123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713 |
- /*
- Minetest
- Copyright (C) 2013-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
- Copyright (C) 2014-2017 paramat
- 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 "voxel.h"
- #include "noise.h"
- #include "mapblock.h"
- #include "mapnode.h"
- #include "map.h"
- #include "content_sao.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(int mapgenid, MapgenV7Params *params, EmergeManager *emerge)
- : MapgenBasic(mapgenid, params, emerge)
- {
- this->spflags = params->spflags;
- this->cave_width = params->cave_width;
- this->float_mount_density = params->float_mount_density;
- this->float_mount_height = params->float_mount_height;
- this->floatland_level = params->floatland_level;
- this->shadow_limit = params->shadow_limit;
- this->cavern_limit = params->cavern_limit;
- this->cavern_taper = params->cavern_taper;
- this->cavern_threshold = params->cavern_threshold;
- // 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)
- noise_mount_height = new Noise(¶ms->np_mount_height, seed, csize.X, csize.Z);
- if (spflags & MGV7_FLOATLANDS) {
- noise_floatland_base = new Noise(¶ms->np_floatland_base, seed, csize.X, csize.Z);
- noise_float_base_height = new Noise(¶ms->np_float_base_height, seed, csize.X, csize.Z);
- }
- if (spflags & MGV7_RIDGES) {
- 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);
- }
- // 3D noise, 1 up, 1 down overgeneration
- if ((spflags & MGV7_MOUNTAINS) || (spflags & MGV7_FLOATLANDS))
- noise_mountain = new Noise(¶ms->np_mountain, 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;
- }
- 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;
- if (spflags & MGV7_FLOATLANDS) {
- delete noise_floatland_base;
- delete noise_float_base_height;
- }
- if (spflags & MGV7_RIDGES) {
- delete noise_ridge_uwater;
- delete noise_ridge;
- }
- if ((spflags & MGV7_MOUNTAINS) || (spflags & MGV7_FLOATLANDS))
- delete noise_mountain;
- }
- MapgenV7Params::MapgenV7Params()
- {
- np_terrain_base = NoiseParams(4, 70, v3f(600, 600, 600), 82341, 5, 0.6, 2.0);
- np_terrain_alt = NoiseParams(4, 25, v3f(600, 600, 600), 5934, 5, 0.6, 2.0);
- np_terrain_persist = NoiseParams(0.6, 0.1, v3f(2000, 2000, 2000), 539, 3, 0.6, 2.0);
- np_height_select = NoiseParams(-8, 16, v3f(500, 500, 500), 4213, 6, 0.7, 2.0);
- np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261, 3, 0.7, 2.0);
- np_mount_height = NoiseParams(256, 112, v3f(1000, 1000, 1000), 72449, 3, 0.6, 2.0);
- np_ridge_uwater = NoiseParams(0, 1, v3f(1000, 1000, 1000), 85039, 5, 0.6, 2.0);
- np_floatland_base = NoiseParams(-0.6, 1.5, v3f(600, 600, 600), 114, 5, 0.6, 2.0);
- np_float_base_height = NoiseParams(48, 24, v3f(300, 300, 300), 907, 4, 0.7, 2.0);
- np_mountain = NoiseParams(-0.6, 1, v3f(250, 350, 250), 5333, 5, 0.63, 2.0);
- np_ridge = NoiseParams(0, 1, v3f(100, 100, 100), 6467, 4, 0.75, 2.0);
- np_cavern = NoiseParams(0, 1, v3f(384, 128, 384), 723, 5, 0.63, 2.0);
- np_cave1 = NoiseParams(0, 12, v3f(61, 61, 61), 52534, 3, 0.5, 2.0);
- np_cave2 = NoiseParams(0, 12, v3f(67, 67, 67), 10325, 3, 0.5, 2.0);
- }
- void MapgenV7Params::readParams(const Settings *settings)
- {
- settings->getFlagStrNoEx("mgv7_spflags", spflags, flagdesc_mapgen_v7);
- settings->getFloatNoEx("mgv7_cave_width", cave_width);
- settings->getFloatNoEx("mgv7_float_mount_density", float_mount_density);
- settings->getFloatNoEx("mgv7_float_mount_height", float_mount_height);
- settings->getS16NoEx("mgv7_floatland_level", floatland_level);
- settings->getS16NoEx("mgv7_shadow_limit", shadow_limit);
- settings->getS16NoEx("mgv7_cavern_limit", cavern_limit);
- settings->getS16NoEx("mgv7_cavern_taper", cavern_taper);
- settings->getFloatNoEx("mgv7_cavern_threshold", cavern_threshold);
- 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_floatland_base", np_floatland_base);
- settings->getNoiseParams("mgv7_np_float_base_height", np_float_base_height);
- settings->getNoiseParams("mgv7_np_mountain", np_mountain);
