#include "content_sao.h"
#include "nodedef.h"
#include "voxelalgorithms.h"
-#include "profiler.h" // For TimeTaker
+//#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"
FlagDesc flagdesc_mapgen_fractal[] = {
- {"julia", MGFRACTAL_JULIA},
{NULL, 0}
};
///////////////////////////////////////////////////////////////////////////////////////
-MapgenFractal::MapgenFractal(int mapgenid, MapgenParams *params, EmergeManager *emerge)
- : Mapgen(mapgenid, params, emerge)
+MapgenFractal::MapgenFractal(int mapgenid, MapgenFractalParams *params, EmergeManager *emerge)
+ : MapgenBasic(mapgenid, params, emerge)
{
- this->m_emerge = emerge;
- this->bmgr = emerge->biomemgr;
+ this->spflags = params->spflags;
+ this->cave_width = params->cave_width;
+ this->fractal = params->fractal;
+ this->iterations = params->iterations;
+ this->scale = params->scale;
+ this->offset = params->offset;
+ this->slice_w = params->slice_w;
+ this->julia_x = params->julia_x;
+ this->julia_y = params->julia_y;
+ this->julia_z = params->julia_z;
+ this->julia_w = params->julia_w;
- //// 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;
-
- MapgenFractalParams *sp = (MapgenFractalParams *)params->sparams;
- this->spflags = sp->spflags;
-
- this->formula = sp->formula;
- this->iterations = sp->iterations;
- this->scale = sp->scale;
- this->offset = sp->offset;
- this->slice_w = sp->slice_w;
+ //// 2D terrain noise
+ noise_seabed = new Noise(¶ms->np_seabed, seed, csize.X, csize.Z);
+ noise_filler_depth = new Noise(¶ms->np_filler_depth, seed, csize.X, csize.Z);
- this->julia_x = sp->julia_x;
- this->julia_y = sp->julia_y;
- this->julia_z = sp->julia_z;
- this->julia_w = sp->julia_w;
+ MapgenBasic::np_cave1 = params->np_cave1;
+ MapgenBasic::np_cave2 = params->np_cave2;
- //// 2D terrain noise
- noise_seabed = new Noise(&sp->np_seabed, seed, csize.X, csize.Z);
- noise_filler_depth = new Noise(&sp->np_filler_depth, seed, csize.X, csize.Z);
-
- //// 3D terrain 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(¶ms->np_biome_heat, seed, csize.X, csize.Z);
- noise_humidity = new Noise(¶ms->np_biome_humidity, seed, csize.X, csize.Z);
- noise_heat_blend = new Noise(¶ms->np_biome_heat_blend, seed, csize.X, csize.Z);
- noise_humidity_blend = new Noise(¶ms->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;
+ this->formula = fractal / 2 + fractal % 2;
+ this->julia = fractal % 2 == 0;
}
{
delete noise_seabed;
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;
}
MapgenFractalParams::MapgenFractalParams()
{
- spflags = 0;
-
- formula = 1;
- iterations = 9;
- scale = v3f(1024.0, 256.0, 1024.0);
- offset = v3f(1.75, 0.0, 0.0);
- slice_w = 0.0;
-
- julia_x = 0.33;
- julia_y = 0.33;
- julia_z = 0.33;
- julia_w = 0.33;
+ spflags = 0;
+ cave_width = 0.09;
+ fractal = 1;
+ iterations = 11;
+ scale = v3f(4096.0, 1024.0, 4096.0);
+ offset = v3f(1.79, 0.0, 0.0);
+ slice_w = 0.0;
+ julia_x = 0.33;
+ julia_y = 0.33;
+ julia_z = 0.33;
+ julia_w = 0.33;
np_seabed = NoiseParams(-14, 9, v3f(600, 600, 600), 41900, 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);
+ 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 MapgenFractalParams::readParams(const Settings *settings)
{
