#include "mapgen_v5.h"
#include "mapgen_v6.h"
#include "mapgen_v7.h"
+#include "mg_biome.h"
#include "cavegen.h"
-NoiseParams nparams_caveliquids(0, 1, v3f(150.0, 150.0, 150.0), 776, 3, 0.6, 2.0);
+static NoiseParams nparams_caveliquids(0, 1, v3f(150.0, 150.0, 150.0), 776, 3, 0.6, 2.0);
+
+
+////
+//// CavesNoiseIntersection
+////
+
+CavesNoiseIntersection::CavesNoiseIntersection(
+ INodeDefManager *nodedef, BiomeManager *biomemgr, v3s16 chunksize,
+ NoiseParams *np_cave1, NoiseParams *np_cave2, s32 seed, float cave_width)
+{
+ assert(nodedef);
+ assert(biomemgr);
+
+ m_ndef = nodedef;
+ m_bmgr = biomemgr;
+
+ m_csize = chunksize;
+ m_cave_width = cave_width;
+
+ m_ystride = m_csize.X;
+ m_zstride_1d = m_csize.X * (m_csize.Y + 1);
+
+ // Noises are created using 1-down overgeneration
+ // A Nx-by-1-by-Nz-sized plane is at the bottom of the desired for
+ // re-carving the solid overtop placed for blocking sunlight
+ noise_cave1 = new Noise(np_cave1, seed, m_csize.X, m_csize.Y + 1, m_csize.Z);
+ noise_cave2 = new Noise(np_cave2, seed, m_csize.X, m_csize.Y + 1, m_csize.Z);
+}
+
+
+CavesNoiseIntersection::~CavesNoiseIntersection()
+{
+ delete noise_cave1;
+ delete noise_cave2;
+}
+
+
+void CavesNoiseIntersection::generateCaves(MMVManip *vm,
+ v3s16 nmin, v3s16 nmax, u8 *biomemap)
+{
+ assert(vm);
+ assert(biomemap);
+
+ noise_cave1->perlinMap3D(nmin.X, nmin.Y - 1, nmin.Z);
+ noise_cave2->perlinMap3D(nmin.X, nmin.Y - 1, nmin.Z);
+
+ const v3s16 &em = vm->m_area.getExtent();
+ u32 index2d = 0; // Biomemap index
+
+ for (s16 z = nmin.Z; z <= nmax.Z; z++)
+ for (s16 x = nmin.X; x <= nmax.X; x++, index2d++) {
+ bool column_is_open = false; // Is column open to overground
+ bool is_under_river = false; // Is column under river water
+ bool is_under_tunnel = false; // Is tunnel or is under tunnel
+ // Indexes at column top
+ u32 vi = vm->m_area.index(x, nmax.Y, z);
+ u32 index3d = (z - nmin.Z) * m_zstride_1d + m_csize.Y * m_ystride +
+ (x - nmin.X); // 3D noise index
+ // Biome of column
+ Biome *biome = (Biome *)m_bmgr->getRaw(biomemap[index2d]);
+ u16 depth_top = biome->depth_top;
+ u16 base_filler = depth_top + biome->depth_filler;
+ u16 depth_riverbed = biome->depth_riverbed;
+ u16 nplaced = 0;
+ // Don't excavate the overgenerated stone at nmax.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 = nmax.Y; y >= nmin.Y - 1; y--,
+ index3d -= m_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;
+ }
+
+ if (c == biome->c_river_water) {
+ column_is_open = true;
+ is_under_river = true;
+ continue;
+ }
+ // Ground
+ float d1 = contour(noise_cave1->result[index3d]);
+ float d2 = contour(noise_cave2->result[index3d]);
+
+ if (d1 * d2 > m_cave_width && m_ndef->get(c).is_ground_content) {
+ // In tunnel and ground content, excavate
+ vm->m_data[vi] = MapNode(CONTENT_AIR);
+ is_under_tunnel = true;
+ } else if (column_is_open && is_under_tunnel &&
+ (c == biome->c_stone || c == biome->c_filler)) {
+ // Tunnel entrance floor, place biome surface nodes
+ if (is_under_river) {
+ if (nplaced < depth_riverbed) {
