void DungeonGen::generate(ManualMapVoxelManipulator *vm, u32 bseed,
v3s16 nmin, v3s16 nmax) {
//TimeTaker t("gen dungeons");
int approx_groundlevel = 10 + water_level;
if ((nmin.Y + nmax.Y) / 2 >= approx_groundlevel ||
NoisePerlin3D(np_rarity, nmin.X, nmin.Y, nmin.Z, mapseed) < 0.2)
return;
this->vmanip = vm;
this->blockseed = bseed;
random.seed(bseed + 2);
cid_water_source = ndef->getId("mapgen_water_source");
cid_cobble = ndef->getId("mapgen_cobble");
cid_mossycobble = ndef->getId("mapgen_mossycobble");
//cid_torch = ndef->getId("default:torch");
cid_cobblestair = ndef->getId("mapgen_stair_cobble");
// Dungeon generator doesn't modify places which have this set
vmanip->clearFlag(VMANIP_FLAG_DUNGEON_INSIDE | VMANIP_FLAG_DUNGEON_PRESERVE);
// Set all air and water to be untouchable to make dungeons open
// to caves and open air
for (s16 z = nmin.Z; z <= nmax.Z; z++) {
for (s16 y = nmin.Y; y <= nmax.Y; y++) {
u32 i = vmanip->m_area.index(nmin.X, y, z);
for (s16 x = nmin.X; x <= nmax.X; x++) {
content_t c = vmanip->m_data[i].getContent();
if (c == CONTENT_AIR || c == cid_water_source)
vmanip->m_flags[i] |= VMANIP_FLAG_DUNGEON_PRESERVE;
i++;
}
}
}
// Add it
makeDungeon(v3s16(1,1,1) * MAP_BLOCKSIZE);
// Convert some cobble to mossy cobble
for (s16 z = nmin.Z; z <= nmax.Z; z++) {
for (s16 y = nmin.Y; y <= nmax.Y; y++) {
u32 i = vmanip->m_area.index(nmin.X, y, z);
for (s16 x = nmin.X; x <= nmax.X; x++) {
if (vmanip->m_data[i].getContent() == cid_cobble) {
float wetness = NoisePerlin3D(np_wetness, x, y, z, mapseed);
float density = NoisePerlin3D(np_density, x, y, z, blockseed);
if (density < wetness / 3.0)
vmanip->m_data[i].setContent(cid_mossycobble);
}
i++;
}
}
}
//printf("== gen dungeons: %dms\n", t.stop());
}
void DungeonGen::generate(MMVManip *vm, u32 bseed, v3s16 nmin, v3s16 nmax)
{
assert(vm);
//TimeTaker t("gen dungeons");
if (nmin.Y < dp.y_min || nmax.Y > dp.y_max)
return;
float nval_density = NoisePerlin3D(&dp.np_density, nmin.X, nmin.Y, nmin.Z, dp.seed);
if (nval_density < 1.0f)
return;
this->vm = vm;
this->blockseed = bseed;
random.seed(bseed + 2);
// Dungeon generator doesn't modify places which have this set
vm->clearFlag(VMANIP_FLAG_DUNGEON_INSIDE | VMANIP_FLAG_DUNGEON_PRESERVE);
// Set all air and water to be untouchable
// to make dungeons open to caves and open air
for (s16 z = nmin.Z; z <= nmax.Z; z++) {
for (s16 y = nmin.Y; y <= nmax.Y; y++) {
u32 i = vm->m_area.index(nmin.X, y, z);
for (s16 x = nmin.X; x <= nmax.X; x++) {
content_t c = vm->m_data[i].getContent();
if (c == CONTENT_AIR || c == dp.c_water || c == dp.c_river_water)
vm->m_flags[i] |= VMANIP_FLAG_DUNGEON_PRESERVE;
i++;
}
}
}
// Add them
for (u32 i = 0; i < floor(nval_density); i++)
makeDungeon(v3s16(1, 1, 1) * MAP_BLOCKSIZE);
// Optionally convert some structure to alternative structure
if (dp.c_alt_wall == CONTENT_IGNORE)
return;
for (s16 z = nmin.Z; z <= nmax.Z; z++)