- settings->getNoiseParams("mgv7_np_ridge", np_ridge);
- settings->getNoiseParams("mgv7_np_cavern", np_cavern);
- settings->getNoiseParams("mgv7_np_cave1", np_cave1);
- settings->getNoiseParams("mgv7_np_cave2", np_cave2);
- }
- void MapgenV7Params::writeParams(Settings *settings) const
- {
- settings->setFlagStr("mgv7_spflags", spflags, flagdesc_mapgen_v7, U32_MAX);
- settings->setFloat("mgv7_cave_width", cave_width);
- settings->setFloat("mgv7_float_mount_density", float_mount_density);
- settings->setFloat("mgv7_float_mount_height", float_mount_height);
- settings->setS16("mgv7_floatland_level", floatland_level);
- settings->setS16("mgv7_shadow_limit", shadow_limit);
- settings->setS16("mgv7_cavern_limit", cavern_limit);
- settings->setS16("mgv7_cavern_taper", cavern_taper);
- settings->setFloat("mgv7_cavern_threshold", cavern_threshold);
- 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_floatland_base", np_floatland_base);
- settings->setNoiseParams("mgv7_np_float_base_height", np_float_base_height);
- settings->setNoiseParams("mgv7_np_mountain", np_mountain);
- settings->setNoiseParams("mgv7_np_ridge", np_ridge);
- settings->setNoiseParams("mgv7_np_cavern", np_cavern);
- settings->setNoiseParams("mgv7_np_cave1", np_cave1);
- settings->setNoiseParams("mgv7_np_cave2", np_cave2);
- }
- ///////////////////////////////////////////////////////////////////////////////
- int MapgenV7::getSpawnLevelAtPoint(v2s16 p)
- {
- // Base terrain calculation
- s16 y = baseTerrainLevelAtPoint(p.X, p.Y);
- // If enabled, check if inside a river
- if (spflags & MGV7_RIDGES) {
- float width = 0.2;
- float uwatern = NoisePerlin2D(&noise_ridge_uwater->np, p.X, p.Y, seed) * 2;
- if (fabs(uwatern) <= width)
- return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
- }
- // If mountains are disabled, terrain level is base terrain level
- // Avoids spawn on non-existant mountain terrain
- if (!(spflags & MGV7_MOUNTAINS)) {
- if (y <= water_level || y > water_level + 16)
- return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
- else
- return y;
- }
- // Mountain terrain calculation
- int iters = 128;
- while (iters--) {
- if (!getMountainTerrainAtPoint(p.X, y + 1, p.Y)) { // If air above
- if (y <= water_level || y > water_level + 16)
- return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
- else
- return y;
- }
- y++;
- }
- // Unsuitable spawn point, no mountain surface found
- return MAX_MAP_GENERATION_LIMIT;
- }
- void MapgenV7::makeChunk(BlockMakeData *data)
- {
- // Pre-conditions
- assert(data->vmanip);
- assert(data->nodedef);
- assert(data->blockpos_requested.X >= data->blockpos_min.X &&
- data->blockpos_requested.Y >= data->blockpos_min.Y &&
- data->blockpos_requested.Z >= data->blockpos_min.Z);
- assert(data->blockpos_requested.X <= data->blockpos_max.X &&
- data->blockpos_requested.Y <= data->blockpos_max.Y &&
- data->blockpos_requested.Z <= data->blockpos_max.Z);
- this->generating = true;
- this->vm = data->vmanip;
- this->ndef = data->nodedef;
- //TimeTaker t("makeChunk");
- 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
- // An initial heightmap is no longer created here for use in generateRidgeTerrain()
- s16 stone_surface_max_y = generateTerrain();
- // Generate rivers
- if (spflags & MGV7_RIDGES)
- generateRidgeTerrain();
- // Create heightmap
- updateHeightmap(node_min, node_max);
- // Init biome generator, place biome-specific nodes, and build biomemap
- biomegen->calcBiomeNoise(node_min);
- MgStoneType stone_type = generateBiomes();
- // Generate caverns, tunnels and classic caves
- if (flags & MG_CAVES) {
- bool near_cavern = false;
- // Generate caverns
- if (spflags & MGV7_CAVERNS)
- near_cavern = generateCaverns(stone_surface_max_y);
- // Generate tunnels and classic caves
- if (near_cavern)
- // Disable classic caves in this mapchunk by setting
- // 'large cave depth' to world base. Avoids excessive liquid in
- // large caverns and floating blobs of overgenerated liquid.
- generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
- else
- generateCaves(stone_surface_max_y, water_level);
- }
- // Generate dungeons
- if (flags & MG_DUNGEONS)
- generateDungeons(stone_surface_max_y, stone_type);
- // Generate the registered decorations
- if (flags & MG_DECORATIONS)
- m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
- // Generate the registered ores
- m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
- // Sprinkle some dust on top after everything else was generated
- dustTopNodes();
- //printf("makeChunk: %dms\n", t.stop());
- // Update liquids
- updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
- // Calculate lighting
- // Limit floatland shadow
- bool propagate_shadow = !((spflags & MGV7_FLOATLANDS) &&
- node_min.Y <= shadow_limit && node_max.Y >= shadow_limit);
- 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);
- //setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
- // node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
- this->generating = false;
- }
- float MapgenV7::baseTerrainLevelAtPoint(s16 x, s16 z)
- {
- float hselect = NoisePerlin2D(&noise_height_select->np, x, z, seed);
- hselect = rangelim(hselect, 0.0, 1.0);
- 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 * (1.0 - hselect));
- }
- float MapgenV7::baseTerrainLevelFromMap(int index)
- {
- float hselect = rangelim(noise_height_select->result[index], 0.0, 1.0);
- 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 * (1.0 - hselect));
- }
- bool MapgenV7::getMountainTerrainAtPoint(s16 x, s16 y, s16 z)
- {
- float mnt_h_n = NoisePerlin2D(&noise_mount_height->np, x, z, seed);
- float density_gradient = -((float)y / mnt_h_n);
- float mnt_n = NoisePerlin3D(&noise_mountain->np, x, y, z, seed);
- return mnt_n + density_gradient >= 0.0;
- }
- bool MapgenV7::getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y)
- {
- float mounthn = noise_mount_height->result[idx_xz];
- float density_gradient = -((float)y / mounthn);
- float mountn = noise_mountain->result[idx_xyz];
- return mountn + density_gradient >= 0.0;
- }
- bool MapgenV7::getFloatlandMountainFromMap(int idx_xyz, int idx_xz, s16 y)
- {
- // Make rim 2 nodes thick to match floatland base terrain
- float density_gradient = (y >= floatland_level) ?
- -pow((float)(y - floatland_level) / float_mount_height, 0.75f) :
- -pow((float)(floatland_level - 1 - y) / float_mount_height, 0.75f);
- float floatn = noise_mountain->result[idx_xyz] + float_mount_density;
- return floatn + density_gradient >= 0.0f;
- }
- void MapgenV7::floatBaseExtentFromMap(s16 *float_base_min, s16 *float_base_max, int idx_xz)
- {
- // '+1' to avoid a layer of stone at y = MAX_MAP_GENERATION_LIMIT
- s16 base_min = MAX_MAP_GENERATION_LIMIT + 1;
- s16 base_max = MAX_MAP_GENERATION_LIMIT;
- float n_base = noise_floatland_base->result[idx_xz];
- if (n_base > 0.0f) {
- float n_base_height = noise_float_base_height->result[idx_xz];
- float amp = n_base * n_base_height;
- float ridge = n_base_height / 3.0f;
- base_min = floatland_level - amp / 1.5f;
- if (amp > ridge * 2.0f) {
- // Lake bed
- base_max = floatland_level - (amp - ridge * 2.0f) / 2.0f;
- } else {
- // Hills and ridges
- float diff = fabs(amp - ridge) / ridge;
- // Smooth ridges using the 'smoothstep function'
