From 87bc39dca733a2cc805bc1071794c4d5d7937115 Mon Sep 17 00:00:00 2001 From: kwolekr Date: Mon, 2 May 2016 02:24:57 -0400 Subject: Mapgen: Combine generateBiomes, dustTopNodes, and generateCaves This commit condenses the above methods into a single implementation used by V7, V5, Flat, Fractal, and Valleys mapgens and introduces MapgenBasic. --- src/mapgen.cpp | 236 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 236 insertions(+) (limited to 'src/mapgen.cpp') diff --git a/src/mapgen.cpp b/src/mapgen.cpp index e269bf454..f491ed9eb 100644 --- a/src/mapgen.cpp +++ b/src/mapgen.cpp @@ -39,6 +39,7 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "util/numeric.h" #include "filesys.h" #include "log.h" +#include "cavegen.h" FlagDesc flagdesc_mapgen[] = { {"trees", MG_TREES}, @@ -369,6 +370,241 @@ void Mapgen::spreadLight(v3s16 nmin, v3s16 nmax) } +//// +//// MapgenBasic +//// + +MapgenBasic::MapgenBasic(int mapgenid, MapgenParams *params, EmergeManager *emerge) + : Mapgen(mapgenid, params, emerge) +{ + +} + +MgStoneType MapgenBasic::generateBiomes() +{ + v3s16 em = vm->m_area.getExtent(); + u32 index = 0; + 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; + u16 depth_top = 0; + u16 base_filler = 0; + u16 depth_water_top = 0; + u32 vi = 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 || c_above == c_river_water_source); + + // 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[vi].getContent(); + + // 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 || c == c_river_water_source) + && (air_above || !biome))) { + biome = biomegen->getBiomeAtIndex(index, y); + + depth_top = biome->depth_top; + base_filler = MYMAX(depth_top + + biome->depth_filler + + noise_filler_depth->result[index], 0.f); + 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) + stone_type = DESERT_STONE; + else if (biome->c_stone == c_sandstone) + stone_type = SANDSTONE; + } + + 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 + || c_below == c_river_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); + } + + air_above = false; + water_above = false; + } else if (c == c_water_source) { + 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 == c_river_water_source) { + vm->m_data[vi] = MapNode(biome->c_river_water); + nplaced = depth_top; // Enable filler placement for next surface + air_above = false; + water_above = true; + } else if (c == CONTENT_AIR) { + 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, vi, -1); + } + } + + return stone_type; +} + + +void MapgenBasic::dustTopNodes() +{ + if (node_max.Y < water_level) + return; + + v3s16 em = vm->m_area.getExtent(); + u32 index = 0; + + 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 = (Biome *)bmgr->getRaw(biomemap[index]); + + if (biome->c_dust == CONTENT_IGNORE) + continue; + + u32 vi = vm->m_area.index(x, full_node_max.Y, z); + content_t c_full_max = vm->m_data[vi].getContent(); + s16 y_start; + + if (c_full_max == CONTENT_AIR) { + y_start = full_node_max.Y - 1; + } else if (c_full_max == CONTENT_IGNORE) { + vi = vm->m_area.index(x, node_max.Y + 1, z); + content_t c_max = vm->m_data[vi].getContent(); + + if (c_max == CONTENT_AIR) + y_start = node_max.Y; + else + continue; + } else { + continue; + } + + vi = vm->m_area.index(x, y_start, z); + for (s16 y = y_start; y >= node_min.Y - 1; y--) { + if (vm->m_data[vi].getContent() != CONTENT_AIR) + break; + + vm->m_area.add_y(em, vi, -1); + } + + content_t c = vm->m_data[vi].getContent(); + if (!ndef->get(c).buildable_to && c != CONTENT_IGNORE && c != biome->c_dust) { + vm->m_area.add_y(em, vi, 1); + vm->m_data[vi] = MapNode(biome->c_dust); + } + } +} + + +void MapgenBasic::generateCaves(s16 max_stone_y, s16 large_cave_depth) +{ + 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 + 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 > cave_width && 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 > 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); ////caves version varies ---- todo- fix this! + cave.makeCave(node_min, node_max, max_stone_y); + } +} + + //// //// GenerateNotifier //// -- cgit v1.2.3