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);
265 content_t c = vm->m_data[i].getContent();
266 if (!ndef->get(c).is_ground_content)
269 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
270 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
272 if (flooded && full_ymin < water_level && full_ymax > water_level)
273 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
274 else if (flooded && full_ymax < water_level)
275 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
277 vm->m_data[i] = airnode;
284 ///////////////////////////////////////// Caves V6
287 CaveV6::CaveV6(MapgenV6 *mg, PseudoRandom *ps, PseudoRandom *ps2, bool is_large_cave) {
290 this->ndef = mg->ndef;
291 this->water_level = mg->water_level;
292 this->large_cave = is_large_cave;
295 this->c_water_source = mg->c_water_source;
296 this->c_lava_source = mg->c_lava_source;
298 min_tunnel_diameter = 2;
299 max_tunnel_diameter = ps->range(2, 6);
300 dswitchint = ps->range(1, 14);
304 part_max_length_rs = ps->range(2,4);
305 tunnel_routepoints = ps->range(5, ps->range(15,30));
306 min_tunnel_diameter = 5;
307 max_tunnel_diameter = ps->range(7, ps->range(8,24));
309 part_max_length_rs = ps->range(2,9);
310 tunnel_routepoints = ps->range(10, ps->range(15,30));
313 large_cave_is_flat = (ps->range(0,1) == 0);
317 void CaveV6::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
320 max_stone_y = max_stone_height;
321 main_direction = v3f(0, 0, 0);
323 // Allowed route area size in nodes
324 ar = node_max - node_min + v3s16(1, 1, 1);
325 // Area starting point in nodes
329 //(this should be more than the maximum radius of the tunnel)
330 const s16 max_spread_amount = MAP_BLOCKSIZE;
332 s16 more = MYMAX(max_spread_amount - max_tunnel_diameter / 2 - insure, 1);
333 ar += v3s16(1,0,1) * more * 2;
334 of -= v3s16(1,0,1) * more;
337 // Allow half a diameter + 7 over stone surface
338 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
340 // Limit maximum to area
341 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
345 if (node_min.Y < water_level && node_max.Y > water_level) {
346 min = water_level - max_tunnel_diameter/3 - of.Y;
347 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
349 route_y_min = ps->range(min, min + max_tunnel_diameter);
350 route_y_min = rangelim(route_y_min, 0, route_y_max);
353 s16 route_start_y_min = route_y_min;
354 s16 route_start_y_max = route_y_max;
356 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y-1);
357 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y-1);
359 // Randomize starting position
361 (float)(ps->next() % ar.X) + 0.5,
362 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
363 (float)(ps->next() % ar.Z) + 0.5
366 // Add generation notify begin event
367 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
368 GenNotifyType notifytype = large_cave ?
369 GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
370 mg->gennotify.addEvent(notifytype, abs_pos);
372 // Generate some tunnel starting from orp
373 for (u16 j = 0; j < tunnel_routepoints; j++)
374 makeTunnel(j % dswitchint == 0);
376 // Add generation notify end event
377 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
378 notifytype = large_cave ?
379 GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
380 mg->gennotify.addEvent(notifytype, abs_pos);
384 void CaveV6::makeTunnel(bool dirswitch) {
385 if (dirswitch && !large_cave) {
386 main_direction = v3f(
387 ((float)(ps->next() % 20) - (float)10) / 10,
388 ((float)(ps->next() % 20) - (float)10) / 30,
389 ((float)(ps->next() % 20) - (float)10) / 10
391 main_direction *= (float)ps->range(0, 10) / 10;
395 s16 min_d = min_tunnel_diameter;
396 s16 max_d = max_tunnel_diameter;
397 rs = ps->range(min_d, max_d);
398 s16 rs_part_max_length_rs = rs * part_max_length_rs;
403 rs_part_max_length_rs,
404 rs_part_max_length_rs / 2,
405 rs_part_max_length_rs
409 rs_part_max_length_rs,
410 ps->range(1, rs_part_max_length_rs),
411 rs_part_max_length_rs
416 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
417 (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
418 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
421 // Jump downward sometimes
422 if (!large_cave && ps->range(0, 12) == 0) {
424 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
425 (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
426 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
430 // Do not make large caves that are entirely above ground.
431 // It is only necessary to check the startpoint and endpoint.
