mirror of https://github.com/minetest/minetest.git
443 lines
13 KiB
C++
443 lines
13 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "mapgen.h"
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#include "voxel.h"
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#include "noise.h"
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#include "biome.h"
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#include "mapblock.h"
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#include "mapnode.h"
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#include "map.h"
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//#include "serverobject.h"
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#include "content_sao.h"
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#include "nodedef.h"
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#include "content_mapnode.h" // For content_mapnode_get_new_name
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#include "voxelalgorithms.h"
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#include "profiler.h"
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#include "settings.h" // For g_settings
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#include "main.h" // For g_profiler
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#include "treegen.h"
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#include "mapgen_v6.h"
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#include "mapgen_v7.h"
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FlagDesc flagdesc_mapgen[] = {
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{"trees", MG_TREES},
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{"caves", MG_CAVES},
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{"dungeons", MG_DUNGEONS},
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{"v6_jungles", MGV6_JUNGLES},
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{"v6_biome_blend", MGV6_BIOME_BLEND},
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{"flat", MG_FLAT},
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{NULL, 0}
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};
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FlagDesc flagdesc_ore[] = {
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{"absheight", OREFLAG_ABSHEIGHT},
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{"scatter_noisedensity", OREFLAG_DENSITY},
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{"claylike_nodeisnt", OREFLAG_NODEISNT},
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{NULL, 0}
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};
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///////////////////////////////////////////////////////////////////////////////
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Ore *createOre(OreType type) {
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switch (type) {
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case ORE_SCATTER:
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return new OreScatter;
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case ORE_SHEET:
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return new OreSheet;
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//case ORE_CLAYLIKE: //TODO: implement this!
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// return new OreClaylike;
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default:
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return NULL;
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}
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}
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void Ore::resolveNodeNames(INodeDefManager *ndef) {
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if (ore == CONTENT_IGNORE) {
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ore = ndef->getId(ore_name);
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if (ore == CONTENT_IGNORE) {
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errorstream << "Ore::resolveNodeNames: ore node '"
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<< ore_name << "' not defined";
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ore = CONTENT_AIR;
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wherein = CONTENT_AIR;
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}
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}
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if (wherein == CONTENT_IGNORE) {
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wherein = ndef->getId(wherein_name);
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if (wherein == CONTENT_IGNORE) {
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errorstream << "Ore::resolveNodeNames: wherein node '"
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<< wherein_name << "' not defined";
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ore = CONTENT_AIR;
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wherein = CONTENT_AIR;
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}
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}
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}
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void Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax) {
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int in_range = 0;
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in_range |= (nmin.Y <= height_max && nmax.Y >= height_min);
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if (flags & OREFLAG_ABSHEIGHT)
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in_range |= (nmin.Y >= -height_max && nmax.Y <= -height_min) << 1;
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if (!in_range)
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return;
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resolveNodeNames(mg->ndef);
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int ymin, ymax;
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if (in_range & ORE_RANGE_MIRROR) {
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ymin = MYMAX(nmin.Y, -height_max);
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ymax = MYMIN(nmax.Y, -height_min);
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} else {
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ymin = MYMAX(nmin.Y, height_min);
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ymax = MYMIN(nmax.Y, height_max);
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}
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if (clust_size >= ymax - ymin + 1)
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return;
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nmin.Y = ymin;
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nmax.Y = ymax;
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generate(mg->vm, mg->seed, blockseed, nmin, nmax);
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}
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void OreScatter::generate(ManualMapVoxelManipulator *vm, int seed,
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u32 blockseed, v3s16 nmin, v3s16 nmax) {
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PseudoRandom pr(blockseed);
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MapNode n_ore(ore, 0, ore_param2);
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int volume = (nmax.X - nmin.X + 1) *
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(nmax.Y - nmin.Y + 1) *
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(nmax.Z - nmin.Z + 1);
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int csize = clust_size;
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int orechance = (csize * csize * csize) / clust_num_ores;
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int nclusters = volume / clust_scarcity;
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for (int i = 0; i != nclusters; i++) {
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int x0 = pr.range(nmin.X, nmax.X - csize + 1);
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int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
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int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
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if (np && (NoisePerlin3D(np, x0, y0, z0, seed) < nthresh))
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continue;
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for (int z1 = 0; z1 != csize; z1++)
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for (int y1 = 0; y1 != csize; y1++)
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for (int x1 = 0; x1 != csize; x1++) {
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if (pr.range(1, orechance) != 1)
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continue;
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u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
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if (vm->m_data[i].getContent() == wherein)
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vm->m_data[i] = n_ore;
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}
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}
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}
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void OreSheet::generate(ManualMapVoxelManipulator *vm, int seed,
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u32 blockseed, v3s16 nmin, v3s16 nmax) {
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PseudoRandom pr(blockseed + 4234);
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MapNode n_ore(ore, 0, ore_param2);
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int max_height = clust_size;
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int y_start = pr.range(nmin.Y, nmax.Y - max_height);
