[372] | 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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| 129 |
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| 130 | // tolerance value for polygon area
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| 131 | #define AREA_LIMIT 0.0001f
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| 132 |
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| 133 | #ifndef DEL_PTR
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| 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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| 138 | #endif
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| 139 | // Clears a container (i.e., a vector of pointers) and deletes the pointers
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[574] | 140 | #if 0
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[372] | 141 | #ifndef CLEAR_CONTAINER
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| 142 | #define CLEAR_CONTAINER(co) do { while (!(co).empty()) { \
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| 143 | DEL_PTR((co).back()); \
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| 144 | (co).pop_back();}} \
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| 145 | while (0)
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| 146 | #endif
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| 147 |
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[582] | 148 | #else
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| 149 |
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[574] | 150 | #ifndef CLEAR_CONTAINER
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| 151 | #define CLEAR_CONTAINER(co) do { for (int _i = 0; _i < (int)(co).size(); ++ _i) { \
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| 152 | DEL_PTR((co)[_i]);} \
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| 153 | (co).clear(); } \
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| 154 | while (0)
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| 155 | #endif
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| 156 |
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[582] | 157 | #endif
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| 158 |
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| 159 |
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[372] | 160 | inline
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| 161 | int signum(const Real a, const Real thresh = TRASH)
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| 162 | {
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| 163 | if (a>thresh)
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| 164 | return 1;
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| 165 | else
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| 166 | if (a<-thresh)
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| 167 | return -1;
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| 168 | return 0;
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| 169 | }
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| 170 |
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| 171 | inline double Absd(const double a)
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| 172 | {
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| 173 | return (a >= 0.0) ? a : -a;
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| 174 | }
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| 175 |
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| 176 | inline float Abs(const float a)
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| 177 | {
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| 178 | return (a >= 0.0f) ? a : -a;
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| 179 | }
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| 180 |
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| 181 | // =======================================================
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| 182 | // Comparing things
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| 183 | //struct Limits {
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| 184 | // const Real thresh=TRASH;
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| 185 | // const Real small=0.1;
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| 186 | //};
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| 187 |
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| 188 | template <class T>
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| 189 | bool
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| 190 | ClipValue(T &v, const T m, const T M)
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| 191 | {
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| 192 | if (v<m) {
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| 193 | v = m;
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| 194 | return true;
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| 195 | }
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| 196 | if (v>M) {
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| 197 | v = M;
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| 198 | return true;
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| 199 | }
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| 200 |
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| 201 | return false;
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| 202 | }
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| 203 |
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| 204 |
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| 205 | inline int eq(Real a, Real b, Real t=TRASH)
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| 206 | {
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| 207 | return Abs(a-b)<t;
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| 208 | }
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| 209 |
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| 210 | inline int leq(Real a,Real b,Real t=TRASH)
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| 211 | {
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| 212 | return a - b < t;
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| 213 | }
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| 214 |
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| 215 | inline int geq(Real a,Real b,Real t=TRASH)
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| 216 | {
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| 217 | return t > b - a;
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| 218 | }
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| 219 |
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| 220 | inline int le(Real a,Real b,Real t=TRASH)
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| 221 | {
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| 222 | return !geq(a,b,t);
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| 223 | }
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| 224 |
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| 225 | inline int ge(Real a,Real b,Real t=TRASH)
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| 226 | {
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| 227 | return !leq(a,b,t);
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| 228 | }
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| 229 |
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| 230 | // ========================================================
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| 231 |
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| 232 | // -------------------------------------------------------------------
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| 233 | // Indents to a given stream by the number of spaces specified.
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| 234 | // This routine is located in main.cpp, for lack of a better place.
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| 235 | // -------------------------------------------------------------------
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| 236 | void indent(ostream &app, int ind);
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| 237 |
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| 238 | // ---------------------------------------------------------
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| 239 | // RandomValue
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| 240 | // Returns a random Realing-point value between the two
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| 241 | // values. Range is inclusive; the function should
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| 242 | // occasionally return exactly a or b.
