])            { SDL_SaveBMP(surf_screen, "snapshot.bmp"); }
1003                                 }
1004
1005                                 if(keystate[SDLK_p] | keystate[SDLK_s]) {
1006                                         if(!pausedown) {
1007                                                 paused = !paused;
1008                                                 if(paused) {
1009                                                         SDL_Rect src,dest;
1010                                                         src.w = surf_b_variations->w;
1011                                                         src.h = surf_b_variations->h;
1012                                                         dest.w = src.w;
1013                                                         dest.h = src.h;
1014                                                         dest.x = (XSIZE-src.w)/2;
1015                                                         dest.y = (YSIZE-src.h)/2;
1016                                                         SDL_BlitSurface(surf_b_variations,&src,surf_screen,&dest);
1017                                                         // Update the surface
1018                                                         SDL_Flip(surf_screen);
1019                                                 }
1020                                                 pausedown = 1;
1021                                         }
1022                                 } else {
1023                                         pausedown = 0;
1024                                 }
1025
1026                         }
1027                         else {
1028                                 paused = 0;
1029                                 pausedown = 0;
1030                         }
1031                 } else if(state == GAME_OVER) {
1032                         if(keystate[SDLK_SPACE]) {
1033                                 state_timeout = -1;
1034                         }
1035                 }
1036         }
1037 }
1038
1039 int
1040 main(int argc, char **argv) {
1041         int i, x, fullscreen;
1042
1043         fullscreen = 0;
1044         tail_plume = 0;
1045         friction = 0;
1046         sound_flag = 1;
1047         music_flag = 0;
1048
1049         while ((x = getopt(argc,argv,"efhmps")) >= 0) {
1050                 switch(x) {
1051                         case 'e': // engine
1052                                 tail_plume = 1;
1053                         break;
1054                         case 'f': // fullscreen
1055                                 fullscreen = 1;
1056                         break;
1057                         case 'h': // help
1058                                 printf("Variations on RockDodger\n"
1059                                        " -e big tail [E]ngine\n"
1060                                        " -f [F]ull screen\n"
1061                                        " -h this [H]elp message\n"
1062                                        " -m enable [M]usic\n"
1063                                        " -p original [P]hysics (friction)\n"
1064                                        " -s [S]ilent (no sound)\n");
1065                                 exit(0);
1066                         break;
1067                         case 'm': // music
1068                                 music_flag = 1;
1069                         case 'p': // physics
1070                                 friction = 1;
1071                         break;
1072                         case 's': // silent
1073                                 sound_flag = 0;
1074                                 music_flag = 0;
1075                         break;
1076                 }
1077         }
1078
1079         if(init(fullscreen)) {
1080                 printf ("ta: '%s'\n",initerror);
1081                 return 1;
1082         }
1083
1084         for(i = 0; i<MAXROCKS; i++) {
1085                 rock[i].active = 0;
1086                 rock[i].dead = 0;
1087         }
1088         rockrate = 54.0;
1089         rockspeed = 5.0;
1090         initticks = SDL_GetTicks();
1091         gameloop();
1092
1093         return 0;
1094 }