mirror of https://github.com/AxioDL/metaforce.git
60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
#pragma once
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#include "Runtime/GCNTypes.hpp"
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namespace metaforce {
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class CRandom16 {
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s32 m_seed;
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static CRandom16* g_randomNumber;
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public:
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explicit CRandom16(s32 seed = 99) : m_seed(seed) {}
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s32 Next() {
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IncrementNumNextCalls();
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m_seed = (m_seed * 0x41c64e6d) + 0x00003039;
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SetLastSeed(m_seed);
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return (m_seed >> 16) & 0xffff;
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}
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s32 GetSeed() const { return m_seed; }
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void SetSeed(s32 seed) { m_seed = seed; }
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float Float() { return Next() * 0.000015259022f; }
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float Range(float min, float max) { return min + Float() * (max - min); }
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s32 Range(s32 min, s32 max) { return min + (Next() % ((max - min) + 1)); }
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static CRandom16* GetRandomNumber() { return g_randomNumber; }
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static void SetRandomNumber(CRandom16* rnd) { g_randomNumber = rnd; }
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static void IncrementNumNextCalls();
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static u32 GetNumNextCalls();
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static void ResetNumNextCalls();
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static u32 GetLastSeed();
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static void SetLastSeed(u32 seed);
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};
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class CGlobalRandom {
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CRandom16& m_random;
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CGlobalRandom* m_prev;
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static CGlobalRandom* g_currentGlobalRandom;
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public:
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CGlobalRandom(CRandom16& rand) : m_random(rand), m_prev(g_currentGlobalRandom) {
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g_currentGlobalRandom = this;
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CRandom16::SetRandomNumber(&m_random);
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}
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~CGlobalRandom() {
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g_currentGlobalRandom = m_prev;
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if (m_prev)
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CRandom16::SetRandomNumber(&m_prev->m_random);
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else
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CRandom16::SetRandomNumber(nullptr);
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}
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};
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} // namespace metaforce
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