random_func.cpp
Go to the documentation of this file.00001
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00012 #include "../stdafx.h"
00013 #include "random_func.hpp"
00014 #include "bitmath_func.hpp"
00015
00016 Randomizer _random, _interactive_random;
00017
00018 uint32 Randomizer::Next()
00019 {
00020 const uint32 s = this->state[0];
00021 const uint32 t = this->state[1];
00022
00023 this->state[0] = s + ROR(t ^ 0x1234567F, 7) + 1;
00024 return this->state[1] = ROR(s, 3) - 1;
00025 }
00026
00027 uint32 Randomizer::Next(uint16 max)
00028 {
00029 return GB(this->Next(), 0, 16) * max >> 16;
00030 }
00031
00032 void Randomizer::SetSeed(uint32 seed)
00033 {
00034 this->state[0] = seed;
00035 this->state[1] = seed;
00036 }
00037
00038 void SetRandomSeed(uint32 seed)
00039 {
00040 _random.SetSeed(seed);
00041 _interactive_random.SetSeed(seed * 0x1234567);
00042 }
00043
00044 #ifdef RANDOM_DEBUG
00045 #include "../network/network.h"
00046 #include "../network/network_internal.h"
00047 #include "../company_func.h"
00048
00049 uint32 DoRandom(int line, const char *file)
00050 {
00051 if (_networking && (!_network_server || (NetworkClientSocket::IsValidID(0) && NetworkClientSocket::Get(0)->status != STATUS_INACTIVE))) {
00052 printf("Random [%d/%d] %s:%d\n", _frame_counter, (byte)_current_company, file, line);
00053 }
00054
00055 return _random.Next();
00056 }
00057
00058 uint DoRandomRange(uint max, int line, const char *file)
00059 {
00060 return GB(DoRandom(line, file), 0, 16) * max >> 16;
00061 }
00062 #endif