| 1 |
< |
/* RCSid: $Id$ */ |
| 1 |
> |
/* RCSid $Id$ */ |
| 2 |
|
/* |
| 3 |
|
* random.h - header file for random(3) and urand() function. |
| 4 |
|
*/ |
| 5 |
+ |
#ifndef _RAD_RANDOM_H_ |
| 6 |
+ |
#define _RAD_RANDOM_H_ |
| 7 |
+ |
#ifdef __cplusplus |
| 8 |
+ |
extern "C" { |
| 9 |
+ |
#endif |
| 10 |
|
|
| 6 |
– |
/* ==================================================================== |
| 7 |
– |
* The Radiance Software License, Version 1.0 |
| 8 |
– |
* |
| 9 |
– |
* Copyright (c) 1990 - 2002 The Regents of the University of California, |
| 10 |
– |
* through Lawrence Berkeley National Laboratory. All rights reserved. |
| 11 |
– |
* |
| 12 |
– |
* Redistribution and use in source and binary forms, with or without |
| 13 |
– |
* modification, are permitted provided that the following conditions |
| 14 |
– |
* are met: |
| 15 |
– |
* |
| 16 |
– |
* 1. Redistributions of source code must retain the above copyright |
| 17 |
– |
* notice, this list of conditions and the following disclaimer. |
| 18 |
– |
* |
| 19 |
– |
* 2. Redistributions in binary form must reproduce the above copyright |
| 20 |
– |
* notice, this list of conditions and the following disclaimer in |
| 21 |
– |
* the documentation and/or other materials provided with the |
| 22 |
– |
* distribution. |
| 23 |
– |
* |
| 24 |
– |
* 3. The end-user documentation included with the redistribution, |
| 25 |
– |
* if any, must include the following acknowledgment: |
| 26 |
– |
* "This product includes Radiance software |
| 27 |
– |
* (http://radsite.lbl.gov/) |
| 28 |
– |
* developed by the Lawrence Berkeley National Laboratory |
| 29 |
– |
* (http://www.lbl.gov/)." |
| 30 |
– |
* Alternately, this acknowledgment may appear in the software itself, |
| 31 |
– |
* if and wherever such third-party acknowledgments normally appear. |
| 32 |
– |
* |
| 33 |
– |
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
| 34 |
– |
* and "The Regents of the University of California" must |
| 35 |
– |
* not be used to endorse or promote products derived from this |
| 36 |
– |
* software without prior written permission. For written |
| 37 |
– |
* permission, please contact [email protected]. |
| 38 |
– |
* |
| 39 |
– |
* 5. Products derived from this software may not be called "Radiance", |
| 40 |
– |
* nor may "Radiance" appear in their name, without prior written |
| 41 |
– |
* permission of Lawrence Berkeley National Laboratory. |
| 42 |
– |
* |
| 43 |
– |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| 44 |
– |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 45 |
– |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 46 |
– |
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
| 47 |
– |
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 48 |
– |
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 49 |
– |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 50 |
– |
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 51 |
– |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 52 |
– |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 53 |
– |
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 54 |
– |
* SUCH DAMAGE. |
| 55 |
– |
* ==================================================================== |
| 56 |
– |
* |
| 57 |
– |
* This software consists of voluntary contributions made by many |
| 58 |
– |
* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
| 59 |
– |
* information on Lawrence Berkeley National Laboratory, please see |
| 60 |
– |
* <http://www.lbl.gov/>. |
| 61 |
– |
*/ |
| 62 |
– |
|
| 11 |
|
#ifdef NORANDOM |
| 12 |
|
|
| 13 |
|
#undef random |
| 18 |
|
#define urand(i) 0.5 |
| 19 |
|
#define initurand(n) (n) |
| 20 |
|
|
| 21 |
< |
#else |
| 21 |
> |
#else /* ! NORANDOM */ |
| 22 |
|
|
| 23 |
< |
#ifdef MSDOS |
| 23 |
> |
#ifdef _WIN32 |
| 24 |
|
|
| 25 |
+ |
#if (RAND_MAX <= 65536) |
| 26 |
|
#define random() ((long)rand()<<16^(long)rand()<<6^(long)rand()>>4) |
| 27 |
+ |
#else |
| 28 |
+ |
#define random() rand() |
| 29 |
+ |
#endif |
| 30 |
|
#define srandom(s) srand((unsigned)(s)) |
| 31 |
|
|
| 32 |
< |
#define frandom() (rand()*(1./32768.)) |
| 32 |
> |
#define frandom() (rand()*(1./RAND_MAX)) |
| 33 |
|
|
| 34 |
|
#else |
| 35 |
|
#ifdef BSD |
| 55 |
|
#define urand(i) frandom() |
| 56 |
|
#define initurand(n) (n) |
| 57 |
|
|
| 58 |
< |
#else |
| 58 |
> |
#else /* ! MC */ |
| 59 |
|
|
| 60 |
|
extern unsigned short *urperm; |
| 61 |
|
extern int urmask; |
| 62 |
|
|
| 63 |
|
#define urand(i) ((urperm[(i)&urmask]+frandom())/(urmask+1)) |
| 64 |
|
|
| 65 |
< |
#endif |
| 65 |
> |
extern int initurand(int size); |
| 66 |
|
|
| 67 |
< |
#endif |
| 67 |
> |
#endif /* ! MC */ |
| 68 |
|
|
| 69 |
< |
#ifdef NOPROTO |
| 69 |
> |
#endif /* ! NORANDOM */ |
| 70 |
|
|
| 119 |
– |
extern int initurand(); |
| 120 |
– |
extern int ilhash(); |
| 121 |
– |
extern int urind(); |
| 122 |
– |
extern void multisamp(); |
| 123 |
– |
|
| 124 |
– |
#else |
| 71 |
|
/* defined in urand.c */ |
| 126 |
– |
extern int initurand(int size); |
| 72 |
|
extern int ilhash(int *d, int n); |
| 73 |
|
/* defined in urind.c */ |
| 74 |
|
extern int urind(int s, int i); |
| 75 |
|
/* defined in multisamp.c */ |
| 76 |
|
extern void multisamp(double t[], int n, double r); |
| 77 |
|
|
| 78 |
+ |
|
| 79 |
+ |
#ifdef __cplusplus |
| 80 |
+ |
} |
| 81 |
|
#endif |
| 82 |
+ |
#endif /* _RAD_RANDOM_H_ */ |
| 83 |
+ |
|
