advtrains.git - Advtrains mod for minetest.

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/* Minetest Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net> This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "mg_ore.h" #include "mapgen.h" #include "noise.h" #include "util/numeric.h" #include "map.h" #include "log.h" FlagDesc flagdesc_ore[] = { {"absheight", OREFLAG_ABSHEIGHT}, {"puff_cliffs", OREFLAG_PUFF_CLIFFS}, {"puff_additive_composition", OREFLAG_PUFF_ADDITIVE}, {NULL, 0} }; /////////////////////////////////////////////////////////////////////////////// OreManager::OreManager(IGameDef *gamedef) : ObjDefManager(gamedef, OBJDEF_ORE) { } size_t OreManager::placeAllOres(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) { size_t nplaced = 0; for (size_t i = 0; i != m_objects.size(); i++) { Ore *ore = (Ore *)m_objects[i]; if (!ore) continue; nplaced += ore->placeOre(mg, blockseed, nmin, nmax); blockseed++; } return nplaced; } void OreManager::clear() { for (size_t i = 0; i < m_objects.size(); i++) { Ore *ore = (Ore *)m_objects[i]; delete ore; } m_objects.clear(); } /////////////////////////////////////////////////////////////////////////////// Ore::Ore() { flags = 0; noise = NULL; } Ore::~Ore() { delete noise; } void Ore::resolveNodeNames() { getIdFromNrBacklog(&c_ore, "", CONTENT_AIR); getIdsFromNrBacklog(&c_wherein); } size_t Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) { int in_range = 0; in_range |= (nmin.Y <= y_max && nmax.Y >= y_min); if (flags & OREFLAG_ABSHEIGHT) in_range |= (nmin.Y >= -y_max && nmax.Y <= -y_min) << 1; if (!in_range) return 0; int actual_ymin, actual_ymax; if (in_range & ORE_RANGE_MIRROR) { actual_ymin = MYMAX(nmin.Y, -y_max); actual_ymax = MYMIN(nmax.Y, -y_min); } else { actual_ymin = MYMAX(nmin.Y, y_min); actual_ymax = MYMIN(nmax.Y, y_max); } if (clust_size >= actual_ymax - actual_ymin + 1) return 0; nmin.Y = actual_ymin; nmax.Y = actual_ymax; generate(mg->vm, mg->seed, blockseed, nmin, nmax, mg->biomemap); return 1; } /////////////////////////////////////////////////////////////////////////////// void OreScatter::generate(MMVManip *vm, int mapseed, u32 blockseed, v3s16 nmin, v3s16 nmax, u8 *biomemap) { PcgRandom pr(blockseed); MapNode n_ore(c_ore, 0, ore_param2); u32 sizex = (nmax.X - nmin.X + 1); u32 volume = (nmax.X - nmin.X + 1) * (nmax.Y - nmin.Y + 1) * (nmax.Z - nmin.Z + 1); u32 csize = clust_size; u32 cvolume = csize * csize * csize; u32 nclusters = volume / clust_scarcity; for (u32 i = 0; i != nclusters; i++) { int x0 = pr.range(nmin.X, nmax.X - csize + 1); int y0 = pr.range(nmin.Y, nmax.Y - csize + 1); int z0 = pr.range(nmin.Z, nmax.Z - csize + 1); if ((flags & OREFLAG_USE_NOISE) && (NoisePerlin3D(&np, x0, y0, z0, mapseed) < nthresh)) continue; if (biomemap && !biomes.empty()) { u32 index = sizex * (z0 - nmin.Z) + (x0 - nmin.X); UNORDERED_SET<u8>::iterator it = biomes.find(biomemap[index]); if (it == biomes.end()) continue; } for (u32 z1 = 0; z1 != csize; z1++) for (u32 y1 = 0; y1 != csize; y1++) for (u32 x1 = 0; x1 != csize; x1++) { if (pr.range(1, cvolume) > clust_num_ores) continue; u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1); if (!CONTAINS(c_wherein, vm->m_data[i].getContent())) continue; vm->m_data[i] = n_ore; } } } /////////////////////////////////////////////////////////////////////////////// void OreSheet::generate(MMVManip *vm, int mapseed, u32 blockseed, v3s16 nmin, v3s16 nmax, u8 *biomemap) { PcgRandom pr(blockseed + 4234); MapNode n_ore(c_ore, 0, ore_param2); u16 max_height = column_height_max; int y_start_min = nmin.Y + max_height; int y_start_max = nmax.Y - max_height; int y_start = y_start_min < y_start_max ? pr.range(y_start_min, y_start_max) : (y_start_min + y_start_max) / 2; if (!noise) { int sx = nmax.X - nmin.X + 1; int sz = nmax.Z - nmin.Z + 1; noise = new Noise(&np, 0, sx, sz); } noise->seed = mapseed + y_start; noise->perlinMap2D(nmin.X, nmin.Z); size_t index = 0; for (int z = nmin.Z; z <= nmax.Z; z++) for (int x = nmin.X; x <= nmax.X; x++, index++) { float noiseval = noise->result[index]; if (noiseval < nthresh) continue; if (biomemap && !biomes.empty()) { UNORDERED_SET<u8>::iterator it = biomes.find(biomemap[index]); if (it == biomes.end()) continue; } u16 height = pr.range(column_height_min, column_height_max); int