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;
}
}
}
s16 MapgenFractal::generateTerrain()
{
MapNode n_air(CONTENT_AIR);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
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 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++, index2d++) {
if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
s16 seabed_height = noise_seabed->result[index2d];
if (y <= seabed_height || getFractalAtPoint(x, y, z)) {
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;
}
}
}
index2d -= ystride;
}
index2d += ystride;
}
return stone_surface_max_y;
}
void MapgenV7::generateTerrain() {
MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
MapNode n_stone(c_stone);
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++) {
s16 surface_y = heightmap[index];
Biome *biome = bmgr->biomes[biomemap[index]];
u32 i = vm->m_area.index(x, node_min.Y, z);
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
if (y <= surface_y) {
vm->m_data[i] = (y > water_level + biome->filler_height) ?
MapNode(biome->c_filler) : n_stone;
} else if (y <= water_level) {
vm->m_data[i] = n_water_source;
} else {
vm->m_data[i] = n_air;
}
}
vm->m_area.add_y(em, i, 1);
}
}
}
int MapgenV7::generateMountainTerrain(s16 ymax)
{
noise_mountain->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
noise_mount_height->perlinMap2D(node_min.X, node_min.Z);
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;
}
int MapgenIndev::generateGround() {
//TimeTaker timer1("Generating ground level");
MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
MapNode n_ice(c_ice), n_dirt(c_dirt),n_sand(c_sand), n_gravel(c_gravel), n_lava_source(c_lava_source);
int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
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++) {
// Surface height
s16 surface_y = (s16)baseTerrainLevelFromMap(index);
// Log it
if (surface_y > stone_surface_max_y)
stone_surface_max_y = surface_y;
auto bt = getBiome(index, v3POS(x, surface_y, z));
s16 heat = m_emerge->env->m_use_weather ? m_emerge->env->getServerMap().updateBlockHeat(m_emerge->env, v3POS(x,node_max.Y,z), nullptr, &heat_cache) : 0;
// Fill ground with stone
v3POS em = vm->m_area.getExtent();
u32 i = vm->m_area.index(x, node_min.Y, z);
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
if (!vm->m_data[i]) {
if (y <= surface_y) {
int index3 = (z - node_min.Z) * zstride + (y - node_min.Y) * ystride + (x - node_min.X) * xstride;
if (cave_noise_threshold && noise_cave_indev->result[index3] > cave_noise_threshold) {
vm->m_data[i] = n_air;
} else {
auto n = (y > water_level - surface_y && bt == BT_DESERT) ? n_desert_stone : layers_get(index3);
bool protect = n.getContent() != CONTENT_AIR;
if (cave_noise_threshold && noise_cave_indev->result[index3] > cave_noise_threshold - 50) {
vm->m_data[i] = protect ? n_stone : n; //cave shell without layers
protect = true;
} else {
vm->m_data[i] = n;
}
if (protect)
vm->m_flags[i] |= VOXELFLAG_CHECKED2; // no cave liquid
}
} else if (y <= water_level) {
vm->m_data[i] = (heat < 0 && y > heat/3) ? n_ice : n_water_source;
if (liquid_pressure && y <= 0)
vm->m_data[i].addLevel(m_emerge->ndef, water_level - y, 1);
} else {
vm->m_data[i] = n_air;
}
}
vm->m_area.add_y(em, i, 1);
}
}
return stone_surface_max_y;
}
int MapgenV7P::generateTerrain()
{
MapNode n_stone(c_stone);
MapNode n_bedrock(c_bedrock);
MapNode n_water(c_water_source);
MapNode n_air(CONTENT_AIR);
//// 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 & MGV7P_MOUNTAINS) {
