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- /*
- Minetest
- Copyright (C) 2014-2020 paramat
- Copyright (C) 2013-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #include "mapgen.h"
- #include <cmath>
- #include "voxel.h"
- #include "noise.h"
- #include "mapblock.h"
- #include "mapnode.h"
- #include "map.h"
- #include "nodedef.h"
- #include "voxelalgorithms.h"
- //#include "profiler.h" // For TimeTaker
- #include "settings.h" // For g_settings
- #include "emerge.h"
- #include "dungeongen.h"
- #include "cavegen.h"
- #include "mg_biome.h"
- #include "mg_ore.h"
- #include "mg_decoration.h"
- #include "mapgen_v7.h"
- FlagDesc flagdesc_mapgen_v7[] = {
- {"mountains", MGV7_MOUNTAINS},
- {"ridges", MGV7_RIDGES},
- {"floatlands", MGV7_FLOATLANDS},
- {"caverns", MGV7_CAVERNS},
- {NULL, 0}
- };
- ////////////////////////////////////////////////////////////////////////////////
- MapgenV7::MapgenV7(MapgenV7Params *params, EmergeParams *emerge)
- : MapgenBasic(MAPGEN_V7, params, emerge)
- {
- spflags = params->spflags;
- mount_zero_level = params->mount_zero_level;
- floatland_ymin = params->floatland_ymin;
- floatland_ymax = params->floatland_ymax;
- floatland_taper = params->floatland_taper;
- float_taper_exp = params->float_taper_exp;
- floatland_density = params->floatland_density;
- floatland_ywater = params->floatland_ywater;
- cave_width = params->cave_width;
- large_cave_depth = params->large_cave_depth;
- small_cave_num_min = params->small_cave_num_min;
- small_cave_num_max = params->small_cave_num_max;
- large_cave_num_min = params->large_cave_num_min;
- large_cave_num_max = params->large_cave_num_max;
- large_cave_flooded = params->large_cave_flooded;
- cavern_limit = params->cavern_limit;
- cavern_taper = params->cavern_taper;
- cavern_threshold = params->cavern_threshold;
- dungeon_ymin = params->dungeon_ymin;
- dungeon_ymax = params->dungeon_ymax;
- // Allocate floatland noise offset cache
- this->float_offset_cache = new float[csize.Y + 2];
- // 2D noise
- noise_terrain_base =
- new Noise(¶ms->np_terrain_base, seed, csize.X, csize.Z);
- noise_terrain_alt =
- new Noise(¶ms->np_terrain_alt, seed, csize.X, csize.Z);
- noise_terrain_persist =
- new Noise(¶ms->np_terrain_persist, seed, csize.X, csize.Z);
- noise_height_select =
- new Noise(¶ms->np_height_select, seed, csize.X, csize.Z);
- noise_filler_depth =
- new Noise(¶ms->np_filler_depth, seed, csize.X, csize.Z);
- if (spflags & MGV7_MOUNTAINS) {
- // 2D noise
- noise_mount_height =
- new Noise(¶ms->np_mount_height, seed, csize.X, csize.Z);
- // 3D noise, 1 up, 1 down overgeneration
- noise_mountain =
- new Noise(¶ms->np_mountain, seed, csize.X, csize.Y + 2, csize.Z);
- }
- if (spflags & MGV7_RIDGES) {
- // 2D noise
- noise_ridge_uwater =
- new Noise(¶ms->np_ridge_uwater, seed, csize.X, csize.Z);
- // 3D noise, 1 up, 1 down overgeneration
- noise_ridge =
- new Noise(¶ms->np_ridge, seed, csize.X, csize.Y + 2, csize.Z);
- }
- if (spflags & MGV7_FLOATLANDS) {
- // 3D noise, 1 up, 1 down overgeneration
- noise_floatland =
- new Noise(¶ms->np_floatland, seed, csize.X, csize.Y + 2, csize.Z);
- }
- // 3D noise, 1 down overgeneration
- MapgenBasic::np_cave1 = params->np_cave1;
- MapgenBasic::np_cave2 = params->np_cave2;
- MapgenBasic::np_cavern = params->np_cavern;
- // 3D noise
