| 1 | /* |
| 2 | * Elite - The New Kind. |
| 3 | * |
| 4 | * Reverse engineered from the BBC disk version of Elite. |
| 5 | * Additional material by C.J.Pinder. |
| 6 | * |
| 7 | * The original Elite code is (C) I.Bell & D.Braben 1984. |
| 8 | * This version re-engineered in C by C.J.Pinder 1999-2001. |
| 9 | * |
| 10 | * email: <christian@newkind.co.uk> |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | /* |
| 15 | * |
| 16 | * Handle the generation of planet info... |
| 17 | */ |
| 18 | |
| 19 | #include <ctype.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | #include <stdio.h> |
| 23 | |
| 24 | #include "config.h" |
| 25 | #include "gfx.h" |
| 26 | #include "elite.h" |
| 27 | #include "planet.h" |
| 28 | #include "missions.h" |
| 29 | |
| 30 | |
| 31 | extern struct galaxy_seed hyperspace_planet; |
| 32 | |
| 33 | struct random_seed |
| 34 | { |
| 35 | int a; |
| 36 | int b; |
| 37 | int c; |
| 38 | int d; |
| 39 | }; |
| 40 | |
| 41 | |
| 42 | static struct random_seed rnd_seed; |
| 43 | |
| 44 | static char *digrams="ABOUSEITILETSTONLONUTHNOALLEXEGEZACEBISOUSESARMAINDIREA?ERATENBERALAVETIEDORQUANTEISRION"; |
| 45 | |
| 46 | static char *inhabitant_desc1[] = {"Large ", "Fierce ", "Small "}; |
| 47 | |
| 48 | static char *inhabitant_desc2[] = {"Green ", "Red ", "Yellow ", "Blue ", "Black ", "Harmless "}; |
| 49 | |
| 50 | static char *inhabitant_desc3[] = {"Slimy ", "Bug-Eyed ", "Horned ", "Bony ", "Fat ", "Furry "}; |
| 51 | |
| 52 | static char *inhabitant_desc4[] = {"Rodent", "Frog", "Lizard", "Lobster", "Bird", "Humanoid", "Feline", "Insect"}; |
| 53 | |
| 54 | |
| 55 | static char planet_description[300]; |
| 56 | static char *desc_ptr; |
| 57 | |
| 58 | |
| 59 | |
| 60 | |
| 61 | static char *desc_list[36][5] = |
| 62 | { |
| 63 | /* 0 */ {"fabled", "notable", "well known", "famous", "noted"}, |
| 64 | /* 1 */ {"very", "mildly", "most", "reasonably", ""}, |
| 65 | /* 2 */ {"ancient", "<20>", "great", "vast", "pink"}, |
| 66 | /* 3 */ {"<29> <28> plantations", "mountains", "<27>", "<19> forests", "oceans"}, |
| 67 | /* 4 */ {"shyness", "silliness", "mating traditions", "loathing of <5>", "love for <5>"}, |
| 68 | /* 5 */ {"food blenders", "tourists", "poetry", "discos", "<13>"}, |
| 69 | /* 6 */ {"talking tree", "crab", "bat", "lobst", "%R"}, |
| 70 | /* 7 */ {"beset", "plagued", "ravaged", "cursed", "scourged"}, |
| 71 | /* 8 */ {"<21> civil war", "<26> <23> <24>s", "a <26> disease", "<21> earthquakes", "<21> solar activity"}, |
| 72 | /* 9 */ {"its <2> <3>", "the %I <23> <24>","its inhabitants' <25> <4>", "<32>", "its <12> <13>"}, |
| 73 | /* 10 */ {"juice", "brandy", "water", "brew", "gargle blasters"}, |
| 74 | /* 11 */ {"%R", "%I <24>", "%I %R", "%I <26>", "<26> %R"}, |
| 75 | /* 12 */ {"fabulous", "exotic", "hoopy", "unusual", "exciting"}, |
