diff options
Diffstat (limited to 'src/libjin/math/random.cpp')
| -rw-r--r-- | src/libjin/math/random.cpp | 94 |
1 files changed, 47 insertions, 47 deletions
diff --git a/src/libjin/math/random.cpp b/src/libjin/math/random.cpp index 5f3b28c..288f6c8 100644 --- a/src/libjin/math/random.cpp +++ b/src/libjin/math/random.cpp @@ -4,51 +4,51 @@ namespace JinEngine { - namespace Math - { - - RandomGenerator::RandomGenerator(uint32 seed) - : mSeed(seed) - { - } - - uint32 RandomGenerator::rand() - { - unsigned int next = mSeed; - uint32 result; - - next *= 1103515245; - next += 12345; - result = (unsigned int)(next / 65536) % 2048; - - next *= 1103515245; - next += 12345; - result <<= 10; - result ^= (unsigned int)(next / 65536) % 1024; - - next *= 1103515245; - next += 12345; - result <<= 10; - result ^= (unsigned int)(next / 65536) % 1024; - - mSeed = next; - - return result; - } - - uint32 RandomGenerator::rand(uint32 min, uint32 max) - { - uint32 n = rand(); - return n % (max - min + 1) + min; - } - - float RandomGenerator::randf(float min, float max, int ac) - { - float floor = 0, ceil = max + reverse<float>(min); - uint32 a = pow(10.f, ac); - uint32 n = rand(floor*a, ceil*a); - return (float)n / a + min; - } - - } + namespace Math + { + + RandomGenerator::RandomGenerator(uint32 seed) + : mSeed(seed) + { + } + + uint32 RandomGenerator::rand() + { + unsigned int next = mSeed; + uint32 result; + + next *= 1103515245; + next += 12345; + result = (unsigned int)(next / 65536) % 2048; + + next *= 1103515245; + next += 12345; + result <<= 10; + result ^= (unsigned int)(next / 65536) % 1024; + + next *= 1103515245; + next += 12345; + result <<= 10; + result ^= (unsigned int)(next / 65536) % 1024; + + mSeed = next; + + return result; + } + + uint32 RandomGenerator::rand(uint32 min, uint32 max) + { + uint32 n = rand(); + return n % (max - min + 1) + min; + } + + float RandomGenerator::randf(float min, float max, int ac) + { + float floor = 0, ceil = max + reverse<float>(min); + uint32 a = pow(10.f, ac); + uint32 n = rand(floor*a, ceil*a); + return (float)n / a + min; + } + + } }
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