noise_mount_height->perlinMap2D(node_min.X, node_min.Z);
noise_mountain ->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 (spflags & MGV7P_MOUNTAINS)
surface_y = MYMAX(mountainLevelFromMap(index2d), surface_y);
if (surface_y > stone_surface_max_y)
stone_surface_max_y = surface_y;
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 <= surface_y) {
if (y <= bedrock_level)
vm->m_data[vi] = n_bedrock; // Bedrock
else
vm->m_data[vi] = n_stone; // Base and mountain terrain
} else if (y <= water_level) {
vm->m_data[vi] = n_water; // Water
} else {
vm->m_data[vi] = n_air; // Air
}
}
vm->m_area.add_y(em, vi, 1);
}
}
return stone_surface_max_y;
}
void MapgenV7::generateBaseTerrain(s16 *stone_surface_min_y, s16 *stone_surface_max_y)
{
MapNode n_air(CONTENT_AIR);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
MapNode n_ice(c_ice);
v3s16 em = vm->m_area.getExtent();
s16 surface_min_y = MAX_MAP_GENERATION_LIMIT;
s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
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++) {
float surface_height = baseTerrainLevelFromMap(index);
s16 surface_y = (s16)surface_height;
heightmap[index] = surface_y;
ridge_heightmap[index] = surface_y;
if (surface_y < surface_min_y)
surface_min_y = surface_y;
if (surface_y > surface_max_y)
surface_max_y = surface_y;
s16 heat = m_emerge->env->m_use_weather ? m_emerge->env->getServerMap().updateBlockHeat(m_emerge->env, v3POS(x,node_max.Y,z), nullptr, &heat_cache) : 0;
u32 i = 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[i].getContent() == CONTENT_IGNORE) {
if (y <= surface_y) {
int index3 = (z - node_min.Z) * zstride +
(y - node_min.Y + 1) * ystride +
(x - node_min.X);
vm->m_data[i] = layers_get(index3);
}
else if (y <= water_level)
{
vm->m_data[i] = (heat < 0 && y > heat/3) ? n_ice : n_water;
if (liquid_pressure && y <= 0)
vm->m_data[i].addLevel(m_emerge->ndef, water_level - y, 1);
}
else
vm->m_data[i] = n_air;
}
vm->m_area.add_y(em, i, 1);
}
}
*stone_surface_min_y = surface_min_y;
*stone_surface_max_y = surface_max_y;
}
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;
bool use_noise = (spflags & MGFLAT_LAKES) || (spflags & MGFLAT_HILLS);
if (use_noise)
noise_terrain->perlinMap2D(node_min.X, node_min.Z);
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 = use_noise ? noise_terrain->result[ni2d] : 0.0f;
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;
}
int MapgenV6::generateGround()
{
//TimeTaker timer1("Generating ground level");
MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
MapNode n_ice(c_ice);
int stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
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++) {
// Surface height
s16 surface_y = (s16)baseTerrainLevelFromMap(index);
// Log it
if (surface_y > stone_surface_max_y)
stone_surface_max_y = surface_y;
BiomeV6Type bt = getBiome(v3POS(x, node_min.Y, z));
s16 heat = m_emerge->env->m_use_weather ? m_emerge->env->getServerMap().updateBlockHeat(m_emerge->env, v3POS(x,node_max.Y,z), nullptr, &heat_cache) : 0;
// Fill ground with stone
v3s16 em = vm->m_area.getExtent();
u32 i = vm->m_area.index(x, node_min.Y, z);
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
if (y <= surface_y) {
vm->m_data[i] = (y >= MGV6_DESERT_STONE_BASE - surface_y
&& bt == BT_DESERT) ?
n_desert_stone : n_stone;
} else if (y <= water_level) {
vm->m_data[i] = ((heat < 0 && y > heat/3) || (y >= MGV6_ICE_BASE
&& bt == BT_TUNDRA)) ?
