3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include "util/numeric.h"
23 #include "mapgen_v6.h"
24 #include "mapgen_v7.h"
27 NoiseParams nparams_caveliquids =
28 {0, 1, v3f(150.0, 150.0, 150.0), 776, 3, 0.6};
31 ///////////////////////////////////////////////////////////////////////////////
34 CaveV6::CaveV6(MapgenV6 *mg, PseudoRandom *ps, PseudoRandom *ps2, bool is_large_cave) {
37 this->ndef = mg->ndef;
38 this->water_level = mg->water_level;
39 this->large_cave = is_large_cave;
42 this->c_water_source = mg->c_water_source;
43 this->c_lava_source = mg->c_lava_source;
45 min_tunnel_diameter = 2;
46 max_tunnel_diameter = ps->range(2, 6);
47 dswitchint = ps->range(1, 14);
51 part_max_length_rs = ps->range(2,4);
52 tunnel_routepoints = ps->range(5, ps->range(15,30));
53 min_tunnel_diameter = 5;
54 max_tunnel_diameter = ps->range(7, ps->range(8,24));
56 part_max_length_rs = ps->range(2,9);
57 tunnel_routepoints = ps->range(10, ps->range(15,30));
60 large_cave_is_flat = (ps->range(0,1) == 0);
64 void CaveV6::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
67 max_stone_y = max_stone_height;
68 main_direction = v3f(0, 0, 0);
70 // Allowed route area size in nodes
71 ar = node_max - node_min + v3s16(1, 1, 1);
72 // Area starting point in nodes
76 //(this should be more than the maximum radius of the tunnel)
77 const s16 max_spread_amount = MAP_BLOCKSIZE;
79 s16 more = MYMAX(max_spread_amount - max_tunnel_diameter / 2 - insure, 1);
80 ar += v3s16(1,0,1) * more * 2;
81 of -= v3s16(1,0,1) * more;
84 // Allow half a diameter + 7 over stone surface
85 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
87 // Limit maximum to area
88 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
92 if (node_min.Y < water_level && node_max.Y > water_level) {
93 min = water_level - max_tunnel_diameter/3 - of.Y;
94 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
96 route_y_min = ps->range(min, min + max_tunnel_diameter);
97 route_y_min = rangelim(route_y_min, 0, route_y_max);
100 s16 route_start_y_min = route_y_min;
101 s16 route_start_y_max = route_y_max;
103 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y-1);
104 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y-1);
106 // Randomize starting position
108 (float)(ps->next() % ar.X) + 0.5,
109 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
110 (float)(ps->next() % ar.Z) + 0.5
113 int notifytype = large_cave ? GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
114 if (mg->gennotify & (1 << notifytype)) {
115 std::vector <v3s16> *nvec = mg->gen_notifications[notifytype];
116 nvec->push_back(v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z));
119 // Generate some tunnel starting from orp
120 for (u16 j = 0; j < tunnel_routepoints; j++)
121 makeTunnel(j % dswitchint == 0);
123 notifytype = large_cave ? GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
124 if (mg->gennotify & (1 << notifytype)) {
125 std::vector <v3s16> *nvec = mg->gen_notifications[notifytype];
126 nvec->push_back(v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z));
131 void CaveV6::makeTunnel(bool dirswitch) {
132 if (dirswitch && !large_cave) {
133 main_direction = v3f(
134 ((float)(ps->next() % 20) - (float)10) / 10,
135 ((float)(ps->next() % 20) - (float)10) / 30,
136 ((float)(ps->next() % 20) - (float)10) / 10
138 main_direction *= (float)ps->range(0, 10) / 10;
142 s16 min_d = min_tunnel_diameter;
143 s16 max_d = max_tunnel_diameter;
144 rs = ps->range(min_d, max_d);
149 rs * part_max_length_rs,
150 rs * part_max_length_rs / 2,
151 rs * part_max_length_rs
155 rs * part_max_length_rs,
156 ps->range(1, rs * part_max_length_rs),
157 rs * part_max_length_rs
162 (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
163 (float)(ps->next() % (maxlen.Y * 1)) - (float)maxlen.Y / 2,
164 (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
167 // Jump downward sometimes
168 if (!large_cave && ps->range(0, 12) == 0) {
170 (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
171 (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
172 (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
176 vec += main_direction;
181 else if (rp.X >= ar.X)
184 if (rp.Y < route_y_min)
186 else if (rp.Y >= route_y_max)
187 rp.Y = route_y_max - 1;
191 else if (rp.Z >= ar.Z)
196 float veclen = vec.getLength();
197 // As odd as it sounds, veclen is *exactly* 0.0 sometimes, causing a FPE
201 // Every second section is rough
202 bool randomize_xz = (ps2->range(1, 2) == 1);
205 for (float f = 0; f < 1.0; f += 1.0 / veclen)
206 carveRoute(vec, f, randomize_xz);
212 void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz) {
213 MapNode airnode(CONTENT_AIR);
214 MapNode waternode(c_water_source);
215 MapNode lavanode(c_lava_source);
217 v3s16 startp(orp.X, orp.Y, orp.Z);
220 v3f fp = orp + vec * f;
221 fp.X += 0.1 * ps->range(-10, 10);
222 fp.Z += 0.1 * ps->range(-10, 10);
223 v3s16 cp(fp.X, fp.Y, fp.Z);
228 d0 += ps->range(-1, 1);
229 d1 += ps->range(-1, 1);
232 for (s16 z0 = d0; z0 <= d1; z0++) {
233 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
