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_v5.h"
24 #include "mapgen_v6.h"
25 #include "mapgen_v7.h"
28 NoiseParams nparams_caveliquids(0, 1, v3f(150.0, 150.0, 150.0), 776, 3, 0.6, 2.0);
31 ///////////////////////////////////////// Caves V5
34 CaveV5::CaveV5(MapgenV5 *mg, PseudoRandom *ps) {
37 this->ndef = mg->ndef;
38 this->water_level = mg->water_level;
40 this->c_water_source = mg->c_water_source;
41 this->c_lava_source = mg->c_lava_source;
42 this->c_ice = mg->c_ice;
43 this->np_caveliquids = &nparams_caveliquids;
45 dswitchint = ps->range(1, 14);
46 flooded = ps->range(1, 2) == 2;
48 part_max_length_rs = ps->range(2, 4);
49 tunnel_routepoints = ps->range(5, ps->range(15, 30));
50 min_tunnel_diameter = 5;
51 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
53 large_cave_is_flat = (ps->range(0, 1) == 0);
57 void CaveV5::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
60 main_direction = v3f(0, 0, 0);
62 // Allowed route area size in nodes
63 ar = node_max - node_min + v3s16(1, 1, 1);
64 // Area starting point in nodes
68 //(this should be more than the maximum radius of the tunnel)
70 s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
71 ar += v3s16(1,0,1) * more * 2;
72 of -= v3s16(1,0,1) * more;
75 // Allow half a diameter + 7 over stone surface
76 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
78 // Limit maximum to area
79 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
82 if (node_min.Y < water_level && node_max.Y > water_level) {
83 min = water_level - max_tunnel_diameter/3 - of.Y;
84 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
86 route_y_min = ps->range(min, min + max_tunnel_diameter);
87 route_y_min = rangelim(route_y_min, 0, route_y_max);
89 s16 route_start_y_min = route_y_min;
90 s16 route_start_y_max = route_y_max;
92 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
93 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
95 // Randomize starting position
97 (float)(ps->next() % ar.X) + 0.5,
98 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
99 (float)(ps->next() % ar.Z) + 0.5
102 // Add generation notify begin event
103 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
104 GenNotifyType notifytype = GENNOTIFY_LARGECAVE_BEGIN;
105 mg->gennotify.addEvent(notifytype, abs_pos);
107 // Generate some tunnel starting from orp
108 for (u16 j = 0; j < tunnel_routepoints; j++)
109 makeTunnel(j % dswitchint == 0);
111 // Add generation notify end event
112 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
113 notifytype = GENNOTIFY_LARGECAVE_END;
114 mg->gennotify.addEvent(notifytype, abs_pos);
118 void CaveV5::makeTunnel(bool dirswitch) {
121 s16 min_d = min_tunnel_diameter;
122 s16 max_d = max_tunnel_diameter;
123 rs = ps->range(min_d, max_d);
124 s16 rs_part_max_length_rs = rs * part_max_length_rs;
128 rs_part_max_length_rs,
129 rs_part_max_length_rs / 2,
130 rs_part_max_length_rs
134 // Jump downward sometimes
136 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
137 (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
138 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
141 // Do not make large caves that are above ground.
142 // It is only necessary to check the startpoint and endpoint.
