source: cpp/common/nonstd_math.h @ 899

Last change on this file since 899 was 899, checked in by Maciej Komosinski, 12 days ago

Code formatting

  • Property svn:eol-style set to native
File size: 2.7 KB
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1// This file is a part of Framsticks SDK.  http://www.framsticks.com/
2// Copyright (C) 1999-2019  Maciej Komosinski and Szymon Ulatowski.
3// See LICENSE.txt for details.
4
5#ifndef _NONSTD_MATH_H_
6#define _NONSTD_MATH_H_
7
8
9#ifdef _MSC_VER
10 #define _USE_MATH_DEFINES //after this is defined, the next #include <math.h> or <cmath> will define M_PI etc.
11 #include <math.h> //w vc2008 dzia³a³o tu <cmath>, ale w vc2010 juz nie bo "coœ" (jakiœ inny .h stl'a?) includuje wczeœniej <cmath> bez _USE_MATH_DEFINES, a <cmath> includuje <math.h> (ale tylko raz bo ma "include guards" jak kazdy .h)
12 #include <float.h>
13 //#define isnan(x) _isnan(x) //since 2014 we use std::isnan()
14 #define finite(x) _finite(x)
15#else //m.in. __BORLANDC__
16 #include <math.h>
17#endif
18
19
20
21//random number generator:
22#include "random.h"
23RandomGenerator &rndGetInstance();
24
25inline double rndDouble(double limit_exclusive) { return rndGetInstance().getDouble() * limit_exclusive; }
26inline unsigned int rndUint(unsigned int limit_exclusive) { return (unsigned int)(rndGetInstance().getDouble() * limit_exclusive); } //returns random from 0..limit_exclusive-1
27inline void rndSetSeed(unsigned int seed) { rndGetInstance().setSeed(seed); }
28inline unsigned int rndRandomizeSeed() { return rndGetInstance().randomize(); }
29
30//floating point specific numbers
31#include "stdlib.h"
32
33#ifdef __BORLANDC__
34        #include <float.h>
35        #define isnan(x) _isnan(x) //http://stackoverflow.com/questions/570669/checking-if-a-double-or-float-is-nan-in-c
36        #define finite(x) _finite(x)
37#endif
38
39#ifdef LINUX
40  #define _isnan(a) isnan(a)
41#endif
42
43#ifdef IPHONE
44        #define finite(x) (!isinf(x))
45  #define _isnan(a) isnan(a)
46#endif
47
48
49#if defined SHP
50 //#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 szczêœcie 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"
51 #define isnan(x) false //isnan() sie nie linkuje
52 #define finite(x) true //j.w.
53 //#include <cstdlib> //RAND_MAX defined incorrectly
54 //#ifdef BADA_SIMULATOR //...but only in simulator libs
55 // #undef RAND_MAX
56 // #define RAND_MAX 32768 //...this is the actual value used by rand()
57 //#endif
58#endif
59
60
61//handling floating point exceptions
62void fpExceptInit(); //call once, before ...Enable/Disable
63void fpExceptEnable();
64void fpExceptDisable();
65
66// 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
67template <typename Value, typename Linear> Value universal_lerp(Value a,Value b,Linear t) {return a*(1-t)+b*t;}
68
69#endif
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