- float smooth_diff = diff * diff * (3.0f - 2.0f * diff);
- base_max = floatland_level + ridge - smooth_diff * ridge;
- }
- }
- *float_base_min = base_min;
- *float_base_max = base_max;
- }
- 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) || (spflags & MGV7_FLOATLANDS)) {
- noise_mountain->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
- }
- if (spflags & MGV7_MOUNTAINS) {
- noise_mount_height->perlinMap2D(node_min.X, node_min.Z);
- }
- if (spflags & MGV7_FLOATLANDS) {
- noise_floatland_base->perlinMap2D(node_min.X, node_min.Z);
- noise_float_base_height->perlinMap2D(node_min.X, node_min.Z);
- }
- //// Place nodes
- 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;
- // Get extent of floatland base terrain
- // '+1' to avoid a layer of stone at y = MAX_MAP_GENERATION_LIMIT
- s16 float_base_min = MAX_MAP_GENERATION_LIMIT + 1;
- s16 float_base_max = MAX_MAP_GENERATION_LIMIT;
- if (spflags & MGV7_FLOATLANDS)
- floatBaseExtentFromMap(&float_base_min, &float_base_max, index2d);
- 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++) {
- if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
- if (y <= surface_y) {
- vm->m_data[vi] = n_stone; // Base terrain
- } else if ((spflags & MGV7_MOUNTAINS) &&
- getMountainTerrainFromMap(index3d, index2d, y)) {
- vm->m_data[vi] = n_stone; // Mountain terrain
- if (y > stone_surface_max_y)
- stone_surface_max_y = y;
- } else if ((spflags & MGV7_FLOATLANDS) &&
- ((y >= float_base_min && y <= float_base_max) ||
- getFloatlandMountainFromMap(index3d, index2d, y))) {
- vm->m_data[vi] = n_stone; // Floatland terrain
- stone_surface_max_y = node_max.Y;
- } else if (y <= water_level) {
- vm->m_data[vi] = n_water; // Ground level water
- } else if ((spflags & MGV7_FLOATLANDS) &&
- (y >= float_base_max && y <= floatland_level)) {
- vm->m_data[vi] = n_water; // Floatland water
- } else {
- vm->m_data[vi] = n_air;
- }
- }
- vm->m_area.add_y(em, vi, 1);
- index3d += ystride;
- }
- }
- return stone_surface_max_y;
- }
- void MapgenV7::generateRidgeTerrain()
- {
- if ((node_max.Y < water_level - 16) || (node_max.Y > shadow_limit))
- return;
- noise_ridge->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
- noise_ridge_uwater->perlinMap2D(node_min.X, node_min.Z);
- MapNode n_water(c_water_source);
- MapNode n_air(CONTENT_AIR);
- u32 index = 0;
- float width = 0.2;
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
- u32 vi = vm->m_area.index(node_min.X, y, z);
- for (s16 x = node_min.X; x <= node_max.X; x++, index++, vi++) {
- int j = (z - node_min.Z) * csize.X + (x - node_min.X);
- float uwatern = noise_ridge_uwater->result[j] * 2;
- if (fabs(uwatern) > width)
- continue;
- float altitude = y - water_level;
- float height_mod = (altitude + 17) / 2.5;
- float width_mod = width - fabs(uwatern);
- float nridge = noise_ridge->result[index] * MYMAX(altitude, 0) / 7.0;
- if (nridge + width_mod * height_mod < 0.6)
- continue;
- vm->m_data[vi] = (y > water_level) ? n_air : n_water;
- }
- }
- }
- ////////////////////////////////////////////////////////////////////////////////
- //// Code Boneyard
- ////
- //// Much of the stuff here has potential to become useful again at some point
- //// in the future, but we don't want it to get lost or forgotten in version
- //// control.
