[162] | 1 | // ================================================================ |
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| 2 | // $Id: common.h,v 1.1 2004/02/16 14:46:00 bittner Exp $ |
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| 3 | // **************************************************************** |
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| 4 | // |
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| 5 | /** \file common.h |
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| 6 | Common defines for the ERS system. |
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| 7 | |
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| 8 | This file contains various macros, templates and constants for the ERS system. |
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| 9 | |
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| 10 | @author Jiri Bittner |
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| 11 | */ |
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| 12 | |
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| 13 | #ifndef __COMMON_H |
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| 14 | #define __COMMON_H |
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| 15 | |
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| 16 | |
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| 17 | #include <math.h> |
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| 18 | #include <stdlib.h> |
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| 19 | #include <iostream> |
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| 20 | #include <fstream> |
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| 21 | using namespace std; |
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| 22 | |
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| 23 | #include <limits.h> |
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| 24 | |
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| 25 | |
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| 26 | // This constant should be used for the length of the array char for filenames |
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| 27 | // etc., for example: char filename[MaxStringLength] |
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| 28 | const int MaxStringLength = 256; |
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| 29 | |
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| 30 | #if defined(_MSC_VER) |
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| 31 | #pragma warning(disable:4018) |
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| 32 | #pragma warning(disable:4800) |
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| 33 | //#pragma warning(disable:4244) |
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| 34 | |
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| 35 | typedef unsigned int uint; |
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| 36 | typedef unsigned short ushort; |
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| 37 | typedef unsigned char uchar; |
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| 38 | typedef unsigned long ulong; |
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| 39 | #endif |
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| 40 | |
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| 41 | #if defined(__GNUC__) || defined(_MSC_VER) |
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| 42 | #define DIRCAT '.' |
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| 43 | #endif |
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| 44 | |
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| 45 | #if !defined(__WATCOMC__) && !defined(__CYGWIN32__) && !defined(_MSC_VER) |
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| 46 | #include <values.h> |
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| 47 | #else // __WATCOMC__ |
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| 48 | #define M_PI 3.14159265358979323846 |
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| 49 | #define MAXFLOAT 3.40282347e+38F |
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| 50 | #endif // __WATCOMC__ |
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| 51 | |
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| 52 | // some compilers do not define the bool yet, but it was declared by ANSI |
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| 53 | #if !defined(__WATCOMC__) && !defined(_MSC_VER) |
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| 54 | #if defined (__GNUC__) || (_BOOL) |
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| 55 | //#error "HAS BOOL defined" |
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| 56 | #define HAS_BOOL |
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| 57 | #endif |
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| 58 | #else // __WATCOMC__ |
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| 59 | #if (__WATCOMC__ > 1060) |
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| 60 | //#error "Watcom HAS BOOL defined" |
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| 61 | #define HAS_BOOL |
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| 62 | #endif |
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| 63 | #endif // __WATCOMC__ |
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| 64 | |
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| 65 | |
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| 66 | #if defined(__WATCOMC__) || defined(_MSC_VER) |
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| 67 | #define strcasecmp stricmp |
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| 68 | #define strncasecmp strnicmp |
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| 69 | #endif // __WATCOMC__ |
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| 70 | |
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| 71 | #ifdef sgi |
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| 72 | #define OUT_BIN_MODE ios::out |
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| 73 | #define IN_BIN_MODE ios::in |
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| 74 | #else // sgi |
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| 75 | #if defined(__WATCOMC__) || defined(_MSC_VER) |
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| 76 | #define OUT_BIN_MODE ios::out | ios::binary |
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| 77 | #define IN_BIN_MODE ios::in | ios::binary |
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| 78 | #else |
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| 79 | #define OUT_BIN_MODE ios::out | ios::bin |
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| 80 | #define IN_BIN_MODE ios::in | ios::bin |
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| 81 | #endif // __WATCOMC_ |
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| 82 | #endif // sgi |
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| 83 | |
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| 84 | |
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| 85 | // #ifndef HAS_BOOL |
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| 86 | // //enum bool { |
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| 87 | // // false = 0, |
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| 88 | // // true |
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| 89 | // //}; |
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| 90 | // #define bool int |
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| 91 | // #define false 0 |
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| 92 | // #define true 1 |
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| 93 | // #endif // HAS_BOOL |
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| 94 | |
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| 95 | typedef unsigned long dword; |
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| 96 | |
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| 97 | #ifndef NULL |
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| 98 | #define NULL (void *)0 |
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| 99 | #endif // NULL |
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| 100 | |
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| 101 | //ostream& operator<<(ostream &s,const BaseC &c); |
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| 102 | |
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| 103 | typedef float Real; |
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| 104 | typedef unsigned char byte; |
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| 105 | |
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| 106 | //#ifndef FALSE |
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| 107 | //#define FALSE 0 |
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| 108 | //#define TRUE !0 |
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| 109 | //#endif |
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| 110 | |
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| 111 | #ifndef __GNUG__ |
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| 112 | // typedef int bool; |
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| 113 | #endif |
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| 114 | |
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| 115 | #ifndef getch |
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| 116 | #define getch() getchar() |