for (s16 y = nmin.Y; y <= nmax.Y; y++) {
u32 i = vm->m_area.index(nmin.X, y, z);
for (s16 x = nmin.X; x <= nmax.X; x++) {
if (vm->m_data[i].getContent() == dp.c_wall) {
if (NoisePerlin3D(&dp.np_alt_wall, x, y, z, blockseed) > 0.0f)
vm->m_data[i].setContent(dp.c_alt_wall);
}
i++;
}
}
//printf("== gen dungeons: %dms\n", t.stop());
}
void DungeonGen::generate(u32 bseed, v3s16 nmin, v3s16 nmax)
{
//TimeTaker t("gen dungeons");
if (NoisePerlin3D(&dp.np_rarity, nmin.X, nmin.Y, nmin.Z, mg->seed) < 0.2)
return;
this->blockseed = bseed;
random.seed(bseed + 2);
// Dungeon generator doesn't modify places which have this set
vm->clearFlag(VMANIP_FLAG_DUNGEON_INSIDE | VMANIP_FLAG_DUNGEON_PRESERVE);
bool no_float = !g_settings->getBool("enable_floating_dungeons");
// Set all air and water (and optionally ignore) to be untouchable
// to make dungeons open to caves and open air
for (s16 z = nmin.Z; z <= nmax.Z; z++) {
for (s16 y = nmin.Y; y <= nmax.Y; y++) {
u32 i = vm->m_area.index(nmin.X, y, z);
for (s16 x = nmin.X; x <= nmax.X; x++) {
content_t c = vm->m_data[i].getContent();
if (c == CONTENT_AIR || c == dp.c_water ||
(no_float && c == CONTENT_IGNORE))
vm->m_flags[i] |= VMANIP_FLAG_DUNGEON_PRESERVE;
i++;
}
}
}
// Add it
makeDungeon(v3s16(1, 1, 1) * MAP_BLOCKSIZE);
// Convert some cobble to mossy cobble
if (dp.mossratio != 0.0) {
for (s16 z = nmin.Z; z <= nmax.Z; z++)
for (s16 y = nmin.Y; y <= nmax.Y; y++) {
u32 i = vm->m_area.index(nmin.X, y, z);
for (s16 x = nmin.X; x <= nmax.X; x++) {
if (vm->m_data[i].getContent() == dp.c_cobble) {
float wetness = NoisePerlin3D(&dp.np_wetness, x, y, z, mg->seed);
float density = NoisePerlin3D(&dp.np_density, x, y, z, blockseed);
if (density < wetness / dp.mossratio)
vm->m_data[i].setContent(dp.c_moss);
}
i++;
}
}
}
//printf("== gen dungeons: %dms\n", t.stop());
}
int MapgenV5::getGroundLevelAtPoint(v2s16 p)
{
//TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
if (f < 0.01)
f = 0.01;
else if (f >= 1.0)
f *= 1.6;
float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
s16 search_top = water_level + 15;
s16 search_base = water_level;
s16 level = -31000;
for (s16 y = search_top; y >= search_base; y--) {
float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
if (n_ground * f > y - h) {
if (y >= search_top - 7)
break;
else
level = y;
break;
}
}
//printf("getGroundLevelAtPoint: %dus\n", t.stop());
return level;
}
int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
{
//TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
if (f < 0.01)
f = 0.01;
else if (f >= 1.0)
f *= 1.6;
float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
for (s16 y = 128; y >= -128; y--) {
float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
if (n_ground * f > y - h) { // If solid
// If either top 2 nodes of search are solid this is inside a
// mountain or floatland with possibly no space for the player to spawn.
