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AP_Math: added get_random16()

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Andrew Tridgell
2016-12-02 09:49:38 +11:00
parent cd57422eed
commit a8d10e8c2c
2 changed files with 18 additions and 0 deletions
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libraries/AP_Math/AP_Math.cpp
+14
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@@ -174,3 +174,17 @@ template int constrain_value<int>(const int amt, const int low, const int high);
template short constrain_value<short>(const short amt, const short low, const short high);
template float constrain_value<float>(const float amt, const float low, const float high);
template double constrain_value<double>(const double amt, const double low, const double high);
/*
simple 16 bit random number generator
*/
uint16_t get_random16(void)
{
static uint32_t m_z = 1234;
static uint32_t m_w = 76542;
m_z = 36969 * (m_z & 65535) + (m_z >> 16);
m_w = 18000 * (m_w & 65535) + (m_w >> 16);
return ((m_z << 16) + m_w) & 0xFFFF;
}