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- /*
- Minetest
- Copyright (C) 2014-2020 paramat
- Copyright (C) 2014-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
- 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 "objdef.h"
- #include "nodedef.h"
- #include "noise.h"
- class Server;
- class Settings;
- class BiomeManager;
- ////
- //// Biome
- ////
- typedef u16 biome_t;
- #define BIOME_NONE ((biome_t)0)
- enum BiomeType {
- BIOMETYPE_NORMAL,
- };
- class Biome : public ObjDef, public NodeResolver {
- public:
- ObjDef *clone() const;
- u32 flags;
- content_t c_top;
- content_t c_filler;
- content_t c_stone;
- content_t c_water_top;
- content_t c_water;
- content_t c_river_water;
- content_t c_riverbed;
- content_t c_dust;
- std::vector<content_t> c_cave_liquid;
- content_t c_dungeon;
- content_t c_dungeon_alt;
- content_t c_dungeon_stair;
- s16 depth_top;
- s16 depth_filler;
- s16 depth_water_top;
- s16 depth_riverbed;
- v3s16 min_pos;
- v3s16 max_pos;
- float heat_point;
- float humidity_point;
- s16 vertical_blend;
- virtual void resolveNodeNames();
- };
- ////
- //// BiomeGen
- ////
- enum BiomeGenType {
- BIOMEGEN_ORIGINAL,
- };
- struct BiomeParams {
- virtual void readParams(const Settings *settings) = 0;
- virtual void writeParams(Settings *settings) const = 0;
- virtual ~BiomeParams() = default;
- s32 seed;
- };
- // WARNING: this class is not thread-safe
- class BiomeGen {
- public:
- virtual ~BiomeGen() = default;
- virtual BiomeGenType getType() const = 0;
- // Clone this BiomeGen and set a the new BiomeManager to be used by the copy
- virtual BiomeGen *clone(BiomeManager *biomemgr) const = 0;
- // Check that the internal chunk size is what the mapgen expects, just to be sure.
- inline void assertChunkSize(v3s16 expect) const
- {
- FATAL_ERROR_IF(m_csize != expect, "Chunk size mismatches");
- }
- // Calculates the biome at the exact position provided. This function can
- // be called at any time, but may be less efficient than the latter methods,
- // depending on implementation.
- virtual Biome *calcBiomeAtPoint(v3s16 pos) const = 0;
- // Computes any intermediate results needed for biome generation. Must be
- // called before using any of: getBiomes, getBiomeAtPoint, or getBiomeAtIndex.
- // Calling this invalidates the previous results stored in biomemap.
- virtual void calcBiomeNoise(v3s16 pmin) = 0;
- // Gets all biomes in current chunk using each corresponding element of
- // heightmap as the y position, then stores the results by biome index in
- // biomemap (also returned)
- virtual biome_t *getBiomes(s16 *heightmap, v3s16 pmin) = 0;
- // Gets a single biome at the specified position, which must be contained
- // in the region formed by m_pmin and (m_pmin + m_csize - 1).
- virtual Biome *getBiomeAtPoint(v3s16 pos) const = 0;
- // Same as above, but uses a raw numeric index correlating to the (x,z) position.
- virtual Biome *getBiomeAtIndex(size_t index, v3s16 pos) const = 0;
- // Result of calcBiomes bulk computation.
- biome_t *biomemap = nullptr;
- protected:
- BiomeManager *m_bmgr = nullptr;
- v3s16 m_pmin;
- v3s16 m_csize;
- };
- ////
- //// BiomeGen implementations
- ////
- //
- // Original biome algorithm (Whittaker's classification + surface height)
- //
- struct BiomeParamsOriginal : public BiomeParams {
- BiomeParamsOriginal() :
- np_heat(50, 50, v3f(1000.0, 1000.0, 1000.0), 5349, 3, 0.5, 2.0),
- np_humidity(50, 50, v3f(1000.0, 1000.0, 1000.0), 842, 3, 0.5, 2.0),
- np_heat_blend(0, 1.5, v3f(8.0, 8.0, 8.0), 13, 2, 1.0, 2.0),
- np_humidity_blend(0, 1.5, v3f(8.0, 8.0, 8.0), 90003, 2, 1.0, 2.0)
- {
- }
- virtual void readParams(const Settings *settings);
- virtual void writeParams(Settings *settings) const;
- NoiseParams np_heat;
- NoiseParams np_humidity;
- NoiseParams np_heat_blend;
- NoiseParams np_humidity_blend;
- };
- class BiomeGenOriginal : public BiomeGen {
- public:
- BiomeGenOriginal(BiomeManager *biomemgr,
- const BiomeParamsOriginal *params, v3s16 chunksize);
- virtual ~BiomeGenOriginal();
- BiomeGenType getType() const { return BIOMEGEN_ORIGINAL; }
- BiomeGen *clone(BiomeManager *biomemgr) const;
- // Slower, meant for Script API use
- float calcHeatAtPoint(v3s16 pos) const;
- float calcHumidityAtPoint(v3s16 pos) const;
- Biome *calcBiomeAtPoint(v3s16 pos) const;
- void calcBiomeNoise(v3s16 pmin);
- biome_t *getBiomes(s16 *heightmap, v3s16 pmin);
- Biome *getBiomeAtPoint(v3s16 pos) const;
- Biome *getBiomeAtIndex(size_t index, v3s16 pos) const;
- Biome *calcBiomeFromNoise(float heat, float humidity, v3s16 pos) const;
- float *heatmap;
- float *humidmap;
- private:
- const BiomeParamsOriginal *m_params;
- Noise *noise_heat;
- Noise *noise_humidity;
- Noise *noise_heat_blend;
- Noise *noise_humidity_blend;
- };
- ////
- //// BiomeManager
- ////
- class BiomeManager : public ObjDefManager {
- public:
- BiomeManager(Server *server);
- virtual ~BiomeManager() = default;
- BiomeManager *clone() const;
- const char *getObjectTitle() const
- {
- return "biome";
- }
- static Biome *create(BiomeType type)
- {
- return new Biome;
- }
- BiomeGen *createBiomeGen(BiomeGenType type, BiomeParams *params, v3s16 chunksize)
- {
- switch (type) {
- case BIOMEGEN_ORIGINAL:
- return new BiomeGenOriginal(this,
- (BiomeParamsOriginal *)params, chunksize);
- default:
- return NULL;
- }
- }
- static BiomeParams *createBiomeParams(BiomeGenType type)
- {
- switch (type) {
- case BIOMEGEN_ORIGINAL:
- return new BiomeParamsOriginal;
- default:
- return NULL;
- }
- }
- virtual void clear();
- private:
- BiomeManager() {};
- Server *m_server;
- };
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