source: trunk/VUT/GtpVisibilityPreprocessor/src/common.h @ 329

Revision 329, 8.8 KB checked in by mattausch, 19 years ago (diff)

worked on ray based subdivision

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