| 76 | /* 13 */ {"cuisine", "night life", "casinos", "sit coms", " <32> "}, |
| 77 | /* 14 */ {"%H", "The planet %H", "The world %H", "This planet", "This world"}, |
| 78 | /* 15 */ {"n unremarkable", " boring", " dull", " tedious", " revolting"}, |
| 79 | /* 16 */ {"planet", "world", "place", "little planet", "dump"}, |
| 80 | /* 17 */ {"wasp", "moth", "grub", "ant", "%R"}, |
| 81 | /* 18 */ {"poet", "arts graduate", "yak", "snail", "slug"}, |
| 82 | /* 19 */ {"tropical", "dense", "rain", "impenetrable", "exuberant"}, |
| 83 | /* 20 */ {"funny", "wierd", "unusual", "strange", "peculiar"}, |
| 84 | /* 21 */ {"frequent", "occasional", "unpredictable", "dreadful", "deadly"}, |
| 85 | /* 22 */ {"<1> <0> for <9>", "<1> <0> for <9> and <9>", "<7> by <8>", "<1> <0> for <9> but <7> by <8>"," a<15> <16>"}, |
| 86 | /* 23 */ {"<26>", "mountain", "edible", "tree", "spotted"}, |
| 87 | /* 24 */ {"<30>", "<31>", "<6>oid", "<18>", "<17>"}, |
| 88 | /* 25 */ {"ancient", "exceptional", "eccentric", "ingrained", "<20>"}, |
| 89 | /* 26 */ {"killer", "deadly", "evil", "lethal", "vicious"}, |
| 90 | /* 27 */ {"parking meters", "dust clouds", "ice bergs", "rock formations", "volcanoes"}, |
| 91 | /* 28 */ {"plant", "tulip", "banana", "corn", "%Rweed"}, |
| 92 | /* 29 */ {"%R", "%I %R", "%I <26>", "inhabitant", "%I %R"}, |
| 93 | /* 30 */ {"shrew", "beast", "bison", "snake", "wolf"}, |
| 94 | /* 31 */ {"leopard", "cat", "monkey", "goat", "fish"}, |
| 95 | /* 32 */ {"<11> <10>", "%I <30> <33>","its <12> <31> <33>", "<34> <35>", "<11> <10>"}, |
| 96 | /* 33 */ {"meat", "cutlet", "steak", "burgers", "soup"}, |
| 97 | /* 34 */ {"ice", "mud", "Zero-G", "vacuum", "%I ultra"}, |
| 98 | /* 35 */ {"hockey", "cricket", "karate", "polo", "tennis"} |
| 99 | }; |
| 100 | |
| 101 | |
| 102 | |
| 103 | |
| 104 | |
| 105 | |
| 106 | |
| 107 | |
| 108 | /* |
| 109 | * Generate a random number between 0 and 255. |
| 110 | * This is the version used in the 6502 Elites. |
| 111 | */ |
| 112 | |
| 113 | int gen_rnd_number (void) |
| 114 | { |
| 115 | int a,x; |
| 116 | |
| 117 | x = (rnd_seed.a * 2) & 0xFF; |
| 118 | a = x + rnd_seed.c; |
| 119 | if (rnd_seed.a > 127) |
| 120 | a++; |
| 121 | rnd_seed.a = a & 0xFF; |
| 122 | rnd_seed.c = x; |
| 123 | |
| 124 | a = a / 256; /* a = any carry left from above */ |
| 125 | x = rnd_seed.b; |
| 126 | a = (a + x + rnd_seed.d) & 0xFF; |
| 127 | rnd_seed.b = a; |
| 128 | rnd_seed.d = x; |
| 129 | return a; |
| 130 | } |
| 131 | |
| 132 | |
| 133 | /* |
| 134 | * Generate a random number between 0 and 255. |
| 135 | * This is the version used in the MSX and 16bit Elites. |
| 136 | */ |
| 137 | |
| 138 | |
| 139 | int gen_msx_rnd_number (void) |
| 140 | { |
| 141 | int a,b; |
| 142 | |
| 143 | a = rnd_seed.a; |
| 144 | b = rnd_seed.b; |
| 145 | |
| 146 | rnd_seed.a = rnd_seed.c; |
| 147 | rnd_seed.b = rnd_seed.d; |