ymidpoint = y_start + noiseval; int y0 = MYMAX(nmin.Y, ymidpoint - height * (1 - column_midpoint_factor)); int y1 = MYMIN(nmax.Y, y0 + height - 1); for (int y = y0; y <= y1; y++) { u32 i = vm->m_area.index(x, y, z); if (!vm->m_area.contains(i)) continue; if (!CONTAINS(c_wherein, vm->m_data[i].getContent())) continue; vm->m_data[i] = n_ore; } } } /////////////////////////////////////////////////////////////////////////////// OrePuff::OrePuff() : Ore() { noise_puff_top = NULL; noise_puff_bottom = NULL; } OrePuff::~OrePuff() { delete noise_puff_top; delete noise_puff_bottom; } void OrePuff::generate(MMVManip *vm, int mapseed, u32 blockseed, v3s16 nmin, v3s16 nmax, u8 *biomemap) { PcgRandom pr(blockseed + 4234); MapNode n_ore(c_ore, 0, ore_param2); int y_start = pr.range(nmin.Y, nmax.Y); if (!noise) { int sx = nmax.X - nmin.X + 1; int sz = nmax.Z - nmin.Z + 1; noise = new Noise(&np, 0, sx, sz); noise_puff_top = new Noise(&np_puff_top, 0, sx, sz); noise_puff_bottom = new Noise(&np_puff_bottom, 0, sx, sz); } noise->seed = mapseed + y_start; noise->perlinMap2D(nmin.X, nmin.Z); bool noise_generated = false; size_t index = 0; for (int z = nmin.Z; z <= nmax.Z; z++) for (int x = nmin.X; x <= nmax.X; x++, index++) { float noiseval = noise->result[index]; if (noiseval < nthresh) continue; if (biomemap && !biomes.empty()) { UNORDERED_SET<u8>::iterator it = biomes.find(biomemap[index]); if (it == biomes.end()) continue; } if (!noise_generated) { noise_generated = true; noise_puff_top->perlinMap2D(nmin.X, nmin.Z); noise_puff_bottom->perlinMap2D(nmin.X, nmin.Z); } float ntop = noise_puff_top->result[index]; float nbottom = noise_puff_bottom->result[index]; if (!(flags & OREFLAG_PUFF_CLIFFS)) { float ndiff = noiseval - nthresh; if (ndiff < 1.0f) { ntop *= ndiff; nbottom *= ndiff; } } int ymid = y_start; int y0 = ymid - nbottom; int y1 = ymid + ntop; if ((flags & OREFLAG_PUFF_ADDITIVE) && (y0 > y1)) SWAP(int, y0, y1); for (int y = y0; y <= y1; y++) { u32 i = vm->m_area.index(x, y, z); if (!vm->m_area.contains(i)) continue; if (!CONTAINS(c_wherein, vm->m_data[i].getContent())) continue; vm->m_data[i] = n_ore; } } } /////////////////////////////////////////////////////////////////////////////// void OreBlob::generate(MMVManip *vm, int mapseed, u32 blockseed, v3s16 nmin, v3s16 nmax, u8 *biomemap) { PcgRandom pr(blockseed + 2404); MapNode n_ore(c_ore, 0, ore_param2); u32 sizex = (nmax.X - nmin.X + 1); u32 volume = (nmax.X - nmin.X + 1) * (nmax.Y - nmin.Y + 1) * (nmax.Z - nmin.Z + 1); u32 csize = clust_size; u32 nblobs = volume / clust_scarcity; if (!noise) noise = new Noise(&np, mapseed, csize, csize, csize); for (u32 i = 0; i != nblobs; i++) { int x0 = pr.range(nmin.X, nmax.X - csize + 1); int y0 = pr.range(nmin.Y, nmax.Y - csize + 1); int z0 = pr.range(nmin.Z, nmax.Z - csize + 1); if (biomemap && !biomes.empty()) { u32 bmapidx = sizex * (z0 - nmin.Z) + (x0 - nmin.X); UNORDERED_SET<u8>::iterator it = biomes.find(biomemap[bmapidx]); if (it == biomes.end()) continue; } bool noise_generated = false; noise->seed = blockseed + i; size_t index = 0; for (u32 z1 = 0; z1 != csize; z1++) for (u32 y1 = 0; y1 != csize; y1++) for (u32 x1 = 0; x1 != csize; x1++, index++) { u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1); if (!CONTAINS(c_wherein, vm->m_data[i].getContent())) continue; // Lazily generate noise only if there's a chance of ore being placed // This simple optimization makes calls 6x faster on average if (!noise_generated) { noise_generated = true; noise->perlinMap3D(x0, y0, z0); } float noiseval = noise->result[index]; float xdist = (s32)x1 - (s32)csize / 2; float ydist = (s32)y1 - (s32)csize / 2; float zdist = (s32)z1 - (s32)csize / 2; noiseval -= (sqrt(xdist * xdist + ydist * ydist + zdist * zdist) / csize); if (noiseval < nthresh) continue; vm->m_data[i] = n_ore; } } } /////////////////////////////////////////////////////////////////////////////// OreVein::OreVein() : Ore() { noise2 = NULL; } OreVein::~OreVein() { delete noise2; } void OreVein::generate(MMVManip *vm, int mapseed, u32 blockseed, v3s16 nmin, v3s16 nmax, u8 *biomemap) { PcgRandom pr(blockseed + 520); MapNode n_ore(c_ore, 0, ore_param2); u32 sizex = (nmax.X - nmin.X + 1); if (!noise) { int sx = nmax.X - nmin.X + 1;


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