diff options
Diffstat (limited to 'src/cavegen.cpp')
| -rw-r--r-- | src/cavegen.cpp | 835 |
1 files changed, 384 insertions, 451 deletions
diff --git a/src/cavegen.cpp b/src/cavegen.cpp index b8abfbca5..bb6aa25a6 100644 --- a/src/cavegen.cpp +++ b/src/cavegen.cpp @@ -23,46 +23,183 @@ with this program; if not, write to the Free Software Foundation, Inc., #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); -///////////////////////////////////////// Caves V5 +//// +//// 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; -CaveV5::CaveV5(Mapgen *mg, PseudoRandom *ps) + 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() { - this->mg = mg; - this->vm = mg->vm; - this->ndef = mg->ndef; - this->water_level = mg->water_level; - this->ps = ps; - c_water_source = ndef->getId("mapgen_water_source"); - c_lava_source = ndef->getId("mapgen_lava_source"); - c_ice = ndef->getId("mapgen_ice"); - this->np_caveliquids = &nparams_caveliquids; - this->ystride = mg->csize.X; - - if (c_ice == CONTENT_IGNORE) - c_ice = CONTENT_AIR; + delete noise_cave1; + delete noise_cave2; +} - dswitchint = ps->range(1, 14); - flooded = ps->range(1, 2) == 2; - part_max_length_rs = ps->range(2, 4); - tunnel_routepoints = ps->range(5, ps->range(15, 30)); - min_tunnel_diameter = 5; - max_tunnel_diameter = ps->range(7, ps->range(8, 24)); +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); + + 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++) { + bool column_is_open = false; // Is column open to overground + bool is_under_river = false; // Is column under river water + bool is_tunnel = false; // Is tunnel or tunnel floor + 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); + // Biome of column + Biome *biome = (Biome *)m_bmgr->getRaw(biomemap[index2d]); + + // 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; + } else 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_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 + if (is_under_river) + vm->m_data[vi] = MapNode(biome->c_riverbed); + else + vm->m_data[vi] = MapNode(biome->c_top); + } - large_cave_is_flat = (ps->range(0, 1) == 0); + column_is_open = false; + is_tunnel = false; + } + } + } } -void CaveV5::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) +//// +//// CavesRandomWalk +//// + +CavesRandomWalk::CavesRandomWalk( + INodeDefManager *ndef, + GenerateNotifier *gennotify, + s32 seed, + int water_level, + content_t water_source, + content_t lava_source) { - node_min = nmin; - node_max = nmax; + assert(ndef); + + this->ndef = ndef; + this->gennotify = gennotify; + this->seed = seed; + this->water_level = water_level; + this->np_caveliquids = &nparams_caveliquids; + this->lava_depth = DEFAULT_LAVA_DEPTH; + + c_water_source = water_source; + if (c_water_source == CONTENT_IGNORE) + c_water_source = ndef->getId("mapgen_water_source"); + if (c_water_source == CONTENT_IGNORE) + c_water_source = CONTENT_AIR; + + c_lava_source = lava_source; + if (c_lava_source == CONTENT_IGNORE) + c_lava_source = ndef->getId("mapgen_lava_source"); + if (c_lava_source == CONTENT_IGNORE) + c_lava_source = CONTENT_AIR; +} + + +void CavesRandomWalk::makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax, + PseudoRandom *ps, bool is_large_cave, int max_stone_height, s16 *heightmap) +{ + assert(vm); + assert(ps); + + this->vm = vm; + this->ps = ps; + this->node_min = nmin; + this->node_max = nmax; + this->heightmap = heightmap; + this->large_cave = is_large_cave; + + this->ystride = nmax.X - nmin.X + 1; + + // Set initial parameters from randomness + int dswitchint = ps->range(1, 14); + flooded = ps->range(1, 2) == 2; + + if (large_cave) { + part_max_length_rs = ps->range(2, 4); + tunnel_routepoints = ps->range(5, ps->range(15, 