| 148 | |
| 149 | a += rnd_seed.c; |
| 150 | b = (b + rnd_seed.d) & 255; |
| 151 | if (a > 255) |
| 152 | { |
| 153 | a &= 255; |
| 154 | b++; |
| 155 | } |
| 156 | |
| 157 | rnd_seed.c = a; |
| 158 | rnd_seed.d = b; |
| 159 | |
| 160 | return rnd_seed.c / 0x34; |
| 161 | } |
| 162 | |
| 163 | |
| 164 | void waggle_galaxy (struct galaxy_seed *glx_ptr) |
| 165 | { |
| 166 | unsigned int x; |
| 167 | unsigned int y; |
| 168 | extern int carry_flag; |
| 169 | |
| 170 | x = glx_ptr->a + glx_ptr->c; |
| 171 | y = glx_ptr->b + glx_ptr->d; |
| 172 | |
| 173 | |
| 174 | if (x > 0xFF) |
| 175 | y++; |
| 176 | |
| 177 | x &= 0xFF; |
| 178 | y &= 0xFF; |
| 179 | |
| 180 | glx_ptr->a = glx_ptr->c; |
| 181 | glx_ptr->b = glx_ptr->d; |
| 182 | glx_ptr->c = glx_ptr->e; |
| 183 | glx_ptr->d = glx_ptr->f; |
| 184 | |
| 185 | x += glx_ptr->c; |
| 186 | y += glx_ptr->d; |
| 187 | |
| 188 | |
| 189 | if (x > 0xFF) |
| 190 | y++; |
| 191 | |
| 192 | if (y > 0xFF) |
| 193 | carry_flag = 1; |
| 194 | else |
| 195 | carry_flag = 0; |
| 196 | |
| 197 | x &= 0xFF; |
| 198 | y &= 0xFF; |
| 199 | |
| 200 | glx_ptr->e = x; |
| 201 | glx_ptr->f = y; |
| 202 | } |
| 203 | |
| 204 | |
| 205 | |
| 206 | |
| 207 | struct galaxy_seed find_planet (int cx, int cy) |
| 208 | { |
| 209 | int min_dist = 10000; |
| 210 | struct galaxy_seed glx; |
| 211 | struct galaxy_seed planet; |
| 212 | int distance; |
| 213 | int dx, dy; |
| 214 | int i; |
| 215 | |
| 216 | glx = cmdr.galaxy; |
| 217 | |
| 218 | for (i = 0; i < 256; i++) |
| 219 | { |
| 220 | |
| 221 | dx = abs(cx - glx.d); |
| 222 | dy = abs(cy - glx.b); |
| 223 | |
| 224 | if (dx > dy) |
| 225 | distance = (dx + dx + dy) / 2; |
| 226 | else |
| 227 | distance = (dx + dy + dy) / 2; |
| 228 | |
| 229 | if (distance < min_dist) |
| 230 | { |
| 231 | min_dist = distance; |
| 232 | planet = glx; |
| 233 | } |
| 234 | |
| 235 | waggle_galaxy (&glx); |
| 236 | waggle_galaxy (&glx); |
| 237 | waggle_galaxy (&glx); |
| 238 | waggle_galaxy (&glx); |
| 239 | } |
| 240 | |
| 241 | return planet; |
| 242 | } |
| 243 | |
| 244 | |
| 245 | int find_planet_number (struct galaxy_seed planet) |
| 246 | { |
| 247 | struct galaxy_seed glx; |
| 248 | int i; |
| 249 | |
| 250 | glx = cmdr.galaxy; |
| 251 | |
| 252 | for (i = 0; i < 256; i++) |
| 253 | { |
| 254 | |
| 255 | if ((planet.a == glx.a) && |
| 256 | (planet.b == glx.b) && |
| 257 | (planet.c == glx.c) && |
| 258 | (planet.d == glx.d) && |
| 259 | (planet.e == glx.e) && |
| 260 | (planet.f == glx.f)) |
| 261 | return i; |
| 262 | |
| 263 | waggle_galaxy (&glx); |
| 264 | waggle_galaxy (&glx); |
| 265 | waggle_galaxy (&glx); |
| 266 | waggle_galaxy (&glx); |
| 267 | } |
| 268 | |
| 269 | return -1; |
| 270 | } |
| 271 | |
| 272 | |
| 273 | |
| 274 | void name_planet (char *gname, struct galaxy_seed glx) |
| 275 | { |
