forked from Mirrorlandia_minetest/minetest
936d67dad4
The 'absheight' flag was added years ago for the floatlands of 'indev' mapgen (now deleted). The feature mirrored all ore placement around y = 0 to place ores in floatlands. In MTG we now use dedicated ore registrations for floatlands. The feature is crude, inflexible, problematic and very rarely used, it also makes ore vertical range code more complex. Minetest 0.5 is a good chance to remove the feature. The flag itself remains to not break flag values.
427 lines
10 KiB
C++
427 lines
10 KiB
C++
/*
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Minetest
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Copyright (C) 2014-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
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Copyright (C) 2015-2017 paramat
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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 "mg_ore.h"
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#include "mapgen.h"
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#include "noise.h"
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#include "map.h"
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#include "log.h"
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#include <algorithm>
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FlagDesc flagdesc_ore[] = {
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{"absheight", OREFLAG_ABSHEIGHT}, // Non-functional
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{"puff_cliffs", OREFLAG_PUFF_CLIFFS},
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{"puff_additive_composition", OREFLAG_PUFF_ADDITIVE},
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{NULL, 0}
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};
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///////////////////////////////////////////////////////////////////////////////
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OreManager::OreManager(IGameDef *gamedef) :
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ObjDefManager(gamedef, OBJDEF_ORE)
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{
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}
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size_t OreManager::placeAllOres(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
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{
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size_t nplaced = 0;
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for (size_t i = 0; i != m_objects.size(); i++) {
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Ore *ore = (Ore *)m_objects[i];
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if (!ore)
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continue;
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nplaced += ore->placeOre(mg, blockseed, nmin, nmax);
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blockseed++;
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}
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return nplaced;
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}
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void OreManager::clear()
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{
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for (size_t i = 0; i < m_objects.size(); i++) {
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Ore *ore = (Ore *)m_objects[i];
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delete ore;
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}
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m_objects.clear();
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}
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///////////////////////////////////////////////////////////////////////////////
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Ore::~Ore()
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{
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delete noise;
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}
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void Ore::resolveNodeNames()
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{
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getIdFromNrBacklog(&c_ore, "", CONTENT_AIR);
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getIdsFromNrBacklog(&c_wherein);
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}
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size_t Ore::placeOre(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
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{
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if (!(nmin.Y <= y_max && nmax.Y >= y_min))
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return 0;
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int actual_ymin = MYMAX(nmin.Y, y_min);
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int actual_ymax = MYMIN(nmax.Y, y_max);
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if (clust_size >= actual_ymax - actual_ymin + 1)
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return 0;
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nmin.Y = actual_ymin;
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nmax.Y = actual_ymax;
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generate(mg->vm, mg->seed, blockseed, nmin, nmax, mg->biomemap);
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return 1;
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}
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///////////////////////////////////////////////////////////////////////////////
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void OreScatter::generate(MMVManip *vm, int mapseed, u32 blockseed,
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v3s16 nmin, v3s16 nmax, u8 *biomemap)
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{
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PcgRandom pr(blockseed);
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MapNode n_ore(c_ore, 0, ore_param2);
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u32 sizex = (nmax.X - nmin.X + 1);
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u32 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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u32 csize = clust_size;
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u32 cvolume = csize * csize * csize;
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u32 nclusters = volume / clust_scarcity;
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for (u32 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 ((flags & OREFLAG_USE_NOISE) &&
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(NoisePerlin3D(&np, x0, y0, z0, mapseed) < nthresh))
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continue;
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if (biomemap && !biomes.empty()) {
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u32 index = sizex * (z0 - nmin.Z) + (x0 - nmin.X);
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std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[index]);
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if (it == biomes.end())
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continue;
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}
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for (u32 z1 = 0; z1 != csize; z1++)
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for (u32 y1 = 0; y1 != csize; y1++)
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for (u32 x1 = 0; x1 != csize; x1++) {
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if (pr.range(1, cvolume) > clust_num_ores)
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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 (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
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continue;
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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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///////////////////////////////////////////////////////////////////////////////
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void OreSheet::generate(MMVManip *vm, int mapseed, u32 blockseed,
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v3s16 nmin, v3s16 nmax, u8 *biomemap)
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{
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PcgRandom pr(blockseed + 4234);
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MapNode n_ore(c_ore, 0, ore_param2);
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u16 max_height = column_height_max;
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int y_start_min = nmin.Y + max_height;
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int y_start_max = nmax.Y - max_height;
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int y_start = y_start_min < y_start_max ?
