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Mapgen: Add flat mapgen in hidden form

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This commit is contained in:
paramat 2015-10-30 02:45:38 +00:00
parent f3ac2517ea
commit 76c9abe4c8
7 changed files with 803 additions and 2 deletions
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1
build/android/jni/Android.mk
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@ -173,6 +173,7 @@ LOCAL_SRC_FILES := \
jni/src/mapblock.cpp \ jni/src/mapblock.cpp \
jni/src/mapblock_mesh.cpp \ jni/src/mapblock_mesh.cpp \
jni/src/mapgen.cpp \ jni/src/mapgen.cpp \
jni/src/mapgen_flat.cpp \
jni/src/mapgen_fractal.cpp \ jni/src/mapgen_fractal.cpp \
jni/src/mapgen_singlenode.cpp \ jni/src/mapgen_singlenode.cpp \
jni/src/mapgen_v5.cpp \ jni/src/mapgen_v5.cpp \

41
builtin/settingtypes.txt
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@ -812,7 +812,7 @@ liquid_update (Liquid update tick) float 1.0
# Name of map generator to be used when creating a new world. # Name of map generator to be used when creating a new world.
# Creating a world in the main menu will override this. # Creating a world in the main menu will override this.
mg_name (Mapgen name) enum v6 v5,v6,v7,fractal,singlenode mg_name (Mapgen name) enum v6 v5,v6,v7,flat,fractal,singlenode
# Water surface level of the world. # Water surface level of the world.
water_level (Water level) int 1 water_level (Water level) int 1
@ -928,6 +928,45 @@ mgv7_np_ridge (Mapgen v7 ridge noise parameters) noise_params 0, 1, (100, 100, 1
mgv7_np_cave1 (Mapgen v7 cave1 noise parameters) noise_params 0, 12, (100, 100, 100), 52534, 4, 0.5, 2.0 mgv7_np_cave1 (Mapgen v7 cave1 noise parameters) noise_params 0, 12, (100, 100, 100), 52534, 4, 0.5, 2.0
mgv7_np_cave2 (Mapgen v7 cave2 noise parameters) noise_params 0, 12, (100, 100, 100), 10325, 4, 0.5, 2.0 mgv7_np_cave2 (Mapgen v7 cave2 noise parameters) noise_params 0, 12, (100, 100, 100), 10325, 4, 0.5, 2.0
[***Mapgen flat]
# Map generation attributes specific to Mapgen flat.
# Occasional lakes and hills added to the flat world.
# Flags that are not specified in the flag string are not modified from the default.
# Flags starting with "no" are used to explicitly disable them.
mgflat_spflags (Mapgen flat flags) flags nolakes,nohills lakes,hills,nolakes,nohills
# Y of flat ground.
mgflat_ground_level (Mapgen flat ground level) int 8
# Y of upper limit of large pseudorandom caves.
mgflat_large_cave_depth (Mapgen flat large cave depth) int -33
# Terrain noise threshold for lakes.
# Controls proportion of world area covered by lakes.
# Adjust towards 0.0 for a larger proportion.
mgflat_lake_threshold (Mapgen flat lake threshold) float -0.45
# Controls steepness/depth of lake depressions.
mgflat_lake_steepness (Mapgen flat lake steepness) float 48.0
# Terrain noise threshold for hills.
# Controls proportion of world area covered by hills.
# Adjust towards 0.0 for a larger proportion.
mgflat_hill_threshold (Mapgen flat hill threshold) float 0.45
# Controls steepness/height of hills.
mgflat_hill_steepness (Mapgen flat hill steepness) float 64.0
# Determines terrain shape.
# The 3 numbers in brackets control the scale of the
# terrain, the 3 numbers should be identical.
mgflat_np_terrain (Mapgen flat terrain noise parameters) noise_params 0, 1, (600, 600, 600), 7244, 5, 0.6, 2.0
mgflat_np_filler_depth (Mapgen flat filler depth noise parameters) noise_params 0, 1.2, (150, 150, 150), 261, 3, 0.7, 2.0
mgflat_np_cave1 (Mapgen flat cave1 noise parameters) noise_params 0, 12, (128, 128, 128), 52534, 4, 0.5, 2.0
mgflat_np_cave2 (Mapgen flat cave2 noise parameters) noise_params 0, 12, (128, 128, 128), 10325, 4, 0.5, 2.0
[***Mapgen fractal] [***Mapgen fractal]
# Map generation attributes specific to Mapgen fractal. # Map generation attributes specific to Mapgen fractal.

54
minetest.conf.example
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@ -1000,7 +1000,7 @@
# Name of map generator to be used when creating a new world. # Name of map generator to be used when creating a new world.
