mapgen_v6.h

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/*
Minetest
Copyright (C) 2010-2018 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2013-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2014-2018 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"
#include "noise.h"
 
#define MGV6_AVERAGE_MUD_AMOUNT 4
#define MGV6_DESERT_STONE_BASE -32
#define MGV6_ICE_BASE 0
#define MGV6_FREQ_HOT 0.4
#define MGV6_FREQ_SNOW -0.4
#define MGV6_FREQ_TAIGA 0.5
#define MGV6_FREQ_JUNGLE 0.5
 
#define MGV6_JUNGLES    0x01
#define MGV6_BIOMEBLEND 0x02
#define MGV6_MUDFLOW    0x04
#define MGV6_SNOWBIOMES 0x08
#define MGV6_FLAT       0x10
#define MGV6_TREES      0x20
#define MGV6_TEMPLES    0x40
 
 
extern FlagDesc flagdesc_mapgen_v6[];
 
 
enum BiomeV6Type
{
    BT_NORMAL,
    BT_DESERT,
    BT_JUNGLE,
    BT_TUNDRA,
    BT_TAIGA,
};
 
 
struct MapgenV6Params : public MapgenParams {
    float freq_desert = 0.45f;
    float freq_beach = 0.15f;
    s16 dungeon_ymin = -31000;
    s16 dungeon_ymax = 31000;
 
    NoiseParams np_terrain_base;
    NoiseParams np_terrain_higher;
    NoiseParams np_steepness;
    NoiseParams np_height_select;
    NoiseParams np_mud;
    NoiseParams np_beach;
    NoiseParams np_biome;
    NoiseParams np_cave;
    NoiseParams np_humidity;
    NoiseParams np_trees;
    NoiseParams np_apple_trees;
 
    MapgenV6Params();
    ~MapgenV6Params() = default;
 
    void readParams(const Settings *settings);
    void writeParams(Settings *settings) const;
    void setDefaultSettings(Settings *settings);
};
 
 
class MapgenV6 : public Mapgen {
public:
    int ystride;
    u32 spflags;
 
    v3s16 node_min;
    v3s16 node_max;
    v3s16 full_node_min;
    v3s16 full_node_max;
    v3s16 central_area_size;
 
    Noise *noise_terrain_base;
    Noise *noise_terrain_higher;
    Noise *noise_steepness;
    Noise *noise_height_select;
    Noise *noise_mud;
    Noise *noise_beach;
    Noise *noise_biome;
    Noise *noise_humidity;
    NoiseParams *np_cave;
    NoiseParams *np_humidity;
    NoiseParams *np_trees;
    NoiseParams *np_apple_trees;
 
    NoiseParams np_dungeons;
 
    float freq_desert;
    float freq_beach;
    s16 dungeon_ymin;
    s16 dungeon_ymax;
 
    content_t c_stone;
    content_t c_dirt;
    content_t c_dirt_with_grass;
    content_t c_sand;
    content_t c_water_source;
    content_t c_lava_source;
    content_t c_gravel;
    content_t c_desert_stone;
    content_t c_desert_sand;
    content_t c_dirt_with_snow;
    content_t c_snow;
    content_t c_snowblock;
    content_t c_ice;
 
    content_t c_cobble;
    content_t c_mossycobble;
    content_t c_stair_cobble;
    content_t c_stair_desert_stone;
 
    MapgenV6(MapgenV6Params *params, EmergeParams *emerge);
    ~MapgenV6();
 
    virtual MapgenType getType() const { return MAPGEN_V6; }
 
    void makeChunk(BlockMakeData *data);
    int getGroundLevelAtPoint(v2s16 p);
    int getSpawnLevelAtPoint(v2s16 p);
 
    float baseTerrainLevel(float terrain_base, float terrain_higher,
        float steepness, float height_select);
    virtual float baseTerrainLevelFromNoise(v2s16 p);
    virtual float baseTerrainLevelFromMap(v2s16 p);
    virtual float baseTerrainLevelFromMap(int index);
 
    s16 find_stone_level(v2s16 p2d);
    bool block_is_underground(u64 seed, v3s16 blockpos);
 
    float getHumidity(v2s16 p);
    float getTreeAmount(v2s16 p);
    bool getHaveAppleTree(v2s16 p);
    float getMudAmount(int index);
    bool getHaveBeach(int index);
    BiomeV6Type getBiome(v2s16 p);
    BiomeV6Type getBiome(int index, v2s16 p);
 
    u32 get_blockseed(u64 seed, v3s16 p);
 
    virtual void calculateNoise();
    int generateGround();
    void addMud();
    void flowMud(s16 &mudflow_minpos, s16 &mudflow_maxpos);
    void moveMud(u32 remove_index, u32 place_index,
        u32 above_remove_index, v2s16 pos, v3s16 em);
    void growGrass();
    void placeTreesAndJungleGrass();
    virtual void generateCaves(int max_stone_y);
};