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- /*
- Minetest
- Copyright (C) 2014-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
- Copyright (C) 2015-2018 paramat
- 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 "map.h"
- #include "log.h"
- #include "util/numeric.h"
- #include <algorithm>
- FlagDesc flagdesc_ore[] = {
- {"absheight", OREFLAG_ABSHEIGHT}, // Non-functional
- {"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 (ObjDef *object : m_objects) {
- Ore *ore = (Ore *) object;
- delete ore;
- }
- m_objects.clear();
- }
- ///////////////////////////////////////////////////////////////////////////////
- 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)
- {
- if (nmin.Y > y_max || nmax.Y < y_min)
- return 0;
- int actual_ymin = MYMAX(nmin.Y, y_min);
- int 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);
- std::unordered_set<u8>::const_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()) {
- std::unordered_set<u8>::const_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()
- {
- 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()) {
- std::unordered_set<u8>::const_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);
- std::unordered_set<u8>::const_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 -= std::sqrt(xdist * xdist + ydist * ydist + zdist * zdist) / csize;
- if (noiseval < nthresh)
- continue;
- vm->m_data[i] = n_ore;
- }
- }
- }
- ///////////////////////////////////////////////////////////////////////////////
- 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);
- int sizex = nmax.X - nmin.X + 1;
- int sizey = nmax.Y - nmin.Y + 1;
- // Because this ore uses 3D noise the perlinmap Y size can be different in
- // different mapchunks due to ore Y limits. So recreate the noise objects
- // if Y size has changed.
- // Because these noise objects are created multiple times for this ore type
- // it is necessary to 'delete' them here.
- if (!noise || sizey != sizey_prev) {
- delete noise;
- delete noise2;
- int sizez = nmax.Z - nmin.Z + 1;
- noise = new Noise(&np, mapseed, sizex, sizey, sizez);
- noise2 = new Noise(&np, mapseed + 436, sizex, sizey, sizez);
- sizey_prev = sizey;
- }
- bool noise_generated = false;
- size_t index = 0;
- for (int z = nmin.Z; z <= nmax.Z; z++)
- for (int y = nmin.Y; y <= nmax.Y; y++)
- for (int x = nmin.X; x <= nmax.X; x++, index++) {
- 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;
- if (biomemap && !biomes.empty()) {
- u32 bmapidx = sizex * (z - nmin.Z) + (x - nmin.X);
- std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[bmapidx]);
- if (it == biomes.end())
- continue;
- }
- // Same lazy generation optimization as in OreBlob
- if (!noise_generated) {
- noise_generated = true;
- noise->perlinMap3D(nmin.X, nmin.Y, nmin.Z);
- noise2->perlinMap3D(nmin.X, nmin.Y, nmin.Z);
- }
- // randval ranges from -1..1
- float randval = (float)pr.next() / (pr.RANDOM_RANGE / 2) - 1.f;
- float noiseval = contour(noise->result[index]);
- float noiseval2 = contour(noise2->result[index]);
- if (noiseval * noiseval2 + randval * random_factor < nthresh)
- continue;
- vm->m_data[i] = n_ore;
- }
- }
- ///////////////////////////////////////////////////////////////////////////////
- OreStratum::~OreStratum()
- {
- delete noise_stratum_thickness;
- }
- void OreStratum::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);
- if (flags & OREFLAG_USE_NOISE) {
- if (!noise) {
- int sx = nmax.X - nmin.X + 1;
- int sz = nmax.Z - nmin.Z + 1;
- noise = new Noise(&np, 0, sx, sz);
- }
- noise->perlinMap2D(nmin.X, nmin.Z);
- }
- if (flags & OREFLAG_USE_NOISE2) {
- if (!noise_stratum_thickness) {
- int sx = nmax.X - nmin.X + 1;
- int sz = nmax.Z - nmin.Z + 1;
- noise_stratum_thickness = new Noise(&np_stratum_thickness, 0, sx, sz);
- }
- noise_stratum_thickness->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++) {
- if (biomemap && !biomes.empty()) {
- std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[index]);
- if (it == biomes.end())
- continue;
- }
- int y0;
- int y1;
- if (flags & OREFLAG_USE_NOISE) {
- float nhalfthick = ((flags & OREFLAG_USE_NOISE2) ?
- noise_stratum_thickness->result[index] : (float)stratum_thickness) /
- 2.0f;
- float nmid = noise->result[index];
- y0 = MYMAX(nmin.Y, std::ceil(nmid - nhalfthick));
- y1 = MYMIN(nmax.Y, nmid + nhalfthick);
- } else { // Simple horizontal stratum
- y0 = nmin.Y;
- y1 = nmax.Y;
- }
- for (int y = y0; y <= y1; y++) {
- if (pr.range(1, clust_scarcity) != 1)
- continue;
- 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;
- }
- }
- }
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