# Creating a world in the main menu will override this. # Creating a world in the main menu will override this.
# type: enum values: v5, v6, v7, fractal, singlenode # type: enum values: v5, v6, v7, flat, fractal, singlenode
# mg_name = v6 # mg_name = v6
# Water surface level of the world. # Water surface level of the world.
@ -1179,6 +1179,58 @@
# type: noise_params # type: noise_params
# mgv7_np_cave2 = 0, 12, (100, 100, 100), 10325, 4, 0.5, 2.0 # mgv7_np_cave2 = 0, 12, (100, 100, 100), 10325, 4, 0.5, 2.0
#### Mapgen flat
# Map generation attributes specific to Mapgen flat.
# Occasional lakes and hills added to the flat world.
# Flags that are not specified in the flag string are not modified from the default.
# Flags starting with "no" are used to explicitly disable them.
# type: flags possible values: lakes, hills, nolakes, nohills
# mgflat_spflags = nolakes,nohills
# Y of flat ground.
# type: int
# mgflat_ground_level = 8
# Y of upper limit of large pseudorandom caves.
# type: int
# mgflat_large_cave_depth = -33
# Terrain noise threshold for lakes.
# Controls proportion of world area covered by lakes.
# Adjust towards 0.0 for a larger proportion.
# type: float
# mgflat_lake_threshold = -0.45
# Controls steepness/depth of lake depressions.
# type: float
# mgflat_lake_steepness = 48.0
# Terrain noise threshold for hills.
# Controls proportion of world area covered by hills.
# Adjust towards 0.0 for a larger proportion.
# type: float
# mgflat_hill_threshold = 0.45
# Controls steepness/height of hills.
# type: float
# mgflat_hill_steepness = 64.0
# Determines terrain shape.
# The 3 numbers in brackets control the scale of the
# terrain, the 3 numbers should be identical.
# type: noise_params
# mgflat_np_terrain = 0, 1, (600, 600, 600), 7244, 5, 0.6, 2.0
# type: noise_params
# mgflat_np_filler_depth = 0, 1.2, (150, 150, 150), 261, 3, 0.7, 2.0
# type: noise_params
# mgflat_np_cave1 = 0, 12, (128, 128, 128), 52534, 4, 0.5, 2.0
# type: noise_params
# mgflat_np_cave2 = 0, 12, (128, 128, 128), 10325, 4, 0.5, 2.0
#### Mapgen fractal #### Mapgen fractal
# Map generation attributes specific to Mapgen fractal. # Map generation attributes specific to Mapgen fractal.

1
src/CMakeLists.txt
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@ -367,6 +367,7 @@ set(common_SRCS
map.cpp map.cpp
mapblock.cpp mapblock.cpp
mapgen.cpp mapgen.cpp
mapgen_flat.cpp
mapgen_fractal.cpp mapgen_fractal.cpp
mapgen_singlenode.cpp mapgen_singlenode.cpp
mapgen_v5.cpp mapgen_v5.cpp

2
src/emerge.cpp
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@ -34,6 +34,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "log.h" #include "log.h"
#include "map.h" #include "map.h"
#include "mapblock.h" #include "mapblock.h"
#include "mapgen_flat.h"
#include "mapgen_fractal.h" #include "mapgen_fractal.h"
#include "mapgen_v5.h" #include "mapgen_v5.h"
#include "mapgen_v6.h" #include "mapgen_v6.h"
@ -105,6 +106,7 @@ MapgenDesc g_reg_mapgens[] = {
{"v5", new MapgenFactoryV5, true}, {"v5", new MapgenFactoryV5, true},
{"v6", new MapgenFactoryV6, true}, {"v6", new MapgenFactoryV6, true},
{"v7", new MapgenFactoryV7, true}, {"v7", new MapgenFactoryV7, true},
{"flat", new MapgenFactoryFlat, false},
{"fractal", new MapgenFactoryFractal, false}, {"fractal", new MapgenFactoryFractal, false},
{"singlenode", new MapgenFactorySinglenode, false}, {"singlenode", new MapgenFactorySinglenode, false},
}; };

581