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if (!noise) {
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int sx = nmax.X - nmin.X + 1;
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int sz = nmax.Z - nmin.Z + 1;
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noise = new Noise(np, 0, sx, sz);
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}
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noise->seed = seed + y_start;
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noise->perlinMap2D(nmin.X, nmin.Z);
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int index = 0;
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for (int z = nmin.Z; z <= nmax.Z; z++)
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for (int x = nmin.X; x <= nmax.X; x++) {
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float noiseval = noise->result[index++];
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if (noiseval < nthresh)
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continue;
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int height = max_height * (1. / pr.range(1, 3));
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int y0 = y_start + np->scale * noiseval; //pr.range(1, 3) - 1;
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int y1 = y0 + height;
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for (int y = y0; y != y1; y++) {
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u32 i = vm->m_area.index(x, y, z);
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if (!vm->m_area.contains(i))
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continue;
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if (vm->m_data[i].getContent() == wherein)
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vm->m_data[i] = n_ore;
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}
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}
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}
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void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax) {
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bool isliquid, wasliquid;
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v3s16 em = vm->m_area.getExtent();
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for (s16 z = nmin.Z; z <= nmax.Z; z++) {
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for (s16 x = nmin.X; x <= nmax.X; x++) {
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wasliquid = true;
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u32 i = vm->m_area.index(x, nmax.Y, z);
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for (s16 y = nmax.Y; y >= nmin.Y; y--) {
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isliquid = ndef->get(vm->m_data[i]).isLiquid();
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// there was a change between liquid and nonliquid, add to queue
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if (isliquid != wasliquid)
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trans_liquid->push_back(v3s16(x, y, z));
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wasliquid = isliquid;
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vm->m_area.add_y(em, i, -1);
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}
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}
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}
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}
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void Mapgen::setLighting(v3s16 nmin, v3s16 nmax, u8 light) {
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ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
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VoxelArea a(nmin, nmax);
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for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
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for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
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u32 i = vm->m_area.index(a.MinEdge.X, y, z);
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for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
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vm->m_data[i].param1 = light;
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}
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}
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}
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void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light) {
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if (light <= 1 || !a.contains(p))
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return;
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u32 vi = vm->m_area.index(p);
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MapNode &nn = vm->m_data[vi];
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light--;
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// should probably compare masked, but doesn't seem to make a difference
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if (light <= nn.param1 || !ndef->get(nn).light_propagates)
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return;
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nn.param1 = light;
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lightSpread(a, p + v3s16(0, 0, 1), light);
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lightSpread(a, p + v3s16(0, 1, 0), light);
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lightSpread(a, p + v3s16(1, 0, 0), light);
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lightSpread(a, p - v3s16(0, 0, 1), light);
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lightSpread(a, p - v3s16(0, 1, 0), light);
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lightSpread(a, p - v3s16(1, 0, 0), light);
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}
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void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax) {
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VoxelArea a(nmin, nmax);
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bool block_is_underground = (water_level >= nmax.Y);
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ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
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//TimeTaker t("updateLighting");
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// first, send vertical rays of sunshine downward
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v3s16 em = vm->m_area.getExtent();
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for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
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for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
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// see if we can get a light value from the overtop
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u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
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if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
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if (block_is_underground)
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continue;
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} else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
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continue;
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}
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vm->m_area.add_y(em, i, -1);
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for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
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MapNode &n = vm->m_data[i];
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if (!ndef->get(n).sunlight_propagates)
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break;
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n.param1 = LIGHT_SUN;
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vm->m_area.add_y(em, i, -1);
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}
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}
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}
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// now spread the sunlight and light up any sources
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for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
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for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
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u32 i = vm->m_area.index(a.MinEdge.X, y, z);
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for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
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MapNode &n = vm->m_data[i];
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if (n.getContent() == CONTENT_IGNORE ||
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!ndef->get(n).light_propagates)
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continue;
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u8 light_produced = ndef->get(n).light_source & 0x0F;
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if (light_produced)
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n.param1 = light_produced;
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u8 light = n.param1 & 0x0F;
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if (light) {
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lightSpread(a, v3s16(x, y, z + 1), light);
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lightSpread(a, v3s16(x, y + 1, z ), light);
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lightSpread(a, v3s16(x + 1, y, z ), light);
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lightSpread(a, v3s16(x, y, z - 1), light);
