3 Copyright (C) 2013-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
4 Copyright (C) 2014-2018 paramat
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
29 #include "content_sao.h"
31 #include "voxelalgorithms.h"
32 #include "settings.h" // For g_settings
34 #include "dungeongen.h"
38 #include "mg_decoration.h"
39 #include "mapgen_v7.h"
42 FlagDesc flagdesc_mapgen_v7[] = {
43 {"mountains", MGV7_MOUNTAINS},
44 {"ridges", MGV7_RIDGES},
45 {"floatlands", MGV7_FLOATLANDS},
46 {"caverns", MGV7_CAVERNS},
51 ///////////////////////////////////////////////////////////////////////////////
54 MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge)
55 : MapgenBasic(mapgenid, params, emerge)
57 spflags = params->spflags;
58 mount_zero_level = params->mount_zero_level;
59 cave_width = params->cave_width;
60 large_cave_depth = params->large_cave_depth;
61 lava_depth = params->lava_depth;
62 float_mount_density = params->float_mount_density;
63 float_mount_exponent = params->float_mount_exponent;
64 floatland_level = params->floatland_level;
65 shadow_limit = params->shadow_limit;
66 cavern_limit = params->cavern_limit;
67 cavern_taper = params->cavern_taper;
68 cavern_threshold = params->cavern_threshold;
69 dungeon_ymin = params->dungeon_ymin;
70 dungeon_ymax = params->dungeon_ymax;
72 // This is to avoid a divide-by-zero.
73 // Parameter will be saved to map_meta.txt in limited form.
74 params->float_mount_height = MYMAX(params->float_mount_height, 1.0f);
75 float_mount_height = params->float_mount_height;
78 noise_terrain_base = new Noise(¶ms->np_terrain_base, seed, csize.X, csize.Z);
79 noise_terrain_alt = new Noise(¶ms->np_terrain_alt, seed, csize.X, csize.Z);
80 noise_terrain_persist = new Noise(¶ms->np_terrain_persist, seed, csize.X, csize.Z);
81 noise_height_select = new Noise(¶ms->np_height_select, seed, csize.X, csize.Z);
82 noise_filler_depth = new Noise(¶ms->np_filler_depth, seed, csize.X, csize.Z);
84 if (spflags & MGV7_MOUNTAINS)
85 noise_mount_height = new Noise(¶ms->np_mount_height, seed, csize.X, csize.Z);
87 if (spflags & MGV7_FLOATLANDS) {
88 noise_floatland_base = new Noise(¶ms->np_floatland_base, seed, csize.X, csize.Z);
89 noise_float_base_height = new Noise(¶ms->np_float_base_height, seed, csize.X, csize.Z);
92 if (spflags & MGV7_RIDGES) {
93 noise_ridge_uwater = new Noise(¶ms->np_ridge_uwater, seed, csize.X, csize.Z);
94 // 3D noise, 1-up 1-down overgeneration
95 noise_ridge = new Noise(¶ms->np_ridge, seed, csize.X, csize.Y + 2, csize.Z);
97 // 3D noise, 1 up, 1 down overgeneration
98 if ((spflags & MGV7_MOUNTAINS) || (spflags & MGV7_FLOATLANDS))
99 noise_mountain = new Noise(¶ms->np_mountain, seed, csize.X, csize.Y + 2, csize.Z);
100 // 3D noise, 1 down overgeneration
101 MapgenBasic::np_cave1 = params->np_cave1;
102 MapgenBasic::np_cave2 = params->np_cave2;
103 MapgenBasic::np_cavern = params->np_cavern;
107 MapgenV7::~MapgenV7()
109 delete noise_terrain_base;
110 delete noise_terrain_alt;
111 delete noise_terrain_persist;
112 delete noise_height_select;
113 delete noise_filler_depth;
115 if (spflags & MGV7_MOUNTAINS)