+ vm->m_data[vi] = MapNode(biome->c_riverbed);
+ nplaced++;
+ } else {
+ // Disable top/filler placement
+ column_is_open = false;
+ is_under_river = false;
+ is_under_tunnel = false;
+ }
+ } else 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 {
+ // Disable top/filler placement
+ column_is_open = false;
+ is_under_tunnel = false;
+ }
+ } else {
+ // Not tunnel or tunnel entrance floor
+ column_is_open = false;
+ }
+ }
+ }
+}
+
+
+////
+//// CavernsNoise
+////
+
+CavernsNoise::CavernsNoise(
+ INodeDefManager *nodedef, v3s16 chunksize, NoiseParams *np_cavern,
+ s32 seed, float cavern_limit, float cavern_taper, float cavern_threshold)
+{
+ assert(nodedef);
+
+ m_ndef = nodedef;
+
+ m_csize = chunksize;
+ m_cavern_limit = cavern_limit;
+ m_cavern_taper = cavern_taper;
+ m_cavern_threshold = cavern_threshold;
+
+ m_ystride = m_csize.X;
+ m_zstride_1d = m_csize.X * (m_csize.Y + 1);
+
+ // Noise is created using 1-down overgeneration
+ // A Nx-by-1-by-Nz-sized plane is at the bottom of the desired for
+ // re-carving the solid overtop placed for blocking sunlight
+ noise_cavern = new Noise(np_cavern, seed, m_csize.X, m_csize.Y + 1, m_csize.Z);
+
+ c_water_source = m_ndef->getId("mapgen_water_source");
+ if (c_water_source == CONTENT_IGNORE)
+ c_water_source = CONTENT_AIR;
+
+ c_lava_source = m_ndef->getId("mapgen_lava_source");
+ if (c_lava_source == CONTENT_IGNORE)
+ c_lava_source = CONTENT_AIR;
+}
+
+
+CavernsNoise::~CavernsNoise()
+{
+ delete noise_cavern;
+}
+
+
+bool CavernsNoise::generateCaverns(MMVManip *vm, v3s16 nmin, v3s16 nmax)
+{
+ assert(vm);
+
+ // Calculate noise
+ noise_cavern->perlinMap3D(nmin.X, nmin.Y - 1, nmin.Z);
+
+ // Cache cavern_amp values
+ float *cavern_amp = new float[m_csize.Y + 1];
+ u8 cavern_amp_index = 0; // Index zero at column top
+ for (s16 y = nmax.Y; y >= nmin.Y - 1; y--, cavern_amp_index++) {
+ cavern_amp[cavern_amp_index] =
+ MYMIN((m_cavern_limit - y) / (float)m_cavern_taper, 1.0f);
+ }
+
+ //// Place nodes
+ bool near_cavern = false;
+ const v3s16 &em = vm->m_area.getExtent();
+ u32 index2d = 0;
+
+ for (s16 z = nmin.Z; z <= nmax.Z; z++)
+ for (s16 x = nmin.X; x <= nmax.X; x++, index2d++) {
+ // Reset cave_amp index to column top
+ cavern_amp_index = 0;
+ // Initial voxelmanip index at column top
+ u32 vi = vm->m_area.index(x, nmax.Y, z);
+ // Initial 3D noise index at column top
+ u32 index3d = (z - nmin.Z) * m_zstride_1d + m_csize.Y * m_ystride +
+ (x - nmin.X);
+ // Don't excavate the overgenerated stone at node_max.Y + 1,
+ // this creates a 'roof' over the cavern, preventing light in
+ // caverns at mapchunk borders when generating mapchunks upwards.
+ // This 'roof' is excavated when the mapchunk above is generated.
+ for (s16 y = nmax.Y; y >= nmin.Y - 1; y--,
+ index3d -= m_ystride,
+ vm->m_area.add_y(em, vi, -1),
+ cavern_amp_index++) {
+ content_t c = vm->m_data[vi].getContent();
+ float n_absamp_cavern = fabs(noise_cavern->result[index3d]) *
+ cavern_amp[cavern_amp_index];
+ // Disable CavesRandomWalk at a safe distance from caverns
+ // to avoid excessively spreading liquids in caverns.
