diff options
Diffstat (limited to 'src/mapgen_v5.cpp')
| -rw-r--r-- | src/mapgen_v5.cpp | 122 |
1 files changed, 75 insertions, 47 deletions
diff --git a/src/mapgen_v5.cpp b/src/mapgen_v5.cpp index e9b1b58b3..5ae2568ae 100644 --- a/src/mapgen_v5.cpp +++ b/src/mapgen_v5.cpp @@ -54,7 +54,8 @@ MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge) // 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]; @@ -70,9 +71,11 @@ MapgenV5::MapgenV5(int mapgenid, MapgenParams *params, EmergeManager *emerge) noise_height = new Noise(&sp->np_height, 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); + // 1-up 1-down overgeneration noise_ground = new Noise(&sp->np_ground, 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); @@ -505,50 +508,6 @@ MgStoneType MapgenV5::generateBiomes(float *heat_map, float *humidity_map) } -void MapgenV5::generateCaves(int 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); - - 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++) { - // 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. - if (y > node_max.Y) - continue; - - float d1 = contour(noise_cave1->result[index]); - float d2 = contour(noise_cave2->result[index]); - if (d1 * d2 > 0.125f) { - 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 > MGV5_LARGE_CAVE_DEPTH) - return; - - PseudoRandom ps(blockseed + 21343); - u32 bruises_count = ps.range(0, 2); - for (u32 i = 0; i < bruises_count; i++) { - CaveV5 cave(this, &ps); - cave.makeCave(node_min, node_max, max_stone_y); - } -} - - void MapgenV5::dustTopNodes() { if (node_max.Y < water_level) @@ -597,3 +556,72 @@ void MapgenV5::dustTopNodes() } } } + + +void MapgenV5::generateCaves(int 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 > 0.125f && 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_max.Y > MGV5_LARGE_CAVE_DEPTH) + return; + + PseudoRandom ps(blockseed + 21343); + u32 bruises_count = ps.range(0, 2); + for (u32 i = 0; i < bruises_count; i++) { + CaveV5 cave(this, &ps); + cave.makeCave(node_min, node_max, max_stone_y); + } +} |