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| 117 | #endif |
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| 118 | |
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| 119 | |
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| 120 | #define TRASH 1.0e-5 |
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| 121 | |
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| 122 | #ifndef PI |
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| 123 | #define PI 3.14159265358979323846f |
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| 124 | #endif |
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| 125 | |
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| 126 | #define MIN_FLOAT -1e30f |
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| 127 | #define MAX_FLOAT 1e30f |
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| 128 | |
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[329] | 129 | |
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| 130 | // tolerance value for polygon area |
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[312] | 131 | #define AREA_LIMIT 0.0001f |
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| 132 | |
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[235] | 133 | #ifndef DEL_PTR |
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[262] | 134 | #define DEL_PTR(ptr) do {if (ptr) { \ |
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| 135 | delete (ptr); \ |
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| 136 | (ptr) = 0;}} \ |
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| 137 | while (0) |
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[235] | 138 | #endif |
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[262] | 139 | // Clears a container (i.e., a vector of pointers) and deletes the pointers |
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[261] | 140 | #ifndef CLEAR_CONTAINER |
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[262] | 141 | #define CLEAR_CONTAINER(co) do { while (!(co).empty()) { \ |
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| 142 | DEL_PTR((co).back()); \ |
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| 143 | (co).pop_back();}} \ |
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| 144 | while (0) |
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[261] | 145 | #endif |
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| 146 | |
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[162] | 147 | inline |
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| 148 | int signum(const Real a, const Real thresh = TRASH) |
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| 149 | { |
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| 150 | if (a>thresh) |
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| 151 | return 1; |
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| 152 | else |
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| 153 | if (a<-thresh) |
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| 154 | return -1; |
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| 155 | return 0; |
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| 156 | } |
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| 157 | |
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| 158 | inline double Absd(const double a) |
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| 159 | { |
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| 160 | return (a >= 0.0) ? a : -a; |
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| 161 | } |
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| 162 | |
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| 163 | inline float Abs(const float a) |
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| 164 | { |
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| 165 | return (a >= 0.0f) ? a : -a; |
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| 166 | } |
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| 167 | |
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| 168 | // ======================================================= |
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| 169 | // Comparing things |
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| 170 | //struct Limits { |
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| 171 | // const Real thresh=TRASH; |
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| 172 | // const Real small=0.1; |
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| 173 | //}; |
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| 174 | |
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| 175 | template <class T> |
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| 176 | bool |
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| 177 | ClipValue(T &v, const T m, const T M) |
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| 178 | { |
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| 179 | if (v<m) { |
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| 180 | v = m; |
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| 181 | return true; |
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| 182 | } |
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| 183 | if (v>M) { |
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| 184 | v = M; |
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| 185 | return true; |
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| 186 | } |
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| 187 | |
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| 188 | return false; |
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| 189 | } |
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| 190 | |
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| 191 | |
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| 192 | inline int eq(Real a, Real b, Real t=TRASH) |
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| 193 | { |
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| 194 | return Abs(a-b)<t; |
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| 195 | } |
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| 196 | |
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| 197 | inline int leq(Real a,Real b,Real t=TRASH) |
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| 198 | { |
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| 199 | return a - b < t; |
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| 200 | } |
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| 201 | |
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| 202 | inline int geq(Real a,Real b,Real t=TRASH) |
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| 203 | { |
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| 204 | return t > b - a; |
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| 205 | } |
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| 206 | |
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| 207 | inline int le(Real a,Real b,Real t=TRASH) |
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| 208 | { |
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| 209 | return !geq(a,b,t); |
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| 210 | } |
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| 211 | |
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| 212 | inline int ge(Real a,Real b,Real t=TRASH) |
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| 213 | { |
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| 214 | return !leq(a,b,t); |
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| 215 | } |
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| 216 | |
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| 217 | // ======================================================== |
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| 218 | |
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| 219 | // ------------------------------------------------------------------- |
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| 220 | // Indents to a given stream by the number of spaces specified. |
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| 221 | // This routine is located in main.cpp, for lack of a better place. |
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| 222 | // ------------------------------------------------------------------- |
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| 223 | void indent(ostream &app, int ind); |
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| 224 | |
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| 225 | // --------------------------------------------------------- |
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| 226 | // RandomValue |
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| 227 | // Returns a random Realing-point value between the two |
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| 228 | // values. Range is inclusive; the function should |
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| 229 | // occasionally return exactly a or b. |
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| 230 | // --------------------------------------------------------- |
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| 231 | inline Real |
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| 232 | RandomValue(Real a, Real b) |
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| 233 | { |
