3 Copyright (C) 2014-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
4 Copyright (C) 2014-2018 paramat
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
37 #define BIOME_NONE ((biome_t)0)
43 class Biome : public ObjDef, public NodeResolver {
50 content_t c_water_top;
52 content_t c_river_water;
55 content_t c_cave_liquid;
68 virtual void resolveNodeNames();
81 virtual void readParams(const Settings *settings) = 0;
82 virtual void writeParams(Settings *settings) const = 0;
83 virtual ~BiomeParams() = default;
90 virtual ~BiomeGen() = default;
92 virtual BiomeGenType getType() const = 0;
94 // Calculates the biome at the exact position provided. This function can
95 // be called at any time, but may be less efficient than the latter methods,
96 // depending on implementation.
97 virtual Biome *calcBiomeAtPoint(v3s16 pos) const = 0;
99 // Computes any intermediate results needed for biome generation. Must be
100 // called before using any of: getBiomes, getBiomeAtPoint, or getBiomeAtIndex.
101 // Calling this invalidates the previous results stored in biomemap.
102 virtual void calcBiomeNoise(v3s16 pmin) = 0;
104 // Gets all biomes in current chunk using each corresponding element of
105 // heightmap as the y position, then stores the results by biome index in
106 // biomemap (also returned)
107 virtual biome_t *getBiomes(s16 *heightmap, v3s16 pmin) = 0;
109 // Gets a single biome at the specified position, which must be contained
110 // in the region formed by m_pmin and (m_pmin + m_csize - 1).
111 virtual Biome *getBiomeAtPoint(v3s16 pos) const = 0;
113 // Same as above, but uses a raw numeric index correlating to the (x,z) position.
114 virtual Biome *getBiomeAtIndex(size_t index, v3s16 pos) const = 0;
116 // Result of calcBiomes bulk computation.
117 biome_t *biomemap = nullptr;
120 BiomeManager *m_bmgr = nullptr;
127 //// BiomeGen implementations
131 // Original biome algorithm (Whittaker's classification + surface height)
134 struct BiomeParamsOriginal : public BiomeParams {
135 BiomeParamsOriginal() :
136 np_heat(50, 50, v3f(1000.0, 1000.0, 1000.0), 5349, 3, 0.5, 2.0),
137 np_humidity(50, 50, v3f(1000.0, 1000.0, 1000.0), 842, 3, 0.5, 2.0),
138 np_heat_blend(0, 1.5, v3f(8.0, 8.0, 8.0), 13, 2, 1.0, 2.0),
139 np_humidity_blend(0, 1.5, v3f(8.0, 8.0, 8.0), 90003, 2, 1.0, 2.0)
143 virtual void readParams(const Settings *settings);
144 virtual void writeParams(Settings *settings) const;
147 NoiseParams np_humidity;
148 NoiseParams np_heat_blend;
149 NoiseParams np_humidity_blend;
152 class BiomeGenOriginal : public BiomeGen {
154 BiomeGenOriginal(BiomeManager *biomemgr,
155 BiomeParamsOriginal *params, v3s16 chunksize);
156 virtual ~BiomeGenOriginal();
158 BiomeGenType getType() const { return BIOMEGEN_ORIGINAL; }
160 Biome *calcBiomeAtPoint(v3s16 pos) const;
161 void calcBiomeNoise(v3s16 pmin);
163 biome_t *getBiomes(s16 *heightmap, v3s16 pmin);
164 Biome *getBiomeAtPoint(v3s16 pos) const;
165 Biome *getBiomeAtIndex(size_t index, v3s16 pos) const;
167 Biome *calcBiomeFromNoise(float heat, float humidity, v3s16 pos) const;
173 BiomeParamsOriginal *m_params;
176 Noise *noise_humidity;
177 Noise *noise_heat_blend;
178 Noise *noise_humidity_blend;
186 class BiomeManager : public ObjDefManager {
188 BiomeManager(Server *server);
189 virtual ~BiomeManager() = default;
191 const char *getObjectTitle() const
196 static Biome *create(BiomeType type)
201 BiomeGen *createBiomeGen(BiomeGenType type, BiomeParams *params, v3s16 chunksize)
204 case BIOMEGEN_ORIGINAL:
205 return new BiomeGenOriginal(this,
206 (BiomeParamsOriginal *)params, chunksize);
212 static BiomeParams *createBiomeParams(BiomeGenType type)
215 case BIOMEGEN_ORIGINAL:
216 return new BiomeParamsOriginal;
222 virtual void clear();
224 // For BiomeGen type 'BiomeGenOriginal'
225 float getHeatAtPosOriginal(v3s16 pos, NoiseParams &np_heat,
226 NoiseParams &np_heat_blend, u64 seed);
227 float getHumidityAtPosOriginal(v3s16 pos, NoiseParams &np_humidity,
228 NoiseParams &np_humidity_blend, u64 seed);
229 Biome *getBiomeFromNoiseOriginal(float heat, float humidity, v3s16 pos);