misc.h

These mobility generator tools are used to generate a rich set of mobility scenarios used to evalua

#ifndef MISC_H_
#define MISC_H_

#define MAX_STRING_LENGTH 20
#define TRACE_FORMAT "\n$ns_ at %lf \"$node_(%d) setdest %lf %lf %lf\""


//return a random double number at interval [0,1]
double new_random1()
{	return (double) (rand()*1.0/RAND_MAX);	}

//return a random double number at the interval [-1,1]
double new_random2()
{	return (double) ((rand()*1.0/RAND_MAX-0.5)*2);	}



//return the min number
double max(double a, double b)
{
	if(a>=b)
		return a;
	else 
		return b;
}

//return the max number
double min(double a, double b)
{
	if(a<=b)
		return a;
	else 
		return b;
}

//calculate the correlation value at time t
double correlation(double speed1, double angle1, double speed2, double angle2)
{
	double x_speed1 = speed1*cos(angle1);
	double y_speed1 = speed1*sin(angle1);

	double x_speed2 = speed2*cos(angle2);
	double y_speed2 = speed2*sin(angle2);

	return (x_speed1*x_speed2 + y_speed1*y_speed2)/(speed1*speed2)*(min(speed1,speed2)/max(speed1,speed2));
}

//calculate the angle correlation
double angle_correlation(double speed1, double angle1, double speed2, double angle2)
{
	double x_speed1 = speed1*cos(angle1);
	double y_speed1 = speed1*sin(angle1);
	double x_speed2 = speed2*cos(angle2);
	double y_speed2 = speed2*sin(angle2);
	return (x_speed1*x_speed2 + y_speed1*y_speed2)/(speed1*speed2);
}

//calculate the speed correlation
double speed_correlation(double speed1, double speed2)
{
	return (min(speed1,speed2)/max(speed1,speed2));
}

#endif