mapgen_carpathian.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2017-2019 vlapsley, Vaughan Lapsley <vlapsley@gmail.com>
// Copyright (C) 2017-2019 paramat
 
#pragma once
 
#include "mapgen.h"
 
#define MGCARPATHIAN_CAVERNS 0x01
#define MGCARPATHIAN_RIVERS  0x02
 
 
extern const FlagDesc flagdesc_mapgen_carpathian[];
 
 
struct MapgenCarpathianParams : public MapgenParams
{
        float base_level       = 12.0f;
        float river_width      = 0.05f;
        float river_depth      = 24.0f;
        float valley_width     = 0.25f;
 
        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_filler_depth;
        NoiseParams np_height1;
        NoiseParams np_height2;
        NoiseParams np_height3;
        NoiseParams np_height4;
        NoiseParams np_hills_terrain;
        NoiseParams np_ridge_terrain;
        NoiseParams np_step_terrain;
        NoiseParams np_hills;
        NoiseParams np_ridge_mnt;
        NoiseParams np_step_mnt;
        NoiseParams np_rivers;
        NoiseParams np_mnt_var;
        NoiseParams np_cave1;
        NoiseParams np_cave2;
        NoiseParams np_cavern;
        NoiseParams np_dungeons;
 
        MapgenCarpathianParams();
        ~MapgenCarpathianParams() = default;
 
        void readParams(const Settings *settings);
        void writeParams(Settings *settings) const;
        void setDefaultSettings(Settings *settings);
};
 
class MapgenCarpathian : public MapgenBasic
{
public:
        MapgenCarpathian(MapgenCarpathianParams *params, EmergeParams *emerge);
        ~MapgenCarpathian();
 
        virtual MapgenType getType() const { return MAPGEN_CARPATHIAN; }
 
        virtual void makeChunk(BlockMakeData *data);
        int getSpawnLevelAtPoint(v2s16 p);
 
private:
        float base_level;
        float river_width;
        float river_depth;
        float valley_width;
 
        Noise *noise_height1 = nullptr;
        Noise *noise_height2 = nullptr;
        Noise *noise_height3 = nullptr;
        Noise *noise_height4 = nullptr;
        Noise *noise_hills_terrain = nullptr;
        Noise *noise_ridge_terrain = nullptr;
        Noise *noise_step_terrain = nullptr;
        Noise *noise_hills = nullptr;
        Noise *noise_ridge_mnt = nullptr;
        Noise *noise_step_mnt = nullptr;
        Noise *noise_rivers = nullptr;
        Noise *noise_mnt_var = nullptr;
 
        s32 grad_wl;
 
        float getSteps(float noise);
        inline float getLerp(float noise1, float noise2, float mod);
        int generateTerrain();
};