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lightSpread(a, v3s16(x, y - 1, z ), light);
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lightSpread(a, v3s16(x - 1, y, z ), light);
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}
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}
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}
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}
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//printf("updateLighting: %dms\n", t.stop());
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}
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void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax) {
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enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
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VoxelArea a(nmin, nmax);
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bool block_is_underground = (water_level > nmax.Y);
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bool sunlight = !block_is_underground;
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ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
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for (int i = 0; i < 2; i++) {
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enum LightBank bank = banks[i];
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std::set<v3s16> light_sources;
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std::map<v3s16, u8> unlight_from;
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voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
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light_sources, unlight_from);
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voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
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vm->unspreadLight(bank, unlight_from, light_sources, ndef);
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vm->spreadLight(bank, light_sources, ndef);
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}
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}
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//////////////////////// Mapgen V6 parameter read/write
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bool MapgenV6Params::readParams(Settings *settings) {
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freq_desert = settings->getFloat("mgv6_freq_desert");
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freq_beach = settings->getFloat("mgv6_freq_beach");
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np_terrain_base = settings->getNoiseParams("mgv6_np_terrain_base");
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np_terrain_higher = settings->getNoiseParams("mgv6_np_terrain_higher");
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np_steepness = settings->getNoiseParams("mgv6_np_steepness");
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np_height_select = settings->getNoiseParams("mgv6_np_height_select");
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np_mud = settings->getNoiseParams("mgv6_np_mud");
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np_beach = settings->getNoiseParams("mgv6_np_beach");
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np_biome = settings->getNoiseParams("mgv6_np_biome");
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np_cave = settings->getNoiseParams("mgv6_np_cave");
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np_humidity = settings->getNoiseParams("mgv6_np_humidity");
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np_trees = settings->getNoiseParams("mgv6_np_trees");
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np_apple_trees = settings->getNoiseParams("mgv6_np_apple_trees");
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bool success =
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np_terrain_base && np_terrain_higher && np_steepness &&
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np_height_select && np_trees && np_mud &&
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np_beach && np_biome && np_cave &&
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np_humidity && np_apple_trees;
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return success;
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}
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void MapgenV6Params::writeParams(Settings *settings) {
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settings->setFloat("mgv6_freq_desert", freq_desert);
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settings->setFloat("mgv6_freq_beach", freq_beach);
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settings->setNoiseParams("mgv6_np_terrain_base", np_terrain_base);
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settings->setNoiseParams("mgv6_np_terrain_higher", np_terrain_higher);
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settings->setNoiseParams("mgv6_np_steepness", np_steepness);
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settings->setNoiseParams("mgv6_np_height_select", np_height_select);
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settings->setNoiseParams("mgv6_np_mud", np_mud);
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settings->setNoiseParams("mgv6_np_beach", np_beach);
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settings->setNoiseParams("mgv6_np_biome", np_biome);
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settings->setNoiseParams("mgv6_np_cave", np_cave);
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settings->setNoiseParams("mgv6_np_humidity", np_humidity);
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settings->setNoiseParams("mgv6_np_trees", np_trees);
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settings->setNoiseParams("mgv6_np_apple_trees", np_apple_trees);
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}
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bool MapgenV7Params::readParams(Settings *settings) {
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np_terrain_base = settings->getNoiseParams("mgv7_np_terrain_base");
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np_terrain_alt = settings->getNoiseParams("mgv7_np_terrain_alt");
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np_terrain_mod = settings->getNoiseParams("mgv7_np_terrain_mod");
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np_terrain_persist = settings->getNoiseParams("mgv7_np_terrain_persist");
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np_height_select = settings->getNoiseParams("mgv7_np_height_select");
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np_ridge = settings->getNoiseParams("mgv7_np_ridge");
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bool success =
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np_terrain_base && np_terrain_alt && np_terrain_mod &&
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np_terrain_persist && np_height_select && np_ridge;
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return success;
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}
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void MapgenV7Params::writeParams(Settings *settings) {
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settings->setNoiseParams("mgv7_np_terrain_base", np_terrain_base);
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settings->setNoiseParams("mgv7_np_terrain_alt", np_terrain_alt);
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settings->setNoiseParams("mgv7_np_terrain_mod", np_terrain_mod);
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settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
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settings->setNoiseParams("mgv7_np_height_select", np_height_select);
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settings->setNoiseParams("mgv7_np_ridge", np_ridge);
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}
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/////////////////////////////////// legacy static functions for farmesh
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s16 Mapgen::find_ground_level_from_noise(u64 seed, v2s16 p2d, s16 precision) {
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//just need to return something
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s16 level = 5;
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return level;
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}
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bool Mapgen::get_have_beach(u64 seed, v2s16 p2d) {
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double sandnoise = noise2d_perlin(
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0.2+(float)p2d.X/250, 0.7+(float)p2d.Y/250,
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seed+59420, 3, 0.50);
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return (sandnoise > 0.15);
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}
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double Mapgen::tree_amount_2d(u64 seed, v2s16 p) {
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double noise = noise2d_perlin(
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0.5+(float)p.X/125, 0.5+(float)p.Y/125,
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seed+2, 4, 0.66);
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double zeroval = -0.39;
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if(noise < zeroval)
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return 0;
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else
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return 0.04 * (noise-zeroval) / (1.0-zeroval);
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}
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