b2Mat33 Struct Reference

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

#include <b2Math.h>

Public Member Functions
	b2Mat33 ()
	The default constructor does nothing (for performance). More...
	b2Mat33 (const b2Vec3 &c1, const b2Vec3 &c2, const b2Vec3 &c3)
	Construct this matrix using columns. More...
void	SetZero ()
	Set this matrix to all zeros. More...
b2Vec3	Solve33 (const b2Vec3 &b) const
b2Vec2	Solve22 (const b2Vec2 &b) const
void	GetInverse22 (b2Mat33 *M) const
void	GetSymInverse33 (b2Mat33 *M) const
	Returns the zero matrix if singular. More...

Public Attributes
b2Vec3	ex
b2Vec3	ey
b2Vec3	ez

Detailed Description

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

Constructor & Destructor Documentation

b2Mat33 ( )

inline

The default constructor does nothing (for performance).

b2Mat33 ( const b2Vec3 &  c1, const b2Vec3 &  c2, const b2Vec3 &  c3  )

inline

Construct this matrix using columns.

Member Function Documentation

void GetInverse22

(

b2Mat33 *

M

)

const

Get the inverse of this matrix as a 2-by-2. Returns the zero matrix if singular.

void GetSymInverse33

(

b2Mat33 *

M

)

const

Returns the zero matrix if singular.

Get the symmetric inverse of this matrix as a 3-by-3. Returns the zero matrix if singular.

void SetZero ( )

inline

Set this matrix to all zeros.

b2Vec2 Solve22

(

const b2Vec2 &

b

)

const

Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases. Solve only the upper 2-by-2 matrix equation.

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

b2Vec3 Solve33

(

const b2Vec3 &

b

)

const

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

Member Data Documentation

b2Vec3 ex

b2Vec3 ey

b2Vec3 ez

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The documentation for this struct was generated from the following files:

• Box2D/Common/b2Math.h
• Box2D/Common/b2Math.cpp