n_ice : n_water_source;
if (liquid_pressure && y <= 0)
vm->m_data[i].addLevel(m_emerge->ndef, water_level - y, 1);
} else {
vm->m_data[i] = n_air;
}
}
vm->m_area.add_y(em, i, 1);
}
}
return stone_surface_max_y;
}
int MapgenV7::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 index2d = 0;
bool mountain_flag = spflags & MGV7_MOUNTAINS;
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);
heightmap[index2d] = surface_y; // Create base terrain heightmap
ridge_heightmap[index2d] = surface_y;
if (surface_y > stone_surface_max_y)
stone_surface_max_y = surface_y;
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 (mountain_flag &&
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 (y <= water_level) {
vm->m_data[vi] = n_water;
} else {
vm->m_data[vi] = n_air;
}
}
vm->m_area.add_y(em, vi, 1);
index3d += ystride;
}
}
return stone_surface_max_y;
}
int MapgenV6::generateGround()
{
//TimeTaker timer1("Generating ground level");
MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
MapNode n_ice(c_ice);
int stone_surface_max_y = -MAP_GENERATION_LIMIT;
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++) {
// Surface height
s16 surface_y = (s16)baseTerrainLevelFromMap(index);
// Log it
if (surface_y > stone_surface_max_y)
stone_surface_max_y = surface_y;
BiomeV6Type bt = getBiome(v2s16(x, z));
// Fill ground with stone
v3s16 em = vm->m_area.getExtent();
u32 i = vm->m_area.index(x, node_min.Y, z);
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
if (y <= surface_y) {
vm->m_data[i] = (y >= DESERT_STONE_BASE
&& bt == BT_DESERT) ?
n_desert_stone : n_stone;
} else if (y <= water_level) {
vm->m_data[i] = (y >= ICE_BASE
&& bt == BT_TUNDRA) ?
n_ice : n_water_source;
} else {
vm->m_data[i] = n_air;
}
}
vm->m_area.add_y(em, i, 1);
}
}
return stone_surface_max_y;
}
void MapgenV7::generateBaseTerrain(s16 *stone_surface_min_y, s16 *stone_surface_max_y)
{
MapNode n_air(CONTENT_AIR);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
v3s16 em = vm->m_area.getExtent();
s16 surface_min_y = MAX_MAP_GENERATION_LIMIT;
s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
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++) {
float surface_height = baseTerrainLevelFromMap(index);
s16 surface_y = (s16)surface_height;
heightmap[index] = surface_y;
ridge_heightmap[index] = surface_y;
if (surface_y < surface_min_y)
surface_min_y = surface_y;
if (surface_y > surface_max_y)
surface_max_y = surface_y;
u32 i = 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[i].getContent() == CONTENT_IGNORE) {
if (y <= surface_y)
vm->m_data[i] = n_stone;
else if (y <= water_level)
vm->m_data[i] = n_water;
else
vm->m_data[i] = n_air;
}
vm->m_area.add_y(em, i, 1);
}
}
*stone_surface_min_y = surface_min_y;
*stone_surface_max_y = surface_max_y;
}
void MapgenV7::generateMountainTerrain() {
if (node_max.Y <= water_level)
return;
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; y <= node_max.Y; 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);
if (getMountainTerrainFromMap(j, index, y))
vm->m_data[vi] = n_stone;
vi++;
j++;
}
}
}
int MapgenV6::generateGround() {
//TimeTaker timer1("Generating ground level");
MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
MapNode n_stone(c_stone), n_desert_stone(c_desert_stone);
MapNode n_ice(c_ice);
int stone_surface_max_y = -MAP_GENERATION_LIMIT;
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++) {
// Surface height
s16 surface_y = (s16)baseTerrainLevelFromMap(index);
// Log it
if (surface_y > stone_surface_max_y)
stone_surface_max_y = surface_y;
BiomeType bt = getBiome(index, v2s16(x, z));
// Fill ground with stone
v3s16 em = vm->m_area.getExtent();
u32 i = vm->m_area.index(x, node_min.Y, z);
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
if (y <= surface_y) {
vm->m_data[i] = (y > water_level - surface_y && bt == BT_DESERT) ?