143 v3s16 orpi(orp.X, orp.Y, orp.Z);
144 v3s16 veci(vec.X, vec.Y, vec.Z);
147 p = orpi + veci + of + rs / 2;
148 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
149 p.X >= node_min.X && p.X <= node_max.X) {
150 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
151 s16 h = mg->heightmap[index];
154 } else if (p.Y > water_level) {
155 return; // If it's not in our heightmap, use a simple heuristic
158 p = orpi + of + rs / 2;
159 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
160 p.X >= node_min.X && p.X <= node_max.X) {
161 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
162 s16 h = mg->heightmap[index];
165 } else if (p.Y > water_level) {
169 vec += main_direction;
174 else if (rp.X >= ar.X)
177 if (rp.Y < route_y_min)
179 else if (rp.Y >= route_y_max)
180 rp.Y = route_y_max - 1;
184 else if (rp.Z >= ar.Z)
189 float veclen = vec.getLength();
193 // Every second section is rough
194 bool randomize_xz = (ps->range(1, 2) == 1);
196 // Make a ravine every once in a while if it's long enough
197 //float xylen = vec.X * vec.X + vec.Z * vec.Z;
198 //disable ravines for now
199 bool is_ravine = false; //(xylen > 500.0) && !large_cave && (ps->range(1, 8) == 1);
202 for (float f = 0; f < 1.0; f += 1.0 / veclen)
203 carveRoute(vec, f, randomize_xz, is_ravine);
209 void CaveV5::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) {
210 MapNode airnode(CONTENT_AIR);
211 MapNode waternode(c_water_source);
212 MapNode lavanode(c_lava_source);
214 v3s16 startp(orp.X, orp.Y, orp.Z);
217 float nval = NoisePerlin3D(np_caveliquids, startp.X,
218 startp.Y, startp.Z, mg->seed);
219 MapNode liquidnode = nval < 0.40 ? lavanode : waternode;
221 v3f fp = orp + vec * f;
222 fp.X += 0.1 * ps->range(-10, 10);
223 fp.Z += 0.1 * ps->range(-10, 10);
224 v3s16 cp(fp.X, fp.Y, fp.Z);
229 d0 += ps->range(-1, 1);
230 d1 += ps->range(-1, 1);
233 bool should_make_cave_hole = ps->range(1, 10) == 1;
235 for (s16 z0 = d0; z0 <= d1; z0++) {
236 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
237 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
238 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
240 s16 si2 = is_ravine ? MYMIN(ps->range(25, 26), ar.Y) :
241 rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
243 for (s16 y0 = -si2; y0 <= si2; y0++) {
244 if (large_cave_is_flat) {
245 // Make large caves not so tall
246 if (rs > 7 && abs(y0) >= rs / 3)
250 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
253 if (!is_ravine && mg->heightmap && should_make_cave_hole &&
254 p.X <= node_max.X && p.Z <= node_max.Z) {
255 int maplen = node_max.X - node_min.X + 1;
256 int idx = (p.Z - node_min.Z) * maplen + (p.X - node_min.X);
257 if (p.Y >= mg->heightmap[idx] - 2)
261 if (vm->m_area.contains(p) == false)
264 u32 i = vm->m_area.index(p);
266 // Don't replace air, water, lava, or ice
267 content_t c = vm->m_data[i].getContent();
268 if (!ndef->get(c).is_ground_content || c == CONTENT_AIR ||
269 c == c_water_source || c == c_lava_source || c == c_ice)
272 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
273 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
275 if (flooded && full_ymin < water_level && full_ymax > water_level)
276 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
277 else if (flooded && full_ymax < water_level)
278 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
280 vm->m_data[i] = airnode;
287 ///////////////////////////////////////// Caves V6
290 CaveV6::CaveV6(MapgenV6 *mg, PseudoRandom *ps, PseudoRandom *ps2, bool is_large_cave) {
293 this->ndef = mg->ndef;
294 this->water_level = mg->water_level;
295 this->large_cave = is_large_cave;
298 this->c_water_source = mg->c_water_source;
299 this->c_lava_source = mg->c_lava_source;
301 min_tunnel_diameter = 2;
302 max_tunnel_diameter = ps->range(2, 6);
303 dswitchint = ps->range(1, 14);
307 part_max_length_rs = ps->range(2,4);
308 tunnel_routepoints = ps->range(5, ps->range(15,30));
309 min_tunnel_diameter = 5;
310 max_tunnel_diameter = ps->range(7, ps->range(8,24));
312 part_max_length_rs = ps->range(2,9);
313 tunnel_routepoints = ps->range(10, ps->range(15,30));
316 large_cave_is_flat = (ps->range(0,1) == 0);
320 void CaveV6::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
323 max_stone_y = max_stone_height;
324 main_direction = v3f(0, 0, 0);
326 // Allowed route area size in nodes
327 ar = node_max - node_min + v3s16(1, 1, 1);
328 // Area starting point in nodes
332 //(this should be more than the maximum radius of the tunnel)
333 const s16 max_spread_amount = MAP_BLOCKSIZE;
335 s16 more = MYMAX(max_spread_amount - max_tunnel_diameter / 2 - insure, 1);
336 ar += v3s16(1,0,1) * more * 2;
337 of -= v3s16(1,0,1) * more;
340 // Allow half a diameter + 7 over stone surface
341 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
343 // Limit maximum to area
344 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
348 if (node_min.Y < water_level && node_max.Y > water_level) {
349 min = water_level - max_tunnel_diameter/3 - of.Y;
350 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
352 route_y_min = ps->range(min, min + max_tunnel_diameter);
353 route_y_min = rangelim(route_y_min, 0, route_y_max);
356 s16 route_start_y_min = route_y_min;
357 s16 route_start_y_max = route_y_max;
359 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y-1);
360 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y-1);