if (y >= 127) {
return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
} else { // Ground below at least 2 nodes of empty space
if (y <= water_level || y > water_level + 16)
return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
else
return y;
}
}
}
//printf("getGroundLevelAtPoint: %dus\n", t.stop());
return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn position, no ground found
}
void OreScatter::generate(ManualMapVoxelManipulator *vm, int seed,
u32 blockseed, v3s16 nmin, v3s16 nmax) {
PseudoRandom pr(blockseed);
MapNode n_ore(ore, 0, ore_param2);
int volume = (nmax.X - nmin.X + 1) *
(nmax.Y - nmin.Y + 1) *
(nmax.Z - nmin.Z + 1);
int csize = clust_size;
int orechance = (csize * csize * csize) / clust_num_ores;
int nclusters = volume / clust_scarcity;
for (int i = 0; i != nclusters; i++) {
int x0 = pr.range(nmin.X, nmax.X - csize + 1);
int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
if (np && (NoisePerlin3D(np, x0, y0, z0, seed) < nthresh))
continue;
for (int z1 = 0; z1 != csize; z1++)
for (int y1 = 0; y1 != csize; y1++)
for (int x1 = 0; x1 != csize; x1++) {
if (pr.range(1, orechance) != 1)
continue;
u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
for (size_t ii = 0; ii < wherein.size(); ii++)
if (vm->m_data[i].getContent() == wherein[ii])
vm->m_data[i] = n_ore;
}
}
}
int MapgenV5::getGroundLevelAtPoint(v2s16 p)
{
//TimeTaker t("getGroundLevelAtPoint", NULL, PRECISION_MICRO);
float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
if (f < 0.01)
f = 0.01;
else if (f >= 1.0)
f *= 1.6;
float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
s16 search_start = 128; // Only bother searching this range, actual
s16 search_end = -128; // ground level is rarely higher or lower.
for (s16 y = search_start; y >= search_end; y--) {
float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
// If solid
if (n_ground * f > y - h) {
// If either top 2 nodes of search are solid this is inside a
// mountain or floatland with no space for the player to spawn.
if (y >= search_start - 1)
return MAX_MAP_GENERATION_LIMIT;
else
return y; // Ground below at least 2 nodes of space
}
}
//printf("getGroundLevelAtPoint: %dus\n", t.stop());
return -MAX_MAP_GENERATION_LIMIT;
}
bool MapgenV7::getMountainTerrainAtPoint(int x, int y, int z) {
float mnt_h_n = NoisePerlin2D(&noise_mount_height->np, x, z, seed);
float height_modifier = -((float)y / rangelim(mnt_h_n, 80.0, 150.0));
float mnt_n = NoisePerlin3D(&noise_mountain->np, x, y, z, seed);
return mnt_n + height_modifier >= 0.6;
}
int MapgenV5::getSpawnLevelAtPoint(v2s16 p)
{
float f = 0.55 + NoisePerlin2D(&noise_factor->np, p.X, p.Y, seed);
if (f < 0.01)
f = 0.01;
else if (f >= 1.0)
f *= 1.6;
float h = NoisePerlin2D(&noise_height->np, p.X, p.Y, seed);
// noise_height 'offset' is the average level of terrain. At least 50% of
// terrain will be below this.
// Raising the maximum spawn level above 'water_level + 16' is necessary
// for when noise_height 'offset' is set much higher than water_level.
s16 max_spawn_y = MYMAX(noise_height->np.offset, water_level + 16);
// Starting spawn search at max_spawn_y + 128 ensures 128 nodes of open
// space above spawn position. Avoids spawning in possibly sealed voids.
for (s16 y = max_spawn_y + 128; y >= water_level; y--) {
float n_ground = NoisePerlin3D(&noise_ground->np, p.X, y, p.Y, seed);
if (n_ground * f > y - h) { // If solid
if (y < water_level || y > max_spawn_y)
return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
// y + 2 because y is surface and due to biome 'dust' nodes.