- settings->getFlagStrNoEx("mgfractal_spflags", spflags, flagdesc_mapgen_fractal);
-
- settings->getU16NoEx("mgfractal_formula", formula);
- settings->getU16NoEx("mgfractal_iterations", iterations);
- settings->getV3FNoEx("mgfractal_scale", scale);
- settings->getV3FNoEx("mgfractal_offset", offset);
- settings->getFloatNoEx("mgfractal_slice_w", slice_w);
-
- settings->getFloatNoEx("mgfractal_julia_x", julia_x);
- settings->getFloatNoEx("mgfractal_julia_y", julia_y);
- settings->getFloatNoEx("mgfractal_julia_z", julia_z);
- settings->getFloatNoEx("mgfractal_julia_w", julia_w);
-
- settings->getNoiseParams("mgfractal_np_seabed", np_seabed);
+ settings->getFlagStrNoEx("mgfractal_spflags", spflags, flagdesc_mapgen_fractal);
+ settings->getFloatNoEx("mgfractal_cave_width", cave_width);
+ settings->getU16NoEx("mgfractal_fractal", fractal);
+ settings->getU16NoEx("mgfractal_iterations", iterations);
+ settings->getV3FNoEx("mgfractal_scale", scale);
+ settings->getV3FNoEx("mgfractal_offset", offset);
+ settings->getFloatNoEx("mgfractal_slice_w", slice_w);
+ settings->getFloatNoEx("mgfractal_julia_x", julia_x);
+ settings->getFloatNoEx("mgfractal_julia_y", julia_y);
+ settings->getFloatNoEx("mgfractal_julia_z", julia_z);
+ settings->getFloatNoEx("mgfractal_julia_w", julia_w);
+
+ settings->getNoiseParams("mgfractal_np_seabed", np_seabed);
settings->getNoiseParams("mgfractal_np_filler_depth", np_filler_depth);
- settings->getNoiseParams("mgfractal_np_cave1", np_cave1);
- settings->getNoiseParams("mgfractal_np_cave2", np_cave2);
+ settings->getNoiseParams("mgfractal_np_cave1", np_cave1);
+ settings->getNoiseParams("mgfractal_np_cave2", np_cave2);
}
void MapgenFractalParams::writeParams(Settings *settings) const
{
- settings->setFlagStr("mgfractal_spflags", spflags, flagdesc_mapgen_fractal, U32_MAX);
-
- settings->setU16("mgfractal_formula", formula);
- settings->setU16("mgfractal_iterations", iterations);
- settings->setV3F("mgfractal_scale", scale);
- settings->setV3F("mgfractal_offset", offset);
- settings->setFloat("mgfractal_slice_w", slice_w);
-
- settings->setFloat("mgfractal_julia_x", julia_x);
- settings->setFloat("mgfractal_julia_y", julia_y);
- settings->setFloat("mgfractal_julia_z", julia_z);
- settings->setFloat("mgfractal_julia_w", julia_w);
-
- settings->setNoiseParams("mgfractal_np_seabed", np_seabed);
+ settings->setFlagStr("mgfractal_spflags", spflags, flagdesc_mapgen_fractal, U32_MAX);
+ settings->setFloat("mgfractal_cave_width", cave_width);
+ settings->setU16("mgfractal_fractal", fractal);
+ settings->setU16("mgfractal_iterations", iterations);
+ settings->setV3F("mgfractal_scale", scale);
+ settings->setV3F("mgfractal_offset", offset);
+ settings->setFloat("mgfractal_slice_w", slice_w);
+ settings->setFloat("mgfractal_julia_x", julia_x);
+ settings->setFloat("mgfractal_julia_y", julia_y);
+ settings->setFloat("mgfractal_julia_z", julia_z);
+ settings->setFloat("mgfractal_julia_w", julia_w);
+
+ settings->setNoiseParams("mgfractal_np_seabed", np_seabed);
settings->setNoiseParams("mgfractal_np_filler_depth", np_filler_depth);
- settings->setNoiseParams("mgfractal_np_cave1", np_cave1);
- settings->setNoiseParams("mgfractal_np_cave2", np_cave2);
+ settings->setNoiseParams("mgfractal_np_cave1", np_cave1);
