minetest/src/mg_ore.cpp

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/*
Minetest
Copyright (C) 2014-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2015-2017 paramat
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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"
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#include "map.h"
#include "log.h"
#include "util/numeric.h"
#include <algorithm>
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FlagDesc flagdesc_ore[] = {
{"absheight", OREFLAG_ABSHEIGHT}, // Non-functional
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{"puff_cliffs", OREFLAG_PUFF_CLIFFS},
{"puff_additive_composition", OREFLAG_PUFF_ADDITIVE},
{NULL, 0}
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};
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///////////////////////////////////////////////////////////////////////////////
OreManager::OreManager(IGameDef *gamedef) :
ObjDefManager(gamedef, OBJDEF_ORE)
{
}
size_t OreManager::placeAllOres(Mapgen *mg, u32 blockseed,
v3s16 nmin, v3s16 nmax, s16 ore_zero_level)
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{
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, ore_zero_level);
blockseed++;
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}
return nplaced;
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}
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, s16 ore_zero_level)
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{
// Ore y_min / y_max is displaced by ore_zero_level or remains unchanged.
// Any ore 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 + ore_zero_level;
s32 y_max_disp = (y_max >= MAX_MAP_GENERATION_LIMIT) ?
MAX_MAP_GENERATION_LIMIT : y_max + ore_zero_level;
if (nmin.Y > y_max_disp || nmax.Y < y_min_disp)
return 0;
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int actual_ymin = MYMAX(nmin.Y, y_min_disp);
int actual_ymax = MYMIN(nmax.Y, y_max_disp);
if (clust_size >= actual_ymax - actual_ymin + 1)
return 0;
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nmin.Y = actual_ymin;
nmax.Y = actual_ymax;
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generate(mg->vm, mg->seed, blockseed, nmin, nmax, mg->biomemap);
return 1;
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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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{
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);
u32 volume = (nmax.X - nmin.X + 1) *
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(nmax.Y - nmin.Y + 1) *
(nmax.Z - nmin.Z + 1);
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u32 csize = clust_size;
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);
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))
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continue;
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if (biomemap && !biomes.empty()) {
u32 index = sizex * (z0 - nmin.Z) + (x0 - nmin.X);
std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[index]);
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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)
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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,
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v3s16 nmin, v3s16 nmax, u8 *biomemap)
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{
PcgRandom pr(blockseed + 4234);
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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;
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if (!noise) {
int sx = nmax.X - nmin.X + 1;
int sz = nmax.Z - nmin.Z + 1;
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noise = new Noise(&np, 0, sx, sz);
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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++) {
float noiseval = noise->result[index];
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if (noiseval < nthresh)
continue;
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if (biomemap && !biomes.empty()) {
std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[index]);
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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++) {
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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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///////////////////////////////////////////////////////////////////////////////
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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);
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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]);
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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,
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v3s16 nmin, v3s16 nmax, u8 *biomemap)
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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);
u32 volume = (nmax.X - nmin.X + 1) *
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(nmax.Y - nmin.Y + 1) *
(nmax.Z - nmin.Z + 1);
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u32 csize = clust_size;
u32 nblobs = volume / clust_scarcity;
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if (!noise)
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);
int y0 = pr.range(nmin.Y, nmax.Y - csize + 1);
int z0 = pr.range(nmin.Z, nmax.Z - csize + 1);
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if (biomemap && !biomes.empty()) {
u32 bmapidx = sizex * (z0 - nmin.Z) + (x0 - nmin.X);
std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[bmapidx]);
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if (it == biomes.end())
continue;
}
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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++) {
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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];
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float xdist = (s32)x1 - (s32)csize / 2;
float ydist = (s32)y1 - (s32)csize / 2;
float zdist = (s32)z1 - (s32)csize / 2;
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noiseval -= (sqrt(xdist * xdist + ydist * ydist + zdist * zdist) / csize);
if (noiseval < nthresh)
continue;
vm->m_data[i] = n_ore;
}
}
}
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///////////////////////////////////////////////////////////////////////////////
OreVein::~OreVein()
{
delete noise2;
}
void OreVein::generate(MMVManip *vm, int mapseed, u32 blockseed,
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v3s16 nmin, v3s16 nmax, u8 *biomemap)
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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) {
int sx = nmax.X - nmin.X + 1;
int sy = nmax.Y - nmin.Y + 1;
int sz = nmax.Z - nmin.Z + 1;
noise = new Noise(&np, mapseed, sx, sy, sz);
noise2 = new Noise(&np, mapseed + 436, sx, sy, sz);
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}
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;
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if (biomemap && !biomes.empty()) {
u32 bmapidx = sizex * (z - nmin.Z) + (x - nmin.X);
std::unordered_set<u8>::const_iterator it = biomes.find(biomemap[bmapidx]);
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if (it == biomes.end())
continue;
}
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// 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;
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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;
}
}