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| 234 | Real range = (Real) Abs(a - b); |
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| 235 | return ((Real)rand() / RAND_MAX) * range + ((a < b) ? a : b); |
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| 236 | } |
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| 237 | |
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| 238 | |
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| 239 | |
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| 240 | inline Real sqr(Real a) |
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| 241 | { |
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| 242 | return a*a; |
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| 243 | } |
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| 244 | |
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| 245 | template <class T> |
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| 246 | void Swap(T &a,T &b) |
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| 247 | { |
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| 248 | T c; |
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| 249 | c = b; |
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| 250 | b = a; |
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| 251 | a = c; |
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| 252 | } |
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| 253 | |
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| 254 | template <class T> |
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| 255 | int eq(T &a, T &b, T &c, T &d) { |
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| 256 | return a == b && c==d && b==c; |
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| 257 | } |
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| 258 | |
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| 259 | template <class T> |
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| 260 | T Min(T a,T b) |
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| 261 | { |
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| 262 | return a<b ? a : b; |
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| 263 | } |
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| 264 | |
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| 265 | template <class T> |
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| 266 | T Max(T a,T b) |
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| 267 | { |
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| 268 | return a>b ? a : b; |
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| 269 | } |
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| 270 | |
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| 271 | |
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| 272 | Real Random(Real max); |
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| 273 | int Random(int max); |
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| 274 | void Randomize(); |
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| 275 | void |
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| 276 | Randomize(const unsigned int seed); |
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| 277 | |
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| 278 | |
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| 279 | void GetKey(char *s=NULL); |
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| 280 | |
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| 281 | inline Real Deg2Rad(const Real a) |
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| 282 | { |
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| 283 | return a*(PI/180.0f); |
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| 284 | } |
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| 285 | |
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| 286 | inline Real Rad2Deg(const Real a) { |
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| 287 | return a*(180.0f/PI); |
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| 288 | } |
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| 289 | |
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| 290 | void InitTiming(); |
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| 291 | long GetTime(); |
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| 292 | long GetRealTime(); |
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| 293 | Real TimeDiff(long t1,long t2); |
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| 294 | char *TimeString(); |
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| 295 | |
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| 296 | |
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| 297 | // manipulator |
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| 298 | inline ostream &DEBUGINFO( ostream &s ) { |
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| 299 | return s<<"FILE "<<__FILE__<<",LINE "<<__LINE__<<endl; |
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| 300 | } |
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| 301 | |
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| 302 | #define DINFO __FILE__<<":"<<__LINE__ |
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| 303 | |
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| 304 | |
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| 305 | class CGlobals { |
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| 306 | public: |
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| 307 | |
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| 308 | static int Special; |
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| 309 | |
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| 310 | }; |
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| 311 | |
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| 312 | // ------------------------------------------------------------------- |
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| 313 | // Limits. |
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| 314 | // This class encapsulates all the concessions to Realing-point |
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| 315 | // error made by ray tracers. |
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| 316 | // ------------------------------------------------------------------- |
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| 317 | |
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| 318 | class Limits { |
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| 319 | public: |
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| 320 | // This is the number used to reject too-close intersections. |
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| 321 | // The default value is 1.0. |
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| 322 | static Real Threshold; |
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| 323 | |
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| 324 | // This is a "small" number. Less than this number is assumed to |
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| 325 | // be 0, when such things matter. |
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| 326 | // The default value is 0.1. |
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| 327 | static Real Small; |
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| 328 | |
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| 329 | // This is an impractically "large" number, used for intersection |
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| 330 | // parameters out to infinity (e.g. the span resulting from an |
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| 331 | // FindAllIntersections operation on a plane). |
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| 332 | // The default value is 100000. |
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| 333 | static Real Infinity; |
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| 334 | }; |
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| 335 | |
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| 336 | // --------------------------------------------------------- |
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| 337 | // EpsilonEqual(x,y) |
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| 338 | // Returns if two values are equal or not (by epsilon) |
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| 339 | // --------------------------------------------------------- |
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| 340 | inline int |
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| 341 | EpsilonEqual(const Real &x, const Real &y) |
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| 342 | { |
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| 343 | return fabs(x-y) < Limits::Small; |
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| 344 | } |
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| 345 | |
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| 346 | // --------------------------------------------------------- |
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| 347 | // EpsilonEqual(x) |
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| 348 | // Returns if a value is zero (+/- epsilon) |
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| 349 | // --------------------------------------------------------- |
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| 350 | inline int |