n_desert_stone : n_stone;
} else if (y <= water_level) {
s16 heat = emerge->env->m_use_weather ? emerge->env->getServerMap().updateBlockHeat(emerge->env, v3s16(x,y,z)) : 0;
vm->m_data[i] = (heat < 0 && y > heat/3) ? n_ice : n_water_source;
} else {
vm->m_data[i] = n_air;
}
}
vm->m_area.add_y(em, i, 1);
}
}
return stone_surface_max_y;
}
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;
}
int MapgenValleys::generateTerrain()
{
// Raising this reduces the rate of evaporation.
static const float evaporation = 300.f;
// from the lua
static const float humidity_dropoff = 4.f;
// constant to convert altitude chill (compatible with lua) to heat
static const float alt_to_heat = 20.f;
// humidity reduction by altitude
static const float alt_to_humid = 10.f;
MapNode n_air(CONTENT_AIR);
MapNode n_river_water(c_river_water_source);
MapNode n_sand(c_sand);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
v3s16 em = vm->m_area.getExtent();
s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
u32 index_2d = 0;
for (s16 z = node_min.Z; z <= node_max.Z; z++)
for (s16 x = node_min.X; x <= node_max.X; x++, index_2d++) {
float river_y = noise_rivers->result[index_2d];
float surface_y = noise_terrain_height->result[index_2d];
float slope = noise_inter_valley_slope->result[index_2d];
float t_heat = m_bgen->heatmap[index_2d];
heightmap[index_2d] = -MAX_MAP_GENERATION_LIMIT;
if (surface_y > surface_max_y)
surface_max_y = ceil(surface_y);
if (humid_rivers) {
// Derive heat from (base) altitude. This will be most correct
// at rivers, since other surface heights may vary below.
if (use_altitude_chill && (surface_y > 0.f || river_y > 0.f))
t_heat -= alt_to_heat * MYMAX(surface_y, river_y) / altitude_chill;
// If humidity is low or heat is high, lower the water table.
float delta = m_bgen->humidmap[index_2d] - 50.f;
if (delta < 0.f) {
float t_evap = (t_heat - 32.f) / evaporation;
river_y += delta * MYMAX(t_evap, 0.08f);
}
}
u32 index_3d = (z - node_min.Z) * zstride_1u1d + (x - node_min.X);
u32 index_data = vm->m_area.index(x, node_min.Y - 1, z);
// Mapgens concern themselves with stone and water.
for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
if (vm->m_data[index_data].getContent() == CONTENT_IGNORE) {
float fill = noise_inter_valley_fill->result[index_3d];
float surface_delta = (float)y - surface_y;
bool river = y + 1 < river_y;
if (fabs(surface_delta) <= 0.5f && y > water_level && river) {
// river bottom
vm->m_data[index_data] = n_sand;
} else if (slope * fill > surface_delta) {
// ground
vm->m_data[index_data] = n_stone;
if (y > heightmap[index_2d])
heightmap[index_2d] = y;
if (y > surface_max_y)
surface_max_y = y;
} else if (y <= water_level) {
// sea
vm->m_data[index_data] = n_water;
} else if (river) {
// river
vm->m_data[index_data] = n_river_water;
} else {
vm->m_data[index_data] = n_air;
}
}
vm->m_area.add_y(em, index_data, 1);
index_3d += ystride;
}
// This happens if we're generating a chunk that doesn't
// contain the terrain surface, in which case, we need
// to set heightmap to a value outside of the chunk,
// to avoid confusing lua mods that use heightmap.
if (heightmap[index_2d] == -MAX_MAP_GENERATION_LIMIT) {
s16 surface_y_int = myround(surface_y);
if (surface_y_int > node_max.Y + 1 || surface_y_int < node_min.Y - 1) {
// If surface_y is outside the chunk, it's good enough.
heightmap[index_2d] = surface_y_int;
} else {
// If the ground is outside of this chunk, but surface_y
// is within the chunk, give a value outside.
heightmap[index_2d] = node_min.Y - 2;
}
}
if (humid_rivers) {
// Use base ground (water table) in a riverbed, to
// avoid an unnatural rise in humidity.
float t_alt = MYMAX(noise_rivers->result[index_2d], (float)heightmap[index_2d]);
float humid = m_bgen->humidmap[index_2d];
float water_depth = (t_alt - river_y) / humidity_dropoff;
humid *= 1.f + pow(0.5f, MYMAX(water_depth, 1.f));
// Reduce humidity with altitude (ignoring riverbeds).