| 276 | int size; |
| 277 | int i; |
| 278 | char *gp; |
| 279 | unsigned int x; |
| 280 | |
| 281 | |
| 282 | gp = gname; |
| 283 | |
| 284 | if ((glx.a & 0x40) == 0) |
| 285 | size = 3; |
| 286 | else |
| 287 | size = 4; |
| 288 | |
| 289 | for (i = 0; i < size; i++) |
| 290 | { |
| 291 | x = glx.f & 0x1F; |
| 292 | if (x != 0) |
| 293 | { |
| 294 | x += 12; |
| 295 | x *= 2; |
| 296 | *gp++ = digrams[x]; |
| 297 | if (digrams[x+1] != '?') |
| 298 | *gp++ = digrams[x+1]; |
| 299 | } |
| 300 | |
| 301 | waggle_galaxy (&glx); |
| 302 | } |
| 303 | |
| 304 | *gp = '\0'; |
| 305 | } |
| 306 | |
| 307 | |
| 308 | void capitalise_name (char *name) |
| 309 | { |
| 310 | char *ptr = name; |
| 311 | |
| 312 | if (*ptr == '\0') |
| 313 | return; |
| 314 | |
| 315 | *ptr = toupper(*ptr); |
| 316 | ptr++; |
| 317 | |
| 318 | while (*ptr != '\0') |
| 319 | { |
| 320 | *ptr = tolower(*ptr); |
| 321 | ptr++; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | |
| 326 | void describe_inhabitants (char *str, struct galaxy_seed planet) |
| 327 | { |
| 328 | int inhab; |
| 329 | |
| 330 | strcpy (str, "("); |
| 331 | |
| 332 | if (planet.e < 128) |
| 333 | { |
| 334 | strcat (str, "Human Colonial"); |
| 335 | } |
| 336 | else |
| 337 | { |
| 338 | inhab = (planet.f / 4) & 7; |
| 339 | if (inhab < 3) |
| 340 | strcat (str, inhabitant_desc1[inhab]); |
| 341 | |
| 342 | inhab = planet.f / 32; |
| 343 | if (inhab < 6) |
| 344 | strcat (str, inhabitant_desc2[inhab]); |
| 345 | |
| 346 | inhab = (planet.d ^ planet.b) & 7; |
| 347 | if (inhab < 6) |
| 348 | strcat (str, inhabitant_desc3[inhab]); |
| 349 | |
| 350 | inhab = (inhab + (planet.f & 3)) & 7; |
| 351 | strcat (str, inhabitant_desc4[inhab]); |
| 352 | } |
| 353 | |
| 354 | strcat (str, "s)"); |
| 355 | } |
| 356 | |
| 357 | |
| 358 | |
| 359 | void expand_description (char *source) |
| 360 | { |
| 361 | char str[32]; |
| 362 | char *ptr; |
| 363 | int num; |
| 364 | int rnd; |
| 365 | int option; |
| 366 | int i, len, x; |
| 367 | |
| 368 | while (*source != '\0') |
| 369 | { |
| 370 | if (*source == '<') |
| 371 | { |
| 372 | source++; |
| 373 | ptr = str; |
| 374 | while (*source != '>') |
| 375 | *ptr++ = *source++; |
| 376 | *ptr = '\0'; |
| 377 | source++; |
| 378 | num = atoi(str); |
| 379 | |
| 380 | if (hoopy_casinos) |
| 381 | { |
| 382 | option = gen_msx_rnd_number(); |
| 383 | } |
| 384 | else |
| 385 | { |
| 386 | rnd = gen_rnd_number(); |
| 387 | option = 0; |
| 388 | if (rnd >= 0x33) option++; |
| 389 | if (rnd >= 0x66) option++; |
| 390 | if (rnd >= 0x99) option++; |
| 391 | if (rnd >= 0xCC) option++; |
| 392 | } |
| 393 | |
| 394 | expand_description (desc_list[num][option]); |
| 395 | continue; |
| 396 | } |
| 397 | |
| 398 | if (*source == '%') |
| 399 | { |
| 400 | source++; |
| 401 | switch (*source) |
| 402 | { |
| 403 | case 'H': |