return y + 2;
}
}
// Unsuitable spawn position, no ground found
return MAX_MAP_GENERATION_LIMIT;
}
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;
}
int LuaPerlinNoise::l_get3d(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
LuaPerlinNoise *o = checkobject(L, 1);
v3f p = check_v3f(L, 2);
lua_Number val = NoisePerlin3D(&o->np, p.X, p.Y, p.Z, 0);
lua_pushnumber(L, val);
return 1;
}
void TestNoise::testNoise3dPoint()
{
NoiseParams np_normal(20, 40, v3f(50, 50, 50), 9, 5, 0.6, 2.0);
u32 i = 0;
for (u32 z = 0; z != 10; z++)
for (u32 y = 0; y != 10; y++)
for (u32 x = 0; x != 10; x++, i++) {
float actual = NoisePerlin3D(&np_normal, x, y, z, 1337);
float expected = expected_3d_results[i];
UASSERT(fabs(actual - expected) <= 0.00001);
}
}
float MapgenCarpathian::terrainLevelAtPoint(s16 x, s16 z)
{
float ground = NoisePerlin2D(&noise_base->np, x, z, seed);
float height1 = NoisePerlin2D(&noise_height1->np, x, z, seed);
float height2 = NoisePerlin2D(&noise_height2->np, x, z, seed);
float height3 = NoisePerlin2D(&noise_height3->np, x, z, seed);
float height4 = NoisePerlin2D(&noise_height4->np, x, z, seed);
float hter = NoisePerlin2D(&noise_hills_terrain->np, x, z, seed);
float rter = NoisePerlin2D(&noise_ridge_terrain->np, x, z, seed);
float ster = NoisePerlin2D(&noise_step_terrain->np, x, z, seed);
float n_hills = NoisePerlin2D(&noise_hills->np, x, z, seed);
float n_ridge_mnt = NoisePerlin2D(&noise_ridge_mnt->np, x, z, seed);
float n_step_mnt = NoisePerlin2D(&noise_step_mnt->np, x, z, seed);
int height = -MAX_MAP_GENERATION_LIMIT;
for (s16 y = 1; y <= 30; y++) {
float mnt_var = NoisePerlin3D(&noise_mnt_var->np, x, y, z, seed);
// Gradient & shallow seabed
s32 grad = (y < water_level) ? grad_wl + (water_level - y) * 3 : 1 - y;
// Hill/Mountain height (hilliness)
float hill1 = getLerp(height1, height2, mnt_var);
float hill2 = getLerp(height3, height4, mnt_var);
float hill3 = getLerp(height3, height2, mnt_var);
float hill4 = getLerp(height1, height4, mnt_var);
float hilliness = std::fmax(std::fmin(hill1, hill2), std::fmin(hill3, hill4));
// Rolling hills
float hill_mnt = hilliness * pow(n_hills, 2.f);
float hills = pow(hter, 3.f) * hill_mnt;
// Ridged mountains
float ridge_mnt = hilliness * (1.f - fabs(n_ridge_mnt));
float ridged_mountains = pow(rter, 3.f) * ridge_mnt;
// Step (terraced) mountains
float step_mnt = hilliness * getSteps(n_step_mnt);
float step_mountains = pow(ster, 3.f) * step_mnt;
// Final terrain level
float mountains = hills + ridged_mountains + step_mountains;
float surface_level = ground + mountains + grad;
if (y > surface_level && height < 0)
height = y;
}
return height;
}
// This avoids duplicating the code in terrainLevelFromNoise, adding
// only the final step of terrain generation without a noise map.
