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- /*
- Minetest
- Copyright (C) 2014-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
- Copyright (C) 2015-2017 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_decoration.h"
- #include "mg_schematic.h"
- #include "mapgen.h"
- #include "noise.h"
- #include "map.h"
- #include "log.h"
- #include "util/numeric.h"
- #include <algorithm>
- FlagDesc flagdesc_deco[] = {
- {"place_center_x", DECO_PLACE_CENTER_X},
- {"place_center_y", DECO_PLACE_CENTER_Y},
- {"place_center_z", DECO_PLACE_CENTER_Z},
- {"force_placement", DECO_FORCE_PLACEMENT},
- {"liquid_surface", DECO_LIQUID_SURFACE},
- {NULL, 0}
- };
- ///////////////////////////////////////////////////////////////////////////////
- DecorationManager::DecorationManager(IGameDef *gamedef) :
- ObjDefManager(gamedef, OBJDEF_DECORATION)
- {
- }
- size_t DecorationManager::placeAllDecos(Mapgen *mg, u32 blockseed,
- v3s16 nmin, v3s16 nmax, s16 deco_zero_level)
- {
- size_t nplaced = 0;
- for (size_t i = 0; i != m_objects.size(); i++) {
- Decoration *deco = (Decoration *)m_objects[i];
- if (!deco)
- continue;
- nplaced += deco->placeDeco(mg, blockseed, nmin, nmax, deco_zero_level);
- blockseed++;
- }
- return nplaced;
- }
- ///////////////////////////////////////////////////////////////////////////////
- void Decoration::resolveNodeNames()
- {
- getIdsFromNrBacklog(&c_place_on);
- getIdsFromNrBacklog(&c_spawnby);
- }
- bool Decoration::canPlaceDecoration(MMVManip *vm, v3s16 p)
- {
- // Check if the decoration can be placed on this node
- u32 vi = vm->m_area.index(p);
- if (!CONTAINS(c_place_on, vm->m_data[vi].getContent()))
- return false;
- // Don't continue if there are no spawnby constraints
- if (nspawnby == -1)
- return true;
- int nneighs = 0;
- static const v3s16 dirs[16] = {
- v3s16( 0, 0, 1),
- v3s16( 0, 0, -1),
- v3s16( 1, 0, 0),
- v3s16(-1, 0, 0),
- v3s16( 1, 0, 1),
- v3s16(-1, 0, 1),
- v3s16(-1, 0, -1),
- v3s16( 1, 0, -1),
- v3s16( 0, 1, 1),
- v3s16( 0, 1, -1),
- v3s16( 1, 1, 0),
- v3s16(-1, 1, 0),
- v3s16( 1, 1, 1),
- v3s16(-1, 1, 1),
- v3s16(-1, 1, -1),
- v3s16( 1, 1, -1)
- };
- // Check these 16 neighbouring nodes for enough spawnby nodes
- for (size_t i = 0; i != ARRLEN(dirs); i++) {
- u32 index = vm->m_area.index(p + dirs[i]);
- if (!vm->m_area.contains(index))
- continue;
- if (CONTAINS(c_spawnby, vm->m_data[index].getContent()))
- nneighs++;
- }
- if (nneighs < nspawnby)
- return false;
- return true;
- }
- size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed,
- v3s16 nmin, v3s16 nmax, s16 deco_zero_level)
- {
- // Decoration y_min / y_max is displaced by deco_zero_level or remains
- // unchanged. Any decoration with a limit at +-MAX_MAP_GENERATION_LIMIT is
- // considered to have that limit at +-infinity, so we do not alter that limit.
- s32 y_min_disp = (y_min <= -MAX_MAP_GENERATION_LIMIT) ?
- -MAX_MAP_GENERATION_LIMIT : y_min + deco_zero_level;
- s32 y_max_disp = (y_max >= MAX_MAP_GENERATION_LIMIT) ?