src/mapgen_flat.cpp Normal file
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@ -0,0 +1,581 @@
/*
Minetest
Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2010-2015 paramat, Matt Gregory
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 "treegen.h"
#include "mg_biome.h"
#include "mg_ore.h"
#include "mg_decoration.h"
#include "mapgen_flat.h"
FlagDesc flagdesc_mapgen_flat[] = {
{"lakes", MGFLAT_LAKES},
{"hills", MGFLAT_HILLS},
{NULL, 0}
};
///////////////////////////////////////////////////////////////////////////////////////
MapgenFlat::MapgenFlat(int mapgenid, MapgenParams *params, EmergeManager *emerge)
: Mapgen(mapgenid, params, emerge)
{
this->m_emerge = emerge;
this->bmgr = emerge->biomemgr;
//// amount of elements to skip for the next index
//// for noise/height/biome maps (not vmanip)
this->ystride = csize.X;
this->zstride = csize.X * (csize.Y + 2);
this->biomemap = new u8[csize.X * csize.Z];
this->heightmap = new s16[csize.X * csize.Z];
this->heatmap = NULL;
this->humidmap = NULL;
MapgenFlatParams *sp = (MapgenFlatParams *)params->sparams;
this->spflags = sp->spflags;
this->ground_level = sp->ground_level;
this->large_cave_depth = sp->large_cave_depth;
this->lake_threshold = sp->lake_threshold;
this->lake_steepness = sp->lake_steepness;
this->hill_threshold = sp->hill_threshold;
this->hill_steepness = sp->hill_steepness;
//// 2D noise
noise_terrain = new Noise(&sp->np_terrain, seed, csize.X, csize.Z);
noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
//// 3D noise
noise_cave1 = new Noise(&sp->np_cave1, seed, csize.X, csize.Y + 2, csize.Z);
noise_cave2 = new Noise(&sp->np_cave2, seed, csize.X, csize.Y + 2, csize.Z);
//// Biome noise
noise_heat = new Noise(&params->np_biome_heat, seed, csize.X, csize.Z);
noise_humidity = new Noise(&params->np_biome_humidity, seed, csize.X, csize.Z);
noise_heat_blend = new Noise(&params->np_biome_heat_blend, seed, csize.X, csize.Z);
noise_humidity_blend = new Noise(&params->np_biome_humidity_blend, seed, csize.X, csize.Z);
//// Resolve nodes to be used
INodeDefManager *ndef = emerge->ndef;
c_stone = ndef->getId("mapgen_stone");
c_water_source = ndef->getId("mapgen_water_source");
c_lava_source = ndef->getId("mapgen_lava_source");
c_desert_stone = ndef->getId("mapgen_desert_stone");
c_ice = ndef->getId("mapgen_ice");
c_sandstone = ndef->getId("mapgen_sandstone");
c_cobble = ndef->getId("mapgen_cobble");
c_stair_cobble = ndef->getId("mapgen_stair_cobble");
c_mossycobble = ndef->getId("mapgen_mossycobble");
c_sandstonebrick = ndef->getId("mapgen_sandstonebrick");
c_stair_sandstonebrick = ndef->getId("mapgen_stair_sandstonebrick");
if (c_ice == CONTENT_IGNORE)
c_ice = CONTENT_AIR;
if (c_mossycobble == CONTENT_IGNORE)
c_mossycobble = c_cobble;
if (c_stair_cobble == CONTENT_IGNORE)
c_stair_cobble = c_cobble;
if (c_sandstonebrick == CONTENT_IGNORE)
c_sandstonebrick = c_sandstone;
if (c_stair_sandstonebrick == CONTENT_IGNORE)
c_stair_sandstonebrick = c_sandstone;
}
MapgenFlat::~MapgenFlat()
{
delete noise_terrain;
delete noise_filler_depth;
delete noise_cave1;
delete noise_cave2;
delete noise_heat;
delete noise_humidity;
delete noise_heat_blend;
delete noise_humidity_blend;
delete[] heightmap;
delete[] biomemap;
}
MapgenFlatParams::MapgenFlatParams()
{
spflags = 0;
ground_level = 8;
large_cave_depth = -33;
lake_threshold = -0.45;
lake_steepness = 48.0;
hill_threshold = 0.45;
hill_steepness = 64.0;