| 404 | name_planet (str, hyperspace_planet); |
| 405 | capitalise_name (str); |
| 406 | for (ptr = str; *ptr != '\0';) |
| 407 | *desc_ptr++ = *ptr++; |
| 408 | break; |
| 409 | |
| 410 | case 'I': |
| 411 | name_planet (str, hyperspace_planet); |
| 412 | capitalise_name (str); |
| 413 | for (ptr = str; *ptr != '\0';) |
| 414 | *desc_ptr++ = *ptr++; |
| 415 | desc_ptr--; |
| 416 | strcpy (desc_ptr, "ian"); |
| 417 | desc_ptr += 3; |
| 418 | break; |
| 419 | |
| 420 | case 'R': |
| 421 | len = gen_rnd_number() & 3; |
| 422 | for (i = 0; i <= len; i++) |
| 423 | { |
| 424 | x = gen_rnd_number() & 0x3e; |
| 425 | if (i == 0) |
| 426 | *desc_ptr++ = digrams[x]; |
| 427 | else |
| 428 | *desc_ptr++ = tolower(digrams[x]); |
| 429 | *desc_ptr++ = tolower(digrams[x+1]); |
| 430 | } |
| 431 | |
| 432 | } |
| 433 | |
| 434 | source++; |
| 435 | continue; |
| 436 | } |
| 437 | |
| 438 | *desc_ptr++ = *source++; |
| 439 | } |
| 440 | |
| 441 | |
| 442 | |
| 443 | *desc_ptr = '\0'; |
| 444 | } |
| 445 | |
| 446 | |
| 447 | |
| 448 | char *describe_planet (struct galaxy_seed planet) |
| 449 | { |
| 450 | char *mission_text; |
| 451 | |
| 452 | if (cmdr.mission == 1) |
| 453 | { |
| 454 | mission_text = mission_planet_desc (planet); |
| 455 | if (mission_text != NULL) |
| 456 | return mission_text; |
| 457 | } |
| 458 | |
| 459 | rnd_seed.a = planet.c; |
| 460 | rnd_seed.b = planet.d; |
| 461 | rnd_seed.c = planet.e; |
| 462 | rnd_seed.d = planet.f; |
| 463 | |
| 464 | if (hoopy_casinos) |
| 465 | { |
| 466 | rnd_seed.a ^= planet.a; |
| 467 | rnd_seed.b ^= planet.b; |
| 468 | rnd_seed.c ^= rnd_seed.a; |
| 469 | rnd_seed.d ^= rnd_seed.b; |
| 470 | } |
| 471 | |
| 472 | desc_ptr = planet_description; |
| 473 | |
| 474 | expand_description ("<14> is <22>."); |
| 475 | |
| 476 | return planet_description; |
| 477 | } |
| 478 | |
| 479 | |
| 480 | |
| 481 | void generate_planet_data (struct planet_data *pl, struct galaxy_seed planet_seed) |
| 482 | { |
| 483 | |
| 484 | pl->government = (planet_seed.c / 8) & 7; |
| 485 | |
| 486 | pl->economy = planet_seed.b & 7; |
| 487 | |
| 488 | if (pl->government < 2) |
| 489 | pl->economy = pl->economy | 2; |
| 490 | |
| 491 | pl->techlevel = pl->economy ^ 7; |
| 492 | pl->techlevel += planet_seed.d & 3; |
| 493 | pl->techlevel += (pl->government / 2) + (pl->government & 1); |
| 494 | |
| 495 | |
| 496 | pl->population = pl->techlevel * 4; |
| 497 | pl->population += pl->government; |
| 498 | pl->population += pl->economy; |
| 499 | pl->population++; |
| 500 | |
| 501 | pl->productivity = (pl->economy ^ 7) + 3; |
| 502 | pl->productivity *= pl->government + 4; |
| 503 | pl->productivity *= pl->population; |
| 504 | pl->productivity *= 8; |
| 505 | |
| 506 | pl->radius = (((planet_seed.f & 15) + 11) * 256) + planet_seed.d; |
| 507 | } |
| 508 | |
| 509 | |
| 510 | |