mapgen_v7.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2014-2020 paramat
// Copyright (C) 2013-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
 
#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
 
 
extern const 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 = nullptr;
        Noise *noise_terrain_alt = nullptr;
        Noise *noise_terrain_persist = nullptr;
        Noise *noise_height_select = nullptr;
        Noise *noise_mount_height = nullptr;
        Noise *noise_ridge_uwater = nullptr;
        Noise *noise_mountain = nullptr;
        Noise *noise_ridge = nullptr;
        Noise *noise_floatland = nullptr;
};