Class Cannonball

java.lang.Object

Cannonball

public class Cannonball
extends java.lang.Object

Cannonball class represents balls fired with a given initial elevation angle and speed, that subsequently follow a parabolic trajectory with constant vertical acceleration

Author:

ALVAREZ

Field Summary

Fields

Modifier and Type	Field and Description
static double	FRAME_RATE Number of frames displayed per second
static double	GRAVITY Acceleration of gravity
static double	RADIUS Radius of ball

Constructor Summary

Constructors

Constructor and Description
Cannonball() Default constructor creates a new Cannonball with initial angle 45 degrees, initial speed 1
Cannonball(double angle, double speed) Creates a new Cannonball with specified initial angle (degrees) and initial speed (ft/s)

Method Summary

Methods

Modifier and Type	Method and Description
void	fire() Fires this Cannonball
void	setAngle(double angle) Sets this Cannonball's firing angle to a specified amount
void	setSpeed(double speed) Sets this Cannonball's firing speed to a specified amount
double	vx() Returns the initial speed of this Cannonball
double	vy() Returns the initial angle of this Cannonball

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

GRAVITY

public static double GRAVITY

Acceleration of gravity

RADIUS

public static double RADIUS

Radius of ball

FRAME_RATE

public static double FRAME_RATE

Number of frames displayed per second

Constructor Detail

Cannonball

public Cannonball()

Default constructor creates a new Cannonball with initial angle 45 degrees, initial speed 1

Cannonball

public Cannonball(double angle,
          double speed)

Creates a new Cannonball with specified initial angle (degrees) and initial speed (ft/s)

Method Detail

fire

public void fire()

Fires this Cannonball

vx

public double vx()

Returns the initial speed of this Cannonball

Returns:

speed in ft/s

vy

public double vy()

Returns the initial angle of this Cannonball

Returns:

angle in degrees

setAngle

public void setAngle(double angle)

Sets this Cannonball's firing angle to a specified amount

Parameters:

angle - the desired firing angle in degrees

setSpeed

public void setSpeed(double speed)

Sets this Cannonball's firing speed to a specified amount

Parameters:

speed - the desired firing speed in ft/s