116 delete noise_mount_height;
118 if (spflags & MGV7_FLOATLANDS) {
119 delete noise_floatland_base;
120 delete noise_float_base_height;
123 if (spflags & MGV7_RIDGES) {
124 delete noise_ridge_uwater;
128 if ((spflags & MGV7_MOUNTAINS) || (spflags & MGV7_FLOATLANDS))
129 delete noise_mountain;
133 MapgenV7Params::MapgenV7Params():
134 np_terrain_base (4, 70, v3f(600, 600, 600), 82341, 5, 0.6, 2.0),
135 np_terrain_alt (4, 25, v3f(600, 600, 600), 5934, 5, 0.6, 2.0),
136 np_terrain_persist (0.6, 0.1, v3f(2000, 2000, 2000), 539, 3, 0.6, 2.0),
137 np_height_select (-8, 16, v3f(500, 500, 500), 4213, 6, 0.7, 2.0),
138 np_filler_depth (0, 1.2, v3f(150, 150, 150), 261, 3, 0.7, 2.0),
139 np_mount_height (256, 112, v3f(1000, 1000, 1000), 72449, 3, 0.6, 2.0),
140 np_ridge_uwater (0, 1, v3f(1000, 1000, 1000), 85039, 5, 0.6, 2.0),
141 np_floatland_base (-0.6, 1.5, v3f(600, 600, 600), 114, 5, 0.6, 2.0),
142 np_float_base_height (48, 24, v3f(300, 300, 300), 907, 4, 0.7, 2.0),
143 np_mountain (-0.6, 1, v3f(250, 350, 250), 5333, 5, 0.63, 2.0),
144 np_ridge (0, 1, v3f(100, 100, 100), 6467, 4, 0.75, 2.0),
145 np_cavern (0, 1, v3f(384, 128, 384), 723, 5, 0.63, 2.0),
146 np_cave1 (0, 12, v3f(61, 61, 61), 52534, 3, 0.5, 2.0),
147 np_cave2 (0, 12, v3f(67, 67, 67), 10325, 3, 0.5, 2.0)
152 void MapgenV7Params::readParams(const Settings *settings)
154 settings->getFlagStrNoEx("mgv7_spflags", spflags, flagdesc_mapgen_v7);
155 settings->getS16NoEx("mgv7_mount_zero_level", mount_zero_level);
156 settings->getFloatNoEx("mgv7_cave_width", cave_width);
157 settings->getS16NoEx("mgv7_large_cave_depth", large_cave_depth);
158 settings->getS16NoEx("mgv7_lava_depth", lava_depth);
159 settings->getFloatNoEx("mgv7_float_mount_density", float_mount_density);
160 settings->getFloatNoEx("mgv7_float_mount_height", float_mount_height);
161 settings->getFloatNoEx("mgv7_float_mount_exponent", float_mount_exponent);
162 settings->getS16NoEx("mgv7_floatland_level", floatland_level);
163 settings->getS16NoEx("mgv7_shadow_limit", shadow_limit);
164 settings->getS16NoEx("mgv7_cavern_limit", cavern_limit);
165 settings->getS16NoEx("mgv7_cavern_taper", cavern_taper);
166 settings->getFloatNoEx("mgv7_cavern_threshold", cavern_threshold);
167 settings->getS16NoEx("mgv7_dungeon_ymin", dungeon_ymin);
168 settings->getS16NoEx("mgv7_dungeon_ymax", dungeon_ymax);
170 settings->getNoiseParams("mgv7_np_terrain_base", np_terrain_base);
171 settings->getNoiseParams("mgv7_np_terrain_alt", np_terrain_alt);
172 settings->getNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
173 settings->getNoiseParams("mgv7_np_height_select", np_height_select);
174 settings->getNoiseParams("mgv7_np_filler_depth", np_filler_depth);
175 settings->getNoiseParams("mgv7_np_mount_height", np_mount_height);
176 settings->getNoiseParams("mgv7_np_ridge_uwater", np_ridge_uwater);
177 settings->getNoiseParams("mgv7_np_floatland_base", np_floatland_base);
178 settings->getNoiseParams("mgv7_np_float_base_height", np_float_base_height);
179 settings->getNoiseParams("mgv7_np_mountain", np_mountain);
180 settings->getNoiseParams("mgv7_np_ridge", np_ridge);
