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comparison Engine/OurMath.h @ 2499:68cdef6879a0

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engine folder
author Ritor1
date Fri, 19 Sep 2014 02:57:42 +0600
parents
children 1bcadc6dd203
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2498:92eeeb5200f2 2499:68cdef6879a0
1 #pragma once
2
3 #include <cassert>
4 #include <limits>
5
6 /* 186 */
7 #pragma pack(push, 1)
8 struct stru193_math
9 {
10 stru193_math();
11 int Cos(int angle);
12 unsigned int Atan2(int x, int y);
13 int Sin(int angle);
14
15 int pTanTable[520];
16 int pCosTable[520];
17 int pInvCosTable[520];
18 static const unsigned int uIntegerPi = 1024;
19 static const unsigned int uIntegerHalfPi = 512;
20 static const unsigned int uIntegerDoublePi = 2048;
21 static const unsigned int uDoublePiMask = 2047;
22 static const unsigned int uPiMask = 1023;
23 static const unsigned int uHalfPiMask = 511;
24 };
25 #pragma pack(pop)
26
27 __int64 fixpoint_mul(int, int);
28 __int64 fixpoint_dot(int x1, int x2, int y1, int y2, int z1, int z2);
29 __int64 fixpoint_div(int, int);
30 __int64 fixpoint_sub_unknown(int, int);
31 int fixpoint_from_float(float value);
32 int fixpoint_from_int(int lhv, int rhv);
33 int integer_sqrt(int val);
34 int __fastcall GetDiceResult(unsigned int uNumDice, unsigned int uDiceSides); // idb
35 inline int round_to_int(float x) { return (int)floor(x + 0.5f); }
36
37 template <typename FloatType>
38 inline int bankersRounding(const FloatType& value)
39 {
40 assert("Method unsupported for this type" && false);
41 return value;
42 }
43
44 template<> inline int bankersRounding<float>(const float& inValue)
45 {
46 union Cast
47 {
48 double d;
49 long l;
50 };
51 volatile Cast c;
52 c.d = inValue + 6755399441055744.0;
53 return c.l;
54 }
55
56 #pragma push_macro("max")
57 #undef max
58 template<> inline int bankersRounding<double>(const double& inValue)
59 {
60 double maxValue = std::numeric_limits<int>::max();
61 assert(maxValue - 6755399441055744.0 >= inValue);
62 union Cast
63 {
64 double d;
65 long l;
66 };
67 volatile Cast c;
68 c.d = inValue + 6755399441055744.0;
69 return c.l;
70 }
71 #pragma pop_macro("max")
72
73 extern struct stru193_math *stru_5C6E00;