// This is similar to the lua version's seawater adjustment,
// but doesn't increase the base humidity, which causes
// problems with the default biomes.
if (t_alt > 0.f)
humid -= alt_to_humid * t_alt / altitude_chill;
m_bgen->humidmap[index_2d] = humid;
}
// Assign the heat adjusted by any changed altitudes.
// The altitude will change about half the time.
if (use_altitude_chill) {
// ground height ignoring riverbeds
float t_alt = MYMAX(noise_rivers->result[index_2d], (float)heightmap[index_2d]);
if (humid_rivers && heightmap[index_2d] == (s16)myround(surface_y))
// The altitude hasn't changed. Use the first result.
m_bgen->heatmap[index_2d] = t_heat;
else if (t_alt > 0.f)
m_bgen->heatmap[index_2d] -= alt_to_heat * t_alt / altitude_chill;
}
}
return surface_max_y;
}
int MapgenValleys::generateTerrain()
{
MapNode n_air(CONTENT_AIR);
MapNode n_river_water(c_river_water_source);
MapNode n_sand(c_sand);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
v3s16 em = vm->m_area.getExtent();
s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
u32 index_2d = 0;
for (s16 z = node_min.Z; z <= node_max.Z; z++)
for (s16 x = node_min.X; x <= node_max.X; x++, index_2d++) {
s16 river_y = floor(noise_rivers->result[index_2d]);
s16 surface_y = floor(noise_terrain_height->result[index_2d]);
float slope = noise_inter_valley_slope->result[index_2d];
heightmap[index_2d] = surface_y;
if (surface_y > surface_max_y)
surface_max_y = surface_y;
u32 index_3d = (z - node_min.Z) * zstride + (x - node_min.X);
u32 index_data = vm->m_area.index(x, node_min.Y - 1, z);
// Mapgens concern themselves with stone and water.
for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
float fill = 0.f;
fill = noise_inter_valley_fill->result[index_3d];
if (vm->m_data[index_data].getContent() == CONTENT_IGNORE) {
bool river = (river_y > surface_y);
if (river && y == surface_y) {
// river bottom
vm->m_data[index_data] = n_sand;
} else if (river && y <= surface_y) {
// ground
vm->m_data[index_data] = n_stone;
} else if (river && y < river_y) {
// river
vm->m_data[index_data] = n_river_water;
} else if ((!river) && myround(fill * slope) >= y - surface_y) {
// ground
vm->m_data[index_data] = n_stone;
heightmap[index_2d] = surface_max_y = y;
} else if (y <= water_level) {
// sea
vm->m_data[index_data] = n_water;
} else {
vm->m_data[index_data] = n_air;
}
}
vm->m_area.add_y(em, index_data, 1);
index_3d += ystride;
}
// Although the original valleys adjusts humidity by distance
// from seawater, this causes problems with the default biomes.
