mirror of https://github.com/AxioDL/metaforce.git
78 lines
1.5 KiB
C++
78 lines
1.5 KiB
C++
#ifndef RETRO_CRANDOM16_HPP
|
|
#define RETRO_CRANDOM16_HPP
|
|
|
|
#include "GCNTypes.hpp"
|
|
|
|
namespace urde
|
|
{
|
|
|
|
|
|
class CRandom16
|
|
{
|
|
u32 m_seed;
|
|
static CRandom16* g_randomNumber;
|
|
public:
|
|
CRandom16() = default;
|
|
CRandom16(u32 p) : 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);
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
#endif // RETRO_CRANDOM16_HPP
|