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comparison Engine/Random.cpp @ 2499:68cdef6879a0

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engine folder
author Ritor1
date Fri, 19 Sep 2014 02:57:42 +0600
parents
children c674d547cc7c
comparison
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2498:92eeeb5200f2 2499:68cdef6879a0
1 #define _CRTDBG_MAP_ALLOC
2 #include <stdlib.h>
3 #include <crtdbg.h>
4
5 #define _CRT_SECURE_NO_WARNINGS
6 #include <math.h>
7
8 #include "Random.h"
9 #include "OurMath.h"
10
11
12
13
14 struct Random *pRnd=new Random(); // idb
15
16
17
18
19
20 //----- (004BE59E) --------------------------------------------------------
21 void Random::SetRange(int min, int max)
22 {
23 this->min = min;
24 this->range = max - min;
25 }
26
27 //----- (004BE5B1) --------------------------------------------------------
28 double Random::GetRandom()
29 {
30 Random *v1; // esi@1
31 double v2; // st7@1
32 double v3; // st7@1
33
34 v1 = this;
35 this->field_0[3] = this->field_0[2];
36 this->field_0[2] = this->field_0[1];
37 v2 = this->field_0[0];
38 this->field_0[1] = v2;
39 v3 = this->field_0[3] * 1492.0
40 + this->field_0[2] * 1776.0
41 + this->field_0[3] * 2111111111.0
42 + v2 * 5115.0
43 + this->field_0[4];
44 v1->field_0[0] = v3 - floor(v3);
45 v1->field_0[4] = floor(v3) * 2.328306436538696e-10;
46 return v1->field_0[0];
47 }
48
49 //----- (004BE623) --------------------------------------------------------
50 int Random::GetInRange()
51 {
52 // Random *v1; // esi@1
53 float v2; // ST10_4@1
54 // double v3; // ST04_8@1
55 int floored_random; // ecx@1
56
57 v2 = GetRandom() * (double)this->range;
58 floored_random = bankersRounding(v2);
59 if ( floored_random >= this->range )
60 floored_random = this->range;
61 return floored_random + this->min;
62 }
63
64 //----- (004BE65D) --------------------------------------------------------
65 void Random::Initialize(int seed)
66 {
67 int v2; // eax@1
68 Random *this_; // esi@1
69 signed int v4; // ecx@3
70 unsigned int v5; // eax@4
71 signed int v6; // edi@5
72
73 v2 = seed;
74 this_ = this;
75 if ( !seed )
76 v2 = -1;
77 v4 = 0;
78 do
79 {
80 v5 = (((v2 << 13) ^ (unsigned int)v2) >> 17) ^ (v2 << 13) ^ v2;
81 v2 = 32 * v5 ^ v5;
82 this_->field_0[v4++] = (double)(unsigned int)v2 * 2.328306436538696e-10;
83 }
84 while ( v4 < 5 );
85 v6 = 19;
86 do
87 {
88 GetRandom();
89 --v6;
90 }
91 while ( v6 );
92 }
93