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annotate OurMath.h @ 2050:bf89a2e9eea1

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LuaClass.h
author Ritor1
date Fri, 29 Nov 2013 01:16:48 +0600
parents 7a9477135943
children 8e9be4fa33a8
rev   line source
2037
7a9477135943 Renamed Math.h -> OurMath.h (file resolution was sometimes ambiguous)
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1 #pragma once
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2
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3 #include <cassert>
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4 #include <limits>
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5
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6 /* 186 */
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7 #pragma pack(push, 1)
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8 struct stru193_math
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9 {
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10 stru193_math();
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11 int Cos(int angle);
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12 unsigned int Atan2(int x, int y);
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13 int Sin(int angle);
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14
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15 int pTanTable[520];
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16 int pCosTable[520];
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17 int pInvCosTable[520];
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18 static const unsigned int uIntegerPi = 1024;
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19 static const unsigned int uIntegerHalfPi = 512;
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20 static const unsigned int uIntegerDoublePi = 2048;
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21 static const unsigned int uDoublePiMask = 2047;
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22 static const unsigned int uPiMask = 1023;
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23 static const unsigned int uHalfPiMask = 511;
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24 };
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25 #pragma pack(pop)
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26
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27 __int64 fixpoint_mul(int, int);
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28 __int64 fixpoint_dot(int x1, int x2, int y1, int y2, int z1, int z2);
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29 __int64 fixpoint_div(int, int);
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30 __int64 fixpoint_sub_unknown(int, int);
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31 int fixpoint_from_float(float value);
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32 int fixpoint_from_int(int lhv, int rhv);
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33
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34 template <typename FloatType>
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35 inline int bankersRounding(
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36 const FloatType& value
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37 ) {
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38 assert("Method unsupported for this type" && false);
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39 return value;
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40 }
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41
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42 template<> inline int bankersRounding<float>(const float& inValue)
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43 {
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44 union Cast
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45 {
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46 double d;
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47 long l;
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48 };
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49 volatile Cast c;
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50 c.d = inValue + 6755399441055744.0;
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51 return c.l;
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52 }
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53
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54 #pragma push_macro("max")
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55 #undef max
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56 template<> inline int bankersRounding<double>(const double& inValue)
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57 {
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58 double maxValue = std::numeric_limits<int>::max();
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59 assert(maxValue - 6755399441055744.0 >= inValue);
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60 union Cast
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61 {
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62 double d;
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63 long l;
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64 };
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65 volatile Cast c;
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66 c.d = inValue + 6755399441055744.0;
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67 return c.l;
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68 }
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69 #pragma pop_macro("max")
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70
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71 extern struct stru193_math *stru_5C6E00;