+ settings->setNoiseParams("mgfractal_np_cave2", np_cave2);
}
/////////////////////////////////////////////////////////////////
-int MapgenFractal::getGroundLevelAtPoint(v2s16 p)
+int MapgenFractal::getSpawnLevelAtPoint(v2s16 p)
{
- s16 search_start = 128;
- s16 search_end = -128;
-
- for (s16 y = search_start; y >= search_end; y--) {
- if (getFractalAtPoint(p.X, y, p.Y))
- return y;
+ bool solid_below = false; // Dry solid node is present below to spawn on
+ u8 air_count = 0; // Consecutive air nodes above the dry solid node
+ s16 seabed_level = NoisePerlin2D(&noise_seabed->np, p.X, p.Y, seed);
+ // Seabed can rise above water_level or might be raised to create dry land
+ s16 search_start = MYMAX(seabed_level, water_level + 1);
+ if (seabed_level > water_level)
+ solid_below = true;
+
+ for (s16 y = search_start; y <= search_start + 128; y++) {
+ if (getFractalAtPoint(p.X, y, p.Y)) { // Fractal node
+ solid_below = true;
+ air_count = 0;
+ } else if (solid_below) { // Air above solid node
+ air_count++;
+ if (air_count == 2)
+ return y - 2;
+ }
}
- return -MAX_MAP_GENERATION_LIMIT;
+ return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
}
this->generating = true;
this->vm = data->vmanip;
this->ndef = data->nodedef;
- TimeTaker t("makeChunk");
+ //TimeTaker t("makeChunk");
v3s16 blockpos_min = data->blockpos_min;
v3s16 blockpos_max = data->blockpos_max;
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);
+ // Init biome generator, place biome-specific nodes, and build biomemap
+ biomegen->calcBiomeNoise(node_min);
+ MgStoneType stone_type = generateBiomes();
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;
- }
+ generateCaves(stone_surface_max_y, MGFRACTAL_LARGE_CAVE_DEPTH);
- DungeonGen dgen(this, &dp);
- dgen.generate(blockseed, full_node_min, full_node_max);
- }
+ if (flags & MG_DUNGEONS)
+ generateDungeons(stone_surface_max_y, stone_type);
// Generate the registered decorations
if (flags & MG_DECORATIONS)
// Sprinkle some dust on top after everything else was generated
dustTopNodes();
- printf("makeChunk: %dms\n", t.stop());
+ //printf("makeChunk: %dms\n", t.stop());
updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
}
-void MapgenFractal::calculateNoise()
-{
- //TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
- int x = node_min.X;
- int y = node_min.Y - 1;
- int z = node_min.Z;
-
- noise_seabed->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());
-}
-
-
bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
{
float cx, cy, cz, cw, ox, oy, oz, ow;
- if (spflags & MGFRACTAL_JULIA) { // Julia set
+ if (julia) { // Julia set
cx = julia_x;
cy = julia_y;
cz = julia_z;
ow = 0.0f;
}
+ float nx = 0.0f;
+ float ny = 0.0f;
+ float nz = 0.0f;
+ float nw = 0.0f;
+
for (u16 iter = 0; iter < iterations; iter++) {
- float nx = 0.0f;
- float ny = 0.0f;
- float nz = 0.0f;
- float nw = 0.0f;
- if (formula == 1) { // 4D "Roundy" Mandelbrot Set
+ if (formula == 1) { // 4D "Roundy"
nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
ny = 2.0f * (ox * oy + oz * ow) + cy;
nz = 2.0f * (ox * oz + oy * ow) + cz;
nw = 2.0f * (ox * ow + oy * oz) + cw;
- } else if (formula == 2) { // 4D "Squarry" Mandelbrot Set