30)); + min_tunnel_diameter = 5; + max_tunnel_diameter = ps->range(7, ps->range(8, 24)); + } else { + part_max_length_rs = ps->range(2, 9); + tunnel_routepoints = ps->range(10, ps->range(15, 30)); + min_tunnel_diameter = 2; + max_tunnel_diameter = ps->range(2, 6); + } + + large_cave_is_flat = (ps->range(0, 1) == 0); + main_direction = v3f(0, 0, 0); // Allowed route area size in nodes @@ -72,10 +209,10 @@ void CaveV5::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) // 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 @@ -84,13 +221,15 @@ void CaveV5::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) // Limit maximum to area route_y_max = rangelim(route_y_max, 0, ar.Y - 1); - s16 min = 0; + if (large_cave) { + s16 minpos = 0; if (node_min.Y < water_level && node_max.Y > water_level) { - min = water_level - max_tunnel_diameter/3 - of.Y; - route_y_max = water_level + max_tunnel_diameter/3 - of.Y; + minpos = water_level - max_tunnel_diameter / 3 - of.Y; + route_y_max = water_level + max_tunnel_diameter / 3 - of.Y; } - route_y_min = ps->range(min, min + max_tunnel_diameter); - route_y_min = rangelim(route_y_min, 0, route_y_max); + route_y_min = ps->range(minpos, minpos + max_tunnel_diameter); + route_y_min = rangelim(route_y_min, 0, route_y_max); + } s16 route_start_y_min = route_y_min; s16 route_start_y_max = route_y_max; @@ -99,30 +238,42 @@ void CaveV5::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) 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 - v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); - GenNotifyType notifytype = GENNOTIFY_LARGECAVE_BEGIN; - mg->gennotify.addEvent(notifytype, abs_pos); + if (gennotify) { + v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); + GenNotifyType notifytype = large_cave ? + GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN; + gennotify->addEvent(notifytype, abs_pos); + } // Generate some tunnel starting from orp for (u16 j = 0; j < tunnel_routepoints; j++) makeTunnel(j % dswitchint == 0); // Add generation notify end event - abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); - notifytype = GENNOTIFY_LARGECAVE_END; - mg->gennotify.addEvent(notifytype, abs_pos); + if (gennotify) { + v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); + GenNotifyType notifytype = large_cave ? + GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END; + gennotify->addEvent(notifytype, abs_pos); + } } -void CaveV5::makeTunnel(bool dirswitch) +void CavesRandomWalk::makeTunnel(bool dirswitch) { + if (dirswitch && !large_cave) { + 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; + } + // Randomize size s16 min_d = min_tunnel_diameter; s16 max_d = max_tunnel_diameter; @@ -130,47 +281,38 @@ void CaveV5::makeTunnel(bool dirswitch) s16 rs_part_max_length_rs = rs * part_max_length_rs; v3s16 maxlen; - maxlen = v3s16( - rs_part_max_length_rs, - rs_part_max_length_rs / 2, - rs_part_max_length_rs - ); + if (large_cave) { + maxlen = v3s16( + rs_part_max_length_rs, + rs_part_max_length_rs / 2, + rs_part_max_length_rs + ); + } else { + maxlen = v3s16( + rs_part_max_length_rs, + ps->range(1, rs_part_max_length_rs), + rs_part_max_length_rs + ); + } v3f vec; // Jump downward sometimes - vec = v3f( - (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 - ); + if (!large_cave && ps->range(0, 12) == 0) { + 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.