jfreerails.world.train
Class ConstAcc

java.lang.Object
  jfreerails.world.train.ConstAcc

All Implemented Interfaces:

java.io.Serializable, FreerailsSerializable, SpeedAgainstTime

public class ConstAcc
extends java.lang.Object
implements FreerailsSerializable, SpeedAgainstTime

See Also:

Serialized Form

Field Summary

private double	a
private double	finalS
private double	finalT
private static long	serialVersionUID
static ConstAcc	STOPPED
private double	u

Constructor Summary

private

ConstAcc(double a, double t, double u, double s)

Method Summary

double	calcA(double t)
double	calcS(double t) Returns the distance travelled at time t.
double	calcT(double s) Returns the time taken to travel distance s.
private static double	calcT(double u, double a, double s)
double	calcV(double t)
boolean	equals(java.lang.Object o)
double	getS()
double	getT()
int	hashCode()
java.lang.String	toString()
static ConstAcc	uas(double u, double a, double s)
static ConstAcc	uat(double u, double a, double t)
private void	validateT(double t)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

STOPPED

public static final ConstAcc STOPPED

u

private final double u

a

private final double a

finalS

private final double finalS

finalT

private final double finalT

Constructor Detail

ConstAcc

private ConstAcc(double a,
                 double t,
                 double u,
                 double s)

Method Detail

uas

public static ConstAcc uas(double u,
                           double a,
                           double s)

calcT

private static double calcT(double u,
                            double a,
                            double s)

uat

public static ConstAcc uat(double u,
                           double a,
                           double t)

calcS

public double calcS(double t)

Description copied from interface: SpeedAgainstTime

Returns the distance travelled at time t. The returned value, s, satisfies the following conditions:

1. s >= 0
2. s <= getS()
3. s = 0 if t = 0
4. s = getS() if t = getT()

Specified by:

calcS in interface SpeedAgainstTime

Returns:

s

calcT

public double calcT(double s)

Description copied from interface: SpeedAgainstTime

Returns the time taken to travel distance s. The returned value, t, satisfies the following conditions:

1. t >= 0
2. t <= getT()
3. t = 0 if s = 0
4. t = getT() if s = getS()

Specified by:

calcT in interface SpeedAgainstTime

Returns:

t

calcV

public double calcV(double t)

Specified by:

calcV in interface SpeedAgainstTime

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

calcA

public double calcA(double t)

Specified by:

calcA in interface SpeedAgainstTime

getT

public double getT()

Specified by:

getT in interface SpeedAgainstTime

Returns:

The time taken to travel the distance given by getS().

getS

public double getS()

Specified by:

getS in interface SpeedAgainstTime

Returns:

The distance traveled during at time given by getT().

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

validateT

private void validateT(double t)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object