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| 351 | EpsilonEqual(const Real &x) |
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| 352 | { |
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| 353 | return fabs(x) < Limits::Small; |
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| 354 | } |
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| 355 | |
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| 356 | // --------------------------------------------------------- |
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| 357 | // EpsilonEqual(x,y,epsilon) |
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| 358 | // Returns if two values are equal or not by a given epsilon |
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| 359 | // --------------------------------------------------------- |
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| 360 | inline int |
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| 361 | EpsilonEqual(const Real &x, const Real &y, const Real &epsilon) |
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| 362 | { |
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| 363 | return fabs(x-y) < epsilon; |
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| 364 | } |
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| 365 | |
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| 366 | // --------------------------------------------------------- |
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| 367 | // InRange |
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| 368 | // Returns nonzero if min <= candidate <= max. |
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| 369 | // --------------------------------------------------------- |
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| 370 | template<class T> |
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| 371 | inline int |
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| 372 | InRange(T min, T max, T candidate) |
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| 373 | { |
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| 374 | return (candidate >= min) && (candidate <= max); |
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| 375 | } |
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| 376 | |
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| 377 | // -------------------------------------------------------------- |
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| 378 | // string function with new operator |
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| 379 | |
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| 380 | inline char* |
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| 381 | StrDup(char *src) { |
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| 382 | char *p; |
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| 383 | for (p = src; *p++; ); |
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| 384 | char *dest = new char[p-src]; |
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| 385 | for ( p = dest;(*p++ = *src++) != 0; ); |
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| 386 | return dest; |
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| 387 | } |
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| 388 | |
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| 389 | |
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| 390 | inline char * |
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| 391 | StrToLower(char *src) { |
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| 392 | char *p; |
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| 393 | for (p = src; *p; p++) |
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| 394 | *p = tolower(*p); |
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| 395 | return src; |
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| 396 | } |
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| 397 | |
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| 398 | // return l = log2(a) if a is a power of two else -ceillog2(a) |
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| 399 | inline int |
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| 400 | GetLog2(int a) |
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| 401 | { |
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| 402 | int i, x; |
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| 403 | i = 0; |
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| 404 | x = 1; |
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| 405 | |
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| 406 | while (x < a) { |
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| 407 | i++; |
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| 408 | x <<= 1; |
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| 409 | } |
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| 410 | |
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| 411 | return (x==a) ? i: -i; |
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| 412 | } |
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| 413 | |
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| 414 | |
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| 415 | // return ceil(log2(a)) even if a is not a power of two |
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| 416 | // Example: |
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| 417 | // GetCeilLog2(15) = 4 |
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| 418 | // GetCeilLog2(16) = 4 |
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| 419 | // GetCeilLog2(17) = 5 |
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| 420 | inline int |
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| 421 | GetCeilLog2(int a) |
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| 422 | { |
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| 423 | int i, x; |
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| 424 | if (a < 0) |
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| 425 | return -1; |
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| 426 | |
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| 427 | i = 0; |
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| 428 | x = 1; |
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| 429 | |
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| 430 | while (x < a) { |
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| 431 | i++; |
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| 432 | x <<= 1; |
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| 433 | } |
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| 434 | |
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| 435 | return i; |
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| 436 | } |
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| 437 | |
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| 438 | |
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| 439 | char * |
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| 440 | GetAbsPath(char *path); |
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| 441 | |
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| 442 | char * |
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| 443 | strdup(char *a); |
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| 444 | |
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| 445 | bool |
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| 446 | FileExists(char *filename); |
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| 447 | |
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| 448 | #define DEBUG_LEVEL 5 |
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| 449 | //#define DEBUG_LEVEL 1000 |
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| 450 | //#define DEBUG_LEVEL 50000 |
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| 451 | |
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| 452 | // debug stream |
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| 453 | extern ofstream Debug; |
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| 454 | |
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| 455 | |
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| 456 | bool |
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| 457 | CreateDir(char *dir); |
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| 458 | |
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| 459 | char * |
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| 460 | GetPath(const char *s); |
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| 461 | |
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| 462 | #endif |
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| 463 | |
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| 464 | |
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| 465 | |
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| 466 | |
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| 467 | |
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| 468 | |
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| 469 | |
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| 470 | |
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| 471 | |
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| 472 | |
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| 473 | |
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