np_terrain = NoiseParams(0, 1, v3f(600, 600, 600), 7244, 5, 0.6, 2.0);
np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261, 3, 0.7, 2.0);
np_cave1 = NoiseParams(0, 12, v3f(128, 128, 128), 52534, 4, 0.5, 2.0);
np_cave2 = NoiseParams(0, 12, v3f(128, 128, 128), 10325, 4, 0.5, 2.0);
}
void MapgenFlatParams::readParams(const Settings *settings)
{
settings->getFlagStrNoEx("mgflat_spflags", spflags, flagdesc_mapgen_flat);
settings->getS16NoEx("mgflat_ground_level", ground_level);
settings->getS16NoEx("mgflat_large_cave_depth", large_cave_depth);
settings->getFloatNoEx("mgflat_lake_threshold", lake_threshold);
settings->getFloatNoEx("mgflat_lake_steepness", lake_steepness);
settings->getFloatNoEx("mgflat_hill_threshold", hill_threshold);
settings->getFloatNoEx("mgflat_hill_steepness", hill_steepness);
settings->getNoiseParams("mgflat_np_terrain", np_terrain);
settings->getNoiseParams("mgflat_np_filler_depth", np_filler_depth);
settings->getNoiseParams("mgflat_np_cave1", np_cave1);
settings->getNoiseParams("mgflat_np_cave2", np_cave2);
}
void MapgenFlatParams::writeParams(Settings *settings) const
{
settings->setFlagStr("mgflat_spflags", spflags, flagdesc_mapgen_flat, U32_MAX);
settings->setS16("mgflat_ground_level", ground_level);
settings->setS16("mgflat_large_cave_depth", large_cave_depth);
settings->setFloat("mgflat_lake_threshold", lake_threshold);
settings->setFloat("mgflat_lake_steepness", lake_steepness);
settings->setFloat("mgflat_hill_threshold", hill_threshold);
settings->setFloat("mgflat_hill_steepness", hill_steepness);
settings->setNoiseParams("mgflat_np_terrain", np_terrain);
settings->setNoiseParams("mgflat_np_filler_depth", np_filler_depth);
settings->setNoiseParams("mgflat_np_cave1", np_cave1);
settings->setNoiseParams("mgflat_np_cave2", np_cave2);
}
/////////////////////////////////////////////////////////////////
int MapgenFlat::getGroundLevelAtPoint(v2s16 p)
{
float n_terrain = NoisePerlin2D(&noise_terrain->np, p.X, p.Y, seed);
if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
s16 depress = (lake_threshold - n_terrain) * lake_steepness;
return ground_level - depress;
} else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
s16 rise = (n_terrain - hill_threshold) * hill_steepness;
return ground_level + rise;
} else {
return ground_level;
}
}
void MapgenFlat::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);
// Make some noise
calculateNoise();
// Generate base terrain, mountains, and ridges with initial heightmaps
s16 stone_surface_max_y = generateTerrain();
// Create heightmap
updateHeightmap(node_min, node_max);
// Create biomemap at heightmap surface
bmgr->calcBiomes(csize.X, csize.Z, noise_heat->result,
noise_humidity->result, heightmap, biomemap);
// Actually place the biome-specific nodes
MgStoneType stone_type = generateBiomes(noise_heat->result, noise_humidity->result);
if (flags & MG_CAVES)
generateCaves(stone_surface_max_y);
if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
DungeonParams dp;
dp.np_rarity = nparams_dungeon_rarity;
dp.np_density = nparams_dungeon_density;
dp.np_wetness = nparams_dungeon_wetness;
dp.c_water = c_water_source;
if (stone_type == STONE) {
dp.c_cobble = c_cobble;
dp.c_moss = c_mossycobble;
dp.c_stair = c_stair_cobble;
dp.diagonal_dirs = false;
dp.mossratio = 3.0;
dp.holesize = v3s16(1, 2, 1);
dp.roomsize = v3s16(0, 0, 0);
dp.notifytype = GENNOTIFY_DUNGEON;