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. // It is only necessary to check the startpoint and endpoint. - v3s16 orpi(orp.X, orp.Y, orp.Z); - v3s16 veci(vec.X, vec.Y, vec.Z); - v3s16 p; - - p = orpi + veci + of + rs / 2; - if (p.Z >= node_min.Z && p.Z <= node_max.Z && - p.X >= node_min.X && p.X <= node_max.X) { - u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X); - s16 h = mg->heightmap[index]; - if (h < p.Y) - return; - } else if (p.Y > water_level) { - return; // If it's not in our heightmap, use a simple heuristic - } - - p = orpi + of + rs / 2; - if (p.Z >= node_min.Z && p.Z <= node_max.Z && - p.X >= node_min.X && p.X <= node_max.X) { - u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X); - s16 h = mg->heightmap[index]; - if (h < p.Y) - return; - } else if (p.Y > water_level) { + v3s16 p1 = v3s16(orp.X, orp.Y, orp.Z) + of + rs / 2; + v3s16 p2 = v3s16(vec.X, vec.Y, vec.Z) + p1; + if (isPosAboveSurface(p1) || isPosAboveSurface(p2)) return; - } vec += main_direction; @@ -193,21 +335,21 @@ void CaveV5::makeTunnel(bool dirswitch) 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; } -void CaveV5::carveRoute(v3f vec, float f, bool randomize_xz) +void CavesRandomWalk::carveRoute(v3f vec, float f, bool randomize_xz) { MapNode airnode(CONTENT_AIR); MapNode waternode(c_water_source); @@ -217,22 +359,24 @@ void CaveV5::carveRoute(v3f vec, float f, bool randomize_xz) startp += of; float nval = NoisePerlin3D(np_caveliquids, startp.X, - startp.Y, startp.Z, mg->seed); - MapNode liquidnode = (nval < 0.40 && node_max.Y < MGV5_LAVA_DEPTH) ? + startp.Y, startp.Z, seed); + 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); d1 += ps->range(-1, 1); } + bool flat_cave_floor = !large_cave && ps->range(0, 2) == 2; + 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++) { @@ -241,6 +385,10 @@ void CaveV5::carveRoute(v3f vec, float f, bool randomize_xz) s16 si2 = rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1); for (s16 y0 = -si2; y0 <= si2; y0++) { + // Make better floors in small caves + if (flat_cave_floor && y0 <= -rs / 2 && rs <= 7) + continue; + if (large_cave_is_flat) { // Make large caves not so tall if (rs > 7 && abs(y0) >= rs / 3) @@ -258,63 +406,105 @@ void CaveV5::carveRoute(v3f vec, float f, bool randomize_xz) 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 + if (large_cave) { + 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; + } else { + if (c == CONTENT_IGNORE) + continue; + vm->m_data[i] = airnode; + vm->m_flags[i] |= VMANIP_FLAG_CAVE; + } } } } } -///////////////////////////////////////// Caves V6 +inline bool CavesRandomWalk::isPosAboveSurface(v3s16 p) +{ + if (heightmap != NULL && + p.Z >= node_min.Z && p.Z <= node_max.Z && + p.X >= node_min.X && p.X <= node_max.X) { + u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X); + if (heightmap[index] < p.Y) + return true; + } else if (p.Y > water_level) { + return true; + } + + return false; +} + + +//// +//// CavesV6 +//// + +CavesV6::CavesV6(INodeDefManager *ndef, GenerateNotifier *gennotify, + int water_level, content_t water_source, content_t lava_source) +{ + assert(ndef); + + this->ndef = ndef; + this->gennotify = gennotify; + this->water_level = water_level; + + c_water_source = water_source; + if (c_water_source == CONTENT_IGNORE) + c_water_source = ndef->getId("mapgen_water_source"); + if (c_water_source == CONTENT_IGNORE) + c_water_source = CONTENT_AIR; + + c_lava_source = lava_source; + if (c_lava_source == CONTENT_IGNORE) + c_lava_source = ndef->getId("mapgen_lava_source"); + if (c_lava_source == CONTENT_IGNORE) + c_lava_source = CONTENT_AIR; +} -CaveV6::CaveV6(MapgenV6 *mg, PseudoRandom *ps, PseudoRandom *ps2, bool is_large_cave) +void CavesV6::makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax, + PseudoRandom *ps, PseudoRandom *ps2, + bool is_large_cave, int max_stone_height, s16 *heightmap) { - this->mg = mg; - this->vm = mg->vm; - this->ndef = mg->ndef; - this->water_level = mg->water_level; - this->large_cave = is_large_cave; - this->ps = ps; - this->ps2 = ps2; - this->c_water_source = mg->c_water_source; - this->c_lava_source = mg->c_lava_source; + assert(vm); + assert(ps); + assert(ps2); + + this->vm = vm; + this->ps = ps; + this->ps2 = ps2; + this->node_min = nmin; + this->node_max = nmax; + this->heightmap = heightmap; + this->large_cave = is_large_cave; + + this->ystride = nmax.X - nmin.X + 1; + // Set initial parameters from randomness min_tunnel_diameter = 2; max_tunnel_diameter = ps->range(2, 6); - dswitchint = ps->range(1, 14); - flooded = true; - + 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)); + part_max_length_rs = ps->range(2, 4); + tunnel_routepoints = ps->range(5, ps->range(15, 30)); min_tunnel_diameter = 5; - max_tunnel_diameter = ps->range(7, ps->range(8,24)); + max_tunnel_diameter = ps->range(7, ps->range(8, 24)); } else { - part_max_length_rs = ps->range(2,9); - tunnel_routepoints = ps->range(10, ps->range(15,30)); + part_max_length_rs = ps->range(2, 9); + tunnel_routepoints = ps->range(10, ps->range(15, 30)); } + large_cave_is_flat = (ps->range(0, 1) == 0); - large_cave_is_flat = (ps->range(0,1) == 0); -} - - -void CaveV6::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) -{ - node_min = nmin; - node_max = nmax; - max_stone_y = max_stone_height; main_direction = v3f(0, 0, 0); // Allowed route area size in nodes @@ -325,67 +515,68 @@ void CaveV6::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) // 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; + 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_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7; + route_y_max = -of.Y + max_stone_height + max_tunnel_diameter / 2 + 7; // Limit maximum to area route_y_max = rangelim(route_y_max, 0, ar.Y - 1); if (large_cave) { - s16 min = 0; + s16 minpos = 0; if (node_min.Y < water_level && node_max.Y > water_level) { - min = water_level - max_tunnel_diameter/3 - of.Y; - route_y_max = water_level + max_tunnel_diameter/3 - of.Y; + minpos = water_level - max_tunnel_diameter / 3 - of.Y; + route_y_max = water_level + max_tunnel_diameter / 3 - of.Y; } - route_y_min = ps->range(min, min + max_tunnel_diameter); + route_y_min = ps->range(minpos, minpos + max_tunnel_diameter); route_y_min = rangelim(route_y_min, 0, route_y_max); } s16 route_start_y_min = route_y_min; s16 route_start_y_max = route_y_max; - route_start_y_min = rangelim(route_start_y_min, 0, ar.Y-1); - route_start_y_max = rangelim(route_start_y_max, route_start_y_min, ar.Y-1); + route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1); + 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 - v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); - GenNotifyType notifytype = large_cave ? - GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN; - mg->gennotify.addEvent(notifytype, abs_pos); + if (gennotify != NULL) { + v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); + GenNotifyType notifytype = large_cave ? + GENNOTIFY_LARGECAVE_BEGIN : GENNOTIFY_CAVE_BEGIN; + gennotify->addEvent(notifytype, abs_pos); + } // Generate some tunnel starting from orp for (u16 j = 0; j < tunnel_routepoints; j++) makeTunnel(j % dswitchint == 0); // Add generation notify end event - abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); - notifytype = large_cave ? - GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END; - mg->gennotify.addEvent(notifytype, abs_pos); + if (gennotify != NULL) { + v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); + GenNotifyType notifytype = large_cave ? + GENNOTIFY_LARGECAVE_END : GENNOTIFY_CAVE_END; + gennotify->addEvent(notifytype, abs_pos); + } } -void CaveV6::makeTunnel(bool dirswitch) +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; } @@ -410,54 +601,30 @@ void CaveV6::makeTunnel(bool dirswitch) ); } - 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 caused by overgenerated large caves. + // Do not make caves that are entirely above ground, to fix shadow bugs + // caused by overgenerated large caves. // It is only necessary to check the startpoint and endpoint. - v3s16 orpi(orp.X, orp.Y, orp.Z); - v3s16 veci(vec.X, vec.Y, vec.Z); - s16 h1; - s16 h2; - - v3s16 p1 = orpi + veci + of + rs / 2; - if (p1.Z >= node_min.Z && p1.Z <= node_max.Z && - p1.X >= node_min.X && p1.X <= node_max.X) { - u32 index1 = (p1.Z - node_min.Z) * mg->ystride + - (p1.X - node_min.X); - h1 = mg->heightmap[index1]; - } else { - h1 = water_level; // If not in heightmap - } + v3s16 p1 = v3s16(orp.X, orp.Y, orp.Z) + of + rs / 2; + v3s16 p2 = v3s16(vec.X, vec.Y, vec.Z) + p1; - v3s16 p2 = orpi + of + rs / 2; - if (p2.Z >= node_min.Z && p2.Z <= node_max.Z && - p2.X >= node_min.X && p2.X <= node_max.X) { - u32 index2 = (p2.Z - node_min.Z) * mg->ystride + - (p2.X - node_min.X); - h2 = mg->heightmap[index2]; - } else { - h2 = water_level; - } - - // If startpoint and endpoint are above ground, - // disable placing of nodes in carveRoute while - // still running all pseudorandom calls to ensure - // caves consistent with existing worlds. - bool tunnel_above_ground = p1.Y > h1 && p2.Y > h2; + // If startpoint and endpoint are above ground, disable placement of nodes + // in carveRoute while still running all PseudoRandom calls to ensure caves + // are consistent with existing worlds. + bool tunnel_above_ground = + p1.Y > getSurfaceFromHeightmap(p1) && + p2.Y > getSurfaceFromHeightmap(p2); vec += main_direction; @@ -481,21 +648,22 @@ void CaveV6::makeTunnel(bool dirswitch) 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; } -void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz, bool tunnel_above_ground) +void CavesV6::carveRoute(v3f vec, float f, bool randomize_xz, + bool tunnel_above_ground) { MapNode airnode(CONTENT_AIR); MapNode waternode(c_water_source); @@ -505,11 +673,11 @@ void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz, bool tunnel_above_g 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; + s16 d0 = -rs / 2; s16 d1 = d0 + rs; if (randomize_xz) { d0 += ps->range(-1, 1); @@ -546,13 +714,10 @@ void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz, bool tunnel_above_g 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 - 2) ? - lavanode : airnode; + if (full_ymin < water_level && full_ymax > water_level) { + vm->m_data[i] = (p.Y <= water_level) ? waternode : airnode; + } else if (full_ymax < water_level) { + vm->m_data[i] = (p.Y < startp.Y - 2) ? lavanode : airnode; } else { vm->m_data[i] = airnode; } @@ -569,246 +734,14 @@ void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz, bool tunnel_above_g } -///////////////////////////////////////// Caves V7 - - -CaveV7::CaveV7(MapgenV7 *mg, PseudoRandom *ps) -{ - this->mg = mg; - this->vm = mg->vm; - this->ndef = mg->ndef; - this->water_level = mg->water_level; - this->ps = ps; - this->c_water_source = mg->c_water_source; - this->c_lava_source = mg->c_lava_source; - this->c_ice = mg->c_ice; - this->np_caveliquids = &nparams_caveliquids; - - dswitchint = ps->range(1, 14); - flooded = ps->range(1, 2) == 2; - - part_max_length_rs = ps->range(2, 4); - tunnel_routepoints = ps->range(5, ps->range(15, 30)); - min_tunnel_diameter = 5; - max_tunnel_diameter = ps->range(7, ps->range(8, 24)); - - large_cave_is_flat = (ps->range(0, 1) == 0); -} - - -void CaveV7::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) +inline s16 CavesV6::getSurfaceFromHeightmap(v3s16 p) { - node_min = nmin; - node_max = nmax; - max_stone_y = max_stone_height; - main_direction = v3f(0, 