utils.h File Reference

This file contains utility functions used by oscillations simulation to help in calculations. More...

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Functions
int	_valid_osc (double x, double y, double length, double mass, double gravity, double k, double time_limit, double step_size, double damping_coefficent, int number_of_files, double Fo)
	Validate on input entered to oscillation.
int	_min_int (int x, int y)
	get the minimum between x,y
int	_round (double x)
	round x value to the nearest int
double	_dx (double dx)
	calculate dx for elastic pendulum system
double	_dy (double dy)
	calculate dy for elastic pendulum system
double	_f1 (double x, double y, double dx, double tx, double ty, double k, double m, double b, double r)
	calculate first function to solve ode in elastic pendulum
double	_f2 (double x, double y, double dy, double tx, double ty, double k, double m, double b, double r, double g)
	calculate second function to solve ode in elastic pendulum
void	printmemsizestream (char *str, unsigned long ramsize)
int	printmemstream ()
	this function prints memory details for the computer
int	cpu_inf_stream ()
	this function prints the cpu info for the computer
int	_mkdir (char *_dir_name)

Detailed Description

This file contains utility functions used by oscillations simulation to help in calculations.

Function Documentation

_dx()

double _dx

(

double

dx

)

calculate dx for elastic pendulum system

Parameters

dx

Returns

_dy()

double _dy

(

double

dy

)

calculate dy for elastic pendulum system

Parameters

dy

Returns

_f1()

double _f1	(	double	x,
		double	y,
		double	dx,
		double	tx,
		double	ty,
		double	k,
		double	m,
		double	b,
		double	r
	)

calculate first function to solve ode in elastic pendulum

Parameters

x
y
dx
tx
ty
k
m
b
r

Returns

_f2()

double _f2	(	double	x,
		double	y,
		double	dy,
		double	tx,
		double	ty,
		double	k,
		double	m,
		double	b,
		double	r,
		double	g
	)

calculate second function to solve ode in elastic pendulum

Parameters

x
y
dy
tx
ty
k
m
b
r
g

Returns

_min_int()

int _min_int	(	int	x,
		int	y
	)

get the minimum between x,y

Parameters

x
y

Returns

min(x,y)

_round()

int _round

(

double

x

)

round x value to the nearest int

Parameters

x

Returns

rounded x

_valid_osc()

int _valid_osc	(	double	x,
		double	y,
		double	length,
		double	mass,
		double	gravity,
		double	k,
		double	time_limit,
		double	step_size,
		double	damping_coefficent,
		int	number_of_files,
		double	Fo
	)

Validate on input entered to oscillation.

Parameters

x	distance x
y	distance y
length	max length
mass	mass of bob
gravity
k	stiffeness of spring
time_limit	how much time needed to simulate
step_size	how much time change per iteration
damping_coefficent	damping factor affecting on the system
number_of_files
Fo

Returns

1 if all are valid, 0 if [mass < 0 || k < 0 || time_limit <= 0 || step_size < 0 || length <= 0 || gravity <= 0 || damping_coefficent < 0], and -1 if max_length > length

cpu_inf_stream()

int cpu_inf_stream

(

)

this function prints the cpu info for the computer

Returns

int

printmemstream()

int printmemstream

(

)

this function prints memory details for the computer

Returns

int