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| 243 | // ---------------------------------------------------------
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| 244 | inline Real
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| 245 | RandomValue(Real a, Real b)
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| 246 | {
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| 247 | Real range = (Real) Abs(a - b);
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| 248 | return ((Real)rand() / RAND_MAX) * range + ((a < b) ? a : b);
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| 249 | }
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| 250 |
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| 251 |
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| 252 |
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[434] | 253 |
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[372] | 254 | inline Real sqr(Real a)
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| 255 | {
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| 256 | return a*a;
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| 257 | }
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| 258 |
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| 259 | template <class T>
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| 260 | void Swap(T &a,T &b)
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| 261 | {
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| 262 | T c;
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| 263 | c = b;
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| 264 | b = a;
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| 265 | a = c;
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| 266 | }
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| 267 |
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| 268 | template <class T>
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| 269 | int eq(T &a, T &b, T &c, T &d) {
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| 270 | return a == b && c==d && b==c;
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| 271 | }
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| 272 |
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| 273 | template <class T>
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| 274 | T Min(T a,T b)
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| 275 | {
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| 276 | return a<b ? a : b;
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| 277 | }
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| 278 |
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| 279 | template <class T>
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| 280 | T Max(T a,T b)
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| 281 | {
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| 282 | return a>b ? a : b;
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| 283 | }
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| 284 |
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| 285 |
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| 286 | Real Random(Real max);
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| 287 | int Random(int max);
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| 288 | void Randomize();
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| 289 | void
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| 290 | Randomize(const unsigned int seed);
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| 291 |
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| 292 |
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| 293 | void GetKey(char *s=NULL);
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| 294 |
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| 295 | inline Real Deg2Rad(const Real a)
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| 296 | {
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| 297 | return a*(PI/180.0f);
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| 298 | }
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| 299 |
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| 300 | inline Real Rad2Deg(const Real a) {
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| 301 | return a*(180.0f/PI);
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| 302 | }
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| 303 |
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| 304 | void InitTiming();
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| 305 | long GetTime();
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| 306 | long GetRealTime();
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| 307 | Real TimeDiff(long t1,long t2);
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| 308 | char *TimeString();
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| 309 |
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| 310 |
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| 311 | // manipulator
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| 312 | inline ostream &DEBUGINFO( ostream &s ) {
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| 313 | return s<<"FILE "<<__FILE__<<",LINE "<<__LINE__<<endl;
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| 314 | }
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| 315 |
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| 316 | #define DINFO __FILE__<<":"<<__LINE__
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| 317 |
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| 318 |
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| 319 | class CGlobals {
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| 320 | public:
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| 321 |
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| 322 | static int Special;
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| 323 |
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| 324 | };
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| 325 |
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| 326 | // -------------------------------------------------------------------
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| 327 | // Limits.
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| 328 | // This class encapsulates all the concessions to Realing-point
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| 329 | // error made by ray tracers.
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| 330 | // -------------------------------------------------------------------
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| 331 |
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| 332 | class Limits {
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| 333 | public:
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| 334 | // This is the number used to reject too-close intersections.
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| 335 | // The default value is 1.0.
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| 336 | static Real Threshold;
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| 337 |
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| 338 | // This is a "small" number. Less than this number is assumed to
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| 339 | // be 0, when such things matter.
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| 340 | // The default value is 0.1.
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| 341 | static Real Small;
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| 342 |
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| 343 | // This is an impractically "large" number, used for intersection
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| 344 | // parameters out to infinity (e.g. the span resulting from an
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| 345 | // FindAllIntersections operation on a plane).
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| 346 | // The default value is 100000.