181 settings->getNoiseParams("mgv7_np_cavern", np_cavern);
182 settings->getNoiseParams("mgv7_np_cave1", np_cave1);
183 settings->getNoiseParams("mgv7_np_cave2", np_cave2);
187 void MapgenV7Params::writeParams(Settings *settings) const
189 settings->setFlagStr("mgv7_spflags", spflags, flagdesc_mapgen_v7, U32_MAX);
190 settings->setS16("mgv7_mount_zero_level", mount_zero_level);
191 settings->setFloat("mgv7_cave_width", cave_width);
192 settings->setS16("mgv7_large_cave_depth", large_cave_depth);
193 settings->setS16("mgv7_lava_depth", lava_depth);
194 settings->setFloat("mgv7_float_mount_density", float_mount_density);
195 settings->setFloat("mgv7_float_mount_height", float_mount_height);
196 settings->setFloat("mgv7_float_mount_exponent", float_mount_exponent);
197 settings->setS16("mgv7_floatland_level", floatland_level);
198 settings->setS16("mgv7_shadow_limit", shadow_limit);
199 settings->setS16("mgv7_cavern_limit", cavern_limit);
200 settings->setS16("mgv7_cavern_taper", cavern_taper);
201 settings->setFloat("mgv7_cavern_threshold", cavern_threshold);
202 settings->setS16("mgv7_dungeon_ymin", dungeon_ymin);
203 settings->setS16("mgv7_dungeon_ymax", dungeon_ymax);
205 settings->setNoiseParams("mgv7_np_terrain_base", np_terrain_base);
206 settings->setNoiseParams("mgv7_np_terrain_alt", np_terrain_alt);
207 settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
208 settings->setNoiseParams("mgv7_np_height_select", np_height_select);
209 settings->setNoiseParams("mgv7_np_filler_depth", np_filler_depth);
210 settings->setNoiseParams("mgv7_np_mount_height", np_mount_height);
211 settings->setNoiseParams("mgv7_np_ridge_uwater", np_ridge_uwater);
212 settings->setNoiseParams("mgv7_np_floatland_base", np_floatland_base);
213 settings->setNoiseParams("mgv7_np_float_base_height", np_float_base_height);
214 settings->setNoiseParams("mgv7_np_mountain", np_mountain);
215 settings->setNoiseParams("mgv7_np_ridge", np_ridge);
216 settings->setNoiseParams("mgv7_np_cavern", np_cavern);
217 settings->setNoiseParams("mgv7_np_cave1", np_cave1);
218 settings->setNoiseParams("mgv7_np_cave2", np_cave2);
222 ///////////////////////////////////////////////////////////////////////////////
225 int MapgenV7::getSpawnLevelAtPoint(v2s16 p)
227 // If rivers are enabled, first check if in a river
228 if (spflags & MGV7_RIDGES) {
230 float uwatern = NoisePerlin2D(&noise_ridge_uwater->np, p.X, p.Y, seed) * 2;
231 if (std::fabs(uwatern) <= width)
232 return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
235 // Terrain noise 'offset' is the average level of that terrain.
236 // At least 50% of terrain will be below the higher of base and alt terrain
238 // Raising the maximum spawn level above 'water_level + 16' is necessary
239 // for when terrain 'offset's are set much higher than water_level.
240 s16 max_spawn_y = MYMAX(MYMAX(noise_terrain_alt->np.offset,
241 noise_terrain_base->np.offset),
243 // Base terrain calculation
244 s16 y = baseTerrainLevelAtPoint(p.X, p.Y);
246 // If mountains are disabled, terrain level is base terrain level.