362 // Randomize starting position
364 (float)(ps->next() % ar.X) + 0.5,
365 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
366 (float)(ps->next() % ar.Z) + 0.5
369 // Add generation notify begin event
370 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
371 GenNotifyType notifytype = large_cave ?
372 GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
373 mg->gennotify.addEvent(notifytype, abs_pos);
375 // Generate some tunnel starting from orp
376 for (u16 j = 0; j < tunnel_routepoints; j++)
377 makeTunnel(j % dswitchint == 0);
379 // Add generation notify end event
380 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
381 notifytype = large_cave ?
382 GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
383 mg->gennotify.addEvent(notifytype, abs_pos);
387 void CaveV6::makeTunnel(bool dirswitch) {
388 if (dirswitch && !large_cave) {
389 main_direction = v3f(
390 ((float)(ps->next() % 20) - (float)10) / 10,
391 ((float)(ps->next() % 20) - (float)10) / 30,
392 ((float)(ps->next() % 20) - (float)10) / 10
394 main_direction *= (float)ps->range(0, 10) / 10;
398 s16 min_d = min_tunnel_diameter;
399 s16 max_d = max_tunnel_diameter;
400 rs = ps->range(min_d, max_d);
401 s16 rs_part_max_length_rs = rs * part_max_length_rs;
406 rs_part_max_length_rs,
407 rs_part_max_length_rs / 2,
408 rs_part_max_length_rs
412 rs_part_max_length_rs,
413 ps->range(1, rs_part_max_length_rs),
414 rs_part_max_length_rs
419 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
420 (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
421 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
424 // Jump downward sometimes
425 if (!large_cave && ps->range(0, 12) == 0) {
427 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
428 (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
429 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
433 // Do not make large caves that are entirely above ground.
434 // It is only necessary to check the startpoint and endpoint.
436 v3s16 orpi(orp.X, orp.Y, orp.Z);
437 v3s16 veci(vec.X, vec.Y, vec.Z);
441 v3s16 p1 = orpi + veci + of + rs / 2;
442 if (p1.Z >= node_min.Z && p1.Z <= node_max.Z &&
443 p1.X >= node_min.X && p1.X <= node_max.X) {
444 u32 index1 = (p1.Z - node_min.Z) * mg->ystride + (p1.X - node_min.X);
445 h1 = mg->heightmap[index1];
447 h1 = water_level; // If not in heightmap
450 v3s16 p2 = orpi + of + rs / 2;
451 if (p2.Z >= node_min.Z && p2.Z <= node_max.Z &&
452 p2.X >= node_min.X && p2.X <= node_max.X) {
453 u32 index2 = (p2.Z - node_min.Z) * mg->ystride + (p2.X - node_min.X);
454 h2 = mg->heightmap[index2];
459 if (p1.Y > h1 && p2.Y > h2) // If startpoint and endpoint are above ground
463 vec += main_direction;
468 else if (rp.X >= ar.X)
471 if (rp.Y < route_y_min)
473 else if (rp.Y >= route_y_max)
474 rp.Y = route_y_max - 1;
478 else if (rp.Z >= ar.Z)
483 float veclen = vec.getLength();
484 // As odd as it sounds, veclen is *exactly* 0.0 sometimes, causing a FPE
488 // Every second section is rough
489 bool randomize_xz = (ps2->range(1, 2) == 1);
492 for (float f = 0; f < 1.0; f += 1.0 / veclen)
493 carveRoute(vec, f, randomize_xz);
499 void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz) {
500 MapNode airnode(CONTENT_AIR);
501 MapNode waternode(c_water_source);
502 MapNode lavanode(c_lava_source);
504 v3s16 startp(orp.X, orp.Y, orp.Z);
507 v3f fp = orp + vec * f;
508 fp.X += 0.1 * ps->range(-10, 10);
509 fp.Z += 0.1 * ps->range(-10, 10);
510 v3s16 cp(fp.X, fp.Y, fp.Z);
515 d0 += ps->range(-1, 1);
516 d1 += ps->range(-1, 1);
519 for (s16 z0 = d0; z0 <= d1; z0++) {
520 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
521 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
522 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
523 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
524 for (s16 y0 = -si2; y0 <= si2; y0++) {
525 if (large_cave_is_flat) {
526 // Make large caves not so tall