- MapgenBasic::np_dungeons = params->np_dungeons;
- }
- MapgenV7::~MapgenV7()
- {
- delete noise_terrain_base;
- delete noise_terrain_alt;
- delete noise_terrain_persist;
- delete noise_height_select;
- delete noise_filler_depth;
- if (spflags & MGV7_MOUNTAINS) {
- delete noise_mount_height;
- delete noise_mountain;
- }
- if (spflags & MGV7_RIDGES) {
- delete noise_ridge_uwater;
- delete noise_ridge;
- }
- if (spflags & MGV7_FLOATLANDS) {
- delete noise_floatland;
- }
- delete []float_offset_cache;
- }
- MapgenV7Params::MapgenV7Params():
- np_terrain_base (4.0, 70.0, v3f(600, 600, 600), 82341, 5, 0.6, 2.0),
- np_terrain_alt (4.0, 25.0, v3f(600, 600, 600), 5934, 5, 0.6, 2.0),
- np_terrain_persist (0.6, 0.1, v3f(2000, 2000, 2000), 539, 3, 0.6, 2.0),
- np_height_select (-8.0, 16.0, v3f(500, 500, 500), 4213, 6, 0.7, 2.0),
- np_filler_depth (0.0, 1.2, v3f(150, 150, 150), 261, 3, 0.7, 2.0),
- np_mount_height (256.0, 112.0, v3f(1000, 1000, 1000), 72449, 3, 0.6, 2.0),
- np_ridge_uwater (0.0, 1.0, v3f(1000, 1000, 1000), 85039, 5, 0.6, 2.0),
- np_mountain (-0.6, 1.0, v3f(250, 350, 250), 5333, 5, 0.63, 2.0),
- np_ridge (0.0, 1.0, v3f(100, 100, 100), 6467, 4, 0.75, 2.0),
- np_floatland (0.0, 0.7, v3f(384, 96, 384), 1009, 4, 0.75, 1.618),
- np_cavern (0.0, 1.0, v3f(384, 128, 384), 723, 5, 0.63, 2.0),
- np_cave1 (0.0, 12.0, v3f(61, 61, 61), 52534, 3, 0.5, 2.0),
- np_cave2 (0.0, 12.0, v3f(67, 67, 67), 10325, 3, 0.5, 2.0),
- np_dungeons (0.9, 0.5, v3f(500, 500, 500), 0, 2, 0.8, 2.0)
- {
- }
- void MapgenV7Params::readParams(const Settings *settings)
- {
- settings->getFlagStrNoEx("mgv7_spflags", spflags, flagdesc_mapgen_v7);
- settings->getS16NoEx("mgv7_mount_zero_level", mount_zero_level);
- settings->getS16NoEx("mgv7_floatland_ymin", floatland_ymin);
- settings->getS16NoEx("mgv7_floatland_ymax", floatland_ymax);
- settings->getS16NoEx("mgv7_floatland_taper", floatland_taper);
- settings->getFloatNoEx("mgv7_float_taper_exp", float_taper_exp);
- settings->getFloatNoEx("mgv7_floatland_density", floatland_density);
- settings->getS16NoEx("mgv7_floatland_ywater", floatland_ywater);
- settings->getFloatNoEx("mgv7_cave_width", cave_width);
- settings->getS16NoEx("mgv7_large_cave_depth", large_cave_depth);
- settings->getU16NoEx("mgv7_small_cave_num_min", small_cave_num_min);
- settings->getU16NoEx("mgv7_small_cave_num_max", small_cave_num_max);
- settings->getU16NoEx("mgv7_large_cave_num_min", large_cave_num_min);
- settings->getU16NoEx("mgv7_large_cave_num_max", large_cave_num_max);
- settings->getFloatNoEx("mgv7_large_cave_flooded", large_cave_flooded);
- settings->getS16NoEx("mgv7_cavern_limit", cavern_limit);
- settings->getS16NoEx("mgv7_cavern_taper", cavern_taper);
- settings->getFloatNoEx("mgv7_cavern_threshold", cavern_threshold);
- settings->getS16NoEx("mgv7_dungeon_ymin", dungeon_ymin);
- settings->getS16NoEx("mgv7_dungeon_ymax", dungeon_ymax);
- settings->getNoiseParams("mgv7_np_terrain_base", np_terrain_base);
- settings->getNoiseParams("mgv7_np_terrain_alt", np_terrain_alt);
- settings->getNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
- settings->getNoiseParams("mgv7_np_height_select", np_height_select);
- settings->getNoiseParams("mgv7_np_filler_depth", np_filler_depth);
- settings->getNoiseParams("mgv7_np_mount_height", np_mount_height);
