physics
Class FrictionMotion

java.lang.Object
  physics.IMotion
      physics.FrictionMotion

public class FrictionMotion
extends IMotion

FrictionMotion.java Created: Fri Nov 12 14:55:12 2004

Version:

An Imotion that mimics friction

Author:

Constructor Summary

FrictionMotion(CollisionObject colOb)
Creates a new FrictionMotion instance.

Method Summary

void	bounce(CollisionObject col) A bounce for this motion
void	calculateMomentum(CollisionObject col) Calculates the momentum of this object using the line formulas and the angle of collision
void	changeMomentum(double percentoff) Changes the momentum of the object with this motion by subtracting the momentum it must give to the object with which it collided
boolean	getCollided() Return whether it has collided
int	getDX() Returns dx of the velocity
int	getDY() Returns dy of the velocity
int	getSpeed() Returns the speed of the motion
double	getVelocity() Return the velocity of the object based on dy and dx
void	setCoefficient(double c) Sets the coefficient of friction
void	setDX(double d) Set the dx direction
void	setDX(int dx) Sets the DX direction
void	setDY(double d) Set the dy direction
void	setDY(int dy) Sets the DY direction
void	setLocation(double x, double y) Sets the location of the object based on a double value for x and y
void	setVelocity(int dx, int dy, int speed) Sets the velocity of the motion based on a dx, dy, and speed
void	start() Starts the MotionTimer for this motion
void	stillCollide(CollisionObject col) Checks to see if the object that has this motion, and the param are still colliding, and if so moves them apart
void	stop() Stops the MotionTimer for this object
void	switchMomentum(double m, CollisionObject col) Switchs the momentum of the the object with this motion and col
void	timerReact() Moves the object at intervals decided by the timer and checks for collisions
static double	truncate(double db) Returns a truncated double truncated after 2 decimal places

Methods inherited from class physics.IMotion

setGravity

Methods inherited from class java.lang.Object

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

Constructor Detail

FrictionMotion

public FrictionMotion(CollisionObject colOb)

Creates a new FrictionMotion instance. and set up default values

Parameters:

colOb - a CollisionObject value

Method Detail

setCoefficient

public void setCoefficient(double c)

Sets the coefficient of friction

Overrides:

setCoefficient in class IMotion

Parameters:

c - a double

setVelocity

public void setVelocity(int dx,
                        int dy,
                        int speed)

Sets the velocity of the motion based on a dx, dy, and speed

Specified by:

setVelocity in class IMotion

Parameters:

dx - Change in x

dy - Change in y

speedTimer - delay

setDX

public void setDX(double d)

Set the dx direction

Overrides:

setDX in class IMotion

Parameters:

d - - the change in the x direction

setDY

public void setDY(double d)

Set the dy direction

Overrides:

setDY in class IMotion

Parameters:

d - the change in the y direction

getVelocity

public double getVelocity()

Return the velocity of the object based on dy and dx

Overrides:

getVelocity in class IMotion

Returns:

velocity

getSpeed

public int getSpeed()

Returns the speed of the motion

Specified by:

getSpeed in class IMotion

Returns:

the timer delay value

getDX

public int getDX()

Returns dx of the velocity

Specified by:

getDX in class IMotion

Returns:

change in x direction

getDY

public int getDY()

Returns dy of the velocity

Specified by:

getDY in class IMotion

Returns:

change in y direction

timerReact

public void timerReact()

Moves the object at intervals decided by the timer and checks for collisions

Specified by:

timerReact in class IMotion

setLocation

public void setLocation(double x,
                        double y)

Sets the location of the object based on a double value for x and y

Overrides:

setLocation in class IMotion

Parameters:

x - - x value

y - - y value

truncate

public static double truncate(double db)

Returns a truncated double truncated after 2 decimal places

Parameters:

db - - the double to truncate

Returns:

the truncated double

start

public void start()

Starts the MotionTimer for this motion

Specified by:

start in class IMotion

stop

public void stop()

Stops the MotionTimer for this object

Specified by:

stop in class IMotion

bounce

public void bounce(CollisionObject col)

A bounce for this motion

Specified by:

bounce in class IMotion

Parameters:

col - a CollisionObject value

stillCollide

public void stillCollide(CollisionObject col)

Checks to see if the object that has this motion, and the param are still colliding, and if so moves them apart

Parameters:

col - a CollisionObject value

calculateMomentum

public void calculateMomentum(CollisionObject col)

Calculates the momentum of this object using the line formulas and the angle of collision

Parameters:

col - a CollisionObject value

switchMomentum

public void switchMomentum(double m,
                           CollisionObject col)

Switchs the momentum of the the object with this motion and col

Overrides:

switchMomentum in class IMotion

Parameters:

m - - momentum

col - a CollisionObject value

changeMomentum

public void changeMomentum(double percentoff)

Changes the momentum of the object with this motion by subtracting the momentum it must give to the object with which it collided

Overrides:

changeMomentum in class IMotion

Parameters:

percentoff - a double value

getCollided

public boolean getCollided()

Return whether it has collided

Overrides:

getCollided in class IMotion

Returns:

a boolean value

setDX

public void setDX(int dx)

Sets the DX direction

Specified by:

setDX in class IMotion

setDY

public void setDY(int dy)

Sets the DY direction

Specified by:

setDY in class IMotion