From 9e811a92e7846b958e4bc84aeb30bad8b51e8e1d Mon Sep 17 00:00:00 2001 From: kwolekr Date: Sat, 1 Nov 2014 13:16:23 -0400 Subject: Split up mapgen.cpp --- src/mg_decoration.cpp | 275 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 275 insertions(+) create mode 100644 src/mg_decoration.cpp (limited to 'src/mg_decoration.cpp') diff --git a/src/mg_decoration.cpp b/src/mg_decoration.cpp new file mode 100644 index 000000000..7f6126bfc --- /dev/null +++ b/src/mg_decoration.cpp @@ -0,0 +1,275 @@ +/* +Minetest +Copyright (C) 2010-2014 kwolekr, Ryan Kwolek + +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 "map.h" +#include "log.h" +#include "util/numeric.h" + +/////////////////////////////////////////////////////////////////////////////// + + +Decoration *createDecoration(DecorationType type) +{ + switch (type) { + case DECO_SIMPLE: + return new DecoSimple; + case DECO_SCHEMATIC: + return new DecoSchematic; + //case DECO_LSYSTEM: + // return new DecoLSystem; + default: + return NULL; + } +} + + +Decoration::Decoration() +{ + mapseed = 0; + np = NULL; + fill_ratio = 0; + sidelen = 1; +} + + +Decoration::~Decoration() +{ + delete np; +} + + +void Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) +{ + PseudoRandom ps(blockseed + 53); + int carea_size = nmax.X - nmin.X + 1; + + // Divide area into parts + if (carea_size % sidelen) { + errorstream << "Decoration::placeDeco: chunk size is not divisible by " + "sidelen; setting sidelen to " << carea_size << std::endl; + 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 = np ? + NoisePerlin2D(np, p2d_center.X, p2d_center.Y, mapseed) : + fill_ratio; + u32 deco_count = area * MYMAX(nval, 0.f); + + 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 = mg->heightmap ? + mg->heightmap[mapindex] : + mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y); + + if (y < nmin.Y || y > nmax.Y) + continue; + + int height = getHeight(); + int max_y = nmax.Y;// + MAP_BLOCKSIZE - 1; + if (y + 1 + height > max_y) { + continue; +#if 0 + printf("Decoration at (%d %d %d) cut off\n", x, y, z); + //add to queue + JMutexAutoLock cutofflock(cutoff_mutex); + cutoffs.push_back(CutoffData(x, y, z, height)); +#endif + } + + if (mg->biomemap) { + std::set::iterator iter; + + if (biomes.size()) { + iter = biomes.find(mg->biomemap[mapindex]); + if (iter == biomes.end()) + continue; + } + } + + generate(mg, &ps, max_y, v3s16(x, y, z)); + } + } +} + + +#if 0 +void Decoration::placeCutoffs(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) +{ + PseudoRandom pr(blockseed + 53); + std::vector handled_cutoffs; + + // Copy over the cutoffs we're interested in so we don't needlessly hold a lock + { + JMutexAutoLock cutofflock(cutoff_mutex); + for (std::list::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 + { + JMutexAutoLock cutofflock(cutoff_mutex); + for (std::list::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 + + +/////////////////////////////////////////////////////////////////////////////// + +bool DecoSimple::canPlaceDecoration(ManualMapVoxelManipulator *vm, v3s16 p) +{ + // Don't bother if there aren't any decorations to place + if (c_decos.size() == 0) + return false; + + u32 vi = vm->m_area.index(p); + + // Check if the decoration can be placed on this node + 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; + v3s16 dirs[8] = { + 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) + }; + + // Check a Moore neighborhood if there are 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; +} + + +void DecoSimple::generate(Mapgen *mg, PseudoRandom *pr, s16 max_y, v3s16 p) +{ + ManualMapVoxelManipulator *vm = mg->vm; + + if (!canPlaceDecoration(vm, p)) + return; + + 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; + + height = MYMIN(height, max_y - p.Y); + + 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) + break; + + vm->m_data[vi] = MapNode(c_place); + } +} + + +int DecoSimple::getHeight() +{ + return (deco_height_max > 0) ? deco_height_max : deco_height; +} + + +std::string DecoSimple::getName() +{ + return ""; +} -- cgit v1.2.3