- settings->getNoiseParams("mgv7_np_ridge_uwater", np_ridge_uwater);
- settings->getNoiseParams("mgv7_np_mountain", np_mountain);
- settings->getNoiseParams("mgv7_np_ridge", np_ridge);
- settings->getNoiseParams("mgv7_np_floatland", np_floatland);
- settings->getNoiseParams("mgv7_np_cavern", np_cavern);
- settings->getNoiseParams("mgv7_np_cave1", np_cave1);
- settings->getNoiseParams("mgv7_np_cave2", np_cave2);
- settings->getNoiseParams("mgv7_np_dungeons", np_dungeons);
- }
- void MapgenV7Params::writeParams(Settings *settings) const
- {
- settings->setFlagStr("mgv7_spflags", spflags, flagdesc_mapgen_v7);
- settings->setS16("mgv7_mount_zero_level", mount_zero_level);
- settings->setS16("mgv7_floatland_ymin", floatland_ymin);
- settings->setS16("mgv7_floatland_ymax", floatland_ymax);
- settings->setS16("mgv7_floatland_taper", floatland_taper);
- settings->setFloat("mgv7_float_taper_exp", float_taper_exp);
- settings->setFloat("mgv7_floatland_density", floatland_density);
- settings->setS16("mgv7_floatland_ywater", floatland_ywater);
- settings->setFloat("mgv7_cave_width", cave_width);
- settings->setS16("mgv7_large_cave_depth", large_cave_depth);
- settings->setU16("mgv7_small_cave_num_min", small_cave_num_min);
- settings->setU16("mgv7_small_cave_num_max", small_cave_num_max);
- settings->setU16("mgv7_large_cave_num_min", large_cave_num_min);
- settings->setU16("mgv7_large_cave_num_max", large_cave_num_max);
- settings->setFloat("mgv7_large_cave_flooded", large_cave_flooded);
- settings->setS16("mgv7_cavern_limit", cavern_limit);
- settings->setS16("mgv7_cavern_taper", cavern_taper);
- settings->setFloat("mgv7_cavern_threshold", cavern_threshold);
- settings->setS16("mgv7_dungeon_ymin", dungeon_ymin);
- settings->setS16("mgv7_dungeon_ymax", dungeon_ymax);
- settings->setNoiseParams("mgv7_np_terrain_base", np_terrain_base);
- settings->setNoiseParams("mgv7_np_terrain_alt", np_terrain_alt);
- settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
- settings->setNoiseParams("mgv7_np_height_select", np_height_select);
- settings->setNoiseParams("mgv7_np_filler_depth", np_filler_depth);
- settings->setNoiseParams("mgv7_np_mount_height", np_mount_height);
- settings->setNoiseParams("mgv7_np_ridge_uwater", np_ridge_uwater);
- settings->setNoiseParams("mgv7_np_mountain", np_mountain);
- settings->setNoiseParams("mgv7_np_ridge", np_ridge);
- settings->setNoiseParams("mgv7_np_floatland", np_floatland);
- settings->setNoiseParams("mgv7_np_cavern", np_cavern);
- settings->setNoiseParams("mgv7_np_cave1", np_cave1);
- settings->setNoiseParams("mgv7_np_cave2", np_cave2);
- settings->setNoiseParams("mgv7_np_dungeons", np_dungeons);
- }
- void MapgenV7Params::setDefaultSettings(Settings *settings)
- {
- settings->setDefault("mgv7_spflags", flagdesc_mapgen_v7,
- MGV7_MOUNTAINS | MGV7_RIDGES | MGV7_CAVERNS);
- }
- ////////////////////////////////////////////////////////////////////////////////
- int MapgenV7::getSpawnLevelAtPoint(v2s16 p)
- {
- // If rivers are enabled, first check if in a river
- if (spflags & MGV7_RIDGES) {
- float width = 0.2f;
- float uwatern = NoisePerlin2D(&noise_ridge_uwater->np, p.X, p.Y, seed) *
- 2.0f;
- if (std::fabs(uwatern) <= width)
- return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
- }
- // Terrain noise 'offset' is the average level of that terrain.