0, 0); - - // Allowed route area size in nodes - ar = node_max - node_min + v3s16(1, 1, 1); - // Area starting point in nodes - of = node_min; - - // Allow a bit more - //(this should be more than the maximum radius of the tunnel) - 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; - - route_y_min = 0; - // Allow half a diameter + 7 over stone surface - route_y_max = -of.Y + max_stone_y + max_tunnel_diameter / 2 + 7; - - // Limit maximum to area - route_y_max = rangelim(route_y_max, 0, ar.Y - 1); - - s16 min = 0; - if (node_min.Y < water_level && node_max.Y > water_level) { - min = water_level - max_tunnel_diameter/3 - of.Y; - route_y_max = water_level + max_tunnel_diameter/3 - of.Y; - } - route_y_min = ps->range(min, min + max_tunnel_diameter); - route_y_min = rangelim(route_y_min, 0, route_y_max); - - s16 route_start_y_min = route_y_min; - s16 route_start_y_max = route_y_max; - - route_start_y_min = rangelim(route_start_y_min, 0, ar.Y - 1); - 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 - ); - - // Add generation notify begin event - v3s16 abs_pos(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); - GenNotifyType notifytype = GENNOTIFY_LARGECAVE_BEGIN; - mg->gennotify.addEvent(notifytype, abs_pos); - - // Generate some tunnel starting from orp - for (u16 j = 0; j < tunnel_routepoints; j++) - makeTunnel(j % dswitchint == 0); - - // Add generation notify end event - abs_pos = v3s16(of.X + orp.X, of.Y + orp.Y, of.Z + orp.Z); - notifytype = GENNOTIFY_LARGECAVE_END; - mg->gennotify.addEvent(notifytype, abs_pos); -} - - -void CaveV7::makeTunnel(bool dirswitch) -{ - // Randomize size - s16 min_d = min_tunnel_diameter; - s16 max_d = max_tunnel_diameter; - rs = ps->range(min_d, max_d); - s16 rs_part_max_length_rs = rs * part_max_length_rs; - - v3s16 maxlen; - maxlen = v3s16( - rs_part_max_length_rs, - rs_part_max_length_rs / 2, - rs_part_max_length_rs - ); - - v3f vec; - // Jump downward sometimes - vec = v3f( - (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 - ); - - // Do not make caves that are above ground. - // It is only necessary to check the startpoint and endpoint. - v3s16 orpi(orp.X, orp.Y, orp.Z); - v3s16 veci(vec.X, vec.Y, vec.Z); - v3s16 p; - - p = orpi + veci + of + rs / 2; - if (p.Z >= node_min.Z && p.Z <= node_max.Z && - p.X >= node_min.X && p.X <= node_max.X) { - u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X); - s16 h = mg->ridge_heightmap[index]; - if (h < p.Y) - return; - } else if (p.Y > water_level) { - return; // If it's not in our heightmap, use a simple heuristic - } - - p = orpi + of + rs / 2; - if (p.Z >= node_min.Z && p.Z <= node_max.Z && + if (heightmap != NULL && + p.Z >= node_min.Z && p.Z <= node_max.Z && p.X >= node_min.X && p.X <= node_max.X) { - u32 index = (p.Z - node_min.Z) * mg->ystride + (p.X - node_min.X); - s16 h = mg->ridge_heightmap[index]; - if (h < p.Y) - return; - } else if (p.Y > water_level) { - return; - } - - vec += main_direction; - - v3f rp = orp + vec; - if (rp.X < 0) - rp.X = 0; - else if (rp.X >= ar.X) - rp.X = ar.X - 1; - - if (rp.Y < route_y_min) - rp.Y = route_y_min; - else if (rp.Y >= route_y_max) - rp.Y = route_y_max - 1; - - if (rp.Z < 0) - rp.Z = 0; - else if (rp.Z >= ar.Z) - rp.Z = ar.Z - 1; - - vec = rp - orp; - - float veclen = vec.getLength(); - if (veclen < 0.05) - veclen = 1.0; - - // 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) - carveRoute(vec, f, randomize_xz); - - orp = rp; -} - - -void CaveV7::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 < MGV7_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; - } - } + u32 index = (p.Z - node_min.Z) * ystride + (p.X - node_min.X); + return heightmap[index]; + } else { + return water_level; } } |