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	GetInverse22 (b2Mat33 *M) const
void	GetSymInverse33 (b2Mat33 *M) const
	Returns the zero matrix if singular. More...
void	SetZero ()
	Set this matrix to all zeros. More...
b2Vec2	Solve22 (const b2Vec2 &b) const
b2Vec3	Solve33 (const b2Vec3 &b) const

Public Attributes
b2Vec3	ex
b2Vec3	ey
b2Vec3	ez

Detailed Description

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

Definition at line 257 of file b2Math.h.

Constructor & Destructor Documentation

b2Mat33::b2Mat33 ( )

inline

The default constructor does nothing (for performance).

Definition at line 260 of file b2Math.h.

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

inline

Construct this matrix using columns.

Definition at line 263 of file b2Math.h.

Member Function Documentation

void b2Mat33::GetInverse22

(

b2Mat33 *

M

)

const

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

Definition at line 56 of file b2Math.cpp.

void b2Mat33::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.

Definition at line 71 of file b2Math.cpp.

void b2Mat33::SetZero ( )

inline

Set this matrix to all zeros.

Definition at line 271 of file b2Math.h.

b2Vec2 b2Mat33::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.

Definition at line 41 of file b2Math.cpp.

b2Vec3 b2Mat33::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.

Definition at line 25 of file b2Math.cpp.

Member Data Documentation

b2Vec3 b2Mat33::ex

Definition at line 295 of file b2Math.h.

b2Vec3 b2Mat33::ey

Definition at line 295 of file b2Math.h.

b2Vec3 b2Mat33::ez

Definition at line 295 of file b2Math.h.

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

• b2Math.h
• b2Math.cpp