- MAX_MAP_GENERATION_LIMIT : y_max + deco_zero_level;
- PcgRandom ps(blockseed + 53);
- int carea_size = nmax.X - nmin.X + 1;
- // Divide area into parts
- // If chunksize is changed it may no longer be divisable by sidelen
- if (carea_size % sidelen)
- sidelen = carea_size;
- s16 divlen = carea_size / sidelen;
- int area = sidelen * sidelen;
- for (s16 z0 = 0; z0 < divlen; z0++)
- for (s16 x0 = 0; x0 < divlen; x0++) {
- v2s16 p2d_center( // Center position of part of division
- nmin.X + sidelen / 2 + sidelen * x0,
- nmin.Z + sidelen / 2 + sidelen * z0
- );
- v2s16 p2d_min( // Minimum edge of part of division
- nmin.X + sidelen * x0,
- nmin.Z + sidelen * z0
- );
- v2s16 p2d_max( // Maximum edge of part of division
- nmin.X + sidelen + sidelen * x0 - 1,
- nmin.Z + sidelen + sidelen * z0 - 1
- );
- // Amount of decorations
- float nval = (flags & DECO_USE_NOISE) ?
- NoisePerlin2D(&np, p2d_center.X, p2d_center.Y, mapseed) :
- fill_ratio;
- u32 deco_count = 0;
- float deco_count_f = (float)area * nval;
- if (deco_count_f >= 1.f) {
- deco_count = deco_count_f;
- } else if (deco_count_f > 0.f) {
- // For low density decorations calculate a chance for 1 decoration
- if (ps.range(1000) <= deco_count_f * 1000.f)
- deco_count = 1;
- }
- for (u32 i = 0; i < deco_count; i++) {
- s16 x = ps.range(p2d_min.X, p2d_max.X);
- s16 z = ps.range(p2d_min.Y, p2d_max.Y);
- int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
- s16 y = -MAX_MAP_GENERATION_LIMIT;
- if (flags & DECO_LIQUID_SURFACE)
- y = mg->findLiquidSurface(v2s16(x, z), nmin.Y, nmax.Y);
- else if (mg->heightmap)
- y = mg->heightmap[mapindex];
- else
- y = mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
- if (y < y_min_disp || y > y_max_disp || y < nmin.Y || y > nmax.Y)
- continue;
- if (y + getHeight() > mg->vm->m_area.MaxEdge.Y) {
- continue;
- #if 0
- printf("Decoration at (%d %d %d) cut off\n", x, y, z);
- //add to queue
- MutexAutoLock cutofflock(cutoff_mutex);
- cutoffs.push_back(CutoffData(x, y, z, height));
- #endif
- }
- if (mg->biomemap && !biomes.empty()) {
- std::unordered_set<u8>::const_iterator iter =
- biomes.find(mg->biomemap[mapindex]);
- if (iter == biomes.end())
- continue;
- }
- v3s16 pos(x, y, z);
- if (generate(mg->vm, &ps, pos))
- mg->gennotify.addEvent(GENNOTIFY_DECORATION, pos, index);
- }
- }
- return 0;
- }
- #if 0
- void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
- {
- PcgRandom pr(blockseed + 53);
- std::vector<CutoffData> handled_cutoffs;
- // Copy over the cutoffs we're interested in so we don't needlessly hold a lock
- {
- MutexAutoLock cutofflock(cutoff_mutex);
- for (std::list<CutoffData>::iterator i = cutoffs.begin();
- i != cutoffs.end(); ++i) {
- CutoffData cutoff = *i;
- v3s16 p = cutoff.p;
- s16 height = cutoff.height;
- if (p.X < nmin.X || p.X > nmax.X ||
- p.Z < nmin.Z || p.Z > nmax.Z)
- continue;
- if (p.Y + height < nmin.Y || p.Y > nmax.Y)
- continue;
- handled_cutoffs.push_back(cutoff);
- }
- }