- ////
- #if 0
- int MapgenV7::generateMountainTerrain(s16 ymax)
- {
- MapNode n_stone(c_stone);
- u32 j = 0;
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
- u32 vi = vm->m_area.index(node_min.X, y, z);
- for (s16 x = node_min.X; x <= node_max.X; x++) {
- int index = (z - node_min.Z) * csize.X + (x - node_min.X);
- content_t c = vm->m_data[vi].getContent();
- if (getMountainTerrainFromMap(j, index, y)
- && (c == CONTENT_AIR || c == c_water_source)) {
- vm->m_data[vi] = n_stone;
- if (y > ymax)
- ymax = y;
- }
- vi++;
- j++;
- }
- }
- return ymax;
- }
- #endif
- #if 0
- void MapgenV7::carveRivers() {
- MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
- MapNode n_stone(c_stone);
- u32 index = 0;
- int river_depth = 4;
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
- float terrain_mod = noise_terrain_mod->result[index];
- NoiseParams *np = noise_terrain_river->np;
- np.persist = noise_terrain_persist->result[index];
- float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
- float height = terrain_river * (1 - abs(terrain_mod)) *
- noise_terrain_river->np.scale;
- height = log(height * height); //log(h^3) is pretty interesting for terrain
- s16 y = heightmap[index];
- if (height < 1.0 && y > river_depth &&
- y - river_depth >= node_min.Y && y <= node_max.Y) {
- for (s16 ry = y; ry != y - river_depth; ry--) {
- u32 vi = vm->m_area.index(x, ry, z);
- vm->m_data[vi] = n_air;
- }
- u32 vi = vm->m_area.index(x, y - river_depth, z);
- vm->m_data[vi] = n_water_source;
- }
- }
- }
- #endif
- #if 0
- void MapgenV7::addTopNodes()
- {
- v3s16 em = vm->m_area.getExtent();
- s16 ntopnodes;
- u32 index = 0;
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
- Biome *biome = bmgr->biomes[biomemap[index]];
- //////////////////// First, add top nodes below the ridge
- s16 y = ridge_heightmap[index];
- // This cutoff is good enough, but not perfect.
- // It will cut off potentially placed top nodes at chunk boundaries
- if (y < node_min.Y)
- continue;
- if (y > node_max.Y) {
- y = node_max.Y; // Let's see if we can still go downward anyway
- u32 vi = vm->m_area.index(x, y, z);
- content_t c = vm->m_data[vi].getContent();
- if (ndef->get(c).walkable)
- continue;
- }
- // N.B. It is necessary to search downward since ridge_heightmap[i]
- // might not be the actual height, just the lowest part in the chunk
- // where a ridge had been carved
- u32 i = vm->m_area.index(x, y, z);
- for (; y >= node_min.Y; y--) {
- content_t c = vm->m_data[i].getContent();
- if (ndef->get(c).walkable)
- break;
- vm->m_area.add_y(em, i, -1);
- }
- if (y != node_min.Y - 1 && y >= water_level) {
- ridge_heightmap[index] = y; //update ridgeheight
- ntopnodes = biome->top_depth;
- for (; y <= node_max.Y && ntopnodes; y++) {
- ntopnodes--;
- vm->m_data[i] = MapNode(biome->c_top);
- vm->m_area.add_y(em, i, 1);
- }
- // If dirt, grow grass on it.
- if (y > water_level - 10 &&
- vm->m_data[i].getContent() == CONTENT_AIR) {
- vm->m_area.add_y(em, i, -1);
- if (vm->m_data[i].getContent() == c_dirt)
- vm->m_data[i] = MapNode(c_dirt_with_grass);
- }
- }
- //////////////////// Now, add top nodes on top of the ridge
- y = heightmap[index];
- if (y > node_max.Y) {
- y = node_max.Y; // Let's see if we can still go downward anyway
- u32 vi = vm->m_area.index(x, y, z);
- content_t c = vm->m_data[vi].getContent();
- if (ndef->get(c).walkable)
- continue;
- }
- i = vm->m_area.index(x, y, z);
- for (; y >= node_min.Y; y--) {
- content_t c = vm->m_data[i].getContent();
- if (ndef->get(c).walkable)
- break;
- vm->m_area.add_y(em, i, -1);
- }
- if (y != node_min.Y - 1) {
- ntopnodes = biome->top_depth;
- // Let's see if we've already added it...
- if (y == ridge_heightmap[index] + ntopnodes - 1)
- continue;
- for (; y <= node_max.Y && ntopnodes; y++) {
- ntopnodes--;
- vm->m_data[i] = MapNode(biome->c_top);
- vm->m_area.add_y(em, i, 1);
- }
- // If dirt, grow grass on it.
- if (y > water_level - 10 &&
- vm->m_data[i].getContent() == CONTENT_AIR) {
- vm->m_area.add_y(em, i, -1);
- if (vm->m_data[i].getContent() == c_dirt)
- vm->m_data[i] = MapNode(c_dirt_with_grass);
- }
- }
- }
- }
- #endif
|