Package org.jbox2d.common

Class Mat33

java.lang.Object

org.jbox2d.common.Mat33

All Implemented Interfaces:

Serializable

public class Mat33
extends Object
implements Serializable

A 3-by-3 matrix. Stored in column-major order.

Author:

Daniel Murphy

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
final Vec3	ex
final Vec3	ey
final Vec3	ez
static final Mat33	IDENTITY

Constructor Summary

Constructors

Constructor	Description
Mat33()
Mat33(float exx, float exy, float exz, float eyx, float eyy, float eyz, float ezx, float ezy, float ezz)
Mat33(Vec3 argCol1, Vec3 argCol2, Vec3 argCol3)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
void	getInverse22(Mat33 M)
void	getSymInverse33(Mat33 M)
int	hashCode()
static Vec3	mul(Mat33 A, Vec3 v)	Multiply a matrix times a vector.
static Vec2	mul22(Mat33 A, Vec2 v)
static void	mul22ToOut(Mat33 A, Vec2 v, Vec2 out)
static void	mul22ToOutUnsafe(Mat33 A, Vec2 v, Vec2 out)
static void	mulToOut(Mat33 A, Vec3 v, Vec3 out)
static void	mulToOutUnsafe(Mat33 A, Vec3 v, Vec3 out)
void	set(float exx, float exy, float exz, float eyx, float eyy, float eyz, float ezx, float ezy, float ezz)
void	set(Mat33 mat)
void	setIdentity()
static void	setScaleTransform(float scale, Mat33 out)
void	setZero()
final Vec2	solve22(Vec2 b)	Solve A * x = b, where b is a column vector.
final void	solve22ToOut(Vec2 b, Vec2 out)	Solve A * x = b, where b is a column vector.
final Vec3	solve33(Vec3 b)	Solve A * x = b, where b is a column vector.
final void	solve33ToOut(Vec3 b, Vec3 out)	Solve A * x = b, where b is a column vector.

Methods inherited from class java.lang.Object

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

Field Details

IDENTITY

public static final Mat33 IDENTITY

ex

public final Vec3 ex

ey

public final Vec3 ey

ez

public final Vec3 ez

Constructor Details

Mat33

public Mat33()

Mat33

public Mat33(float exx,
 float exy,
 float exz,
 float eyx,
 float eyy,
 float eyz,
 float ezx,
 float ezy,
 float ezz)

Mat33

public Mat33(Vec3 argCol1,
 Vec3 argCol2,
 Vec3 argCol3)

Method Details

setZero

public void setZero()

set

public void set(float exx,
 float exy,
 float exz,
 float eyx,
 float eyy,
 float eyz,
 float ezx,
 float ezy,
 float ezz)

set

public void set(Mat33 mat)

setIdentity

public void setIdentity()

mul

public static Vec3 mul(Mat33 A,
 Vec3 v)

Multiply a matrix times a vector.

mul22

public static Vec2 mul22(Mat33 A,
 Vec2 v)

mul22ToOut

public static void mul22ToOut(Mat33 A,
 Vec2 v,
 Vec2 out)

mul22ToOutUnsafe

public static void mul22ToOutUnsafe(Mat33 A,
 Vec2 v,
 Vec2 out)

mulToOut

public static void mulToOut(Mat33 A,
 Vec3 v,
 Vec3 out)

mulToOutUnsafe

public static void mulToOutUnsafe(Mat33 A,
 Vec3 v,
 Vec3 out)

solve22

public final Vec2 solve22(Vec2 b)

Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases.

solve22ToOut

public final void solve22ToOut(Vec2 b,
 Vec2 out)

Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases.

solve33

public final Vec3 solve33(Vec3 b)

Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases.

solve33ToOut

public final void solve33ToOut(Vec3 b,
 Vec3 out)

Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases.

Parameters:

b -

out - The result.

getInverse22

public void getInverse22(Mat33 M)

getSymInverse33

public void getSymInverse33(Mat33 M)

setScaleTransform

public static void setScaleTransform(float scale,
 Mat33 out)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object