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pr.range(y_start_min, y_start_max) :
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(y_start_min + y_start_max) / 2;
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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 = mapseed + y_start;
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noise->perlinMap2D(nmin.X, nmin.Z);
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size_t 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++, index++) {
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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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if (biomemap && !biomes.empty()) {
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std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[index]);
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if (it == biomes.end())
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continue;
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}
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u16 height = pr.range(column_height_min, column_height_max);
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int ymidpoint = y_start + noiseval;
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int y0 = MYMAX(nmin.Y, ymidpoint - height * (1 - column_midpoint_factor));
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int y1 = MYMIN(nmax.Y, y0 + height - 1);
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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 (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
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continue;
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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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///////////////////////////////////////////////////////////////////////////////
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OrePuff::OrePuff() :
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Ore()
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{
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}
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OrePuff::~OrePuff()
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{
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delete noise_puff_top;
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delete noise_puff_bottom;
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}
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void OrePuff::generate(MMVManip *vm, int mapseed, u32 blockseed,
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v3s16 nmin, v3s16 nmax, u8 *biomemap)
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{
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PcgRandom pr(blockseed + 4234);
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MapNode n_ore(c_ore, 0, ore_param2);
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int y_start = pr.range(nmin.Y, nmax.Y);
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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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noise_puff_top = new Noise(&np_puff_top, 0, sx, sz);
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noise_puff_bottom = new Noise(&np_puff_bottom, 0, sx, sz);
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}
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noise->seed = mapseed + y_start;
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noise->perlinMap2D(nmin.X, nmin.Z);
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bool noise_generated = false;
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size_t 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++, index++) {
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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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if (biomemap && !biomes.empty()) {
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std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[index]);
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if (it == biomes.end())
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continue;
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}
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if (!noise_generated) {
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noise_generated = true;
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noise_puff_top->perlinMap2D(nmin.X, nmin.Z);
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noise_puff_bottom->perlinMap2D(nmin.X, nmin.Z);
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}
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float ntop = noise_puff_top->result[index];
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float nbottom = noise_puff_bottom->result[index];
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if (!(flags & OREFLAG_PUFF_CLIFFS)) {
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float ndiff = noiseval - nthresh;
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if (ndiff < 1.0f) {
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ntop *= ndiff;
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nbottom *= ndiff;
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}
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}
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int ymid = y_start;
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int y0 = ymid - nbottom;
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int y1 = ymid + ntop;
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if ((flags & OREFLAG_PUFF_ADDITIVE) && (y0 > y1))
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SWAP(int, y0, y1);
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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 (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
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continue;
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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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///////////////////////////////////////////////////////////////////////////////
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void OreBlob::generate(MMVManip *vm, int mapseed, u32 blockseed,
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v3s16 nmin, v3s16 nmax, u8 *biomemap)
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{
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PcgRandom pr(blockseed + 2404);
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MapNode n_ore(c_ore, 0, ore_param2);
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u32 sizex = (nmax.X - nmin.X + 1);
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u32 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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u32 csize = clust_size;
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u32 nblobs = volume / clust_scarcity;
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if (!noise)
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noise = new Noise(&np, mapseed, csize, csize, csize);
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for (u32 i = 0; i != nblobs; 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 (biomemap && !biomes.empty()) {
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u32 bmapidx = sizex * (z0 - nmin.Z) + (x0 - nmin.X);
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std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[bmapidx]);
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if (it == biomes.end())
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continue;
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}
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bool noise_generated = false;
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noise->seed = blockseed + i;
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size_t index = 0;
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for (u32 z1 = 0; z1 != csize; z1++)
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for (u32 y1 = 0; y1 != csize; y1++)
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for (u32 x1 = 0; x1 != csize; x1++, index++) {
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u32 i = vm->m_area.index(x0 + x1, y0 + y1, z0 + z1);
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if (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
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continue;
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// Lazily generate noise only if there's a chance of ore being placed
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// This simple optimization makes calls 6x faster on average
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if (!noise_generated) {
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noise_generated = true;
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noise->perlinMap3D(x0, y0, z0);
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}
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float noiseval = noise->result[index];
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float xdist = (s32)x1 - (s32)csize / 2;
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float ydist = (s32)y1 - (s32)csize / 2;
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float zdist = (s32)z1 - (s32)csize / 2;
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noiseval -= (sqrt(xdist * xdist + ydist * ydist + zdist * zdist) / csize);
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if (noiseval < nthresh)
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continue;
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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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///////////////////////////////////////////////////////////////////////////////
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OreVein::OreVein() :
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Ore()
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{
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}
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OreVein::~OreVein()
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{
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delete noise2;
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}
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void OreVein::generate(MMVManip *vm, int mapseed, u32 blockseed,
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v3s16 nmin, v3s16 nmax, u8 *biomemap)
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{
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PcgRandom pr(blockseed + 520);
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MapNode n_ore(c_ore, 0, ore_param2);
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u32 sizex = (nmax.X - nmin.X + 1);
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if (!noise) {
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int sx = nmax.X - nmin.X + 1;
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int sy = nmax.Y - nmin.Y + 1;
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int sz = nmax.Z - nmin.Z + 1;
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noise = new Noise(&np, mapseed, sx, sy, sz);
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noise2 = new Noise(&np, mapseed + 436, sx, sy, sz);
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}
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bool noise_generated = false;
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size_t index = 0;
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for (int z = nmin.Z; z <= nmax.Z; z++)
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for (int y = nmin.Y; y <= nmax.Y; y++)
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for (int x = nmin.X; x <= nmax.X; x++, index++) {
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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 (!CONTAINS(c_wherein, vm->m_data[i].getContent()))
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continue;
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if (biomemap && !biomes.empty()) {
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u32 bmapidx = sizex * (z - nmin.Z) + (x - nmin.X);
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std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[bmapidx]);
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if (it == biomes.end())
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continue;
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}
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// Same lazy generation optimization as in OreBlob
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if (!noise_generated) {
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noise_generated = true;
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noise->perlinMap3D(nmin.X, nmin.Y, nmin.Z);
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noise2->perlinMap3D(nmin.X, nmin.Y, nmin.Z);
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}
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// randval ranges from -1..1
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float randval = (float)pr.next() / (pr.RANDOM_RANGE / 2) - 1.f;
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float noiseval = contour(noise->result[index]);
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float noiseval2 = contour(noise2->result[index]);
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if (noiseval * noiseval2 + randval * random_factor < nthresh)
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continue;
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vm->m_data[i] = n_ore;
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}
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}
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