/*
Minetest
-Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
+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
#include "content_sao.h"
#include "nodedef.h"
#include "voxelalgorithms.h"
-#include "profiler.h"
+//#include "profiler.h" // For TimeTaker
#include "settings.h" // For g_settings
#include "emerge.h"
#include "dungeongen.h"
{NULL, 0}
};
+
///////////////////////////////////////////////////////////////////////////////
//// 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);
+ // 1-down overgeneration
+ this->zstride_1d = csize.X * (csize.Y + 1);
- this->biomemap = new u8[csize.X * csize.Z];
- this->heightmap = new s16[csize.X * csize.Z];
+ this->biomemap = new u8[csize.X * csize.Z];
+ this->heightmap = new s16[csize.X * csize.Z];
+ this->heatmap = NULL;
+ this->humidmap = NULL;
this->ridge_heightmap = new s16[csize.X * csize.Z];
MapgenV7Params *sp = (MapgenV7Params *)params->sparams;
noise_ridge_uwater = new Noise(&sp->np_ridge_uwater, seed, csize.X, csize.Z);
//// 3d terrain noise
+ // 1-up 1-down overgeneration
noise_mountain = new Noise(&sp->np_mountain, seed, csize.X, csize.Y + 2, csize.Z);
noise_ridge = new Noise(&sp->np_ridge, seed, csize.X, csize.Y + 2, csize.Z);
- 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);
+ // 1-down overgeneraion
+ noise_cave1 = new Noise(&sp->np_cave1, seed, csize.X, csize.Y + 1, csize.Z);
+ noise_cave2 = new Noise(&sp->np_cave2, seed, csize.X, csize.Y + 1, 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 = 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_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");
if (c_stair_cobble == CONTENT_IGNORE)
c_stair_cobble = c_cobble;
if (c_sandstonebrick == CONTENT_IGNORE)
- c_sandstonebrick = c_desert_stone;
+ c_sandstonebrick = c_sandstone;
if (c_stair_sandstonebrick == CONTENT_IGNORE)
- c_stair_sandstonebrick = c_sandstonebrick;
+ c_stair_sandstonebrick = c_sandstone;
}
delete noise_heat;
delete noise_humidity;
+ delete noise_heat_blend;
+ delete noise_humidity_blend;
delete[] ridge_heightmap;
delete[] heightmap;
{
spflags = MGV7_MOUNTAINS | MGV7_RIDGES;
- np_terrain_base = NoiseParams(4, 70, v3f(300, 300, 300), 82341, 6, 0.7, 2.0);
- np_terrain_alt = NoiseParams(4, 25, v3f(600, 600, 600), 5934, 5, 0.6, 2.0);
- np_terrain_persist = NoiseParams(0.6, 0.1, v3f(500, 500, 500), 539, 3, 0.6, 2.0);
- np_height_select = NoiseParams(-0.5, 1, v3f(250, 250, 250), 4213, 5, 0.69, 2.0);
- np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261, 4, 0.7, 2.0);
- np_mount_height = NoiseParams(100, 30, v3f(500, 500, 500), 72449, 4, 0.6, 2.0);
- np_ridge_uwater = NoiseParams(0, 1, v3f(500, 500, 500), 85039, 4, 0.6, 2.0);
- np_mountain = NoiseParams(-0.6, 1, v3f(250, 350, 250), 5333, 5, 0.68, 2.0);
- np_ridge = NoiseParams(0, 1, v3f(100, 100, 100), 6467, 4, 0.75, 2.0);
- np_cave1 = NoiseParams(0, 12, v3f(100, 100, 100), 52534, 4, 0.5, 2.0);
- np_cave2 = NoiseParams(0, 12, v3f(100, 100, 100), 10325, 4, 0.5, 2.0);
+ np_terrain_base = NoiseParams(4, 70, v3f(600, 600, 600), 82341, 5, 0.6, 2.0);
+ np_terrain_alt = NoiseParams(4, 25, v3f(600, 600, 600), 5934, 5, 0.6, 2.0);
+ np_terrain_persist = NoiseParams(0.6, 0.1, v3f(2000, 2000, 2000), 539, 3, 0.6, 2.0);
+ np_height_select = NoiseParams(-8, 16, v3f(500, 500, 500), 4213, 6, 0.7, 2.0);
+ np_filler_depth = NoiseParams(0, 1.2, v3f(150, 150, 150), 261, 3, 0.7, 2.0);
+ np_mount_height = NoiseParams(256, 112, v3f(1000, 1000, 1000), 72449, 3, 0.6, 2.0);
+ np_ridge_uwater = NoiseParams(0, 1, v3f(1000, 1000, 1000), 85039, 5, 0.6, 2.0);
+ np_mountain = NoiseParams(-0.6, 1, v3f(250, 350, 250), 5333, 5, 0.63, 2.0);
+ np_ridge = NoiseParams(0, 1, v3f(100, 100, 100), 6467, 4, 0.75, 2.0);
+ np_cave1 = NoiseParams(0, 12, v3f(96, 96, 96), 52534, 4, 0.5, 2.0);
+ np_cave2 = NoiseParams(0, 12, v3f(96, 96, 96), 10325, 4, 0.5, 2.0);
}
void MapgenV7Params::writeParams(Settings *settings) const
