mapgen_carpathian.h

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/*
Minetest
Copyright (C) 2017-2019 vlapsley, Vaughan Lapsley <vlapsley@gmail.com>
Copyright (C) 2017-2019 paramat
 
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 MGCARPATHIAN_CAVERNS 0x01
#define MGCARPATHIAN_RIVERS  0x02
 
class BiomeManager;
 
extern 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;
    Noise *noise_height2;
    Noise *noise_height3;
    Noise *noise_height4;
    Noise *noise_hills_terrain;
    Noise *noise_ridge_terrain;
    Noise *noise_step_terrain;
    Noise *noise_hills;
    Noise *noise_ridge_mnt;
    Noise *noise_step_mnt;
    Noise *noise_rivers = nullptr;
    Noise *noise_mnt_var;
 
    s32 grad_wl;
 
    float getSteps(float noise);
    inline float getLerp(float noise1, float noise2, float mod);
    int generateTerrain();
};