city.cs.engine

Class Fixture

java.lang.Object

city.cs.engine.Fixture

Direct Known Subclasses:

GhostlyFixture, Sensor, SolidFixture

public abstract class Fixture
extends Object

A component of a rigid body. A body can have multiple fixtures but each fixture remains part of a single body. A fixture can be destroyed, removing it from the body, but cannot be attached to another body.

Method Summary

Modifier and Type	Method and Description
boolean	contains(Vec2 p) Is the point inside this fixture?
void	destroy() Remove this fixture from the parent body and the world.
Body	getBody() The body of which this fixture forms a part.
float	getDensity() The current density of this fixture.
boolean	intersects(Fixture f) Does this fixture currently overlap a given other fixture.
boolean	intersects(Vec2 centre, float halfWidth, float halfHeight) Does this fixture currently overlap a given axis-aligned rectangle.
void	setDensity(float density) Set the density of this fixture.

Methods inherited from class java.lang.Object

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

Method Detail

destroy

public void destroy()

Remove this fixture from the parent body and the world. This fixture must not be accessed after being destroyed. All fixtures attached to a body are implicitly destroyed when the body is destroyed, so this method is only needed if part of a body is to be destroyed, leaving the rest intact.

setDensity

public void setDensity(float density)

Set the density of this fixture.

Parameters:

density - the new density (in kg per square metre)

getDensity

public float getDensity()

The current density of this fixture.

Returns:

density (in kg per square metre)

getBody

public Body getBody()

The body of which this fixture forms a part.

Returns:

the parent body

contains

public boolean contains(Vec2 p)

Is the point inside this fixture?

Parameters:

p - a point in world coordinates

Returns:

true if p is inside this fixture

intersects

public boolean intersects(Fixture f)

Does this fixture currently overlap a given other fixture.

Parameters:

f - the other fixture

Returns:

true if this fixture overlaps the other fixture

intersects

public boolean intersects(Vec2 centre,
                          float halfWidth,
                          float halfHeight)

Does this fixture currently overlap a given axis-aligned rectangle.

Parameters:

centre - the centre of the rectangle in world coordinates

halfWidth - the half width of the rectangle in world units

halfHeight - the half height of the rectangle in world units

Returns:

true if the fixture overlaps the rectangle, false otherwise