} else if (stone_type == DESERT_STONE) {
dp.c_cobble = c_desert_stone;
dp.c_moss = c_desert_stone;
dp.c_stair = c_desert_stone;
dp.diagonal_dirs = true;
dp.mossratio = 0.0;
dp.holesize = v3s16(2, 3, 2);
dp.roomsize = v3s16(2, 5, 2);
dp.notifytype = GENNOTIFY_TEMPLE;
} else if (stone_type == SANDSTONE) {
dp.c_cobble = c_sandstonebrick;
dp.c_moss = c_sandstonebrick;
dp.c_stair = c_sandstonebrick;
dp.diagonal_dirs = false;
dp.mossratio = 0.0;
dp.holesize = v3s16(2, 2, 2);
dp.roomsize = v3s16(2, 0, 2);
dp.notifytype = GENNOTIFY_DUNGEON;
}
DungeonGen dgen(this, &dp);
dgen.generate(blockseed, full_node_min, full_node_max);
}
// Generate the registered 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());
updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
if (flags & MG_LIGHT)
calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
full_node_min, full_node_max);
//setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
// node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
this->generating = false;
}
void MapgenFlat::calculateNoise()
{
//TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
int x = node_min.X;
int y = node_min.Y - 1;
int z = node_min.Z;
if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
noise_terrain->perlinMap2D(x, z);
noise_filler_depth->perlinMap2D(x, z);
if (flags & MG_CAVES) {
noise_cave1->perlinMap3D(x, y, z);
noise_cave2->perlinMap3D(x, y, z);
}
noise_heat->perlinMap2D(x, z);
noise_humidity->perlinMap2D(x, z);
noise_heat_blend->perlinMap2D(x, z);
noise_humidity_blend->perlinMap2D(x, z);
for (s32 i = 0; i < csize.X * csize.Z; i++) {
noise_heat->result[i] += noise_heat_blend->result[i];
noise_humidity->result[i] += noise_humidity_blend->result[i];
}
heatmap = noise_heat->result;
humidmap = noise_humidity->result;
//printf("calculateNoise: %dus\n", t.stop());
}
s16 MapgenFlat::generateTerrain()
{
MapNode n_air(CONTENT_AIR);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
v3s16 em = vm->m_area.getExtent();
s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
u32 ni2d = 0;
for (s16 z = node_min.Z; z <= node_max.Z; z++)
for (s16 x = node_min.X; x <= node_max.X; x++, ni2d++) {
s16 stone_level = ground_level;
float n_terrain = 0.0f;
if ((spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS))
n_terrain = noise_terrain->result[ni2d];
if ((spflags & MGFLAT_LAKES) && n_terrain < lake_threshold) {
s16 depress = (lake_threshold - n_terrain) * lake_steepness;
stone_level = ground_level - depress;
} else if ((spflags & MGFLAT_HILLS) && n_terrain > hill_threshold) {
s16 rise = (n_terrain - hill_threshold) * hill_steepness;
stone_level = ground_level + rise;
}
u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
if (y <= stone_level) {
vm->m_data[vi] = n_stone;
if (y > stone_surface_max_y)
stone_surface_max_y = y;
} else if (y <= water_level) {
vm->m_data[vi] = n_water;
} else {
vm->m_data[vi] = n_air;
}
}
vm->m_area.add_y(em, vi, 1);
}
}
return stone_surface_max_y;
}
MgStoneType MapgenFlat::generateBiomes(float *heat_map, float *humidity_map)
{
v3s16 em = vm->m_area.getExtent();
u32 index = 0;
MgStoneType stone_type = STONE;
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 = NULL;
u16 depth_top = 0;
u16 base_filler = 0;
u16 depth_water_top = 0;
u32 vi = vm->m_area.index(x, node_max.Y, z);
// Check node at base of mapchunk above, either a node of a previously
// generated mapchunk or if not, a node of overgenerated base terrain.
