Package edu.cornell.gdiac.physics2

Class BoxObstacle

java.lang.Object

edu.cornell.gdiac.physics2.Obstacle

edu.cornell.gdiac.physics2.BoxObstacle

public class BoxObstacle
extends Obstacle

Box-shaped model to support collisions.

This model is designed for rectangular Box2d objects. Unless otherwise specified, the center of mass is the center of the rectangle.

Field Summary

Fields

Modifier and Type	Field	Description
protected com.badlogic.gdx.physics.box2d.PolygonShape	shape	Shape information for this box

Fields inherited from class edu.cornell.gdiac.physics2.Obstacle

body, bodyinfo, centroidCache, DEFAULT_UNITS, fixture, massdata, masseffect, outline, positionCache, transform, units, velocityCache

Constructor Summary

Constructors

Constructor	Description
BoxObstacle()	Creates a degnerate box at the origin.
BoxObstacle(float width, float height)	Creates a new box at the origin.
BoxObstacle(float x, float y, float width, float height)	Creates a new box object.

Method Summary

Modifier and Type	Method	Description
protected void	createFixtures()	Creates new fixtures for this body, defining the shape
com.badlogic.gdx.math.Vector2	getDimension()	Returns the dimensions of this box
float	getHeight()	Returns the box height
float	getWidth()	Returns the box width
protected void	releaseFixtures()	Releases the fixtures for this body, reseting the shape
void	setDimension(float width, float height)	Sets the dimensions of this box
void	setDimension(com.badlogic.gdx.math.Vector2 value)	Sets the dimensions of this box
void	setHeight(float value)	Sets the box height
void	setWidth(float value)	Sets the box width

Methods inherited from class edu.cornell.gdiac.physics2.Obstacle

activatePhysics, deactivatePhysics, draw, draw, draw, draw, getAngle, getAngularDamping, getAngularVelocity, getBody, getBodyType, getCentroid, getDensity, getFilterData, getFriction, getGravityScale, getInertia, getLinearDamping, getLinearVelocity, getMass, getName, getOutline, getPhysicsUnits, getPosition, getRestitution, getUserData, getVX, getVY, getX, getY, isActive, isAwake, isBullet, isDirty, isFixedRotation, isRemoved, isSensor, isSleepingAllowed, markDirty, markRemoved, resetMass, setActive, setAngle, setAngularDamping, setAngularVelocity, setAwake, setBodyState, setBodyType, setBullet, setCentroid, setDensity, setFilterData, setFixedRotation, setFriction, setGravityScale, setInertia, setLinearDamping, setLinearVelocity, setMass, setName, setPhysicsUnits, setPosition, setPosition, setRestitution, setSensor, setSleepingAllowed, setUserData, setVX, setVY, setX, setY, update

Methods inherited from class java.lang.Object

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

Field Details

shape

protected com.badlogic.gdx.physics.box2d.PolygonShape shape

Shape information for this box

Constructor Details

BoxObstacle

public BoxObstacle()

Creates a degnerate box at the origin.

This box has no size, and so will not support collisions (e.g. it is only a body). You should setDimension(com.badlogic.gdx.math.Vector2) before activating this physics object.

BoxObstacle

public BoxObstacle(float width,
 float height)

Creates a new box at the origin.

The size is expressed in physics units NOT pixels. In order for drawing to work properly, you MUST call Obstacle.setPhysicsUnits(float).

Parameters:

width - The object width in physics units

height - The object width in physics units

BoxObstacle

public BoxObstacle(float x,
 float y,
 float width,
 float height)

Creates a new box object.

The size is expressed in physics units NOT pixels. In order for drawing to work properly, you MUST call Obstacle.setPhysicsUnits(float).

Parameters:

x - Initial x position of the box center

y - Initial y position of the box center

width - The object width in physics units

height - The object width in physics units

Method Details

getDimension

public com.badlogic.gdx.math.Vector2 getDimension()

Returns the dimensions of this box

This method does NOT return a reference to the dimension vector. Changes to this vector will not affect the shape. However, it returns the same vector each time its is called, and so cannot be used as an allocator.

Returns:

the dimensions of this box

setDimension

public void setDimension(com.badlogic.gdx.math.Vector2 value)

Sets the dimensions of this box

This method does not keep a reference to the parameter.

Parameters:

value - the dimensions of this box

setDimension

public void setDimension(float width,
 float height)

Sets the dimensions of this box

Parameters:

width - The width of this box

height - The height of this box

getWidth

public float getWidth()

Returns the box width

Returns:

the box width

setWidth

public void setWidth(float value)

Sets the box width

Parameters:

value - the box width

getHeight

public float getHeight()

Returns the box height

Returns:

the box height

setHeight

public void setHeight(float value)

Sets the box height

Parameters:

value - the box height

createFixtures

protected void createFixtures()

Creates new fixtures for this body, defining the shape

This is the primary method to override for custom physics objects

Specified by:

createFixtures in class Obstacle

releaseFixtures

protected void releaseFixtures()

Releases the fixtures for this body, reseting the shape

This is the primary method to override for custom physics objects

Specified by:

releaseFixtures in class Obstacle