float MapgenValleys::adjustedTerrainLevelFromNoise(TerrainNoise *tn)
{
float mount = terrainLevelFromNoise(tn);
s16 y_start = myround(mount);
for (s16 y = y_start; y <= y_start + 1000; y++) {
float fill = NoisePerlin3D(&noise_inter_valley_fill->np, tn->x, y, tn->z, seed);
if (fill * *tn->slope <= y - mount) {
mount = MYMAX(y - 1, mount);
break;
}
}
return mount;
}
void OreScatter::generate(MMVManip *vm, int mapseed, u32 blockseed,
v3s16 nmin, v3s16 nmax, u8 *biomemap)
{
PcgRandom pr(blockseed);
MapNode n_ore(c_ore, 0, ore_param2);
u32 sizex = (nmax.X - nmin.X + 1);
u32 volume = (nmax.X - nmin.X + 1) *
(nmax.Y - nmin.Y + 1) *
(nmax.Z - nmin.Z + 1);
u32 csize = clust_size;
u32 cvolume = csize * csize * csize;
u32 nclusters = volume / clust_scarcity;
if (clust_scarcity > volume && 1 >= pr.range(0, clust_scarcity/volume))
nclusters = 1;
for (u32 i = 0; i != nclusters; i++) {
int x0 = pr.range(nmin.X, nmax.X - csize + 1);
int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
if ((flags & OREFLAG_USE_NOISE) &&
(NoisePerlin3D(&np, x0, y0, z0, mapseed) < nthresh))
continue;
if (biomemap && !biomes.empty()) {
u32 index = sizex * (z0 - nmin.Z) + (x0 - nmin.X);
std::set<u8>::iterator it = biomes.find(biomemap[index]);
if (it == biomes.end())
continue;
}
for (u32 z1 = 0; z1 != csize; z1++)
for (u32 y1 = 0; y1 != csize; y1++)
for (u32 x1 = 0; x1 != csize; x1++) {
if (pr.range(1, cvolume) > clust_num_ores)
continue;
u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
continue;
vm->m_data[i] = n_ore;
}
}
}
// This avoids duplicating the code in terrainLevelFromNoise, adding
// only the final step of terrain generation without a noise map.
float MapgenValleys::adjustedTerrainLevelFromNoise(TerrainNoise *tn)
{
float mount = terrainLevelFromNoise(tn);
if (!fast_terrain) {
for (s16 y = round(mount); y <= round(mount) + 1000; y++) {
float fill = NoisePerlin3D(&noise_inter_valley_fill->np, tn->x, y, tn->z, seed);
if (fill * *tn->slope <= y - mount) {
mount = fmax(y - 1, mount);
break;
}
}
}
return mount;
}
int MapgenV7::getGroundLevelAtPoint(v2s16 p) {
s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Y);
float heat = NoisePerlin2D(bmgr->np_heat, p.X, p.Y, seed);
float humidity = NoisePerlin2D(bmgr->np_humidity, p.X, p.Y, seed);
Biome *b = bmgr->getBiome(heat, humidity, groundlevel);
s16 y = groundlevel;
if (y > water_level) {
int iters = 1024; // don't even bother iterating more than 1024 times..
