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Diffstat (limited to 'src/mg_ore.cpp')
| -rw-r--r-- | src/mg_ore.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/mg_ore.cpp b/src/mg_ore.cpp new file mode 100644 index 000000000..c8d224dc6 --- /dev/null +++ b/src/mg_ore.cpp @@ -0,0 +1,161 @@ +/* +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 "util/numeric.h" +#include "map.h" +#include "log.h" + + +FlagDesc flagdesc_ore[] = { + {"absheight", OREFLAG_ABSHEIGHT}, + {"scatter_noisedensity", OREFLAG_DENSITY}, + {"claylike_nodeisnt", OREFLAG_NODEISNT}, + {NULL, 0} +}; + +/////////////////////////////////////////////////////////////////////////////// + + +Ore *createOre(OreType type) +{ + switch (type) { + case ORE_SCATTER: + return new OreScatter; + case ORE_SHEET: + return new OreSheet; + //case ORE_CLAYLIKE: //TODO: implement this! + // return new OreClaylike; + default: + return NULL; + } +} + + +Ore::~Ore() +{ + delete np; + delete noise; +} + + +void Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) +{ + int in_range = 0; + + in_range |= (nmin.Y <= height_max && nmax.Y >= height_min); + if (flags & OREFLAG_ABSHEIGHT) + in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1; + if (!in_range) + return; + + int ymin, ymax; + if (in_range & ORE_RANGE_MIRROR) { + ymin = MYMAX(nmin.Y, -height_max); + ymax = MYMIN(nmax.Y, -height_min); + } else { + ymin = MYMAX(nmin.Y, height_min); + ymax = MYMIN(nmax.Y, height_max); + } + if (clust_size >= ymax - ymin + 1) + return; + + nmin.Y = ymin; + nmax.Y = ymax; + generate(mg->vm, mg->seed, blockseed, nmin, nmax); +} + + +void OreScatter::generate(ManualMapVoxelManipulator *vm, int seed, + u32 blockseed, v3s16 nmin, v3s16 nmax) +{ + PseudoRandom pr(blockseed); + MapNode n_ore(c_ore, 0, ore_param2); + + int volume = (nmax.X - nmin.X + 1) * + (nmax.Y - nmin.Y + 1) * + (nmax.Z - nmin.Z + 1); + int csize = clust_size; + int orechance = (csize * csize * csize) / clust_num_ores; + int nclusters = volume / clust_scarcity; + + for (int 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 (np && (NoisePerlin3D(np, x0, y0, z0, seed) < nthresh)) + continue; + + for (int z1 = 0; z1 != csize; z1++) + for (int y1 = 0; y1 != csize; y1++) + for (int x1 = 0; x1 != csize; x1++) { + if (pr.range(1, orechance) != 1) + 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(ManualMapVoxelManipulator *vm, int seed, + u32 blockseed, v3s16 nmin, v3s16 nmax) +{ + PseudoRandom pr(blockseed + 4234); + MapNode n_ore(c_ore, 0, ore_param2); + + int max_height = clust_size; + int y_start = pr.range(nmin.Y, nmax.Y - max_height); + + 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 = seed + y_start; + noise->perlinMap2D(nmin.X, nmin.Z); + + int index = 0; + for (int z = nmin.Z; z <= nmax.Z; z++) + for (int x = nmin.X; x <= nmax.X; x++) { + float noiseval = noise->result[index++]; + if (noiseval < nthresh) + continue; + + int height = max_height * (1. / pr.range(1, 3)); + int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1; + int y1 = y0 + height; + 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; + } + } +} + |