diff options
Diffstat (limited to 'src/mg_biome.h')
| -rw-r--r-- | src/mg_biome.h | 172 |
1 files changed, 158 insertions, 14 deletions
diff --git a/src/mg_biome.h b/src/mg_biome.h index 8d519f808..a10193bc3 100644 --- a/src/mg_biome.h +++ b/src/mg_biome.h @@ -22,14 +22,26 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "objdef.h" #include "nodedef.h" +#include "noise.h" -enum BiomeType -{ - BIOME_NORMAL, - BIOME_LIQUID, - BIOME_NETHER, - BIOME_AETHER, - BIOME_FLAT +class Settings; +class BiomeManager; + +//// +//// Biome +//// + +typedef u8 biome_t; + +#define BIOME_NONE ((biome_t)0) + +// TODO(hmmmm): Decide whether this is obsolete or will be used in the future +enum BiomeType { + BIOMETYPE_NORMAL, + BIOMETYPE_LIQUID, + BIOMETYPE_NETHER, + BIOMETYPE_AETHER, + BIOMETYPE_FLAT, }; class Biome : public ObjDef, public NodeResolver { @@ -42,11 +54,13 @@ public: content_t c_water_top; content_t c_water; content_t c_river_water; + content_t c_riverbed; content_t c_dust; s16 depth_top; s16 depth_filler; s16 depth_water_top; + s16 depth_riverbed; s16 y_min; s16 y_max; @@ -56,10 +70,122 @@ public: virtual void resolveNodeNames(); }; -class BiomeManager : public ObjDefManager { + +//// +//// BiomeGen +//// + +enum BiomeGenType { + BIOMEGEN_ORIGINAL, +}; + +struct BiomeParams { + virtual void readParams(const Settings *settings) = 0; + virtual void writeParams(Settings *settings) const = 0; + virtual ~BiomeParams() {} + + s32 seed; +}; + +class BiomeGen { +public: + virtual ~BiomeGen() {} + virtual BiomeGenType getType() const = 0; + + // 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) = 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, s16 y) const = 0; + + // Result of calcBiomes bulk computation. + biome_t *biomemap; + +protected: + BiomeManager *m_bmgr; + 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: - static const char *OBJECT_TITLE; + BiomeGenOriginal(BiomeManager *biomemgr, + BiomeParamsOriginal *params, v3s16 chunksize); + virtual ~BiomeGenOriginal(); + BiomeGenType getType() const { return BIOMEGEN_ORIGINAL; } + + Biome *calcBiomeAtPoint(v3s16 pos) const; + void calcBiomeNoise(v3s16 pmin); + + biome_t *getBiomes(s16 *heightmap); + Biome *getBiomeAtPoint(v3s16 pos) const; + Biome *getBiomeAtIndex(size_t index, s16 y) const; + + Biome *calcBiomeFromNoise(float heat, float humidity, s16 y) const; + + float *heatmap; + float *humidmap; + +private: + BiomeParamsOriginal *m_params; + + Noise *noise_heat; + Noise *noise_humidity; + Noise *noise_heat_blend; + Noise *noise_humidity_blend; +}; + + +//// +//// BiomeManager +//// + +class BiomeManager : public ObjDefManager { +public: BiomeManager(IGameDef *gamedef); virtual ~BiomeManager(); @@ -73,15 +199,33 @@ public: return new Biome; } - virtual void clear(); + BiomeGen *createBiomeGen(BiomeGenType type, BiomeParams *params, v3s16 chunksize) + { + switch (type) { + case BIOMEGEN_ORIGINAL: + return new BiomeGenOriginal(this, + (BiomeParamsOriginal *)params, chunksize); + default: + return NULL; + } + } - void calcBiomes(s16 sx, s16 sy, float *heat_map, float *humidity_map, - s16 *height_map, u8 *biomeid_map); - Biome *getBiome(float heat, float humidity, s16 y); + static BiomeParams *createBiomeParams(BiomeGenType type) + { + switch (type) { + case BIOMEGEN_ORIGINAL: + return new BiomeParamsOriginal; + default: + return NULL; + } + } + + virtual void clear(); private: IGameDef *m_gamedef; + }; -#endif +#endif |