527 if (rs > 7 && abs(y0) >= rs / 3)
531 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
534 if (vm->m_area.contains(p) == false)
537 u32 i = vm->m_area.index(p);
538 content_t c = vm->m_data[i].getContent();
539 if (!ndef->get(c).is_ground_content)
543 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
544 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
546 if (flooded && full_ymin < water_level && full_ymax > water_level) {
547 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
548 } else if (flooded && full_ymax < water_level) {
549 vm->m_data[i] = (p.Y < startp.Y - 2) ? lavanode : airnode;
551 vm->m_data[i] = airnode;
554 // Don't replace air or water or lava or ignore
555 if (c == CONTENT_IGNORE || c == CONTENT_AIR ||
556 c == c_water_source || c == c_lava_source)
559 vm->m_data[i] = airnode;
560 vm->m_flags[i] |= VMANIP_FLAG_CAVE;
568 ///////////////////////////////////////// Caves V7
571 CaveV7::CaveV7(MapgenV7 *mg, PseudoRandom *ps) {
574 this->ndef = mg->ndef;
575 this->water_level = mg->water_level;
577 this->c_water_source = mg->c_water_source;
578 this->c_lava_source = mg->c_lava_source;
579 this->c_ice = mg->c_ice;
580 this->np_caveliquids = &nparams_caveliquids;
582 dswitchint = ps->range(1, 14);
583 flooded = ps->range(1, 2) == 2;
585 part_max_length_rs = ps->range(2, 4);
586 tunnel_routepoints = ps->range(5, ps->range(15, 30));
587 min_tunnel_diameter = 5;
588 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
590 large_cave_is_flat = (ps->range(0, 1) == 0);
594 void CaveV7::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
597 max_stone_y = max_stone_height;
598 main_direction = v3f(0, 0, 0);
600 // Allowed route area size in nodes
601 ar = node_max - node_min + v3s16(1, 1, 1);
602 // Area starting point in nodes
606 //(this should be more than the maximum radius of the tunnel)
608 s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
609 ar += v3s16(1,0,1) * more * 2;
610 of -= v3s16(1,0,1) * more;
613 // Allow half a diameter + 7 over stone surface
614 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
616 // Limit maximum to area
617 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
620 if (node_min.Y < water_level && node_max.Y > water_level) {
621 min = water_level - max_tunnel_diameter/3 - of.Y;
622 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
624 route_y_min = ps->range(min, min + max_tunnel_diameter);
625 route_y_min = rangelim(route_y_min, 0, route_y_max);
627 s16 route_start_y_min = route_y_min;
628 s16 route_start_y_max = route_y_max;
630 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
631 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
633 // Randomize starting position
635 (float)(ps->next() % ar.X) + 0.5,
636 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
637 (float)(ps->next() % ar.Z) + 0.5
640 // Add generation notify begin event
641 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
642 GenNotifyType notifytype = GENNOTIFY_LARGECAVE_BEGIN;
643 mg->gennotify.addEvent(notifytype, abs_pos);
645 // Generate some tunnel starting from orp
646 for (u16 j = 0; j < tunnel_routepoints; j++)
647 makeTunnel(j % dswitchint == 0);
649 // Add generation notify end event
650 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
651 notifytype = GENNOTIFY_LARGECAVE_END;
652 mg->gennotify.addEvent(notifytype, abs_pos);
656 void CaveV7::makeTunnel(bool dirswitch) {
659 s16 min_d = min_tunnel_diameter;
660 s16 max_d = max_tunnel_diameter;
661 rs = ps->range(min_d, max_d);
662 s16 rs_part_max_length_rs = rs * part_max_length_rs;
666 rs_part_max_length_rs,
667 rs_part_max_length_rs / 2,
668 rs_part_max_length_rs
672 // Jump downward sometimes
674 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
675 (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
676 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
679 // Do not make large caves that are above ground.
