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/*
Minetest
Copyright (C) 2016-2018 Duane Robertson <duane@duanerobertson.com>
Copyright (C) 2016-2018 paramat
Based on Valleys Mapgen by Gael de Sailly
(https://forum.minetest.net/viewtopic.php?f=9&t=11430)
and mapgen_v7 by kwolekr and paramat.
Licensing changed by permission of Gael de Sailly.
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.
*/
#pragma once
#include "mapgen.h"
////////////// Mapgen Valleys flags
#define MGVALLEYS_ALT_CHILL 0x01
#define MGVALLEYS_HUMID_RIVERS 0x02
// Feed only one variable into these
#define MYSQUARE(x) (x) * (x)
#define MYCUBE(x) (x) * (x) * (x)
class BiomeManager;
class BiomeGenOriginal;
struct MapgenValleysParams : public MapgenParams {
u32 spflags = MGVALLEYS_HUMID_RIVERS | MGVALLEYS_ALT_CHILL;
u16 altitude_chill = 90; // The altitude at which temperature drops by 20C
u16 river_depth = 4; // How deep to carve river channels
u16 river_size = 5; // How wide to make rivers
float cave_width = 0.09f;
s16 large_cave_depth = -33;
s16 lava_depth = 1;
s16 cavern_limit = -256;
s16 cavern_taper = 192;
float cavern_threshold = 0.6f;
s16 dungeon_ymin = -31000;
s16 dungeon_ymax = 63; // No higher than surface mapchunks
NoiseParams np_filler_depth;
NoiseParams np_inter_valley_fill;
NoiseParams np_inter_valley_slope;
NoiseParams np_rivers;
NoiseParams np_terrain_height;
NoiseParams np_valley_depth;
NoiseParams np_valley_profile;
NoiseParams np_cave1;
NoiseParams np_cave2;
NoiseParams np_cavern;
MapgenValleysParams();
~MapgenValleysParams() = default;
void readParams(const Settings *settings);
void writeParams(Settings *settings) const;
};
struct TerrainNoise {
s16 x;
s16 z;
float terrain_height;
float *rivers;
float *valley;
float valley_profile;
float *slope;
float inter_valley_fill;
};
class MapgenValleys : public MapgenBasic {
public:
MapgenValleys(int mapgenid, MapgenValleysParams *params, EmergeManager *emerge);
~MapgenValleys();
virtual MapgenType getType() const { return MAPGEN_VALLEYS; }
virtual void makeChunk(BlockMakeData *data);
int getSpawnLevelAtPoint(v2s16 p);
private:
BiomeGenOriginal *m_bgen;
float altitude_chill;
bool humid_rivers;
bool use_altitude_chill;
float humidity_adjust;
float river_depth_bed;
float river_size_factor;
s16 large_cave_depth;
s16 dungeon_ymin;
s16 dungeon_ymax;
Noise *noise_inter_valley_fill;
Noise *noise_inter_valley_slope;
Noise *noise_rivers;
Noise *noise_terrain_height;
Noise *noise_valley_depth;
Noise *noise_valley_profile;
float terrainLevelAtPoint(s16 x, s16 z);
void calculateNoise();
virtual int generateTerrain();
float terrainLevelFromNoise(TerrainNoise *tn);
float adjustedTerrainLevelFromNoise(TerrainNoise *tn);
};
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