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 ///////////////////////////////////////////////////////////////////////////////
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 // Add generation notify begin event
114 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
115 GenNotifyType notifytype = large_cave ?
116 GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
117 mg->gennotify.addEvent(notifytype, abs_pos);
119 // Generate some tunnel starting from orp
120 for (u16 j = 0; j < tunnel_routepoints; j++)
121 makeTunnel(j % dswitchint == 0);
123 // Add generation notify end event
124 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
125 notifytype = large_cave ?
126 GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
127 mg->gennotify.addEvent(notifytype, abs_pos);
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 // Do not make large caves that are entirely above ground.
177 // It is only necessary to check the startpoint and endpoint.
179 v3s16 orpi(orp.X, orp.Y, orp.Z);
180 v3s16 veci(vec.X, vec.Y, vec.Z);
184 v3s16 p1 = orpi + veci + of + rs / 2;
185 if (p1.Z >= node_min.Z && p1.Z <= node_max.Z &&
186 p1.X >= node_min.X && p1.X <= node_max.X) {
187 u32 index1 = (p1.Z - node_min.Z) * mg->ystride + (p1.X - node_min.X);
188 h1 = mg->heightmap[index1];
190 h1 = water_level; // If not in heightmap
193 v3s16 p2 = orpi + of + rs / 2;
194 if (p2.Z >= node_min.Z && p2.Z <= node_max.Z &&
195 p2.X >= node_min.X && p2.X <= node_max.X) {
196 u32 index2 = (p2.Z - node_min.Z) * mg->ystride + (p2.X - node_min.X);
197 h2 = mg->heightmap[index2];
202 if (p1.Y > h1 && p2.Y > h2) // If startpoint and endpoint are above ground
206 vec += main_direction;
211 else if (rp.X >= ar.X)
214 if (rp.Y < route_y_min)
216 else if (rp.Y >= route_y_max)
217 rp.Y = route_y_max - 1;
221 else if (rp.Z >= ar.Z)
226 float veclen = vec.getLength();
227 // As odd as it sounds, veclen is *exactly* 0.0 sometimes, causing a FPE
231 // Every second section is rough
232 bool randomize_xz = (ps2->range(1, 2) == 1);
235 for (float f = 0; f < 1.0; f += 1.0 / veclen)
236 carveRoute(vec, f, randomize_xz);
242 void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz) {
243 MapNode airnode(CONTENT_AIR);
244 MapNode waternode(c_water_source);
245 MapNode lavanode(c_lava_source);
247 v3s16 startp(orp.X, orp.Y, orp.Z);
250 v3f fp = orp + vec * f;
251 fp.X += 0.1 * ps->range(-10, 10);
252 fp.Z += 0.1 * ps->range(-10, 10);
253 v3s16 cp(fp.X, fp.Y, fp.Z);
258 d0 += ps->range(-1, 1);
259 d1 += ps->range(-1, 1);
262 for (s16 z0 = d0; z0 <= d1; z0++) {
263 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
264 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
265 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
266 s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
267 for (s16 y0 = -si2; y0 <= si2; y0++) {
268 if (large_cave_is_flat) {
269 // Make large caves not so tall
270 if (rs > 7 && abs(y0) >= rs / 3)
274 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
277 if (vm->m_area.contains(p) == false)
280 u32 i = vm->m_area.index(p);
281 content_t c = vm->m_data[i].getContent();
282 if (!ndef->get(c).is_ground_content)
286 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
287 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
289 if (flooded && full_ymin < water_level && full_ymax > water_level) {
290 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
291 } else if (flooded && full_ymax < water_level) {
292 vm->m_data[i] = (p.Y < startp.Y - 2) ? lavanode : airnode;
294 vm->m_data[i] = airnode;
297 // Don't replace air or water or lava or ignore
298 if (c == CONTENT_IGNORE || c == CONTENT_AIR ||
299 c == c_water_source || c == c_lava_source)
302 vm->m_data[i] = airnode;
303 vm->m_flags[i] |= VMANIP_FLAG_CAVE;
311 ///////////////////////////////////////// Caves V7
314 CaveV7::CaveV7(MapgenV7 *mg, PseudoRandom *ps, bool is_large_cave) {
317 this->ndef = mg->ndef;
318 this->water_level = mg->water_level;
319 this->large_cave = is_large_cave;
321 this->c_water_source = mg->c_water_source;
322 this->c_lava_source = mg->c_lava_source;
323 this->c_ice = mg->c_ice;
324 this->np_caveliquids = &nparams_caveliquids;
326 dswitchint = ps->range(1, 14);
327 flooded = ps->range(1, 2) == 2;
330 part_max_length_rs = ps->range(2, 4);
331 tunnel_routepoints = ps->range(5, ps->range(15, 30));
332 min_tunnel_diameter = 5;
333 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
335 part_max_length_rs = ps->range(2, 9);
336 tunnel_routepoints = ps->range(10, ps->range(15, 30));
337 min_tunnel_diameter = 2;
338 max_tunnel_diameter = ps->range(2, 6);
341 large_cave_is_flat = (ps->range(0, 1) == 0);
345 void CaveV7::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
348 max_stone_y = max_stone_height;
349 main_direction = v3f(0, 0, 0);