680 // It is only necessary to check the startpoint and endpoint.
681 v3s16 orpi(orp.X, orp.Y, orp.Z);
682 v3s16 veci(vec.X, vec.Y, vec.Z);
685 p = orpi + veci + of + rs / 2;
686 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
687 p.X >= node_min.X && p.X <= node_max.X) {
688 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
689 s16 h = mg->ridge_heightmap[index];
692 } else if (p.Y > water_level) {
693 return; // If it's not in our heightmap, use a simple heuristic
696 p = orpi + of + rs / 2;
697 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
698 p.X >= node_min.X && p.X <= node_max.X) {
699 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
700 s16 h = mg->ridge_heightmap[index];
703 } else if (p.Y > water_level) {
707 vec += main_direction;
712 else if (rp.X >= ar.X)
715 if (rp.Y < route_y_min)
717 else if (rp.Y >= route_y_max)
718 rp.Y = route_y_max - 1;
722 else if (rp.Z >= ar.Z)
727 float veclen = vec.getLength();
731 // Every second section is rough
732 bool randomize_xz = (ps->range(1, 2) == 1);
734 // Make a ravine every once in a while if it's long enough
735 //float xylen = vec.X * vec.X + vec.Z * vec.Z;
736 //disable ravines for now
737 bool is_ravine = false; //(xylen > 500.0) && !large_cave && (ps->range(1, 8) == 1);
740 for (float f = 0; f < 1.0; f += 1.0 / veclen)
741 carveRoute(vec, f, randomize_xz, is_ravine);
747 void CaveV7::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) {
748 MapNode airnode(CONTENT_AIR);
749 MapNode waternode(c_water_source);
750 MapNode lavanode(c_lava_source);
752 v3s16 startp(orp.X, orp.Y, orp.Z);
755 float nval = NoisePerlin3D(np_caveliquids, startp.X,
756 startp.Y, startp.Z, mg->seed);
757 MapNode liquidnode = (nval < 0.40 && node_max.Y < -256) ? lavanode : waternode;
759 v3f fp = orp + vec * f;
760 fp.X += 0.1 * ps->range(-10, 10);
761 fp.Z += 0.1 * ps->range(-10, 10);
762 v3s16 cp(fp.X, fp.Y, fp.Z);
767 d0 += ps->range(-1, 1);
768 d1 += ps->range(-1, 1);
771 bool should_make_cave_hole = ps->range(1, 10) == 1;
773 for (s16 z0 = d0; z0 <= d1; z0++) {
774 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
775 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
776 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
778 s16 si2 = is_ravine ? MYMIN(ps->range(25, 26), ar.Y) :
779 rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
781 for (s16 y0 = -si2; y0 <= si2; y0++) {
782 if (large_cave_is_flat) {
783 // Make large caves not so tall
784 if (rs > 7 && abs(y0) >= rs / 3)
788 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
791 if (!is_ravine && mg->heightmap && should_make_cave_hole &&
792 p.X <= node_max.X && p.Z <= node_max.Z) {
793 int maplen = node_max.X - node_min.X + 1;
794 int idx = (p.Z - node_min.Z) * maplen + (p.X - node_min.X);
795 if (p.Y >= mg->heightmap[idx] - 2)
799 if (vm->m_area.contains(p) == false)
802 u32 i = vm->m_area.index(p);
804 // Don't replace air, water, lava, or ice
805 content_t c = vm->m_data[i].getContent();
806 if (!ndef->get(c).is_ground_content || c == CONTENT_AIR ||
807 c == c_water_source || c == c_lava_source || c == c_ice)
810 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
811 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
813 if (flooded && full_ymin < water_level && full_ymax > water_level)
814 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
815 else if (flooded && full_ymax < water_level)
816 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
818 vm->m_data[i] = airnode;