- // At least 50% of terrain will be below the higher of base and alt terrain
- // 'offset's.
- // Raising the maximum spawn level above 'water_level + 16' is necessary
- // for when terrain 'offset's are set much higher than water_level.
- s16 max_spawn_y = std::fmax(std::fmax(noise_terrain_alt->np.offset,
- noise_terrain_base->np.offset),
- water_level + 16);
- // Base terrain calculation
- s16 y = baseTerrainLevelAtPoint(p.X, p.Y);
- // If mountains are disabled, terrain level is base terrain level.
- // Avoids mid-air spawn where mountain terrain would have been.
- if (!(spflags & MGV7_MOUNTAINS)) {
- if (y < water_level || y > max_spawn_y)
- return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
- // y + 2 because y is surface level and due to biome 'dust'
- return y + 2;
- }
- // Search upwards for first node without mountain terrain
- int iters = 256;
- while (iters > 0 && y <= max_spawn_y) {
- if (!getMountainTerrainAtPoint(p.X, y + 1, p.Y)) {
- if (y <= water_level)
- return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
- // y + 1 due to biome 'dust'
- return y + 1;
- }
- y++;
- iters--;
- }
- // Unsuitable spawn point
- return MAX_MAP_GENERATION_LIMIT;
- }
- void MapgenV7::makeChunk(BlockMakeData *data)
- {
- // Pre-conditions
- assert(data->vmanip);
- assert(data->nodedef);
- //TimeTaker t("makeChunk");
- this->generating = true;
- this->vm = data->vmanip;
- this->ndef = data->nodedef;
- v3s16 blockpos_min = data->blockpos_min;
- v3s16 blockpos_max = data->blockpos_max;
- node_min = blockpos_min * MAP_BLOCKSIZE;
- node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
- full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
- full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
- blockseed = getBlockSeed2(full_node_min, seed);
- // Generate base and mountain terrain
- s16 stone_surface_max_y = generateTerrain();
- // Create heightmap
- updateHeightmap(node_min, node_max);
- // Init biome generator, place biome-specific nodes, and build biomemap
- if (flags & MG_BIOMES) {
- biomegen->calcBiomeNoise(node_min);
- generateBiomes();
- }
- // Generate tunnels, caverns and large randomwalk caves
- if (flags & MG_CAVES) {
- // Generate tunnels first as caverns confuse them
- generateCavesNoiseIntersection(stone_surface_max_y);
- // Generate caverns
- bool near_cavern = false;
- if (spflags & MGV7_CAVERNS)
- near_cavern = generateCavernsNoise(stone_surface_max_y);
- // Generate large randomwalk caves
- if (near_cavern)
- // Disable large randomwalk caves in this mapchunk by setting
- // 'large cave depth' to world base. Avoids excessive liquid in
- // large caverns and floating blobs of overgenerated liquid.