433 v3s16 orpi(orp.X, orp.Y, orp.Z);
434 v3s16 veci(vec.X, vec.Y, vec.Z);
438 v3s16 p1 = orpi + veci + of + rs / 2;
439 if (p1.Z >= node_min.Z && p1.Z <= node_max.Z &&
440 p1.X >= node_min.X && p1.X <= node_max.X) {
441 u32 index1 = (p1.Z - node_min.Z) * mg->ystride + (p1.X - node_min.X);
442 h1 = mg->heightmap[index1];
444 h1 = water_level; // If not in heightmap
447 v3s16 p2 = orpi + of + rs / 2;
448 if (p2.Z >= node_min.Z && p2.Z <= node_max.Z &&
449 p2.X >= node_min.X && p2.X <= node_max.X) {
450 u32 index2 = (p2.Z - node_min.Z) * mg->ystride + (p2.X - node_min.X);
451 h2 = mg->heightmap[index2];
456 if (p1.Y > h1 && p2.Y > h2) // If startpoint and endpoint are above ground
460 vec += main_direction;
465 else if (rp.X >= ar.X)
468 if (rp.Y < route_y_min)
470 else if (rp.Y >= route_y_max)
471 rp.Y = route_y_max - 1;
475 else if (rp.Z >= ar.Z)
480 float veclen = vec.getLength();
481 // As odd as it sounds, veclen is *exactly* 0.0 sometimes, causing a FPE
485 // Every second section is rough
486 bool randomize_xz = (ps2->range(1, 2) == 1);
489 for (float f = 0; f < 1.0; f += 1.0 / veclen)
490 carveRoute(vec, f, randomize_xz);
496 void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz) {
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 v3f fp = orp + vec * f;
505 fp.X += 0.1 * ps->range(-10, 10);
506 fp.Z += 0.1 * ps->range(-10, 10);
507 v3s16 cp(fp.X, fp.Y, fp.Z);
512 d0 += ps->range(-1, 1);
513 d1 += ps->range(-1, 1);
516 for (s16 z0 = d0; z0 <= d1; z0++) {
517 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
518 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
519 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
520 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
521 for (s16 y0 = -si2; y0 <= si2; y0++) {
522 if (large_cave_is_flat) {
523 // Make large caves not so tall
524 if (rs > 7 && abs(y0) >= rs / 3)
528 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
531 if (vm->m_area.contains(p) == false)
534 u32 i = vm->m_area.index(p);
535 content_t c = vm->m_data[i].getContent();
536 if (!ndef->get(c).is_ground_content)
540 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
541 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
543 if (flooded && full_ymin < water_level && full_ymax > water_level) {
544 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
545 } else if (flooded && full_ymax < water_level) {
546 vm->m_data[i] = (p.Y < startp.Y - 2) ? lavanode : airnode;
548 vm->m_data[i] = airnode;
551 if (c == CONTENT_IGNORE || c == CONTENT_AIR)
554 vm->m_data[i] = airnode;
555 vm->m_flags[i] |= VMANIP_FLAG_CAVE;
563 ///////////////////////////////////////// Caves V7
566 CaveV7::CaveV7(MapgenV7 *mg, PseudoRandom *ps) {
569 this->ndef = mg->ndef;
570 this->water_level = mg->water_level;
572 this->c_water_source = mg->c_water_source;
573 this->c_lava_source = mg->c_lava_source;
574 this->c_ice = mg->c_ice;
575 this->np_caveliquids = &nparams_caveliquids;
577 dswitchint = ps->range(1, 14);
578 flooded = ps->range(1, 2) == 2;
580 part_max_length_rs = ps->range(2, 4);
581 tunnel_routepoints = ps->range(5, ps->range(15, 30));
582 min_tunnel_diameter = 5;
583 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
585 large_cave_is_flat = (ps->range(0, 1) == 0);
589 void CaveV7::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
592 max_stone_y = max_stone_height;
593 main_direction = v3f(0, 0, 0);
595 // Allowed route area size in nodes
596 ar = node_max - node_min + v3s16(1, 1, 1);
597 // Area starting point in nodes
601 //(this should be more than the maximum radius of the tunnel)
603 s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
604 ar += v3s16(1,0,1) * more * 2;
605 of -= v3s16(1,0,1) * more;
608 // Allow half a diameter + 7 over stone surface
609 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
611 // Limit maximum to area
612 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
615 if (node_min.Y < water_level && node_max.Y > water_level) {
616 min = water_level - max_tunnel_diameter/3 - of.Y;
617 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
619 route_y_min = ps->range(min, min + max_tunnel_diameter);
620 route_y_min = rangelim(route_y_min, 0, route_y_max);
622 s16 route_start_y_min = route_y_min;
623 s16 route_start_y_max = route_y_max;
625 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
626 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
628 // Randomize starting position
630 (float)(ps->next() % ar.X) + 0.5,
631 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
632 (float)(ps->next() % ar.Z) + 0.5
635 // Add generation notify begin event
636 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
637 GenNotifyType notifytype = GENNOTIFY_LARGECAVE_BEGIN;
638 mg->gennotify.addEvent(notifytype, abs_pos);
640 // Generate some tunnel starting from orp
641 for (u16 j = 0; j < tunnel_routepoints; j++)
642 makeTunnel(j % dswitchint == 0);
644 // Add generation notify end event
645 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
646 notifytype = GENNOTIFY_LARGECAVE_END;
647 mg->gennotify.addEvent(notifytype, abs_pos);
651 void CaveV7::makeTunnel(bool dirswitch) {
654 s16 min_d = min_tunnel_diameter;
655 s16 max_d = max_tunnel_diameter;
656 rs = ps->range(min_d, max_d);
657 s16 rs_part_max_length_rs = rs * part_max_length_rs;
661 rs_part_max_length_rs,
662 rs_part_max_length_rs / 2,
663 rs_part_max_length_rs
667 // Jump downward sometimes
669 (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
670 (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
671 (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
674 // Do not make large caves that are above ground.