234 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
235 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
236 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
237 for (s16 y0 = -si2; y0 <= si2; y0++) {
238 if (large_cave_is_flat) {
239 // Make large caves not so tall
240 if (rs > 7 && abs(y0) >= rs / 3)
244 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
247 if (vm->m_area.contains(p) == false)
250 u32 i = vm->m_area.index(p);
251 content_t c = vm->m_data[i].getContent();
252 if (!ndef->get(c).is_ground_content)
256 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
257 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
259 if (flooded && full_ymin < water_level && full_ymax > water_level) {
260 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
261 } else if (flooded && full_ymax < water_level) {
262 vm->m_data[i] = (p.Y < startp.Y - 2) ? lavanode : airnode;
264 vm->m_data[i] = airnode;
267 // Don't replace air or water or lava or ignore
268 if (c == CONTENT_IGNORE || c == CONTENT_AIR ||
269 c == c_water_source || c == c_lava_source)
272 vm->m_data[i] = airnode;
273 vm->m_flags[i] |= VMANIP_FLAG_CAVE;
281 ///////////////////////////////////////// Caves V7
283 CaveV7::CaveV7(MapgenV7 *mg, PseudoRandom *ps, bool is_large_cave) {
286 this->ndef = mg->ndef;
287 this->water_level = mg->water_level;
288 this->large_cave = is_large_cave;
290 this->c_water_source = mg->c_water_source;
291 this->c_lava_source = mg->c_lava_source;
292 this->c_ice = mg->c_ice;
293 this->np_caveliquids = &nparams_caveliquids;
295 dswitchint = ps->range(1, 14);
296 flooded = ps->range(1, 2) == 2;
299 part_max_length_rs = ps->range(2, 4);
300 tunnel_routepoints = ps->range(5, ps->range(15, 30));
301 min_tunnel_diameter = 5;
302 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
304 part_max_length_rs = ps->range(2, 9);
305 tunnel_routepoints = ps->range(10, ps->range(15, 30));
306 min_tunnel_diameter = 2;
307 max_tunnel_diameter = ps->range(2, 6);
310 large_cave_is_flat = (ps->range(0, 1) == 0);
314 void CaveV7::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
317 max_stone_y = max_stone_height;
318 main_direction = v3f(0, 0, 0);
320 // Allowed route area size in nodes
321 ar = node_max - node_min + v3s16(1, 1, 1);
322 // Area starting point in nodes
326 //(this should be more than the maximum radius of the tunnel)
328 s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
329 ar += v3s16(1,0,1) * more * 2;
330 of -= v3s16(1,0,1) * more;
333 // Allow half a diameter + 7 over stone surface
334 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
336 // Limit maximum to area
337 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
341 if (node_min.Y < water_level && node_max.Y > water_level) {
342 min = water_level - max_tunnel_diameter/3 - of.Y;
343 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
345 route_y_min = ps->range(min, min + max_tunnel_diameter);
346 route_y_min = rangelim(route_y_min, 0, route_y_max);
349 s16 route_start_y_min = route_y_min;
350 s16 route_start_y_max = route_y_max;
352 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
353 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
355 // Randomize starting position
357 (float)(ps->next() % ar.X) + 0.5,
358 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
359 (float)(ps->next() % ar.Z) + 0.5
362 int notifytype = large_cave ? GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
363 if (mg->gennotify & (1 << notifytype)) {
364 std::vector <v3s16> *nvec = mg->gen_notifications[notifytype];
365 nvec->push_back(v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z));
368 // Generate some tunnel starting from orp
369 for (u16 j = 0; j < tunnel_routepoints; j++)
370 makeTunnel(j % dswitchint == 0);
372 notifytype = large_cave ? GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
373 if (mg->gennotify & (1 << notifytype)) {
374 std::vector <v3s16> *nvec = mg->gen_notifications[notifytype];
375 nvec->push_back(v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z));
380 void CaveV7::makeTunnel(bool dirswitch) {
381 if (dirswitch && !large_cave) {
382 main_direction = v3f(
383 ((float)(ps->next() % 20) - (float)10) / 10,
384 ((float)(ps->next() % 20) - (float)10) / 30,
385 ((float)(ps->next() % 20) - (float)10) / 10
387 main_direction *= (float)ps->range(0, 10) / 10;
391 s16 min_d = min_tunnel_diameter;
392 s16 max_d = max_tunnel_diameter;
393 rs = ps->range(min_d, max_d);
398 rs * part_max_length_rs,
399 rs * part_max_length_rs / 2,
400 rs * part_max_length_rs
404 rs * part_max_length_rs,
405 ps->range(1, rs * part_max_length_rs),
406 rs * part_max_length_rs
411 // Jump downward sometimes
412 if (!large_cave && ps->range(0, 12) == 0) {
414 (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
415 (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
416 (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
420 (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
421 (float)(ps->next() % (maxlen.Y * 1)) - (float)maxlen.Y / 2,
422 (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
426 // Do not make large caves that are above ground.
