mapgen_fractal.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2015-2019 paramat
// Copyright (C) 2015-2016 kwolekr, Ryan Kwolek
 
#pragma once
 
#include "mapgen.h"
 
#define MGFRACTAL_TERRAIN     0x01
 
 
extern const FlagDesc flagdesc_mapgen_fractal[];
 
 
struct MapgenFractalParams : public MapgenParams
{
        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 dungeon_ymin = -31000;
        s16 dungeon_ymax = 31000;
        u16 fractal = 1;
        u16 iterations = 11;
        v3f scale = v3f(4096.0, 1024.0, 4096.0);
        v3f offset = v3f(1.52, 0.0, 0.0);
        float slice_w = 0.0f;
        float julia_x = 0.267f;
        float julia_y = 0.2f;
        float julia_z = 0.133f;
        float julia_w = 0.067f;
 
        NoiseParams np_seabed;
        NoiseParams np_filler_depth;
        NoiseParams np_cave1;
        NoiseParams np_cave2;
        NoiseParams np_dungeons;
 
        MapgenFractalParams();
        ~MapgenFractalParams() = default;
 
        void readParams(const Settings *settings);
        void writeParams(Settings *settings) const;
        void setDefaultSettings(Settings *settings);
};
 
 
class MapgenFractal : public MapgenBasic
{
public:
        MapgenFractal(MapgenFractalParams *params, EmergeParams *emerge);
        ~MapgenFractal();
 
        virtual MapgenType getType() const { return MAPGEN_FRACTAL; }
 
        virtual void makeChunk(BlockMakeData *data);
        int getSpawnLevelAtPoint(v2s16 p);
        bool getFractalAtPoint(s16 x, s16 y, s16 z);
        s16 generateTerrain();
 
private:
        u16 formula;
        bool julia;
        u16 fractal;
        u16 iterations;
        v3f scale;
        v3f offset;
        float slice_w;
        float julia_x;
        float julia_y;
        float julia_z;
        float julia_w;
        Noise *noise_seabed = nullptr;
};