351 // Allowed route area size in nodes
352 ar = node_max - node_min + v3s16(1, 1, 1);
353 // Area starting point in nodes
357 //(this should be more than the maximum radius of the tunnel)
359 s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
360 ar += v3s16(1,0,1) * more * 2;
361 of -= v3s16(1,0,1) * more;
364 // Allow half a diameter + 7 over stone surface
365 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
367 // Limit maximum to area
368 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
372 if (node_min.Y < water_level && node_max.Y > water_level) {
373 min = water_level - max_tunnel_diameter/3 - of.Y;
374 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
376 route_y_min = ps->range(min, min + max_tunnel_diameter);
377 route_y_min = rangelim(route_y_min, 0, route_y_max);
380 s16 route_start_y_min = route_y_min;
381 s16 route_start_y_max = route_y_max;
383 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
384 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
386 // Randomize starting position
388 (float)(ps->next() % ar.X) + 0.5,
389 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
390 (float)(ps->next() % ar.Z) + 0.5
393 // Add generation notify begin event
394 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
395 GenNotifyType notifytype = large_cave ?
396 GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN;
397 mg->gennotify.addEvent(notifytype, abs_pos);
399 // Generate some tunnel starting from orp
400 for (u16 j = 0; j < tunnel_routepoints; j++)
401 makeTunnel(j % dswitchint == 0);
403 // Add generation notify end event
404 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
405 notifytype = large_cave ?
406 GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END;
407 mg->gennotify.addEvent(notifytype, abs_pos);
411 void CaveV7::makeTunnel(bool dirswitch) {
412 if (dirswitch && !large_cave) {
413 main_direction = v3f(
414 ((float)(ps->next() % 20) - (float)10) / 10,
415 ((float)(ps->next() % 20) - (float)10) / 30,
416 ((float)(ps->next() % 20) - (float)10) / 10
418 main_direction *= (float)ps->range(0, 10) / 10;
422 s16 min_d = min_tunnel_diameter;
423 s16 max_d = max_tunnel_diameter;
424 rs = ps->range(min_d, max_d);
429 rs * part_max_length_rs,
430 rs * part_max_length_rs / 2,
431 rs * part_max_length_rs
435 rs * part_max_length_rs,
436 ps->range(1, rs * part_max_length_rs),
437 rs * part_max_length_rs
442 // Jump downward sometimes
443 if (!large_cave && ps->range(0, 12) == 0) {
445 (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
446 (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
447 (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
451 (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
452 (float)(ps->next() % (maxlen.Y * 1)) - (float)maxlen.Y / 2,
453 (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
457 // Do not make large caves that are above ground.
458 // It is only necessary to check the startpoint and endpoint.
460 v3s16 orpi(orp.X, orp.Y, orp.Z);
461 v3s16 veci(vec.X, vec.Y, vec.Z);
464 p = orpi + veci + of + rs / 2;
465 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
466 p.X >= node_min.X && p.X <= node_max.X) {
467 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
468 s16 h = mg->ridge_heightmap[index];
471 } else if (p.Y > water_level) {
472 return; // If it's not in our heightmap, use a simple heuristic
475 p = orpi + of + rs / 2;
476 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
477 p.X >= node_min.X && p.X <= node_max.X) {
478 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
479 s16 h = mg->ridge_heightmap[index];
482 } else if (p.Y > water_level) {
487 vec += main_direction;
492 else if (rp.X >= ar.X)
495 if (rp.Y < route_y_min)
497 else if (rp.Y >= route_y_max)
498 rp.Y = route_y_max - 1;
502 else if (rp.Z >= ar.Z)
507 float veclen = vec.getLength();
511 // Every second section is rough
512 bool randomize_xz = (ps->range(1, 2) == 1);
514 // Make a ravine every once in a while if it's long enough
515 //float xylen = vec.X * vec.X + vec.Z * vec.Z;
516 //disable ravines for now
517 bool is_ravine = false; //(xylen > 500.0) && !large_cave && (ps->range(1, 8) == 1);
520 for (float f = 0; f < 1.0; f += 1.0 / veclen)
521 carveRoute(vec, f, randomize_xz, is_ravine);
527 void CaveV7::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) {
528 MapNode airnode(CONTENT_AIR);
529 MapNode waternode(c_water_source);
530 MapNode lavanode(c_lava_source);
532 v3s16 startp(orp.X, orp.Y, orp.Z);
535 float nval = NoisePerlin3D(np_caveliquids, startp.X,
536 startp.Y, startp.Z, mg->seed);
537 MapNode liquidnode = nval < 0.40 ? lavanode : waternode;
539 v3f fp = orp + vec * f;
540 fp.X += 0.1 * ps->range(-10, 10);
541 fp.Z += 0.1 * ps->range(-10, 10);
542 v3s16 cp(fp.X, fp.Y, fp.Z);
547 d0 += ps->range(-1, 1);
