mapgen_valleys.h

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/*
Minetest
Copyright (C) 2016-2019 Duane Robertson <duane@duanerobertson.com>
Copyright (C) 2016-2019 paramat
 
Based on Valleys Mapgen by Gael de Sailly
(https://forum.minetest.net/viewtopic.php?f=9&t=11430)
and mapgen_v7, mapgen_flat 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"
 
#define MGVALLEYS_ALT_CHILL        0x01
#define MGVALLEYS_HUMID_RIVERS     0x02
#define MGVALLEYS_VARY_RIVER_DEPTH 0x04
#define MGVALLEYS_ALT_DRY          0x08
 
class BiomeManager;
class BiomeGenOriginal;
 
extern FlagDesc flagdesc_mapgen_valleys[];
 
 
struct MapgenValleysParams : public MapgenParams {
    u16 altitude_chill = 90;
    u16 river_depth = 4;
    u16 river_size = 5;
 
    float cave_width = 0.09f;
    s16 large_cave_depth = -33;
    u16 small_cave_num_min = 0;
    u16 small_cave_num_max = 0;
    u16 large_cave_num_min = 0;
    u16 large_cave_num_max = 2;
    float large_cave_flooded = 0.5f;
    s16 cavern_limit = -256;
    s16 cavern_taper = 192;
    float cavern_threshold = 0.6f;
    s16 dungeon_ymin = -31000;
    s16 dungeon_ymax = 63;
 
    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;
    NoiseParams np_dungeons;
 
    MapgenValleysParams();
    ~MapgenValleysParams() = default;
 
    void readParams(const Settings *settings);
    void writeParams(Settings *settings) const;
    void setDefaultSettings(Settings *settings);
};
 
 
class MapgenValleys : public MapgenBasic {
public:
 
    MapgenValleys(MapgenValleysParams *params,
        EmergeParams *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;
    float river_depth_bed;
    float river_size_factor;
 
    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;
 
    virtual int generateTerrain();
};