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