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/*******************************************************************************
* Copyright (c) 2014 protos software gmbh (http://www.protos.de).
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* CONTRIBUTORS:
* Thomas Schuetz (initial contribution)
*
*******************************************************************************/
#include "RandomGenerator.h"
#include "math.h"
void RandomGenerator_init(RandomGenerator* self, float64 seed, float64 min, float64 max){
self->seed = seed;
self->min = min;
self->max = max;
self->range = max-min;
self->current = seed;
}
float64 RandomGenerator_getNext(RandomGenerator* self){
self->seed = 1000. * fabs(log(self->seed)); /* shift comma 3 times to get nice values */
int64 resultInt = self->seed; /* get int number left of comma */
self->seed = self->seed - resultInt; /* cut off everything left of comma */
self->current = self->seed*self->range + self->min; /* stretch to range */
self->seed += 0.1; /** seed must always be bigger than 0 for log in next iteration */
return self->current;
}
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