{
- settings->setFlagStr("mgv7_spflags", spflags, flagdesc_mapgen_v7, (u32)-1);
+ settings->setFlagStr("mgv7_spflags", spflags, flagdesc_mapgen_v7, U32_MAX);
settings->setNoiseParams("mgv7_np_terrain_base", np_terrain_base);
settings->setNoiseParams("mgv7_np_terrain_alt", np_terrain_alt);
}
-///////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////
-int MapgenV7::getGroundLevelAtPoint(v2s16 p)
+int MapgenV7::getSpawnLevelAtPoint(v2s16 p)
{
// Base terrain calculation
s16 y = baseTerrainLevelAtPoint(p.X, p.Y);
// Ridge/river terrain calculation
float width = 0.2;
float uwatern = NoisePerlin2D(&noise_ridge_uwater->np, p.X, p.Y, seed) * 2;
- // actually computing the depth of the ridge is much more expensive;
- // if inside a river, simply guess
+ // if inside a river this is an unsuitable spawn point
if (fabs(uwatern) <= width)
- return water_level - 10;
+ return MAX_MAP_GENERATION_LIMIT;
// Mountain terrain calculation
- int iters = 128; // don't even bother iterating more than 128 times..
+ int iters = 128;
while (iters--) {
- //current point would have been air
- if (!getMountainTerrainAtPoint(p.X, y, p.Y))
- return y;
-
+ if (!getMountainTerrainAtPoint(p.X, y + 1, p.Y)) { // Air, y is ground level
+ if (y <= water_level || y > water_level + 16)
+ return MAX_MAP_GENERATION_LIMIT; // Unsuitable spawn point
+ else
+ return y;
+ }
y++;
}
- return y;
+ // Unsuitable spawn point, no ground surface found
+ return MAX_MAP_GENERATION_LIMIT;
}
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);
+ 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);
+ data->blockpos_requested.Y <= data->blockpos_max.Y &&
+ data->blockpos_requested.Z <= data->blockpos_max.Z);
this->generating = true;
this->vm = data->vmanip;
noise_humidity->result, heightmap, biomemap);
// Actually place the biome-specific nodes
- bool desert_stone = generateBiomes(noise_heat->result, noise_humidity->result);
+ MgStoneType stone_type = generateBiomes(noise_heat->result, noise_humidity->result);
if (flags & MG_CAVES)
generateCaves(stone_surface_max_y);
dp.np_density = nparams_dungeon_density;
dp.np_wetness = nparams_dungeon_wetness;
dp.c_water = c_water_source;
- if (desert_stone) {
+ 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.holesize = v3s16(2, 3, 2);
dp.roomsize = v3s16(2, 5, 2);
dp.notifytype = GENNOTIFY_TEMPLE;
- } else {
- dp.c_cobble = c_cobble;
- dp.c_moss = c_mossycobble;
- dp.c_stair = c_stair_cobble;
+ } 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 = 3.0;
- dp.holesize = v3s16(1, 2, 1);
- dp.roomsize = v3s16(0, 0, 0);
+ dp.mossratio = 0.0;
+ dp.holesize = v3s16(2, 2, 2);
+ dp.roomsize = v3s16(2, 0, 2);
dp.notifytype = GENNOTIFY_DUNGEON;
}
}
// Generate the registered decorations
- m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
+ if (flags & MG_DECORATIONS)
+ m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
// Generate the registered ores
m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
void MapgenV7::calculateNoise()
{
//TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
- int x = node_min.X;
- int y = node_min.Y - 1;
- int z = node_min.Z;
+ s16 x = node_min.X;
+ s16 y = node_min.Y - 1;
+ s16 z = node_min.Z;
noise_terrain_persist->perlinMap2D(x, z);
float *persistmap = noise_terrain_persist->result;
noise_terrain_alt->perlinMap2D(x, z, persistmap);
noise_height_select->perlinMap2D(x, z);
- if (flags & MG_CAVES) {
- noise_cave1->perlinMap3D(x, y, z);
- noise_cave2->perlinMap3D(x, y, z);
- }
-
if ((spflags & MGV7_RIDGES) && node_max.Y >= water_level) {
noise_ridge->perlinMap3D(x, y, z);
noise_ridge_uwater->perlinMap2D(x, z);
}
- if ((spflags & MGV7_MOUNTAINS) && node_max.Y >= 0) {
- noise_mountain->perlinMap3D(x, y, z);
- noise_mount_height->perlinMap2D(x, z);
- }
+ // Cave noises are calculated in generateCaves()
+ // only if solid terrain is present in mapchunk
