1 | // This file is a part of Framsticks SDK. http://www.framsticks.com/ |
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2 | // Copyright (C) 1999-2020 Maciej Komosinski and Szymon Ulatowski. |
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3 | // See LICENSE.txt for details. |
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4 | |
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5 | #ifndef _NONSTD_MATH_H_ |
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6 | #define _NONSTD_MATH_H_ |
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7 | |
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8 | |
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9 | #ifdef _MSC_VER |
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10 | #define _USE_MATH_DEFINES //after this is defined, the next #include <math.h> or <cmath> will define M_PI etc. |
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11 | #include <math.h> //w vc2008 dzia³a³o tu <cmath>, ale w vc2010 juz nie bo "co" (jaki inny .h stl'a?) includuje wczeniej <cmath> bez _USE_MATH_DEFINES, a <cmath> includuje <math.h> (ale tylko raz bo ma "include guards" jak kazdy .h) |
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12 | #include <float.h> |
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13 | //#define isnan(x) _isnan(x) //since 2014 we use std::isnan() |
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14 | #define finite(x) _finite(x) |
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15 | #else //m.in. __BORLANDC__ |
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16 | #include <math.h> |
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17 | #endif |
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18 | |
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19 | |
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20 | |
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21 | //random number generator: |
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22 | #include "random.h" |
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23 | RandomGenerator &rndGetInstance(); |
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24 | |
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25 | inline double rndDouble(double limit_exclusive) { return rndGetInstance().getDouble() * limit_exclusive; } |
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26 | inline unsigned int rndUint(unsigned int limit_exclusive) { return (unsigned int)(rndGetInstance().getDouble() * limit_exclusive); } //returns random from 0..limit_exclusive-1 |
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27 | inline void rndSetSeed(unsigned int seed) { rndGetInstance().setSeed(seed); } |
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28 | inline unsigned int rndRandomizeSeed() { return rndGetInstance().randomize(); } |
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29 | |
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30 | |
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31 | |
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32 | // precision==-1 for full precision, or positive values for the number of digits to print past the decimal point. |
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33 | // Allocated buffer with bufferlen=30 is OK. |
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34 | // Returns the number of chars actually used (not including the ending 0). |
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35 | int doubleToString(double x, int precision, char *buffer, int bufferlen); |
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36 | |
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37 | #include <string> |
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38 | std::string doubleToString(double x, int precision); |
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39 | double round(const double x, const int precision); |
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40 | |
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41 | |
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42 | |
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43 | |
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44 | |
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45 | //floating point specific numbers |
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46 | #include "stdlib.h" |
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47 | |
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48 | #ifdef __BORLANDC__ |
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49 | #include <float.h> |
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50 | #define isnan(x) _isnan(x) //http://stackoverflow.com/questions/570669/checking-if-a-double-or-float-is-nan-in-c |
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51 | #define finite(x) _finite(x) |
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52 | #endif |
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53 | |
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54 | #ifdef LINUX |
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55 | #define _isnan(a) isnan(a) |
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56 | #endif |
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57 | |
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58 | #ifdef IPHONE |
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59 | #define finite(x) (!isinf(x)) |
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60 | #define _isnan(a) isnan(a) |
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61 | #endif |
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62 | |
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63 | |
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64 | #if defined SHP |
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65 | //#define __assert_func(a,b,c,d) 0 //Currently, we are sorry to inform you that assert() is not yet supported. We have considered your request for internal discussion. Na szczêcie jest w³asna (byle by by³a, bo i tak zak³adamy ze assert ktore przeciez dziala tylko w trybie debug nie jest potrzebne na bada) implementacja w "bada-assert.cpp" |
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66 | #define isnan(x) false //isnan() sie nie linkuje |
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67 | #define finite(x) true //j.w. |
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68 | //#include <cstdlib> //RAND_MAX defined incorrectly |
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69 | //#ifdef BADA_SIMULATOR //...but only in simulator libs |
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70 | // #undef RAND_MAX |
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71 | // #define RAND_MAX 32768 //...this is the actual value used by rand() |
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72 | //#endif |
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73 | #endif |
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74 | |
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75 | //handling floating point exceptions |
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76 | void fpExceptInit(); //call once, before ...Enable/Disable |
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77 | void fpExceptEnable(); |
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78 | void fpExceptDisable(); |
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79 | |
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80 | // std::lerp can be used since C++20 (and has some guaranteed properties probably better than this basic formula) but apparently it is not a template |
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81 | template <typename Value, typename Linear> Value universal_lerp(Value a,Value b,Linear t) {return a*(1-t)+b*t;} |
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82 | |
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83 | template <typename T> T linearTransform(T value, T min_in, T max_in, T min_out, T max_out) |
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84 | { |
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85 | return min_out + (value-min_in)*(max_out-min_out)/(max_in-min_in); |
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86 | } |
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87 | |
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88 | //in C++20, related: https://en.cppreference.com/w/cpp/numeric/countl_zero |
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89 | #ifdef _WIN32 //visual studio is missing ffs() |
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90 | static inline unsigned ffs(int x) |
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91 | { |
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92 | if (x == 0) return 0u; |
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93 | unsigned r = 1; |
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94 | while ((x & 1) == 0) |
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95 | x >>= 1, ++r; |
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96 | return r; |
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97 | } |
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98 | #endif |
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99 | |
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100 | |
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101 | #endif |
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