content_t c_above = vm->m_data[vi + em.X].getContent();
bool air_above = c_above == CONTENT_AIR;
bool water_above = c_above == c_water_source;
// If there is air or water above enable top/filler placement, otherwise force
// nplaced to stone level by setting a number exceeding any possible filler depth.
u16 nplaced = (air_above || water_above) ? 0 : U16_MAX;
for (s16 y = node_max.Y; y >= node_min.Y; y--) {
content_t c = vm->m_data[vi].getContent();
// Biome is recalculated each time an upper surface is detected while
// working down a column. The selected biome then remains in effect for
// all nodes below until the next surface and biome recalculation.
// Biome is recalculated:
// 1. At the surface of stone below air or water.
// 2. At the surface of water below air.
// 3. When stone or water is detected but biome has not yet been calculated.
if ((c == c_stone && (air_above || water_above || !biome)) ||
(c == c_water_source && (air_above || !biome))) {
biome = bmgr->getBiome(heat_map[index], humidity_map[index], y);
depth_top = biome->depth_top;
base_filler = MYMAX(depth_top + biome->depth_filler
+ noise_filler_depth->result[index], 0);
depth_water_top = biome->depth_water_top;
// Detect stone type for dungeons during every biome calculation.
// This is more efficient than detecting per-node and will not
// miss any desert stone or sandstone biomes.
if (biome->c_stone == c_desert_stone)
stone_type = DESERT_STONE;
else if (biome->c_stone == c_sandstone)
stone_type = SANDSTONE;
}
if (c == c_stone) {
content_t c_below = vm->m_data[vi - em.X].getContent();
// If the node below isn't solid, make this node stone, so that
// any top/filler nodes above are structurally supported.
// This is done by aborting the cycle of top/filler placement
// immediately by forcing nplaced to stone level.
if (c_below == CONTENT_AIR || c_below == c_water_source)
nplaced = U16_MAX;
if (nplaced < depth_top) {
vm->m_data[vi] = MapNode(biome->c_top);
nplaced++;
} else if (nplaced < base_filler) {
vm->m_data[vi] = MapNode(biome->c_filler);
nplaced++;
} else {
vm->m_data[vi] = MapNode(biome->c_stone);
}
air_above = false;
water_above = false;
} else if (c == c_water_source) {
vm->m_data[vi] = MapNode((y > (s32)(water_level - depth_water_top)) ?
biome->c_water_top : biome->c_water);
nplaced = 0; // Enable top/filler placement for next surface
air_above = false;
water_above = true;
} else if (c == CONTENT_AIR) {
nplaced = 0; // Enable top/filler placement for next surface
air_above = true;
water_above = false;
} else { // Possible various nodes overgenerated from neighbouring mapchunks
nplaced = U16_MAX; // Disable top/filler placement
air_above = false;
water_above = false;
}
vm->m_area.add_y(em, vi, -1);
}
}
return stone_type;
}
void MapgenFlat::dustTopNodes()
{
if (node_max.Y < water_level)
return;
v3s16 em = vm->m_area.getExtent();
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 = (Biome *)bmgr->getRaw(biomemap[index]);
if (biome->c_dust == CONTENT_IGNORE)
continue;
u32 vi = vm->m_area.index(x, full_node_max.Y, z);
content_t c_full_max = vm->m_data[vi].getContent();
s16 y_start;
if (c_full_max == CONTENT_AIR) {
y_start = full_node_max.Y - 1;
} else if (c_full_max == CONTENT_IGNORE) {
vi = vm->m_area.index(x, node_max.Y + 1, z);
content_t c_max = vm->m_data[vi].getContent();
if (c_max == CONTENT_AIR)
y_start = node_max.Y;