// Adjust only by freshwater proximity.
const float humidity_offset = 0.8f; // derived by testing
if (humid_rivers)
noise_humidity->result[index_2d] *= (1 + pow(0.5f, MYMAX((surface_max_y
- noise_rivers->result[index_2d]) / 3.f, 0.f))) * humidity_offset;
// Assign the heat adjusted by altitude.
if (use_altitude_chill && surface_max_y > 0)
noise_heat->result[index_2d] *=
pow(0.5f, (surface_max_y - altitude_chill / 3.f) / altitude_chill);
}
return surface_max_y;
}
int MapgenMath::generateTerrain() {
MapNode n_air(CONTENT_AIR, LIGHT_SUN), n_water_source(c_water_source, LIGHT_SUN);
MapNode n_stone(c_stone, LIGHT_SUN);
u32 index = 0;
v3s16 em = vm->m_area.getExtent();
#if 1
/* debug
v3f vec0 = (v3f(node_min.X, node_min.Y, node_min.Z) - center) * scale ;
errorstream << " X=" << node_min.X << " Y=" << node_min.Y << " Z=" << node_min.Z
//<< " N="<< mengersponge(vec0.X, vec0.Y, vec0.Z, distance, iterations)
<< " N=" << (*func)(vec0.X, vec0.Y, vec0.Z, distance, iterations)
<< " Sc=" << scale << " gen=" << params["generator"].asString() << " J=" << Json::FastWriter().write(params) << std::endl;
*/
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]];
u32 i = vm->m_area.index(x, node_min.Y, z);
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
v3f vec = (v3f(x, y, z) - center) * scale ;
double d = (*func)(vec.X, vec.Y, vec.Z, distance, iterations);
if ((!invert && d > 0) || (invert && d == 0) ) {
if (vm->m_data[i].getContent() == CONTENT_IGNORE)
// vm->m_data[i] = (y > water_level + biome->filler) ?
// MapNode(biome->c_filler) : n_stone;
vm->m_data[i] = n_stone;
} else if (y <= water_level) {
vm->m_data[i] = n_water_source;
} else {
vm->m_data[i] = n_air;
}
vm->m_area.add_y(em, i, 1);
}
}
}
#endif
#if 0
// mandelbulber, unfinished but works
sFractal par;
par.doubles.N = 10;
par.doubles.power = 9.0;
par.doubles.foldingSphericalFixed = 1.0;
par.doubles.foldingSphericalMin = 0.5;
//no par.formula = smoothMandelbox; par.doubles.N = 40; invert = 0;//no
par.mandelbox.doubles.sharpness = 3.0;
par.mandelbox.doubles.scale = 1;
par.mandelbox.doubles.sharpness = 2;
par.mandelbox.doubles.foldingLimit = 1.0;
par.mandelbox.doubles.foldingValue = 2;
//ok par.formula = mandelboxVaryScale4D; par.doubles.N = 50; scale = 5; invert = 1; //ok
par.mandelbox.doubles.vary4D.scaleVary = 0.1;
par.mandelbox.doubles.vary4D.fold = 1;
par.mandelbox.doubles.vary4D.rPower = 1;
par.mandelbox.doubles.vary4D.minR = 0.5;
par.mandelbox.doubles.vary4D.wadd = 0;
par.doubles.constantFactor = 1.0;
par.formula = menger_sponge; par.doubles.N = 15; invert = 0; size = 30000; center = v3f(-size / 2, -size + (-2 * -invert), 2); scale = (double)1 / size; //ok
//double tresh = 1.5;
//par.formula = mandelbulb2; par.doubles.N = 10; scale = (double)1/size; invert=1; center = v3f(5,-size-5,0); //ok
//par.formula = hypercomplex; par.doubles.N = 20; scale = 0.0001; invert=1; center = v3f(0,-10001,0); //(double)50 / max_r;
//no par.formula = trig_DE; par.doubles.N = 5; scale = (double)10; invert=1;
//no par.formula = trig_optim; scale = (double)10; par.doubles.N = 4;
//par.formula = mandelbulb2; scale = (double)1/10000; par.doubles.N = 10; invert = 1; center = v3f(1,-4201,1); //ok
// no par.formula = tglad;
//par.formula = xenodreambuie; par.juliaMode = 1; par.doubles.julia.x = -1; par.doubles.power = 2.0; center=v3f(-size/2,-size/2-5,5); //ok
par.mandelbox.doubles.vary4D.scaleVary = 0.1;
