84bbd123 |
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 | |