247 // Avoids mid-air spawn where mountain terrain would have been.
248 if (!(spflags & MGV7_MOUNTAINS)) {
249 if (y < water_level || y > max_spawn_y)
250 return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
252 // y + 2 because y is surface level and due to biome 'dust'
256 // Search upwards for first node without mountain terrain
258 while (iters > 0 && y <= max_spawn_y) {
259 if (!getMountainTerrainAtPoint(p.X, y + 1, p.Y)) {
260 if (y <= water_level || y > max_spawn_y)
261 return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
263 // y + 1 due to biome 'dust'
270 // Unsuitable spawn point
271 return MAX_MAP_GENERATION_LIMIT;
275 void MapgenV7::makeChunk(BlockMakeData *data)
278 assert(data->vmanip);
279 assert(data->nodedef);
280 assert(data->blockpos_requested.X >= data->blockpos_min.X &&
281 data->blockpos_requested.Y >= data->blockpos_min.Y &&
282 data->blockpos_requested.Z >= data->blockpos_min.Z);
283 assert(data->blockpos_requested.X <= data->blockpos_max.X &&
284 data->blockpos_requested.Y <= data->blockpos_max.Y &&
285 data->blockpos_requested.Z <= data->blockpos_max.Z);
287 this->generating = true;
288 this->vm = data->vmanip;
289 this->ndef = data->nodedef;
290 //TimeTaker t("makeChunk");
292 v3s16 blockpos_min = data->blockpos_min;
293 v3s16 blockpos_max = data->blockpos_max;
294 node_min = blockpos_min * MAP_BLOCKSIZE;
295 node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
296 full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
297 full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
299 blockseed = getBlockSeed2(full_node_min, seed);
301 // Generate base and mountain terrain
302 // An initial heightmap is no longer created here for use in generateRidgeTerrain()
303 s16 stone_surface_max_y = generateTerrain();
306 if (spflags & MGV7_RIDGES)
307 generateRidgeTerrain();
310 updateHeightmap(node_min, node_max);
312 // Init biome generator, place biome-specific nodes, and build biomemap
313 biomegen->calcBiomeNoise(node_min);
316 // Generate caverns, tunnels and classic caves
317 if (flags & MG_CAVES) {
318 bool near_cavern = false;
320 if (spflags & MGV7_CAVERNS)
321 near_cavern = generateCaverns(stone_surface_max_y);
322 // Generate tunnels and classic caves
324 // Disable classic caves in this mapchunk by setting
325 // 'large cave depth' to world base. Avoids excessive liquid in
326 // large caverns and floating blobs of overgenerated liquid.
327 generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
329 generateCaves(stone_surface_max_y, large_cave_depth);
333 if ((flags & MG_DUNGEONS) && full_node_min.Y >= dungeon_ymin &&
334 full_node_max.Y <= dungeon_ymax)
335 generateDungeons(stone_surface_max_y);
337 // Generate the registered decorations
338 if (flags & MG_DECORATIONS)
339 m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
341 // Generate the registered ores
342 m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
344 // Sprinkle some dust on top after everything else was generated
347 //printf("makeChunk: %dms\n", t.stop());
350 updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
352 // Calculate lighting
353 // Limit floatland shadow
354 bool propagate_shadow = !((spflags & MGV7_FLOATLANDS) &&
355 node_min.Y <= shadow_limit && node_max.Y >= shadow_limit);
357 if (flags & MG_LIGHT)
358 calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
359 full_node_min, full_node_max, propagate_shadow);