par.mandelbox.doubles.vary4D.fold = 1;
par.mandelbox.doubles.vary4D.minR = 0.5;
par.mandelbox.doubles.vary4D.rPower = 1;
par.mandelbox.doubles.vary4D.wadd = 0;
//no par.formula = mandelboxVaryScale4D;
par.doubles.cadd = -1.3;
//par.formula = aexion; // ok but center
//par.formula = benesi; par.doubles.N = 10; center = v3f(0,0,0); invert = 0; //ok
// par.formula = bristorbrot; //ok
v3f vec0(node_min.X, node_min.Y, node_min.Z);
vec0 = (vec0 - center) * scale ;
errorstream << " X=" << node_min.X << " Y=" << node_min.Y << " Z=" << node_min.Z
<< " N=" << Compute<normal>(CVector3(vec0.X, vec0.Y, vec0.Z), par)
//<<" F="<< Compute<fake_AO>(CVector3(node_min.X,node_min.Y,node_min.Z), par)
//<<" L="<<node_min.getLength()<< " -="<<node_min.getLength() - Compute<normal>(CVector3(node_min.X,node_min.Y,node_min.Z), par)
<< " Sc=" << scale
<< std::endl;
for (s16 z = node_min.Z; z <= node_max.Z; z++)
for (s16 y = node_min.Y; y <= node_max.Y; y++) {
u32 i = vm->m_area.index(node_min.X, y, z);
for (s16 x = node_min.X; x <= node_max.X; x++) {
v3f vec(x, y, z);
vec = (vec - center) * scale ;
//double d = Compute<fake_AO>(CVector3(x,y,z), par);
double d = Compute<normal>(CVector3(vec.X, vec.Y, vec.Z), par);
//if (d>0)
// errorstream << " d=" << d <<" v="<< vec.getLength()<< " -="<< vec.getLength() - d <<" yad="
//<< Compute<normal>(CVector3(x,y,z), par)
//<< std::endl;
if ((!invert && d > 0) || (invert && d == 0)/*&& vec.getLength() - d > tresh*/ ) {
if (vm->m_data[i].getContent() == CONTENT_IGNORE)
vm->m_data[i] = n_stone;
} else {
vm->m_data[i] = n_air;
}
i++;
}
}
#endif
return 0;
}
int MapgenValleys::generateTerrain()
{
MapNode n_air(CONTENT_AIR);
MapNode n_river_water(c_river_water_source);
MapNode n_sand(c_sand);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
v3s16 em = vm->m_area.getExtent();
s16 surface_max_y = -MAX_MAP_GENERATION_LIMIT;
u32 index_2d = 0;
for (s16 z = node_min.Z; z <= node_max.Z; z++)
for (s16 x = node_min.X; x <= node_max.X; x++, index_2d++) {
s16 river_y = floor(noise_rivers->result[index_2d]);
s16 surface_y = floor(noise_terrain_height->result[index_2d]);
float slope = noise_inter_valley_slope->result[index_2d];
heightmap[index_2d] = surface_y;
if (surface_y > surface_max_y)
surface_max_y = surface_y;
u32 index_3d = 0;
if (!fast_terrain)
index_3d = (z - node_min.Z) * zstride + (x - node_min.X);
u32 index_data = vm->m_area.index(x, node_min.Y - 1, z);
// Mapgens concern themselves with stone and water.
for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
float fill = 0.f;
if (!fast_terrain)
fill = noise_inter_valley_fill->result[index_3d];
if (vm->m_data[index_data].getContent() == CONTENT_IGNORE) {
bool river = (river_y > surface_y);
if (river && y == surface_y) {
// river bottom
vm->m_data[index_data] = n_sand;
} else if ((fast_terrain || river) && y <= surface_y) {
// ground
vm->m_data[index_data] = n_stone;
} else if (river && y < river_y) {
// river
vm->m_data[index_data] = n_river_water;
} else if ((!fast_terrain) && (!river) && round(fill * slope) >= y - surface_y) {
// ground (slow method)
vm->m_data[index_data] = n_stone;
heightmap[index_2d] = surface_max_y = y;
} else if (y <= water_level) {
// sea
vm->m_data[index_data] = n_water;
} else {
vm->m_data[index_data] = n_air;
}
}
vm->m_area.add_y(em, index_data, 1);
if (!fast_terrain)
index_3d += ystride;
}
if (!fast_terrain) {
// Assign the humidity adjusted by water proximity.
