mapgen_v7.h

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/*
Minetest
Copyright (C) 2014-2020 paramat
Copyright (C) 2013-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
 
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 MGV7_MOUNTAINS   0x01
#define MGV7_RIDGES      0x02
#define MGV7_FLOATLANDS  0x04
#define MGV7_CAVERNS     0x08
#define MGV7_BIOMEREPEAT 0x10 // Now unused
 
class BiomeManager;
 
extern FlagDesc flagdesc_mapgen_v7[];
 
 
struct MapgenV7Params : public MapgenParams {
    s16 mount_zero_level = 0;
    s16 floatland_ymin = 1024;
    s16 floatland_ymax = 4096;
    s16 floatland_taper = 256;
    float float_taper_exp = 2.0f;
    float floatland_density = -0.6f;
    s16 floatland_ywater = -31000;
 
    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 = 256;
    float cavern_threshold = 0.7f;
    s16 dungeon_ymin = -31000;
    s16 dungeon_ymax = 31000;
 
    NoiseParams np_terrain_base;
    NoiseParams np_terrain_alt;
    NoiseParams np_terrain_persist;
    NoiseParams np_height_select;
    NoiseParams np_filler_depth;
    NoiseParams np_mount_height;
    NoiseParams np_ridge_uwater;
    NoiseParams np_mountain;
    NoiseParams np_ridge;
    NoiseParams np_floatland;
    NoiseParams np_cavern;
    NoiseParams np_cave1;
    NoiseParams np_cave2;
    NoiseParams np_dungeons;
 
    MapgenV7Params();
    ~MapgenV7Params() = default;
 
    void readParams(const Settings *settings);
    void writeParams(Settings *settings) const;
    void setDefaultSettings(Settings *settings);
};
 
 
class MapgenV7 : public MapgenBasic {
public:
    MapgenV7(MapgenV7Params *params, EmergeParams *emerge);
    ~MapgenV7();
 
    virtual MapgenType getType() const { return MAPGEN_V7; }
 
    virtual void makeChunk(BlockMakeData *data);
    int getSpawnLevelAtPoint(v2s16 p);
 
    float baseTerrainLevelAtPoint(s16 x, s16 z);
    float baseTerrainLevelFromMap(int index);
    bool getMountainTerrainAtPoint(s16 x, s16 y, s16 z);
    bool getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y);
    bool getRiverChannelFromMap(int idx_xyz, int idx_xz, s16 y);
    bool getFloatlandTerrainFromMap(int idx_xyz, float float_offset);
 
    int generateTerrain();
 
private:
    s16 mount_zero_level;
    s16 floatland_ymin;
    s16 floatland_ymax;
    s16 floatland_taper;
    float float_taper_exp;
    float floatland_density;
    s16 floatland_ywater;
 
    float *float_offset_cache = nullptr;
 
    Noise *noise_terrain_base;
    Noise *noise_terrain_alt;
    Noise *noise_terrain_persist;
    Noise *noise_height_select;
    Noise *noise_mount_height;
    Noise *noise_ridge_uwater;
    Noise *noise_mountain;
    Noise *noise_ridge;
    Noise *noise_floatland;
};