Mercurial > mm7

annotate Math.h @ 1530:dec48a151390

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Слияние
author Ritor1
date Fri, 06 Sep 2013 16:42:32 +0600
parents f0551cd4cbc9
children 499761153844
rev   line source
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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 int fixpoint_sub0(int, int);
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28 int fixpoint_div(int, int);
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29 int fixpoint_mul(int, int);
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30 int fixpoint_from_float(float value);
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31
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32 template <typename FloatType>
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33 inline int bankersRounding(
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34 const FloatType& value
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35 ) {
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36 assert("Method unsupported for this type" && false);
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37 return value;
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38 }
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39
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40 template<> inline int bankersRounding<float>(const float& inValue)
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41 {
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42 union Cast
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43 {
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44 double d;
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45 long l;
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46 };
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47 volatile Cast c;
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48 c.d = inValue + 6755399441055744.0;
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49 return c.l;
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50 }
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51
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52 #pragma push_macro("max")
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53 #undef max
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54 template<> inline int bankersRounding<double>(const double& inValue)
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55 {
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56 double maxValue = std::numeric_limits<int>::max();
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57 assert(maxValue - 6755399441055744.0 >= inValue);
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58 union Cast
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59 {
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60 double d;
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61 long l;
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62 };
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63 volatile Cast c;
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64 c.d = inValue + 6755399441055744.0;
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65 return c.l;
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66 }
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67 #pragma pop_macro("max")
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68
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69 extern struct stru193_math *stru_5C6E00;