+ if (n_absamp_cavern > m_cavern_threshold - 0.1f) {
+ near_cavern = true;
+ if (n_absamp_cavern > m_cavern_threshold &&
+ m_ndef->get(c).is_ground_content)
+ vm->m_data[vi] = MapNode(CONTENT_AIR);
+ }
+ }
+ }
+
+ delete[] cavern_amp;
+
+ return near_cavern;
+}
+
////
//// CavesRandomWalk
CavesRandomWalk::CavesRandomWalk(
INodeDefManager *ndef,
GenerateNotifier *gennotify,
- int seed,
+ s32 seed,
int water_level,
content_t water_source,
- content_t lava_source)
+ content_t lava_source,
+ int lava_depth)
{
assert(ndef);
this->seed = seed;
this->water_level = water_level;
this->np_caveliquids = &nparams_caveliquids;
- this->lava_depth = DEFAULT_LAVA_DEPTH;
+ this->lava_depth = lava_depth;
c_water_source = water_source;
if (c_water_source == CONTENT_IGNORE)
this->ystride = nmax.X - nmin.X + 1;
// Set initial parameters from randomness
- dswitchint = ps->range(1, 14);
- flooded = ps->range(1, 2) == 2;
+ int dswitchint = ps->range(1, 14);
+ flooded = ps->range(1, 2) == 2;
if (large_cave) {
part_max_length_rs = ps->range(2, 4);
// Allow a bit more
//(this should be more than the maximum radius of the tunnel)
- s16 insure = 10;
+ const s16 insure = 10;
s16 more = MYMAX(MAP_BLOCKSIZE - max_tunnel_diameter / 2 - insure, 1);
- ar += v3s16(1,0,1) * more * 2;
- of -= v3s16(1,0,1) * more;
+ ar += v3s16(1, 0, 1) * more * 2;
+ of -= v3s16(1, 0, 1) * more;
route_y_min = 0;
// Allow half a diameter + 7 over stone surface
route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
// Randomize starting position
- orp = v3f(
- (float)(ps->next() % ar.X) + 0.5,
- (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
- (float)(ps->next() % ar.Z) + 0.5
- );
+ orp.Z = (float)(ps->next() % ar.Z) + 0.5f;
+ orp.Y = (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5f;
+ orp.X = (float)(ps->next() % ar.X) + 0.5f;
// Add generation notify begin event
if (gennotify) {
void CavesRandomWalk::makeTunnel(bool dirswitch)
{
if (dirswitch && !large_cave) {
- main_direction = v3f(
- ((float)(ps->next() % 20) - (float)10) / 10,
- ((float)(ps->next() % 20) - (float)10) / 30,
- ((float)(ps->next() % 20) - (float)10) / 10
- );
+ main_direction.Z = ((float)(ps->next() % 20) - (float)10) / 10;
+ main_direction.Y = ((float)(ps->next() % 20) - (float)10) / 30;
+ main_direction.X = ((float)(ps->next() % 20) - (float)10) / 10;
+
main_direction *= (float)ps->range(0, 10) / 10;
}
v3f vec;
// Jump downward sometimes
if (!large_cave && ps->range(0, 12) == 0) {
- vec = v3f(
- (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
- (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
- (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
- );
+ vec.Z = (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2;
+ vec.Y = (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y;
+ vec.X = (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2;
} else {
- vec = v3f(
- (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2,
- (float)(ps->next() % (maxlen.Y * 1)) - (float)maxlen.Y / 2,
- (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2
- );
+ vec.Z = (float)(ps->next() % (maxlen.Z * 1)) - (float)maxlen.Z / 2;
+ vec.Y = (float)(ps->next() % (maxlen.Y * 1)) - (float)maxlen.Y / 2;
+ vec.X = (float)(ps->next() % (maxlen.X * 1)) - (float)maxlen.X / 2;
}
// Do not make caves that are above ground.
vec = rp - orp;
float veclen = vec.getLength();
- if (veclen < 0.05)
- veclen = 1.0;
+ if (veclen < 0.05f)
+ veclen = 1.0f;
// Every second section is rough
bool randomize_xz = (ps->range(1, 2) == 1);
// Carve routes
- for (float f = 0; f < 1.0; f += 1.0 / veclen)
+ for (float f = 0.f; f < 1.0f; f += 1.0f / veclen)
carveRoute(vec, f, randomize_xz);
orp = rp;
float nval = NoisePerlin3D(np_caveliquids, startp.X,
startp.Y, startp.Z, seed);
- MapNode liquidnode = (nval < 0.40 && node_max.Y < lava_depth) ?