548 d1 += ps->range(-1, 1);
551 bool flat_cave_floor = !large_cave && ps->range(0, 2) == 2;
552 bool should_make_cave_hole = ps->range(1, 10) == 1;
554 for (s16 z0 = d0; z0 <= d1; z0++) {
555 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
556 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
557 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
559 s16 si2 = is_ravine ? MYMIN(ps->range(25, 26), ar.Y) :
560 rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
562 for (s16 y0 = -si2; y0 <= si2; y0++) {
563 // Make better floors in small caves
564 if(flat_cave_floor && y0 <= -rs/2 && rs<=7)
567 if (large_cave_is_flat) {
568 // Make large caves not so tall
569 if (rs > 7 && abs(y0) >= rs / 3)
573 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
576 if (!is_ravine && mg->heightmap && should_make_cave_hole &&
577 p.X <= node_max.X && p.Z <= node_max.Z) {
578 int maplen = node_max.X - node_min.X + 1;
579 int idx = (p.Z - node_min.Z) * maplen + (p.X - node_min.X);
580 if (p.Y >= mg->heightmap[idx] - 2)
584 if (vm->m_area.contains(p) == false)
587 u32 i = vm->m_area.index(p);
589 // Don't replace air, water, lava, or ice
590 content_t c = vm->m_data[i].getContent();
591 if (!ndef->get(c).is_ground_content || c == CONTENT_AIR ||
592 c == c_water_source || c == c_lava_source || c == c_ice)
596 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
597 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
599 if (flooded && full_ymin < water_level && full_ymax > water_level)
600 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
601 else if (flooded && full_ymax < water_level)
602 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
604 vm->m_data[i] = airnode;
606 if (c == CONTENT_IGNORE)
609 vm->m_data[i] = airnode;
610 vm->m_flags[i] |= VMANIP_FLAG_CAVE;
618 ///////////////////////////////////////// Caves V5
621 CaveV5::CaveV5(MapgenV5 *mg, PseudoRandom *ps) {
624 this->ndef = mg->ndef;
625 this->water_level = mg->water_level;
627 this->c_water_source = mg->c_water_source;
628 this->c_lava_source = mg->c_lava_source;
629 this->c_ice = mg->c_ice;
630 this->np_caveliquids = &nparams_caveliquids;
632 dswitchint = ps->range(1, 14);
633 flooded = ps->range(1, 2) == 2;
635 part_max_length_rs = ps->range(2, 4);
636 tunnel_routepoints = ps->range(5, ps->range(15, 30));
637 min_tunnel_diameter = 5;
638 max_tunnel_diameter = ps->range(7, ps->range(8, 24));
640 large_cave_is_flat = (ps->range(0, 1) == 0);
644 void CaveV5::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) {
647 main_direction = v3f(0, 0, 0);
649 // Allowed route area size in nodes
650 ar = node_max - node_min + v3s16(1, 1, 1);
651 // Area starting point in nodes
655 //(this should be more than the maximum radius of the tunnel)
657 s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
658 ar += v3s16(1,0,1) * more * 2;
659 of -= v3s16(1,0,1) * more;
662 // Allow half a diameter + 7 over stone surface
663 route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7;
665 // Limit maximum to area
666 route_y_max = rangelim(route_y_max, 0, ar.Y - 1);
669 if (node_min.Y < water_level && node_max.Y > water_level) {
670 min = water_level - max_tunnel_diameter/3 - of.Y;
671 route_y_max = water_level + max_tunnel_diameter/3 - of.Y;
673 route_y_min = ps->range(min, min + max_tunnel_diameter);
674 route_y_min = rangelim(route_y_min, 0, route_y_max);
676 s16 route_start_y_min = route_y_min;
677 s16 route_start_y_max = route_y_max;
679 route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1);
680 route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
682 // Randomize starting position
684 (float)(ps->next() % ar.X) + 0.5,
685 (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
686 (float)(ps->next() % ar.Z) + 0.5
689 // Add generation notify begin event
690 v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
691 GenNotifyType notifytype = GENNOTIFY_LARGECAVE_BEGIN;
692 mg->gennotify.addEvent(notifytype, abs_pos);
694 // Generate some tunnel starting from orp
695 for (u16 j = 0; j < tunnel_routepoints; j++)
696 makeTunnel(j % dswitchint == 0);
698 // Add generation notify end event
699 abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z);
700 notifytype = GENNOTIFY_LARGECAVE_END;
701 mg->gennotify.addEvent(notifytype, abs_pos);
705 void CaveV5::makeTunnel(bool dirswitch) {
708 s16 min_d = min_tunnel_diameter;
709 s16 max_d = max_tunnel_diameter;
710 rs = ps->range(min_d, max_d);
714 rs * part_max_length_rs,
715 rs * part_max_length_rs / 2,
716 rs * part_max_length_rs
720 // Jump downward sometimes
722 (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
723 (float)(ps->next() % (maxlen.Y * 1)) - (float)maxlen.Y / 2,
724 (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
727 // Do not make large caves that are above ground.