361 //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
362 // node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
364 this->generating = false;
368 float MapgenV7::baseTerrainLevelAtPoint(s16 x, s16 z)
370 float hselect = NoisePerlin2D(&noise_height_select->np, x, z, seed);
371 hselect = rangelim(hselect, 0.0, 1.0);
373 float persist = NoisePerlin2D(&noise_terrain_persist->np, x, z, seed);
375 noise_terrain_base->np.persist = persist;
376 float height_base = NoisePerlin2D(&noise_terrain_base->np, x, z, seed);
378 noise_terrain_alt->np.persist = persist;
379 float height_alt = NoisePerlin2D(&noise_terrain_alt->np, x, z, seed);
381 if (height_alt > height_base)
384 return (height_base * hselect) + (height_alt * (1.0 - hselect));
388 float MapgenV7::baseTerrainLevelFromMap(int index)
390 float hselect = rangelim(noise_height_select->result[index], 0.0, 1.0);
391 float height_base = noise_terrain_base->result[index];
392 float height_alt = noise_terrain_alt->result[index];
394 if (height_alt > height_base)
397 return (height_base * hselect) + (height_alt * (1.0 - hselect));
401 bool MapgenV7::getMountainTerrainAtPoint(s16 x, s16 y, s16 z)
404 MYMAX(NoisePerlin2D(&noise_mount_height->np, x, z, seed), 1.0f);
405 float density_gradient = -((float)(y - mount_zero_level) / mnt_h_n);
406 float mnt_n = NoisePerlin3D(&noise_mountain->np, x, y, z, seed);
408 return mnt_n + density_gradient >= 0.0;
412 bool MapgenV7::getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y)
414 float mounthn = MYMAX(noise_mount_height->result[idx_xz], 1.0f);
415 float density_gradient = -((float)(y - mount_zero_level) / mounthn);
416 float mountn = noise_mountain->result[idx_xyz];
418 return mountn + density_gradient >= 0.0;
422 bool MapgenV7::getFloatlandMountainFromMap(int idx_xyz, int idx_xz, s16 y)
424 // Make rim 2 nodes thick to match floatland base terrain
425 float density_gradient = (y >= floatland_level) ?
426 -std::pow((float)(y - floatland_level) / float_mount_height,
427 float_mount_exponent) :
428 -std::pow((float)(floatland_level - 1 - y) / float_mount_height,
429 float_mount_exponent);
431 float floatn = noise_mountain->result[idx_xyz] + float_mount_density;
433 return floatn + density_gradient >= 0.0f;
437 void MapgenV7::floatBaseExtentFromMap(s16 *float_base_min, s16 *float_base_max, int idx_xz)
439 // '+1' to avoid a layer of stone at y = MAX_MAP_GENERATION_LIMIT
440 s16 base_min = MAX_MAP_GENERATION_LIMIT + 1;
441 s16 base_max = MAX_MAP_GENERATION_LIMIT;
443 float n_base = noise_floatland_base->result[idx_xz];
445 float n_base_height =
446 MYMAX(noise_float_base_height->result[idx_xz], 1.0f);
447 float amp = n_base * n_base_height;
448 float ridge = n_base_height / 3.0f;
449 base_min = floatland_level - amp / 1.5f;
451 if (amp > ridge * 2.0f) {
453 base_max = floatland_level - (amp - ridge * 2.0f) / 2.0f;
456 float diff = std::fabs(amp - ridge) / ridge;
457 // Smooth ridges using the 'smoothstep function'
458 float smooth_diff = diff * diff * (3.0f - 2.0f * diff);
459 base_max = floatland_level + ridge - smooth_diff * ridge;
463 *float_base_min = base_min;
464 *float_base_max = base_max;
468 int MapgenV7::generateTerrain()
470 MapNode n_air(CONTENT_AIR);
471 MapNode n_stone(c_stone);
472 MapNode n_water(c_water_source);
474 //// Calculate noise for terrain generation
475 noise_terrain_persist->perlinMap2D(node_min.X, node_min.Z);
476 float *persistmap = noise_terrain_persist->result;