- generateCavesRandomWalk(stone_surface_max_y,
- -MAX_MAP_GENERATION_LIMIT);
- else
- generateCavesRandomWalk(stone_surface_max_y, large_cave_depth);
- }
- // Generate the registered ores
- if (flags & MG_ORES)
- m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
- // Generate dungeons
- if (flags & MG_DUNGEONS)
- generateDungeons(stone_surface_max_y);
- // Generate the registered decorations
- if (flags & MG_DECORATIONS)
- m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
- // Sprinkle some dust on top after everything else was generated
- if (flags & MG_BIOMES)
- dustTopNodes();
- // Update liquids
- updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
- // Calculate lighting
- // Limit floatland shadows
- bool propagate_shadow = !((spflags & MGV7_FLOATLANDS) &&
- node_max.Y >= floatland_ymin - csize.Y * 2 && node_min.Y <= floatland_ymax);
- if (flags & MG_LIGHT)
- calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
- full_node_min, full_node_max, propagate_shadow);
- this->generating = false;
- //printf("makeChunk: %lums\n", t.stop());
- }
- ////////////////////////////////////////////////////////////////////////////////
- float MapgenV7::baseTerrainLevelAtPoint(s16 x, s16 z)
- {
- float hselect = NoisePerlin2D(&noise_height_select->np, x, z, seed);
- hselect = rangelim(hselect, 0.0f, 1.0f);
- float persist = NoisePerlin2D(&noise_terrain_persist->np, x, z, seed);
- noise_terrain_base->np.persist = persist;
- float height_base = NoisePerlin2D(&noise_terrain_base->np, x, z, seed);
- noise_terrain_alt->np.persist = persist;
- float height_alt = NoisePerlin2D(&noise_terrain_alt->np, x, z, seed);
- if (height_alt > height_base)
- return height_alt;
- return (height_base * hselect) + (height_alt * (1.0f - hselect));
- }
- float MapgenV7::baseTerrainLevelFromMap(int index)
- {
- float hselect = rangelim(noise_height_select->result[index], 0.0f, 1.0f);
- float height_base = noise_terrain_base->result[index];
- float height_alt = noise_terrain_alt->result[index];
- if (height_alt > height_base)
- return height_alt;
- return (height_base * hselect) + (height_alt * (1.0f - hselect));
- }
- bool MapgenV7::getMountainTerrainAtPoint(s16 x, s16 y, s16 z)
- {
- float mnt_h_n =
- std::fmax(NoisePerlin2D(&noise_mount_height->np, x, z, seed), 1.0f);
- float density_gradient = -((float)(y - mount_zero_level) / mnt_h_n);
- float mnt_n = NoisePerlin3D(&noise_mountain->np, x, y, z, seed);
- return mnt_n + density_gradient >= 0.0f;
- }
- bool MapgenV7::getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y)
- {
- float mounthn = std::fmax(noise_mount_height->result[idx_xz], 1.0f);
- float density_gradient = -((float)(y - mount_zero_level) / mounthn);
- float mountn = noise_mountain->result[idx_xyz];
- return mountn + density_gradient >= 0.0f;
- }
- bool MapgenV7::getRiverChannelFromMap(int idx_xyz, int idx_xz, s16 y)
- {
- // Maximum width of river channel. Creates the vertical canyon walls
- float width = 0.2f;
- float absuwatern = std::fabs(noise_ridge_uwater->result[idx_xz]) * 2.0f;
- if (absuwatern > width)
- return false;
- float altitude = y - water_level;
- float height_mod = (altitude + 17.0f) / 2.5f;
- float width_mod = width - absuwatern;
- float nridge = noise_ridge->result[idx_xyz] * std::fmax(altitude, 0.0f) / 7.0f;
- return nridge + width_mod * height_mod >= 0.6f;
- }
- bool MapgenV7::getFloatlandTerrainFromMap(int idx_xyz, float float_offset)
- {
- return noise_floatland->result[idx_xyz] + floatland_density - float_offset >= 0.0f;
- }
- int MapgenV7::generateTerrain()
- {
- MapNode n_air(CONTENT_AIR);
- MapNode n_stone(c_stone);
- MapNode n_water(c_water_source);
- //// Calculate noise for terrain generation
- noise_terrain_persist->perlinMap2D(node_min.X, node_min.Z);
- float *persistmap = noise_terrain_persist->result;
- noise_terrain_base->perlinMap2D(node_min.X, node_min.Z, persistmap);
- noise_terrain_alt->perlinMap2D(node_min.X, node_min.Z, persistmap);
- noise_height_select->perlinMap2D(node_min.X, node_min.Z);
- if (spflags & MGV7_MOUNTAINS) {
- noise_mount_height->perlinMap2D(node_min.X, node_min.Z);
- noise_mountain->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
- }
- //// Floatlands
- // 'Generate floatlands in this mapchunk' bool for
- // simplification of condition checks in y-loop.