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| 347 | static Real Infinity;
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| 348 | };
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| 349 |
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| 350 | // ---------------------------------------------------------
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| 351 | // EpsilonEqual(x,y)
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| 352 | // Returns if two values are equal or not (by epsilon)
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| 353 | // ---------------------------------------------------------
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| 354 | inline int
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| 355 | EpsilonEqual(const Real &x, const Real &y)
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| 356 | {
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| 357 | return fabs(x-y) < Limits::Small;
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| 358 | }
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| 359 |
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| 360 | // ---------------------------------------------------------
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| 361 | // EpsilonEqual(x)
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| 362 | // Returns if a value is zero (+/- epsilon)
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| 363 | // ---------------------------------------------------------
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| 364 | inline int
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| 365 | EpsilonEqual(const Real &x)
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| 366 | {
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| 367 | return fabs(x) < Limits::Small;
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| 368 | }
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| 369 |
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| 370 | // ---------------------------------------------------------
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| 371 | // EpsilonEqual(x,y,epsilon)
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| 372 | // Returns if two values are equal or not by a given epsilon
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| 373 | // ---------------------------------------------------------
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| 374 | inline int
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| 375 | EpsilonEqual(const Real &x, const Real &y, const Real &epsilon)
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| 376 | {
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| 377 | return fabs(x-y) < epsilon;
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| 378 | }
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| 379 |
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| 380 | // ---------------------------------------------------------
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| 381 | // InRange
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| 382 | // Returns nonzero if min <= candidate <= max.
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| 383 | // ---------------------------------------------------------
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| 384 | template<class T>
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| 385 | inline int
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| 386 | InRange(T min, T max, T candidate)
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| 387 | {
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| 388 | return (candidate >= min) && (candidate <= max);
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| 389 | }
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| 390 |
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| 391 | // --------------------------------------------------------------
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| 392 | // string function with new operator
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| 393 |
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| 394 | inline char*
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| 395 | StrDup(char *src) {
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| 396 | char *p;
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| 397 | for (p = src; *p++; );
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| 398 | char *dest = new char[p-src];
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| 399 | for ( p = dest;(*p++ = *src++) != 0; );
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| 400 | return dest;
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| 401 | }
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| 402 |
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| 403 |
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| 404 | inline char *
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| 405 | StrToLower(char *src) {
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| 406 | char *p;
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| 407 | for (p = src; *p; p++)
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| 408 | *p = tolower(*p);
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| 409 | return src;
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| 410 | }
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| 411 |
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| 412 | // return l = log2(a) if a is a power of two else -ceillog2(a)
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| 413 | inline int
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| 414 | GetLog2(int a)
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| 415 | {
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| 416 | int i, x;
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| 417 | i = 0;
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| 418 | x = 1;
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| 419 |
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| 420 | while (x < a) {
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| 421 | i++;
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| 422 | x <<= 1;
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| 423 | }
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| 424 |
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| 425 | return (x==a) ? i: -i;
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| 426 | }
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| 427 |
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| 428 |
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| 429 | // return ceil(log2(a)) even if a is not a power of two
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| 430 | // Example:
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| 431 | // GetCeilLog2(15) = 4
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| 432 | // GetCeilLog2(16) = 4
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| 433 | // GetCeilLog2(17) = 5
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| 434 | inline int
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| 435 | GetCeilLog2(int a)
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| 436 | {
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| 437 | int i, x;
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| 438 | if (a < 0)
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| 439 | return -1;
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| 440 |
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| 441 | i = 0;
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| 442 | x = 1;
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| 443 |
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| 444 | while (x < a) {
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| 445 | i++;
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| 446 | x <<= 1;
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| 447 | }
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| 448 |
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| 449 | return i;
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| 450 | }
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| 451 |
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| 452 |
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| 453 | char *
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| 454 | GetAbsPath(char *path);
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| 455 |
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| 456 | char *
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| 457 | strdup(char *a);
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| 458 |
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| 459 | bool
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| 460 | FileExists(char *filename);
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| 461 |
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| 462 | #define DEBUG_LEVEL 5
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| 463 | //#define DEBUG_LEVEL 1000
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| 464 | //#define DEBUG_LEVEL 50000
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| 465 |
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| 466 | // debug stream
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| 467 | extern ofstream Debug;
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| 468 |
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| 469 |
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| 470 | bool
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| 471 | CreateDir(char *dir);
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| 472 |
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| 473 | char *
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| 474 | GetPath(const char *s);
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| 475 |
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| 476 | #endif
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| 477 |
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| 478 |
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| 479 |
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| 480 |
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| 481 |
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| 482 |
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| 483 |
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| 484 |
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| 485 |
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| 486 |
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| 487 |
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