478 noise_terrain_base->perlinMap2D(node_min.X, node_min.Z, persistmap);
479 noise_terrain_alt->perlinMap2D(node_min.X, node_min.Z, persistmap);
480 noise_height_select->perlinMap2D(node_min.X, node_min.Z);
482 if ((spflags & MGV7_MOUNTAINS) || (spflags & MGV7_FLOATLANDS)) {
483 noise_mountain->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
486 if (spflags & MGV7_MOUNTAINS) {
487 noise_mount_height->perlinMap2D(node_min.X, node_min.Z);
490 if (spflags & MGV7_FLOATLANDS) {
491 noise_floatland_base->perlinMap2D(node_min.X, node_min.Z);
492 noise_float_base_height->perlinMap2D(node_min.X, node_min.Z);
496 const v3s16 &em = vm->m_area.getExtent();
497 s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
500 for (s16 z = node_min.Z; z <= node_max.Z; z++)
501 for (s16 x = node_min.X; x <= node_max.X; x++, index2d++) {
502 s16 surface_y = baseTerrainLevelFromMap(index2d);
503 if (surface_y > stone_surface_max_y)
504 stone_surface_max_y = surface_y;
506 // Get extent of floatland base terrain
507 // '+1' to avoid a layer of stone at y = MAX_MAP_GENERATION_LIMIT
508 s16 float_base_min = MAX_MAP_GENERATION_LIMIT + 1;
509 s16 float_base_max = MAX_MAP_GENERATION_LIMIT;
510 if (spflags & MGV7_FLOATLANDS)
511 floatBaseExtentFromMap(&float_base_min, &float_base_max, index2d);
513 u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
514 u32 index3d = (z - node_min.Z) * zstride_1u1d + (x - node_min.X);
516 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
517 if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
518 if (y <= surface_y) {
519 vm->m_data[vi] = n_stone; // Base terrain
520 } else if ((spflags & MGV7_MOUNTAINS) &&
521 getMountainTerrainFromMap(index3d, index2d, y)) {
522 vm->m_data[vi] = n_stone; // Mountain terrain
523 if (y > stone_surface_max_y)
524 stone_surface_max_y = y;
525 } else if ((spflags & MGV7_FLOATLANDS) &&
526 ((y >= float_base_min && y <= float_base_max) ||
527 getFloatlandMountainFromMap(index3d, index2d, y))) {
528 vm->m_data[vi] = n_stone; // Floatland terrain
529 stone_surface_max_y = node_max.Y;
530 } else if (y <= water_level) {
531 vm->m_data[vi] = n_water; // Ground level water
532 } else if ((spflags & MGV7_FLOATLANDS) &&
533 (y >= float_base_max && y <= floatland_level)) {
534 vm->m_data[vi] = n_water; // Floatland water
536 vm->m_data[vi] = n_air;
539 VoxelArea::add_y(em, vi, 1);
544 return stone_surface_max_y;
548 void MapgenV7::generateRidgeTerrain()
550 if (node_max.Y < water_level - 16 ||
551 ((spflags & MGV7_FLOATLANDS) && node_max.Y > shadow_limit))
554 noise_ridge->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
555 noise_ridge_uwater->perlinMap2D(node_min.X, node_min.Z);
557 MapNode n_water(c_water_source);
558 MapNode n_air(CONTENT_AIR);
562 for (s16 z = node_min.Z; z <= node_max.Z; z++)
563 for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
564 u32 vi = vm->m_area.index(node_min.X, y, z);
565 for (s16 x = node_min.X; x <= node_max.X; x++, index++, vi++) {
566 int j = (z - node_min.Z) * csize.X + (x - node_min.X);
568 float uwatern = noise_ridge_uwater->result[j] * 2;
569 if (std::fabs(uwatern) > width)
572 float altitude = y - water_level;
573 float height_mod = (altitude + 17) / 2.5;
574 float width_mod = width - std::fabs(uwatern);
575 float nridge = noise_ridge->result[index] * MYMAX(altitude, 0) / 7.0;
577 if (nridge + width_mod * height_mod < 0.6)
580 vm->m_data[vi] = (y > water_level) ? n_air : n_water;