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2499
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1 #define _CRTDBG_MAP_ALLOC
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2 #include <stdlib.h>
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3 #include <crtdbg.h>
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4
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5 #define _CRT_SECURE_NO_WARNINGS
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6 #include <math.h>
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7
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8 #include "Random.h"
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9 #include "OurMath.h"
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10
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11
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12
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13
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14 struct Random *pRnd=new Random(); // idb
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15
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16
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17
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18
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19
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20 //----- (004BE59E) --------------------------------------------------------
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21 void Random::SetRange(int min, int max)
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22 {
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23 this->min = min;
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24 this->range = max - min;
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25 }
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26
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27 //----- (004BE5B1) --------------------------------------------------------
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28 double Random::GetRandom()
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29 {
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30 Random *v1; // esi@1
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31 double v2; // st7@1
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32 double v3; // st7@1
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33
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34 v1 = this;
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35 this->field_0[3] = this->field_0[2];
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36 this->field_0[2] = this->field_0[1];
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37 v2 = this->field_0[0];
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38 this->field_0[1] = v2;
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39 v3 = this->field_0[3] * 1492.0
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40 + this->field_0[2] * 1776.0
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41 + this->field_0[3] * 2111111111.0
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42 + v2 * 5115.0
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43 + this->field_0[4];
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44 v1->field_0[0] = v3 - floor(v3);
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45 v1->field_0[4] = floor(v3) * 2.328306436538696e-10;
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46 return v1->field_0[0];
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47 }
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48
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49 //----- (004BE623) --------------------------------------------------------
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50 int Random::GetInRange()
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51 {
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52 // Random *v1; // esi@1
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53 float v2; // ST10_4@1
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54 // double v3; // ST04_8@1
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55 int floored_random; // ecx@1
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56
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57 v2 = GetRandom() * (double)this->range;
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58 floored_random = bankersRounding(v2);
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59 if ( floored_random >= this->range )
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60 floored_random = this->range;
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61 return floored_random + this->min;
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62 }
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63
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64 //----- (004BE65D) --------------------------------------------------------
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65 void Random::Initialize(int seed)
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66 {
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67 int v2; // eax@1
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68 Random *this_; // esi@1
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69 signed int v4; // ecx@3
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70 unsigned int v5; // eax@4
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71 signed int v6; // edi@5
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72
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73 v2 = seed;
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74 this_ = this;
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75 if ( !seed )
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76 v2 = -1;
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77 v4 = 0;
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78 do
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79 {
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80 v5 = (((v2 << 13) ^ (unsigned int)v2) >> 17) ^ (v2 << 13) ^ v2;
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81 v2 = 32 * v5 ^ v5;
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82 this_->field_0[v4++] = (double)(unsigned int)v2 * 2.328306436538696e-10;
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83 }
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84 while ( v4 < 5 );
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85 v6 = 19;
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86 do
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87 {
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88 GetRandom();
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89 --v6;
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90 }
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91 while ( v6 );
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92 }
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93
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