mirror of https://github.com/zeldaret/tp.git
44 lines
780 B
C++
44 lines
780 B
C++
#ifndef JPARANDOM_H
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#define JPARANDOM_H
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#include "dolphin/types.h"
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/**
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* @ingroup jsystem-jparticle
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*
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*/
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struct JPARandom {
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public:
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JPARandom() { mSeed = 0; }
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JPARandom(u32 seed) { mSeed = seed; }
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~JPARandom() {}
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void set_seed(u32 seed) { mSeed = seed; }
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u32 get_rndm_u() { return mSeed = mSeed * 0x19660du + 0x3c6ef35fu; }
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f32 get_rndm_f() {
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union {
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u32 u;
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f32 f;
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} a;
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a.u = ((get_rndm_u() >> 9) | 0x3f800000);
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return a.f - 1.0f;
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}
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f32 get_rndm_zp() {
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f32 f = get_rndm_f();
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return (f + f) - 1.0f;
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}
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f32 get_rndm_zh() {
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return get_rndm_f() - 0.5f;
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}
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s16 get_rndm_ss() { return (s16)(get_rndm_u() >> 16); }
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public:
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u32 mSeed;
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};
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#endif
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