- if (node_max.Y >= water_level) {
- noise_filler_depth->perlinMap2D(x, z);
- noise_heat->perlinMap2D(x, z);
- noise_humidity->perlinMap2D(x, z);
+ // Mountain noises are calculated in generateMountainTerrain()
+ // only if solid terrain surface dips into mapchunk
+
+ noise_filler_depth->perlinMap2D(x, 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());
}
Biome *MapgenV7::getBiomeAtPoint(v3s16 p)
{
- float heat = NoisePerlin2D(&noise_heat->np, p.X, p.Z, seed);
- float humidity = NoisePerlin2D(&noise_humidity->np, p.X, p.Z, seed);
+ float heat = NoisePerlin2D(&noise_heat->np, p.X, p.Z, seed) +
+ NoisePerlin2D(&noise_heat_blend->np, p.X, p.Z, seed);
+ float humidity = NoisePerlin2D(&noise_humidity->np, p.X, p.Z, seed) +
+ NoisePerlin2D(&noise_humidity_blend->np, p.X, p.Z, seed);
s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Z);
return bmgr->getBiome(heat, humidity, groundlevel);
}
//needs to be updated
-float MapgenV7::baseTerrainLevelAtPoint(int x, int z)
+float MapgenV7::baseTerrainLevelAtPoint(s16 x, s16 z)
{
float hselect = NoisePerlin2D(&noise_height_select->np, x, z, seed);
hselect = rangelim(hselect, 0.0, 1.0);
}
-bool MapgenV7::getMountainTerrainAtPoint(int x, int y, int z)
+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 * mnt_h_n >= (float)y;
+
+ return mnt_n + density_gradient >= 0.0;
}
-bool MapgenV7::getMountainTerrainFromMap(int idx_xyz, int idx_xz, int y)
+bool MapgenV7::getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y)
{
float mounthn = noise_mount_height->result[idx_xz];
+ float density_gradient = -((float)y / mounthn);
float mountn = noise_mountain->result[idx_xyz];
- return mountn * mounthn >= (float)y;
-}
-
-
-#if 0
-void MapgenV7::carveRivers() {
- MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
- MapNode n_stone(c_stone);
- u32 index = 0;
-
- int river_depth = 4;
- for (s16 z = node_min.Z; z <= node_max.Z; z++)
- for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
- float terrain_mod = noise_terrain_mod->result[index];
- NoiseParams *np = noise_terrain_river->np;
- np.persist = noise_terrain_persist->result[index];
- float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
- float height = terrain_river * (1 - abs(terrain_mod)) *
- noise_terrain_river->np.scale;
- height = log(height * height); //log(h^3) is pretty interesting for terrain
-
- s16 y = heightmap[index];
- if (height < 1.0 && y > river_depth &&
- y - river_depth >= node_min.Y && y <= node_max.Y) {
-
- for (s16 ry = y; ry != y - river_depth; ry--) {
- u32 vi = vm->m_area.index(x, ry, z);
- vm->m_data[vi] = n_air;
- }
-
- u32 vi = vm->m_area.index(x, y - river_depth, z);
- vm->m_data[vi] = n_water_source;
- }
- }
+ return mountn + density_gradient >= 0.0;
}
-#endif
int MapgenV7::generateTerrain()
{
- int ymax = generateBaseTerrain();
+ s16 stone_surface_min_y;
+ s16 stone_surface_max_y;
+
+ generateBaseTerrain(&stone_surface_min_y, &stone_surface_max_y);
- if (spflags & MGV7_MOUNTAINS)
- ymax = generateMountainTerrain(ymax);
+ if ((spflags & MGV7_MOUNTAINS) && stone_surface_min_y < node_max.Y)
+ stone_surface_max_y = generateMountainTerrain(stone_surface_max_y);
if (spflags & MGV7_RIDGES)
generateRidgeTerrain();
- return ymax;
+ return stone_surface_max_y;
}
-int MapgenV7::generateBaseTerrain()
+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);
- int stone_surface_max_y = -MAP_GENERATION_LIMIT;
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++)
heightmap[index] = surface_y;
ridge_heightmap[index] = surface_y;
- if (surface_y > stone_surface_max_y)
- stone_surface_max_y = 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);
+ 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[i].getContent() == CONTENT_IGNORE) {
+ if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
if (y <= surface_y)
- vm->m_data[i] = n_stone;