while (iters--) {
float ridgenoise = NoisePerlin3D(noise_ridge->np, p.X, y, p.Y, seed);
if (ridgenoise * (float)(y * y) < 15.0)
break;
y--;
}
}
return y + b->top_depth;
}
void OreScatter::generate(MMVManip *vm, int mapseed, u32 blockseed,
v3s16 nmin, v3s16 nmax)
{
PseudoRandom pr(blockseed);
MapNode n_ore(c_ore, 0, ore_param2);
int volume = (nmax.X - nmin.X + 1) *
(nmax.Y - nmin.Y + 1) *
(nmax.Z - nmin.Z + 1);
int csize = clust_size;
int orechance = (csize * csize * csize) / clust_num_ores;
int nclusters = volume / clust_scarcity;
for (int i = 0; i != nclusters; i++) {
int x0 = pr.range(nmin.X, nmax.X - csize + 1);
int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
if ((flags & OREFLAG_USE_NOISE) &&
(NoisePerlin3D(&np, x0, y0, z0, mapseed) < nthresh))
continue;
for (int z1 = 0; z1 != csize; z1++)
for (int y1 = 0; y1 != csize; y1++)
for (int x1 = 0; x1 != csize; x1++) {
if (pr.range(1, orechance) != 1)
continue;
u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
continue;
vm->m_data[i] = n_ore;
}
}
}
void CaveFractal::carveRoute(v3f vec, float f, bool randomize_xz)
{
MapNode airnode(CONTENT_AIR);
MapNode waternode(c_water_source);
MapNode lavanode(c_lava_source);
v3s16 startp(orp.X, orp.Y, orp.Z);
startp += of;
float nval = NoisePerlin3D(np_caveliquids, startp.X,
startp.Y, startp.Z, mg->seed);
MapNode liquidnode = (nval < 0.40 && node_max.Y < MGFRACTAL_LAVA_DEPTH) ?
lavanode : waternode;
v3f fp = orp + vec * f;
fp.X += 0.1 * ps->range(-10, 10);
fp.Z += 0.1 * ps->range(-10, 10);
v3s16 cp(fp.X, fp.Y, fp.Z);
s16 d0 = -rs/2;
s16 d1 = d0 + rs;
if (randomize_xz) {
d0 += ps->range(-1, 1);
d1 += ps->range(-1, 1);
}
for (s16 z0 = d0; z0 <= d1; z0++) {
s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
s16 maxabsxz = MYMAX(abs(x0), abs(z0));
s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
for (s16 y0 = -si2; y0 <= si2; y0++) {
if (large_cave_is_flat) {
// Make large caves not so tall
if (rs > 7 && abs(y0) >= rs / 3)
continue;
}
v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
p += of;
if (vm->m_area.contains(p) == false)
continue;
u32 i = vm->m_area.index(p);
content_t c = vm->m_data[i].getContent();
if (!ndef->get(c).is_ground_content)
continue;
int full_ymin = node_min.Y - MAP_BLOCKSIZE;
int full_ymax = node_max.Y + MAP_BLOCKSIZE;
if (flooded && full_ymin < water_level &&
full_ymax > water_level)
vm->m_data[i] = (p.Y <= water_level) ?
waternode : airnode;
else if (flooded && full_ymax < water_level)
vm->m_data[i] = (p.Y < startp.Y - 4) ?
liquidnode : airnode;
else
vm->m_data[i] = airnode;
}
}
}
}
void CaveV5::carveRoute(v3f vec, float f, bool randomize_xz)
{
MapNode airnode(CONTENT_AIR);
MapNode waternode(c_water_source);
MapNode lavanode(c_lava_source);
MapNode n_ice(c_ice);
v3s16 startp(orp.X, orp.Y, orp.Z);
startp += of;
float nval = NoisePerlin3D(np_caveliquids, startp.X,
startp.Y, startp.Z, mg->seed);
//MapNode liquidnode = nval < 0.40 ? lavanode : waternode;
v3f fp = orp + vec * f;
fp.X += 0.1 * ps->range(-10, 10);
fp.Z += 0.1 * ps->range(-10, 10);
v3s16 cp(fp.X, fp.Y, fp.Z);
s16 d0 = -rs/2;
s16 d1 = d0 + rs;
if (randomize_xz) {
d0 += ps->range(-1, 1);
d1 += ps->range(-1, 1);
}
for (s16 z0 = d0; z0 <= d1; z0++) {
s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
s16 maxabsxz = MYMAX(abs(x0), abs(z0));
s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
for (s16 y0 = -si2; y0 <= si2; y0++) {
if (large_cave_is_flat) {
// Make large caves not so tall
if (rs > 7 && abs(y0) >= rs / 3)
continue;
}
v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
p += of;
if (vm->m_area.contains(p) == false)
continue;
u32 i = vm->m_area.index(p);
content_t c = vm->m_data[i].getContent();
if (!ndef->get(c).is_ground_content)
continue;
s16 heat = mg->m_emerge->env->m_use_weather ? mg->m_emerge->env->getServerMap().updateBlockHeat(mg->m_emerge->env, p, nullptr, &mg->heat_cache) : 0;
MapNode n_water_or_ice = (heat < 0 && (p.Y > water_level + heat/4 || p.Y > startp.Y - 2 + heat/4)) ? n_ice : waternode;
MapNode liquidnode = nval < 0.40 ? lavanode : n_water_or_ice;
int full_ymin = node_min.Y - MAP_BLOCKSIZE;
int full_ymax = node_max.Y + MAP_BLOCKSIZE;
if (flooded && full_ymin < water_level &&
full_ymax > water_level)
vm->m_data[i] = (p.Y <= water_level) ?