- // Generate the cutoffs
- for (size_t i = 0; i != handled_cutoffs.size(); i++) {
- v3s16 p = handled_cutoffs[i].p;
- s16 height = handled_cutoffs[i].height;
- if (p.Y + height > nmax.Y) {
- //printf("Decoration at (%d %d %d) cut off again!\n", p.X, p.Y, p.Z);
- cuttoffs.push_back(v3s16(p.X, p.Y, p.Z));
- }
- generate(mg, &pr, nmax.Y, nmin.Y - p.Y, v3s16(p.X, nmin.Y, p.Z));
- }
- // Remove cutoffs that were handled from the cutoff list
- {
- MutexAutoLock cutofflock(cutoff_mutex);
- for (std::list<CutoffData>::iterator i = cutoffs.begin();
- i != cutoffs.end(); ++i) {
- for (size_t j = 0; j != handled_cutoffs.size(); j++) {
- CutoffData coff = *i;
- if (coff.p == handled_cutoffs[j].p)
- i = cutoffs.erase(i);
- }
- }
- }
- }
- #endif
- ///////////////////////////////////////////////////////////////////////////////
- void DecoSimple::resolveNodeNames()
- {
- Decoration::resolveNodeNames();
- getIdsFromNrBacklog(&c_decos);
- }
- size_t DecoSimple::generate(MMVManip *vm, PcgRandom *pr, v3s16 p)
- {
- // Don't bother if there aren't any decorations to place
- if (c_decos.empty())
- return 0;
- if (!canPlaceDecoration(vm, p))
- return 0;
- content_t c_place = c_decos[pr->range(0, c_decos.size() - 1)];
- s16 height = (deco_height_max > 0) ?
- pr->range(deco_height, deco_height_max) : deco_height;
- bool force_placement = (flags & DECO_FORCE_PLACEMENT);
- const v3s16 &em = vm->m_area.getExtent();
- u32 vi = vm->m_area.index(p);
- for (int i = 0; i < height; i++) {
- vm->m_area.add_y(em, vi, 1);
- content_t c = vm->m_data[vi].getContent();
- if (c != CONTENT_AIR && c != CONTENT_IGNORE &&
- !force_placement)
- break;
- vm->m_data[vi] = MapNode(c_place, 0, deco_param2);
- }
- return 1;
- }
- int DecoSimple::getHeight()
- {
- return (deco_height_max > 0) ? deco_height_max : deco_height;
- }
- ///////////////////////////////////////////////////////////////////////////////
- size_t DecoSchematic::generate(MMVManip *vm, PcgRandom *pr, v3s16 p)
- {
- // Schematic could have been unloaded but not the decoration
- // In this case generate() does nothing (but doesn't *fail*)
- if (schematic == NULL)
- return 0;
- if (!canPlaceDecoration(vm, p))
- return 0;
- if (flags & DECO_PLACE_CENTER_X)
- p.X -= (schematic->size.X - 1) / 2;
- if (flags & DECO_PLACE_CENTER_Y)
- p.Y -= (schematic->size.Y - 1) / 2;
- if (flags & DECO_PLACE_CENTER_Z)
- p.Z -= (schematic->size.Z - 1) / 2;
- Rotation rot = (rotation == ROTATE_RAND) ?
- (Rotation)pr->range(ROTATE_0, ROTATE_270) : rotation;
- bool force_placement = (flags & DECO_FORCE_PLACEMENT);
- schematic->blitToVManip(vm, p, rot, force_placement);
- return 1;
- }
- int DecoSchematic::getHeight()
- {
- // Account for a schematic being sunk into the ground by flag.
- // When placed normally account for how a schematic is placed
- // sunk 1 node into the ground.
- return (flags & DECO_PLACE_CENTER_Y) ?
- (schematic->size.Y - 1) / 2 : schematic->size.Y - 1;
- }
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