427 // It is only necessary to check the startpoint and endpoint.
429 v3s16 orpi(orp.X, orp.Y, orp.Z);
430 v3s16 veci(vec.X, vec.Y, vec.Z);
433 p = orpi + veci + of + rs / 2;
434 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
435 p.X >= node_min.X && p.X <= node_max.X) {
436 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
437 s16 h = mg->ridge_heightmap[index];
440 } else if (p.Y > water_level) {
441 return; // If it's not in our heightmap, use a simple heuristic
444 p = orpi + of + rs / 2;
445 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
446 p.X >= node_min.X && p.X <= node_max.X) {
447 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
448 s16 h = mg->ridge_heightmap[index];
451 } else if (p.Y > water_level) {
456 vec += main_direction;
461 else if (rp.X >= ar.X)
464 if (rp.Y < route_y_min)
466 else if (rp.Y >= route_y_max)
467 rp.Y = route_y_max - 1;
471 else if (rp.Z >= ar.Z)
476 float veclen = vec.getLength();
480 // Every second section is rough
481 bool randomize_xz = (ps->range(1, 2) == 1);
483 // Make a ravine every once in a while if it's long enough
484 //float xylen = vec.X * vec.X + vec.Z * vec.Z;
485 //disable ravines for now
486 bool is_ravine = false; //(xylen > 500.0) && !large_cave && (ps->range(1, 8) == 1);
489 for (float f = 0; f < 1.0; f += 1.0 / veclen)
490 carveRoute(vec, f, randomize_xz, is_ravine);
496 void CaveV7::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) {
497 MapNode airnode(CONTENT_AIR);
498 MapNode waternode(c_water_source);
499 MapNode lavanode(c_lava_source);
501 v3s16 startp(orp.X, orp.Y, orp.Z);
504 float nval = NoisePerlin3D(np_caveliquids, startp.X,
505 startp.Y, startp.Z, mg->seed);
506 MapNode liquidnode = nval < 0.40 ? lavanode : waternode;
508 v3f fp = orp + vec * f;
509 fp.X += 0.1 * ps->range(-10, 10);
510 fp.Z += 0.1 * ps->range(-10, 10);
511 v3s16 cp(fp.X, fp.Y, fp.Z);
516 d0 += ps->range(-1, 1);
517 d1 += ps->range(-1, 1);
520 bool flat_cave_floor = !large_cave && ps->range(0, 2) == 2;
521 bool should_make_cave_hole = ps->range(1, 10) == 1;
523 for (s16 z0 = d0; z0 <= d1; z0++) {
524 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
525 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
526 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
528 s16 si2 = is_ravine ? MYMIN(ps->range(25, 26), ar.Y) :
529 rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
531 for (s16 y0 = -si2; y0 <= si2; y0++) {
532 // Make better floors in small caves
533 if(flat_cave_floor && y0 <= -rs/2 && rs<=7)
536 if (large_cave_is_flat) {
537 // Make large caves not so tall
538 if (rs > 7 && abs(y0) >= rs / 3)
542 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
545 if (!is_ravine && mg->heightmap && should_make_cave_hole &&
546 p.X <= node_max.X && p.Z <= node_max.Z) {
547 int maplen = node_max.X - node_min.X + 1;
548 int idx = (p.Z - node_min.Z) * maplen + (p.X - node_min.X);
549 if (p.Y >= mg->heightmap[idx] - 2)
553 if (vm->m_area.contains(p) == false)
556 u32 i = vm->m_area.index(p);
558 // Don't replace air, water, lava, or ice
559 content_t c = vm->m_data[i].getContent();
560 if (!ndef->get(c).is_ground_content || c == CONTENT_AIR ||
561 c == c_water_source || c == c_lava_source || c == c_ice)
565 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
566 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
568 if (flooded && full_ymin < water_level && full_ymax > water_level)
569 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
570 else if (flooded && full_ymax < water_level)
571 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
573 vm->m_data[i] = airnode;
575 if (c == CONTENT_IGNORE)
578 vm->m_data[i] = airnode;
579 vm->m_flags[i] |= VMANIP_FLAG_CAVE;