+ MapNode liquidnode = (nval < 0.40f && node_max.Y < 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);
+ fp.X += 0.1f * ps->range(-10, 10);
+ fp.Z += 0.1f * ps->range(-10, 10);
v3s16 cp(fp.X, fp.Y, fp.Z);
- s16 d0 = -rs/2;
+ s16 d0 = -rs / 2;
s16 d1 = d0 + rs;
if (randomize_xz) {
d0 += ps->range(-1, 1);
v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
p += of;
- if (vm->m_area.contains(p) == false)
+ if (!vm->m_area.contains(p))
continue;
u32 i = vm->m_area.index(p);
// Set initial parameters from randomness
min_tunnel_diameter = 2;
max_tunnel_diameter = ps->range(2, 6);
- dswitchint = ps->range(1, 14);
+ int dswitchint = ps->range(1, 14);
if (large_cave) {
part_max_length_rs = ps->range(2, 4);
tunnel_routepoints = ps->range(5, ps->range(15, 30));
// Allow a bit more
//(this should be more than the maximum radius of the tunnel)
const s16 max_spread_amount = MAP_BLOCKSIZE;
- s16 insure = 10;
+ const s16 insure = 10;
s16 more = MYMAX(max_spread_amount - max_tunnel_diameter / 2 - insure, 1);
ar += v3s16(1, 0, 1) * more * 2;
of -= v3s16(1, 0, 1) * more;
route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y - 1);
// Randomize starting position
- orp = v3f(
- (float)(ps->next() % ar.X) + 0.5,
- (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5,
- (float)(ps->next() % ar.Z) + 0.5
- );
+ orp.Z = (float)(ps->next() % ar.Z) + 0.5f;
+ orp.Y = (float)(ps->range(route_start_y_min, route_start_y_max)) + 0.5f;
+ orp.X = (float)(ps->next() % ar.X) + 0.5f;
// Add generation notify begin event
if (gennotify != NULL) {
void CavesV6::makeTunnel(bool dirswitch)
{
if (dirswitch && !large_cave) {
- main_direction = v3f(
- ((float)(ps->next() % 20) - (float)10) / 10,
- ((float)(ps->next() % 20) - (float)10) / 30,
- ((float)(ps->next() % 20) - (float)10) / 10
- );
+ main_direction.Z = ((float)(ps->next() % 20) - (float)10) / 10;
+ main_direction.Y = ((float)(ps->next() % 20) - (float)10) / 30;
+ main_direction.X = ((float)(ps->next() % 20) - (float)10) / 10;
+
main_direction *= (float)ps->range(0, 10) / 10;
}
);
}
- v3f vec(
- (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
- (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2,
- (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
- );
+ v3f vec;
+ vec.Z = (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2;
+ vec.Y = (float)(ps->next() % maxlen.Y) - (float)maxlen.Y / 2;
+ vec.X = (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2;
// Jump downward sometimes
if (!large_cave && ps->range(0, 12) == 0) {
- vec = v3f(
- (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2,
- (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y,
- (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2
- );
+ vec.Z = (float)(ps->next() % maxlen.Z) - (float)maxlen.Z / 2;
+ vec.Y = (float)(ps->next() % (maxlen.Y * 2)) - (float)maxlen.Y;
+ vec.X = (float)(ps->next() % maxlen.X) - (float)maxlen.X / 2;
}
// Do not make caves that are entirely above ground, to fix shadow bugs
float veclen = vec.getLength();
// As odd as it sounds, veclen is *exactly* 0.0 sometimes, causing a FPE
- if (veclen < 0.05)
- veclen = 1.0;
+ if (veclen < 0.05f)
+ veclen = 1.0f;
// Every second section is rough
bool randomize_xz = (ps2->range(1, 2) == 1);
// Carve routes
- for (float f = 0; f < 1.0; f += 1.0 / veclen)
+ for (float f = 0.f; f < 1.0f; f += 1.0f / veclen)
carveRoute(vec, f, randomize_xz, tunnel_above_ground);
orp = rp;
startp += of;
v3f fp = orp + vec * f;
- fp.X += 0.1 * ps->range(-10, 10);
- fp.Z += 0.1 * ps->range(-10, 10);
+ fp.X += 0.1f * ps->range(-10, 10);
+ fp.Z += 0.1f * ps->range(-10, 10);
v3s16 cp(fp.X, fp.Y, fp.Z);
s16 d0 = -rs / 2;
v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0);
p += of;
- if (vm->m_area.contains(p) == false)
+ if (!vm->m_area.contains(p))
continue;
u32 i = vm->m_area.index(p);
p.X >= node_min.X && p.X <= node_max.X) {
u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X);
return heightmap[index];
- } else {
- return water_level;
}
+
+ return water_level;
+
}
projects / minetest.git / blobdiff