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author | Perttu Ahola <celeron55@gmail.com> | 2011-06-25 16:32:09 +0300 |
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committer | Perttu Ahola <celeron55@gmail.com> | 2011-06-25 16:32:09 +0300 |
commit | aed9e809a19bffdf911f75dd9d718efb8decd2c1 (patch) | |
tree | bce949a0722a7bf007f4c50822dc3f69292e3c05 /src/noise.h | |
parent | e8a731adc502d19a8ae3bfeee5b985f90ab8a507 (diff) | |
download | hax-minetest-server-aed9e809a19bffdf911f75dd9d718efb8decd2c1.tar.gz hax-minetest-server-aed9e809a19bffdf911f75dd9d718efb8decd2c1.zip |
mapgen stuff
Diffstat (limited to 'src/noise.h')
-rw-r--r-- | src/noise.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/noise.h b/src/noise.h index 6e4fedbc4..c8d8985c6 100644 --- a/src/noise.h +++ b/src/noise.h @@ -20,6 +20,45 @@ with this program; if not, write to the Free Software Foundation, Inc., #ifndef NOISE_HEADER #define NOISE_HEADER +#include "debug.h" + +class PseudoRandom +{ +public: + PseudoRandom(): m_next(0) + { + } + PseudoRandom(int seed): m_next(seed) + { + } + void seed(int seed) + { + m_next = seed; + } + // Returns 0...32767 + int next() + { + m_next = m_next * 1103515245 + 12345; + return((unsigned)(m_next/65536) % 32768); + } + int range(int min, int max) + { + if(max-min > 32768/10) + { + //dstream<<"WARNING: PseudoRandom::range: max > 32767"<<std::endl; + assert(0); + } + if(min > max) + { + assert(0); + return max; + } + return (next()%(max-min+1))+min; + } +private: + int m_next; +}; + double easeCurve(double t); // Return value: -1 ... 1 |