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- #pragma once
- #include <AK/SoundEngine/Common/AkTypes.h>
- class CAkRng
- {
- public:
- static constexpr AkUInt64 RANDOM_A = 6364136223846793005ULL;
- static constexpr AkUInt64 RANDOM_C = 1;
- static constexpr AkUInt32 RANDOM_MAX = 0x7FFFFFFF;
-
- CAkRng(AkUInt64 uSeed)
- : m_uSeed(uSeed)
- {}
-
- inline AkUInt64 Seed() const
- {
- return m_uSeed;
- }
-
- inline AkUInt32 Peek() const
- {
- return Peek(m_uSeed);
- }
-
- inline AkUInt32 Random()
- {
- return Random(m_uSeed);
- }
-
- inline AkInt32 RandomInt()
- {
- return RandomInt(m_uSeed);
- }
-
- AkReal32 RandomFloat()
- {
- return (AkReal32)Random(m_uSeed) / (AkReal32)RANDOM_MAX;
- }
-
- static inline AkInt32 Random(AkUInt64 &io_uSeed)
- {
- io_uSeed = io_uSeed * RANDOM_A + RANDOM_C;
- return Peek(io_uSeed);
- }
-
- static inline AkInt32 RandomInt(AkUInt64 &io_uSeed)
- {
- io_uSeed = io_uSeed * RANDOM_A + RANDOM_C;
- return (AkInt32)Peek(io_uSeed);
- }
-
- static inline AkUInt32 Peek(AkUInt64 in_uSeed)
- {
- return (AkUInt32)(in_uSeed >> 33);
- }
- private:
- AkUInt64 m_uSeed;
- };
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