com.badlogic.gdx.physics.box2d

Class Transform

java.lang.Object

com.badlogic.gdx.physics.box2d.Transform

public class Transform
extends java.lang.Object

Encodes a Box2D transform. We are lazy so we only store a 4 float wide array. First two floats are the position of the b2Transform struct. Next two floats are the cosine and sine of the rotation angle.

Author:

mzechner

Field Summary

Fields

Modifier and Type	Field and Description
static int	COS
static int	POS_X
static int	POS_Y
static int	SIN
float[]	vals

Constructor Summary

Constructors

Constructor and Description
Transform()
Transform(Vector2 position, float angle) Constructs a new Transform instance with the given position and angle
Transform(Vector2 position, Vector2 orientation) Constructs a new Transform instance with the given position and orientation

Method Summary

Modifier and Type	Method and Description
Vector2	getOrientation()
Vector2	getPosition()
float	getRotation()
Vector2	mul(Vector2 v) Transforms the given vector by this transform
void	setOrientation(Vector2 orientation) Set where the body should "look at"
void	setPosition(Vector2 pos) Sets the position of this transform
void	setRotation(float angle) Sets the rotation of this transform

Methods inherited from class java.lang.Object

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

Field Detail

POS_X

public static final int POS_X

See Also:

Constant Field Values

POS_Y

public static final int POS_Y

See Also:

Constant Field Values

COS

public static final int COS

See Also:

Constant Field Values

SIN

public static final int SIN

See Also:

Constant Field Values

vals

public float[] vals

Constructor Detail

Transform

public Transform()

Transform

public Transform(Vector2 position,
                 float angle)

Constructs a new Transform instance with the given position and angle

Parameters:

position - the position

angle - the angle in radians

Transform

public Transform(Vector2 position,
                 Vector2 orientation)

Constructs a new Transform instance with the given position and orientation

Parameters:

position - the position

orientation - where the transform is pointing

Method Detail

mul

public Vector2 mul(Vector2 v)

Transforms the given vector by this transform

Parameters:

v - the vector

getPosition

public Vector2 getPosition()

Returns:

the position, modification of the vector has no effect on the Transform

setRotation

public void setRotation(float angle)

Sets the rotation of this transform

Parameters:

angle - angle in radians

getRotation

public float getRotation()

getOrientation

public Vector2 getOrientation()

Returns:

A vector 2 pointing to where the body is facing

setOrientation

public void setOrientation(Vector2 orientation)

Set where the body should "look at"

setPosition

public void setPosition(Vector2 pos)

Sets the position of this transform

Parameters:

pos - the position