From 38e62805527b774e478617d9781bde72ce2bdcb9 Mon Sep 17 00:00:00 2001 From: paramat Date: Wed, 21 Jan 2015 13:24:11 +0000 Subject: Mgv5: Remove blobgen. Remove crumble and wetness noises Add large pseudorandom caves below -256 De-link terrain level from water_level Cavegen: Mgv5 large cave code --- src/cavegen.cpp | 262 +++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 260 insertions(+), 2 deletions(-) (limited to 'src/cavegen.cpp') diff --git a/src/cavegen.cpp b/src/cavegen.cpp index 22bf03d17..6010780e9 100644 --- a/src/cavegen.cpp +++ b/src/cavegen.cpp @@ -20,6 +20,7 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "util/numeric.h" #include "map.h" #include "mapgen.h" +#include "mapgen_v5.h" #include "mapgen_v6.h" #include "mapgen_v7.h" #include "cavegen.h" @@ -279,6 +280,7 @@ void CaveV6::carveRoute(v3f vec, float f, bool randomize_xz) { ///////////////////////////////////////// Caves V7 + CaveV7::CaveV7(MapgenV7 *mg, PseudoRandom *ps, bool is_large_cave) { this->mg = mg; this->vm = mg->vm; @@ -431,7 +433,7 @@ void CaveV7::makeTunnel(bool dirswitch) { 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) { + 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) @@ -442,7 +444,7 @@ void CaveV7::makeTunnel(bool dirswitch) { 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) { + 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) @@ -581,3 +583,259 @@ void CaveV7::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) { } } } + + +///////////////////////////////////////// Caves V5 + + +CaveV5::CaveV5(MapgenV5 *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 CaveV5::makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height) { + node_min = nmin; + node_max = nmax; + 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 CaveV5::makeTunnel(bool dirswitch) { + + // Randomize size + s16 min_d = min_tunnel_diameter; + s16 max_d = max_tunnel_diameter; + rs = ps->range(min_d, max_d); + + 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 * 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 + ); + + // Do not make large 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->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) * mg->ystride + (p.X - node_min.X); + s16 h = mg->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); + + // Make a ravine every once in a while if it's long enough + //float xylen = vec.X * vec.X + vec.Z * vec.Z; + //disable ravines for now + bool is_ravine = false; //(xylen > 500.0) && !large_cave && (ps->range(1, 8) == 1); + + // Carve routes + for (float f = 0; f < 1.0; f += 1.0 / veclen) + carveRoute(vec, f, randomize_xz, is_ravine); + + orp = rp; +} + + +void CaveV5::carveRoute(v3f vec, float f, bool randomize_xz, bool is_ravine) { + MapNode airnode(CONTENT_AIR); + MapNode waternode(c_water_source); + MapNode lavanode(c_lava_source); + + v3s16 startp(orp.X, orp.Y, orp.Z); + startp += of; + + float nval = NoisePerlin3D(np_caveliquids, startp.X, + startp.Y, startp.Z, mg->seed); + MapNode liquidnode = nval < 0.40 ? lavanode : waternode; + + v3f fp = orp + vec * f; + fp.X += 0.1 * ps->range(-10, 10); + fp.Z += 0.1 * ps->range(-10, 10); + v3s16 cp(fp.X, fp.Y, fp.Z); + + s16 d0 = -rs/2; + s16 d1 = d0 + rs; + if (randomize_xz) { + d0 += ps->range(-1, 1); + d1 += ps->range(-1, 1); + } + + bool should_make_cave_hole = ps->range(1, 10) == 1; + + for (s16 z0 = d0; z0 <= d1; z0++) { + s16 si = rs / 2 - MYMAX(0, abs(z0) - rs / 7 - 1); + for (s16 x0 = -si - ps->range(0,1); x0 <= si - 1 + ps->range(0,1); x0++) { + s16 maxabsxz = MYMAX(abs(x0), abs(z0)); + + s16 si2 = is_ravine ? MYMIN(ps->range(25, 26), ar.Y) : + rs / 2 - MYMAX(0, maxabsxz - rs / 7 - 1); + + for (s16 y0 = -si2; y0 <= si2; y0++) { + if (large_cave_is_flat) { + // Make large caves not so tall + if (rs > 7 && abs(y0) >= rs / 3) + continue; + } + + v3s16 p(cp.X + x0, cp.Y + y0, cp.Z + z0); + p += of; + + if (!is_ravine && mg->heightmap && should_make_cave_hole && + p.X <= node_max.X && p.Z <= node_max.Z) { + int maplen = node_max.X - node_min.X + 1; + int idx = (p.Z - node_min.Z) * maplen + (p.X - node_min.X); + if (p.Y >= mg->heightmap[idx] - 2) + continue; + } + + if (vm->m_area.contains(p) == false) + continue; + + u32 i = vm->m_area.index(p); + + // Don't replace air, water, lava, or ice + content_t c = vm->m_data[i].getContent(); + if (!ndef->get(c).is_ground_content || c == CONTENT_AIR || + c == c_water_source || c == c_lava_source || c == c_ice) + 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; + } + } + } +} + -- cgit v1.2.3