else
continue;
} else {
continue;
}
vi = vm->m_area.index(x, y_start, z);
for (s16 y = y_start; y >= node_min.Y - 1; y--) {
if (vm->m_data[vi].getContent() != CONTENT_AIR)
break;
vm->m_area.add_y(em, vi, -1);
}
content_t c = vm->m_data[vi].getContent();
if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE && c != biome->c_dust) {
vm->m_area.add_y(em, vi, 1);
vm->m_data[vi] = MapNode(biome->c_dust);
}
}
}
void MapgenFlat::generateCaves(s16 max_stone_y)
{
if (max_stone_y >= node_min.Y) {
u32 index = 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++, vi++, index++) {
float d1 = contour(noise_cave1->result[index]);
float d2 = contour(noise_cave2->result[index]);
if (d1 * d2 > 0.4f) {
content_t c = vm->m_data[vi].getContent();
if (!ndef->get(c).is_ground_content || c == CONTENT_AIR)
continue;
vm->m_data[vi] = MapNode(CONTENT_AIR);
}
}
}
}
if (node_max.Y > large_cave_depth)
return;
PseudoRandom ps(blockseed + 21343);
u32 bruises_count = (ps.range(1, 4) == 1) ? ps.range(1, 2) : 0;
for (u32 i = 0; i < bruises_count; i++) {
CaveV5 cave(this, &ps);
cave.makeCave(node_min, node_max, max_stone_y);
}
}

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/*
Minetest
Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2010-2015 paramat, Matt Gregory
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.
*/
#ifndef MAPGEN_FLAT_HEADER
#define MAPGEN_FLAT_HEADER
#include "mapgen.h"
/////// Mapgen Flat flags
#define MGFLAT_LAKES 0x01
#define MGFLAT_HILLS 0x02
class BiomeManager;
extern FlagDesc flagdesc_mapgen_flat[];
struct MapgenFlatParams : public MapgenSpecificParams {
u32 spflags;
s16 ground_level;
s16 large_cave_depth;
float lake_threshold;
float lake_steepness;
float hill_threshold;
float hill_steepness;
NoiseParams np_terrain;
NoiseParams np_filler_depth;
NoiseParams np_cave1;
NoiseParams np_cave2;
MapgenFlatParams();
~MapgenFlatParams() {}
void readParams(const Settings *settings);
void writeParams(Settings *settings) const;
};
class MapgenFlat : public Mapgen {
public:
EmergeManager *m_emerge;
BiomeManager *bmgr;
int ystride;
int zstride;
u32 spflags;
v3s16 node_min;
v3s16 node_max;
v3s16 full_node_min;
v3s16 full_node_max;
s16 ground_level;
s16 large_cave_depth;
float lake_threshold;
float lake_steepness;
float hill_threshold;
float hill_steepness;
Noise *noise_terrain;
Noise *noise_filler_depth;
Noise *noise_cave1;
Noise *noise_cave2;
Noise *noise_heat;
Noise *noise_humidity;
Noise *noise_heat_blend;
Noise *noise_humidity_blend;
content_t c_stone;
content_t c_water_source;
content_t c_lava_source;
content_t c_desert_stone;
content_t c_ice;
content_t c_sandstone;
content_t c_cobble;
content_t c_stair_cobble;
content_t c_mossycobble;
content_t c_sandstonebrick;
content_t c_stair_sandstonebrick;
MapgenFlat(int mapgenid, MapgenParams *params, EmergeManager *emerge);
~MapgenFlat();
virtual void makeChunk(BlockMakeData *data);
int getGroundLevelAtPoint(v2s16 p);
void calculateNoise();
s16 generateTerrain();
MgStoneType generateBiomes(float *heat_map, float *humidity_map);
void dustTopNodes();
void generateCaves(s16 max_stone_y);
};
struct MapgenFactoryFlat : public MapgenFactory {
Mapgen *createMapgen(int mgid, MapgenParams *params, EmergeManager *emerge)
{
return new MapgenFlat(mgid, params, emerge);
};
MapgenSpecificParams *createMapgenParams()
{
return new MapgenFlatParams();
};
};
#endif