+ vm->m_data[vi] = n_stone;
else if (y <= water_level)
- vm->m_data[i] = n_water;
+ vm->m_data[vi] = n_water;
else
- vm->m_data[i] = n_air;
+ vm->m_data[vi] = n_air;
}
- vm->m_area.add_y(em, i, 1);
+ vm->m_area.add_y(em, vi, 1);
}
}
- return stone_surface_max_y;
+ *stone_surface_min_y = surface_min_y;
+ *stone_surface_max_y = surface_max_y;
}
-int MapgenV7::generateMountainTerrain(int ymax)
+int MapgenV7::generateMountainTerrain(s16 ymax)
{
- if (node_max.Y < 0)
- return 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;
MapNode n_water(c_water_source);
MapNode n_air(CONTENT_AIR);
u32 index = 0;
- float width = 0.2; // TODO: figure out acceptable perlin noise values
+ float width = 0.2;
for (s16 z = node_min.Z; z <= node_max.Z; z++)
for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
}
-bool MapgenV7::generateBiomes(float *heat_map, float *humidity_map)
+MgStoneType MapgenV7::generateBiomes(float *heat_map, float *humidity_map)
{
- if (node_max.Y < water_level)
- return false;
-
v3s16 em = vm->m_area.getExtent();
u32 index = 0;
- bool desert_stone = false;
+ 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;
- s16 dfiller = 0;
- s16 y0_top = 0;
- s16 y0_filler = 0;
- s16 depth_water_top = 0;
+ u16 depth_top = 0;
+ u16 base_filler = 0;
+ u16 depth_water_top = 0;
+ u32 vi = vm->m_area.index(x, node_max.Y, z);
- s16 nplaced = 0;
- u32 i = 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;
- content_t c_above = vm->m_data[i + em.X].getContent();
- bool have_air = c_above == CONTENT_AIR;
+ // 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[i].getContent();
+ content_t c = vm->m_data[vi].getContent();
- if (c != CONTENT_IGNORE && c != CONTENT_AIR &&
- (y == node_max.Y || have_air)) {
+ // 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);
- dfiller = biome->depth_filler + noise_filler_depth->result[index];
- y0_top = biome->depth_top;
- y0_filler = biome->depth_top + dfiller;
+ 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)
- desert_stone = true;
+ stone_type = DESERT_STONE;
+ else if (biome->c_stone == c_sandstone)
+ stone_type = SANDSTONE;
}
- if (c == c_stone && have_air) {
- content_t c_below = vm->m_data[i - em.X].getContent();
-
- if (c_below != CONTENT_AIR && c_below != c_water_source) {
- if (nplaced < y0_top) {
- vm->m_data[i] = MapNode(biome->c_top);
- nplaced++;
- } else if (nplaced < y0_filler && nplaced >= y0_top) {
- 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);
+ 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);
}
- } else if (c == c_stone) {
- have_air = false;
- nplaced = 0;
- vm->m_data[i] = MapNode(biome->c_stone);
+
+ air_above = false;
+ water_above = false;
} 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);
+ 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) {
- have_air = true;
- nplaced = 0;
+ 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, i, -1);
+ vm->m_area.add_y(em, vi, -1);
}
}
- return desert_stone;
+ return stone_type;
}
}
+void MapgenV7::generateCaves(s16 max_stone_y)
+{
+ if (max_stone_y < node_min.Y)
+ return;
+
+ noise_cave1->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
+ noise_cave2->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
+
+ v3s16 em = vm->m_area.getExtent();
+ 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++) {
+ bool column_is_open = false; // Is column open to overground
+ bool is_tunnel = false; // Is tunnel or tunnel floor
+ // Indexes at column top (node_max.Y)
+ u32 vi = vm->m_area.index(x, node_max.Y, z);
+ u32 index3d = (z - node_min.Z) * zstride_1d + csize.Y * ystride +
+ (x - node_min.X);
+ // Biome of column
+ Biome *biome = (Biome *)bmgr->getRaw(biomemap[index2d]);
+
+ // Don't excavate the overgenerated stone at node_max.Y + 1,
+ // this creates a 'roof' over the tunnel, preventing light in
+ // tunnels at mapchunk borders when generating mapchunks upwards.