- bool gen_floatlands = false;
- u8 cache_index = 0;
- // Y values where floatland tapering starts
- s16 float_taper_ymax = floatland_ymax - floatland_taper;
- s16 float_taper_ymin = floatland_ymin + floatland_taper;
- if ((spflags & MGV7_FLOATLANDS) &&
- node_max.Y >= floatland_ymin && node_min.Y <= floatland_ymax) {
- gen_floatlands = true;
- // Calculate noise for floatland generation
- noise_floatland->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
- // Cache floatland noise offset values, for floatland tapering
- for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++, cache_index++) {
- float float_offset = 0.0f;
- if (y > float_taper_ymax) {
- float_offset = std::pow((y - float_taper_ymax) / (float)floatland_taper,
- float_taper_exp) * 4.0f;
- } else if (y < float_taper_ymin) {
- float_offset = std::pow((float_taper_ymin - y) / (float)floatland_taper,
- float_taper_exp) * 4.0f;
- }
- float_offset_cache[cache_index] = float_offset;
- }
- }
- // 'Generate rivers in this mapchunk' bool for
- // simplification of condition checks in y-loop.
- bool gen_rivers = (spflags & MGV7_RIDGES) && node_max.Y >= water_level - 16 &&
- !gen_floatlands;
- if (gen_rivers) {
- noise_ridge->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
- noise_ridge_uwater->perlinMap2D(node_min.X, node_min.Z);
- }
- //// Place nodes
- const v3s16 &em = vm->m_area.getExtent();
- s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
- u32 index2d = 0;
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 x = node_min.X; x <= node_max.X; x++, index2d++) {
- s16 surface_y = baseTerrainLevelFromMap(index2d);
- if (surface_y > stone_surface_max_y)
- stone_surface_max_y = surface_y;
- cache_index = 0;
- u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
- u32 index3d = (z - node_min.Z) * zstride_1u1d + (x - node_min.X);
- for (s16 y = node_min.Y - 1; y <= node_max.Y + 1;
- y++,
- index3d += ystride,
- VoxelArea::add_y(em, vi, 1),
- cache_index++) {
- if (vm->m_data[vi].getContent() != CONTENT_IGNORE)
- continue;
- bool is_river_channel = gen_rivers &&
- getRiverChannelFromMap(index3d, index2d, y);
- if (y <= surface_y && !is_river_channel) {
- vm->m_data[vi] = n_stone; // Base terrain
- } else if ((spflags & MGV7_MOUNTAINS) &&
- getMountainTerrainFromMap(index3d, index2d, y) &&
- !is_river_channel) {
- vm->m_data[vi] = n_stone; // Mountain terrain
- if (y > stone_surface_max_y)
- stone_surface_max_y = y;
- } else if (gen_floatlands &&
- getFloatlandTerrainFromMap(index3d,
- float_offset_cache[cache_index])) {
- vm->m_data[vi] = n_stone; // Floatland terrain
- if (y > stone_surface_max_y)
- stone_surface_max_y = y;
- } else if (y <= water_level) { // Surface water
- vm->m_data[vi] = n_water;
- } else if (gen_floatlands && y >= float_taper_ymax && y <= floatland_ywater) {
- vm->m_data[vi] = n_water; // Water for solid floatland layer only
- } else {
- vm->m_data[vi] = n_air; // Air
- }
- }
- }
- return stone_surface_max_y;
- }
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