Mercurial > mm7

comparison Random.cpp @ 0:9c0607679772

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init
author Ritor1
date Sat, 12 Jan 2013 09:45:18 +0600
parents
children 93c6b78abf35
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-1:000000000000 0:9c0607679772
1 #include <math.h>
2
3 #include "Random.h"
4
5 #include "mm7_data.h"
6
7
8
9
10 struct Random *pRnd; // idb
11
12
13
14
15
16 //----- (004BE59E) --------------------------------------------------------
17 void Random::SetRange(int min, int max)
18 {
19 this->min = min;
20 this->range = max - min;
21 }
22
23 //----- (004BE5B1) --------------------------------------------------------
24 double Random::GetRandom()
25 {
26 Random *v1; // esi@1
27 double v2; // st7@1
28 double v3; // st7@1
29
30 v1 = this;
31 this->field_0[3] = this->field_0[2];
32 this->field_0[2] = this->field_0[1];
33 v2 = this->field_0[0];
34 this->field_0[1] = v2;
35 v3 = this->field_0[3] * 1492.0
36 + this->field_0[2] * 1776.0
37 + this->field_0[3] * 2111111111.0
38 + v2 * 5115.0
39 + this->field_0[4];
40 v1->field_0[0] = v3 - floor(v3);
41 v1->field_0[4] = v3 * 2.328306436538696e-10;
42 return v3 - v3;
43 }
44
45 //----- (004BE623) --------------------------------------------------------
46 int Random::GetInRange()
47 {
48 Random *v1; // esi@1
49 float v2; // ST10_4@1
50 double v3; // ST04_8@1
51 int floored_random; // ecx@1
52
53 v1 = this;
54 v2 = GetRandom() * (double)this->range;
55 v3 = v2 + 6.7553994e15;
56 floored_random = LODWORD(v3);
57 if ( SLODWORD(v3) >= v1->range )
58 floored_random = v1->range;
59 return floored_random + v1->min;
60 }
61
62 //----- (004BE65D) --------------------------------------------------------
63 void Random::Initialize(int seed)
64 {
65 int v2; // eax@1
66 Random *this_; // esi@1
67 signed int v4; // ecx@3
68 unsigned int v5; // eax@4
69 signed int v6; // edi@5
70
71 v2 = seed;
72 this_ = this;
73 if ( !seed )
74 v2 = -1;
75 v4 = 0;
76 do
77 {
78 v5 = (((v2 << 13) ^ (unsigned int)v2) >> 17) ^ (v2 << 13) ^ v2;
79 v2 = 32 * v5 ^ v5;
80 this_->field_0[v4++] = (double)(unsigned int)v2 * 2.328306436538696e-10;
81 }
82 while ( v4 < 5 );
83 v6 = 19;
84 do
85 {
86 GetRandom();
87 --v6;
88 }
89 while ( v6 );
90 }
91