+ } else if (formula == 2) { // 4D "Squarry"
nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
ny = 2.0f * (ox * oy + oz * ow) + cy;
nz = 2.0f * (ox * oz + oy * ow) + cz;
nw = 2.0f * (ox * ow - oy * oz) + cw;
- } else if (formula == 3) { // 4D "Mandy Cousin" Mandelbrot Set
+ } else if (formula == 3) { // 4D "Mandy Cousin"
nx = ox * ox - oy * oy - oz * oz + ow * ow + cx;
ny = 2.0f * (ox * oy + oz * ow) + cy;
nz = 2.0f * (ox * oz + oy * ow) + cz;
nw = 2.0f * (ox * ow + oy * oz) + cw;
- } else if (formula == 4) { // 4D Mandelbrot Set Variation
+ } else if (formula == 4) { // 4D "Variation"
nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
ny = 2.0f * (ox * oy + oz * ow) + cy;
nz = 2.0f * (ox * oz - oy * ow) + cz;
nw = 2.0f * (ox * ow + oy * oz) + cw;
+ } else if (formula == 5) { // 3D "Mandelbrot/Mandelbar"
+ nx = ox * ox - oy * oy - oz * oz + cx;
+ ny = 2.0f * ox * oy + cy;
+ nz = -2.0f * ox * oz + cz;
+ } else if (formula == 6) { // 3D "Christmas Tree"
+ // Altering the formula here is necessary to avoid division by zero
+ if (fabs(oz) < 0.000000001f) {
+ nx = ox * ox - oy * oy - oz * oz + cx;
+ ny = 2.0f * oy * ox + cy;
+ nz = 4.0f * oz * ox + cz;
+ } else {
+ float a = (2.0f * ox) / (sqrt(oy * oy + oz * oz));
+ nx = ox * ox - oy * oy - oz * oz + cx;
+ ny = a * (oy * oy - oz * oz) + cy;
+ nz = a * 2.0f * oy * oz + cz;
+ }
+ } else if (formula == 7) { // 3D "Mandelbulb"
+ if (fabs(oy) < 0.000000001f) {
+ nx = ox * ox - oz * oz + cx;
+ ny = cy;
+ nz = -2.0f * oz * sqrt(ox * ox) + cz;
+ } else {
+ float a = 1.0f - (oz * oz) / (ox * ox + oy * oy);
+ nx = (ox * ox - oy * oy) * a + cx;
+ ny = 2.0f * ox * oy * a + cy;
+ nz = -2.0f * oz * sqrt(ox * ox + oy * oy) + cz;
+ }
+ } else if (formula == 8) { // 3D "Cosine Mandelbulb"
+ if (fabs(oy) < 0.000000001f) {
+ nx = 2.0f * ox * oz + cx;
+ ny = 4.0f * oy * oz + cy;
+ nz = oz * oz - ox * ox - oy * oy + cz;
+ } else {
+ float a = (2.0f * oz) / sqrt(ox * ox + oy * oy);
+ nx = (ox * ox - oy * oy) * a + cx;
+ ny = 2.0f * ox * oy * a + cy;
+ nz = oz * oz - ox * ox - oy * oy + cz;
+ }
+ } else if (formula == 9) { // 4D "Mandelbulb"
+ float rxy = sqrt(ox * ox + oy * oy);
+ float rxyz = sqrt(ox * ox + oy * oy + oz * oz);
+ if (fabs(ow) < 0.000000001f && fabs(oz) < 0.000000001f) {
+ nx = (ox * ox - oy * oy) + cx;
+ ny = 2.0f * ox * oy + cy;
+ nz = -2.0f * rxy * oz + cz;
+ nw = 2.0f * rxyz * ow + cw;
+ } else {
+ float a = 1.0f - (ow * ow) / (rxyz * rxyz);
+ float b = a * (1.0f - (oz * oz) / (rxy * rxy));
+ nx = (ox * ox - oy * oy) * b + cx;
+ ny = 2.0f * ox * oy * b + cy;
+ nz = -2.0f * rxy * oz * a + cz;
+ nw = 2.0f * rxyz * ow + cw;
+ }
}
if (nx * nx + ny * ny + nz * nz + nw * nw > 4.0f)
s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
u32 index2d = 0;
+ noise_seabed->perlinMap2D(node_min.X, node_min.Z);
+
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);
return stone_surface_max_y;
}
-
-
-MgStoneType MapgenFractal::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 MapgenFractal::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 MapgenFractal::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 > MGFRACTAL_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);
- }
-}
projects / minetest.git / blobdiff