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https://github.com/saitohirga/WSJT-X.git
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56 lines
1.1 KiB
C++
56 lines
1.1 KiB
C++
#include "getfile.h"
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#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
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#include <QRandomGenerator>
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#include <random>
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#endif
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <math.h>
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#ifdef WIN32
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#include <windows.h>
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#else
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <termios.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <err.h>
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#endif
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//#define MAX_RANDOM 0x7fffffff
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/* Generate gaussian random float with mean=0 and std_dev=1 */
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float gran()
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{
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#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
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static std::normal_distribution<float> d;
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return d (*QRandomGenerator::global ());
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#else
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float fac,rsq,v1,v2;
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static float gset;
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static int iset;
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if(iset){
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/* Already got one */
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iset = 0;
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return gset;
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}
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/* Generate two evenly distributed numbers between -1 and +1
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* that are inside the unit circle
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*/
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do {
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v1 = 2.0 * (float)qrand() / RAND_MAX - 1;
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v2 = 2.0 * (float)qrand() / RAND_MAX - 1;
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rsq = v1*v1 + v2*v2;
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} while(rsq >= 1.0 || rsq == 0.0);
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fac = sqrt(-2.0*log(rsq)/rsq);
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gset = v1*fac;
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iset++;
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return v2*fac;
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#endif
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}
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