3 Copyright (C) 2014-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
4 Copyright (C) 2014-2017 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)
39 // TODO(hmmmm): Decide whether this is obsolete or will be used in the future
48 class Biome : public ObjDef, public NodeResolver {
55 content_t c_water_top;
57 content_t c_river_water;
72 virtual void resolveNodeNames();
85 virtual void readParams(const Settings *settings) = 0;
86 virtual void writeParams(Settings *settings) const = 0;
87 virtual ~BiomeParams() = default;
94 virtual ~BiomeGen() = default;
96 virtual BiomeGenType getType() const = 0;
98 // Calculates the biome at the exact position provided. This function can
99 // be called at any time, but may be less efficient than the latter methods,
100 // depending on implementation.
101 virtual Biome *calcBiomeAtPoint(v3s16 pos) const = 0;
103 // Computes any intermediate results needed for biome generation. Must be
104 // called before using any of: getBiomes, getBiomeAtPoint, or getBiomeAtIndex.
105 // Calling this invalidates the previous results stored in biomemap.
106 virtual void calcBiomeNoise(v3s16 pmin) = 0;
108 // Gets all biomes in current chunk using each corresponding element of
109 // heightmap as the y position, then stores the results by biome index in
110 // biomemap (also returned)
111 virtual biome_t *getBiomes(s16 *heightmap) = 0;
113 // Gets a single biome at the specified position, which must be contained
114 // in the region formed by m_pmin and (m_pmin + m_csize - 1).
115 virtual Biome *getBiomeAtPoint(v3s16 pos) const = 0;
117 // Same as above, but uses a raw numeric index correlating to the (x,z) position.
118 virtual Biome *getBiomeAtIndex(size_t index, s16 y) const = 0;
120 // Result of calcBiomes bulk computation.
121 biome_t *biomemap = nullptr;
124 BiomeManager *m_bmgr = nullptr;
131 //// BiomeGen implementations
135 // Original biome algorithm (Whittaker's classification + surface height)
138 struct BiomeParamsOriginal : public BiomeParams {
139 BiomeParamsOriginal() :
140 np_heat(50, 50, v3f(1000.0, 1000.0, 1000.0), 5349, 3, 0.5, 2.0),
141 np_humidity(50, 50, v3f(1000.0, 1000.0, 1000.0), 842, 3, 0.5, 2.0),
142 np_heat_blend(0, 1.5, v3f(8.0, 8.0, 8.0), 13, 2, 1.0, 2.0),
143 np_humidity_blend(0, 1.5, v3f(8.0, 8.0, 8.0), 90003, 2, 1.0, 2.0)
147 virtual void readParams(const Settings *settings);
148 virtual void writeParams(Settings *settings) const;
151 NoiseParams np_humidity;
152 NoiseParams np_heat_blend;
153 NoiseParams np_humidity_blend;
156 class BiomeGenOriginal : public BiomeGen {
158 BiomeGenOriginal(BiomeManager *biomemgr,
159 BiomeParamsOriginal *params, v3s16 chunksize);
160 virtual ~BiomeGenOriginal();
162 BiomeGenType getType() const { return BIOMEGEN_ORIGINAL; }
164 Biome *calcBiomeAtPoint(v3s16 pos) const;
165 void calcBiomeNoise(v3s16 pmin);
167 biome_t *getBiomes(s16 *heightmap);
168 Biome *getBiomeAtPoint(v3s16 pos) const;
169 Biome *getBiomeAtIndex(size_t index, s16 y) const;
171 Biome *calcBiomeFromNoise(float heat, float humidity, s16 y) const;
177 BiomeParamsOriginal *m_params;
180 Noise *noise_humidity;
181 Noise *noise_heat_blend;
182 Noise *noise_humidity_blend;
190 class BiomeManager : public ObjDefManager {
192 BiomeManager(Server *server);
193 virtual ~BiomeManager() = default;
195 const char *getObjectTitle() const
200 static Biome *create(BiomeType type)
205 BiomeGen *createBiomeGen(BiomeGenType type, BiomeParams *params, v3s16 chunksize)
208 case BIOMEGEN_ORIGINAL:
209 return new BiomeGenOriginal(this,
210 (BiomeParamsOriginal *)params, chunksize);
216 static BiomeParams *createBiomeParams(BiomeGenType type)
219 case BIOMEGEN_ORIGINAL:
220 return new BiomeParamsOriginal;
226 virtual void clear();