+ // This 'roof' is removed when the mapchunk above is generated.
+ for (s16 y = node_max.Y; y >= node_min.Y - 1; y--,
+ index3d -= ystride,
+ vm->m_area.add_y(em, vi, -1)) {
+
+ content_t c = vm->m_data[vi].getContent();
+ if (c == CONTENT_AIR || c == biome->c_water_top ||
+ c == biome->c_water) {
+ column_is_open = true;
+ continue;
+ }
+ // Ground
+ float d1 = contour(noise_cave1->result[index3d]);
+ float d2 = contour(noise_cave2->result[index3d]);
+
+ if (d1 * d2 > 0.3f && ndef->get(c).is_ground_content) {
+ // In tunnel and ground content, excavate
+ vm->m_data[vi] = MapNode(CONTENT_AIR);
+ is_tunnel = true;
+ } else {
+ // Not in tunnel or not ground content
+ if (is_tunnel && column_is_open &&
+ (c == biome->c_filler || c == biome->c_stone))
+ // Tunnel entrance floor
+ vm->m_data[vi] = MapNode(biome->c_top);
+
+ column_is_open = false;
+ is_tunnel = false;
+ }
+ }
+ }
+
+ if (node_min.Y >= water_level)
+ return;
+
+ PseudoRandom ps(blockseed + 21343);
+ u32 bruises_count = ps.range(0, 2);
+ for (u32 i = 0; i < bruises_count; i++) {
+ CaveV7 cave(this, &ps);
+ cave.makeCave(node_min, node_max, max_stone_y);
+ }
+}
+
+
+///////////////////////////////////////////////////////////////
+
+
+#if 0
+void MapgenV7::carveRivers() {
+ MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
+ MapNode n_stone(c_stone);
+ u32 index = 0;
+
+ int river_depth = 4;
+
+ for (s16 z = node_min.Z; z <= node_max.Z; z++)
+ for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
+ float terrain_mod = noise_terrain_mod->result[index];
+ NoiseParams *np = noise_terrain_river->np;
+ np.persist = noise_terrain_persist->result[index];
+ float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
+ float height = terrain_river * (1 - abs(terrain_mod)) *
+ noise_terrain_river->np.scale;
+ height = log(height * height); //log(h^3) is pretty interesting for terrain
+
+ s16 y = heightmap[index];
+ if (height < 1.0 && y > river_depth &&
+ y - river_depth >= node_min.Y && y <= node_max.Y) {
+
+ for (s16 ry = y; ry != y - river_depth; ry--) {
+ u32 vi = vm->m_area.index(x, ry, z);
+ vm->m_data[vi] = n_air;
+ }
+
+ u32 vi = vm->m_area.index(x, y - river_depth, z);
+ vm->m_data[vi] = n_water_source;
+ }
+ }
+}
+#endif
+
+
#if 0
void MapgenV7::addTopNodes()
{
}
}
#endif
-
-
-void MapgenV7::generateCaves(int max_stone_y)
-{
- if (max_stone_y >= node_min.Y) {
- u32 index = 0;
- 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 i = vm->m_area.index(node_min.X, y, z);
- for (s16 x = node_min.X; x <= node_max.X;
- x++, i++, index++, index2d++) {
- float d1 = contour(noise_cave1->result[index]);
- float d2 = contour(noise_cave2->result[index]);
- if (d1 * d2 > 0.3) {
- Biome *biome = (Biome *)bmgr->
- getRaw(biomemap[index2d]);
- content_t c = vm->m_data[i].getContent();
- if (!ndef->get(c).is_ground_content ||
- c == CONTENT_AIR ||
- (y <= water_level &&
- c != biome->c_stone &&
- c != c_stone))
- continue;
-
- vm->m_data[i] = MapNode(CONTENT_AIR);
- }
- }
- index2d -= ystride;
- }
- index2d += ystride;
- }
- }
-
- 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++) {
- CaveV7 cave(this, &ps);
- cave.makeCave(node_min, node_max, max_stone_y);
- }
-}
-
projects / minetest.git / blobdiff