675 // It is only necessary to check the startpoint and endpoint.
676 v3s16 orpi(orp.X, orp.Y, orp.Z);
677 v3s16 veci(vec.X, vec.Y, vec.Z);
680 p = orpi + veci + of + rs / 2;
681 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
682 p.X >= node_min.X && p.X <= node_max.X) {
683 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
684 s16 h = mg->ridge_heightmap[index];
687 } else if (p.Y > water_level) {
688 return; // If it's not in our heightmap, use a simple heuristic
691 p = orpi + of + rs / 2;
692 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
693 p.X >= node_min.X && p.X <= node_max.X) {
694 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
695 s16 h = mg->ridge_heightmap[index];
698 } else if (p.Y > water_level) {
702 vec += main_direction;
707 else if (rp.X >= ar.X)
710 if (rp.Y < route_y_min)
712 else if (rp.Y >= route_y_max)
713 rp.Y = route_y_max - 1;
717 else if (rp.Z >= ar.Z)
722 float veclen = vec.getLength();
726 // Every second section is rough
727 bool randomize_xz = (ps->range(1, 2) == 1);
729 // Make a ravine every once in a while if it's long enough
730 //float xylen = vec.X * vec.X + vec.Z * vec.Z;
731 //disable ravines for now
732 bool is_ravine = false; //(xylen > 500.0) && !large_cave && (ps->range(1, 8) == 1);
735 for (float f = 0; f < 1.0; f += 1.0 / veclen)
736 carveRoute(vec, f, randomize_xz, is_ravine);
742 void CaveV7::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) {
743 MapNode airnode(CONTENT_AIR);
744 MapNode waternode(c_water_source);
745 MapNode lavanode(c_lava_source);
747 v3s16 startp(orp.X, orp.Y, orp.Z);
750 float nval = NoisePerlin3D(np_caveliquids, startp.X,
751 startp.Y, startp.Z, mg->seed);
752 MapNode liquidnode = (nval < 0.40 && node_max.Y < -256) ? lavanode : waternode;
754 v3f fp = orp + vec * f;
755 fp.X += 0.1 * ps->range(-10, 10);
756 fp.Z += 0.1 * ps->range(-10, 10);
757 v3s16 cp(fp.X, fp.Y, fp.Z);
762 d0 += ps->range(-1, 1);
763 d1 += ps->range(-1, 1);
766 bool should_make_cave_hole = ps->range(1, 10) == 1;
768 for (s16 z0 = d0; z0 <= d1; z0++) {
769 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
770 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
771 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
773 s16 si2 = is_ravine ? MYMIN(ps->range(25, 26), ar.Y) :
774 rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
776 for (s16 y0 = -si2; y0 <= si2; y0++) {
777 if (large_cave_is_flat) {
778 // Make large caves not so tall
779 if (rs > 7 && abs(y0) >= rs / 3)
783 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
786 if (!is_ravine && mg->heightmap && should_make_cave_hole &&
787 p.X <= node_max.X && p.Z <= node_max.Z) {
788 int maplen = node_max.X - node_min.X + 1;
789 int idx = (p.Z - node_min.Z) * maplen + (p.X - node_min.X);
790 if (p.Y >= mg->heightmap[idx] - 2)
794 if (vm->m_area.contains(p) == false)
797 u32 i = vm->m_area.index(p);
798 content_t c = vm->m_data[i].getContent();
799 if (!ndef->get(c).is_ground_content)
802 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
803 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
805 if (flooded && full_ymin < water_level && full_ymax > water_level)
806 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
807 else if (flooded && full_ymax < water_level)
808 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
810 vm->m_data[i] = airnode;