728 // It is only necessary to check the startpoint and endpoint.
729 v3s16 orpi(orp.X, orp.Y, orp.Z);
730 v3s16 veci(vec.X, vec.Y, vec.Z);
733 p = orpi + veci + of + rs / 2;
734 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
735 p.X >= node_min.X && p.X <= node_max.X) {
736 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
737 s16 h = mg->heightmap[index];
740 } else if (p.Y > water_level) {
741 return; // If it's not in our heightmap, use a simple heuristic
744 p = orpi + of + rs / 2;
745 if (p.Z >= node_min.Z && p.Z <= node_max.Z &&
746 p.X >= node_min.X && p.X <= node_max.X) {
747 u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X);
748 s16 h = mg->heightmap[index];
751 } else if (p.Y > water_level) {
755 vec += main_direction;
760 else if (rp.X >= ar.X)
763 if (rp.Y < route_y_min)
765 else if (rp.Y >= route_y_max)
766 rp.Y = route_y_max - 1;
770 else if (rp.Z >= ar.Z)
775 float veclen = vec.getLength();
779 // Every second section is rough
780 bool randomize_xz = (ps->range(1, 2) == 1);
782 // Make a ravine every once in a while if it's long enough
783 //float xylen = vec.X * vec.X + vec.Z * vec.Z;
784 //disable ravines for now
785 bool is_ravine = false; //(xylen > 500.0) && !large_cave && (ps->range(1, 8) == 1);
788 for (float f = 0; f < 1.0; f += 1.0 / veclen)
789 carveRoute(vec, f, randomize_xz, is_ravine);
795 void CaveV5::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) {
796 MapNode airnode(CONTENT_AIR);
797 MapNode waternode(c_water_source);
798 MapNode lavanode(c_lava_source);
800 v3s16 startp(orp.X, orp.Y, orp.Z);
803 float nval = NoisePerlin3D(np_caveliquids, startp.X,
804 startp.Y, startp.Z, mg->seed);
805 MapNode liquidnode = nval < 0.40 ? lavanode : waternode;
807 v3f fp = orp + vec * f;
808 fp.X += 0.1 * ps->range(-10, 10);
809 fp.Z += 0.1 * ps->range(-10, 10);
810 v3s16 cp(fp.X, fp.Y, fp.Z);
815 d0 += ps->range(-1, 1);
816 d1 += ps->range(-1, 1);
819 bool should_make_cave_hole = ps->range(1, 10) == 1;
821 for (s16 z0 = d0; z0 <= d1; z0++) {
822 s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
823 for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
824 s16 maxabsxz = MYMAX(abs(x0), abs(z0));
826 s16 si2 = is_ravine ? MYMIN(ps->range(25, 26), ar.Y) :
827 rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
829 for (s16 y0 = -si2; y0 <= si2; y0++) {
830 if (large_cave_is_flat) {
831 // Make large caves not so tall
832 if (rs > 7 && abs(y0) >= rs / 3)
836 v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
839 if (!is_ravine && mg->heightmap && should_make_cave_hole &&
840 p.X <= node_max.X && p.Z <= node_max.Z) {
841 int maplen = node_max.X - node_min.X + 1;
842 int idx = (p.Z - node_min.Z) * maplen + (p.X - node_min.X);
843 if (p.Y >= mg->heightmap[idx] - 2)
847 if (vm->m_area.contains(p) == false)
850 u32 i = vm->m_area.index(p);
852 // Don't replace air, water, lava, or ice
853 content_t c = vm->m_data[i].getContent();
854 if (!ndef->get(c).is_ground_content || c == CONTENT_AIR ||
855 c == c_water_source || c == c_lava_source || c == c_ice)
858 int full_ymin = node_min.Y - MAP_BLOCKSIZE;
859 int full_ymax = node_max.Y + MAP_BLOCKSIZE;
861 if (flooded && full_ymin < water_level && full_ymax > water_level)
862 vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
863 else if (flooded && full_ymax < water_level)
864 vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
866 vm->m_data[i] = airnode;