noise_humidity->result[index_2d] = humidityByTerrain(
noise_humidity->result[index_2d],
surface_max_y,
noise_rivers->result[index_2d],
noise_valley_depth->result[index_2d]);
// Assign the heat adjusted by altitude. See humidity, above.
if (use_altitude_chill && surface_max_y > 0)
noise_heat->result[index_2d]
*= pow(0.5f, (surface_max_y - altitude_chill / 3.f) / altitude_chill);
}
}
return surface_max_y;
}
void MapgenV7::generateBiomes()
{
if (node_max.Y < water_level)
return;
MapNode n_air(CONTENT_AIR);
MapNode n_stone(c_stone);
MapNode n_water(c_water_source);
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->get(biomemap[index]);
s16 dfiller = biome->depth_filler + noise_filler_depth->result[index];
s16 y0_top = biome->depth_top;
s16 y0_filler = biome->depth_top + dfiller;
s16 shore_max = water_level + biome->height_shore;
s16 depth_water_top = biome->depth_water_top;
s16 nplaced = 0;
u32 i = vm->m_area.index(x, node_max.Y, z);
content_t c_above = vm->m_data[i + em.X].getContent();
bool have_air = c_above == CONTENT_AIR;
for (s16 y = node_max.Y; y >= node_min.Y; y--) {
content_t c = vm->m_data[i].getContent();
// It could be the case that the elevation is equal to the chunk
// boundary, but the chunk above has not been generated yet
if (y == node_max.Y && c_above == CONTENT_IGNORE &&
y == heightmap[index] && c == c_stone) {
int j = (z - node_min.Z) * zstride +
(y - node_min.Y) * ystride +
(x - node_min.X);
have_air = !getMountainTerrainFromMap(j, index, y);
}
if (c == c_stone && have_air) {
content_t c_below = vm->m_data[i - em.X].getContent();
if (c_below != CONTENT_AIR) {
if (nplaced < y0_top) {
if(y < water_level)
vm->m_data[i] = MapNode(biome->c_underwater);
else if(y <= shore_max)
vm->m_data[i] = MapNode(biome->c_shore_top);
else
vm->m_data[i] = MapNode(biome->c_top);
nplaced++;
} else if (nplaced < y0_filler && nplaced >= y0_top) {
if(y < water_level)
vm->m_data[i] = MapNode(biome->c_underwater);
else if(y <= shore_max)
vm->m_data[i] = MapNode(biome->c_shore_filler);
else
vm->m_data[i] = MapNode(biome->c_filler);
nplaced++;
} else if (c == c_stone) {
have_air = false;
nplaced = 0;
vm->m_data[i] = MapNode(biome->c_stone);
} else {
have_air = false;
nplaced = 0;
}
} else if (c == c_stone) {
have_air = false;
nplaced = 0;
vm->m_data[i] = MapNode(biome->c_stone);
}
} else if (c == c_stone) {
have_air = false;
nplaced = 0;
vm->m_data[i] = MapNode(biome->c_stone);
} else if (c == c_water_source) {
have_air = true;
nplaced = 0;
if(y > water_level - depth_water_top)
vm->m_data[i] = MapNode(biome->c_water_top);
else
vm->m_data[i] = MapNode(biome->c_water);
} else if (c == CONTENT_AIR) {
have_air = true;
nplaced = 0;
}
vm->m_area.add_y(em, i, -1);
}
}
}