n_water_or_ice : airnode;
else if (flooded && full_ymax < water_level)
vm->m_data[i] = (p.Y < startp.Y - 4) ?
liquidnode : airnode;
else
vm->m_data[i] = airnode;
}
}
}
}
bool MapgenV7::getMountainTerrainAtPoint(int x, int y, int z)
{
float mnt_h_n = NoisePerlin2D(&noise_mount_height->np, x, z, seed);
float mnt_n = NoisePerlin3D(&noise_mountain->np, x, y, z, seed);
return mnt_n * mnt_h_n >= (float)y;
}
void CaveV7::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) {
MapNode airnode(CONTENT_AIR);
MapNode waternode(c_water_source);
MapNode lavanode(c_lava_source);
v3s16 startp(orp.X, orp.Y, orp.Z);
startp += of;
float nval = NoisePerlin3D(np_caveliquids, startp.X,
startp.Y, startp.Z, mg->seed);
MapNode liquidnode = (nval < 0.40 && node_max.Y < -256) ? lavanode : waternode;
v3f fp = orp + vec * f;
fp.X += 0.1 * ps->range(-10, 10);
fp.Z += 0.1 * ps->range(-10, 10);
v3s16 cp(fp.X, fp.Y, fp.Z);
s16 d0 = -rs/2;
s16 d1 = d0 + rs;
if (randomize_xz) {
d0 += ps->range(-1, 1);
d1 += ps->range(-1, 1);
}
bool should_make_cave_hole = ps->range(1, 10) == 1;
for (s16 z0 = d0; z0 <= d1; z0++) {
s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1);
for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) {
s16 maxabsxz = MYMAX(abs(x0), abs(z0));
s16 si2 = is_ravine ? MYMIN(ps->range(25, 26), ar.Y) :
rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1);
for (s16 y0 = -si2; y0 <= si2; y0++) {
if (large_cave_is_flat) {
// Make large caves not so tall
if (rs > 7 && abs(y0) >= rs / 3)
continue;
}
v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
p += of;
if (!is_ravine && mg->heightmap && should_make_cave_hole &&
p.X <= node_max.X && p.Z <= node_max.Z) {
int maplen = node_max.X - node_min.X + 1;
int idx = (p.Z - node_min.Z) * maplen + (p.X - node_min.X);
if (p.Y >= mg->heightmap[idx] - 2)
continue;
}
if (vm->m_area.contains(p) == false)
continue;
u32 i = vm->m_area.index(p);
content_t c = vm->m_data[i].getContent();
if (!ndef->get(c).is_ground_content)
continue;
int full_ymin = node_min.Y - MAP_BLOCKSIZE;
int full_ymax = node_max.Y + MAP_BLOCKSIZE;
if (flooded && full_ymin < water_level && full_ymax > water_level)
vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode;
else if (flooded && full_ymax < water_level)
vm->m_data[i] = (p.Y < startp.Y - 4) ? liquidnode : airnode;
else
vm->m_data[i] = airnode;
}
}
}
}