b2Mat22 Struct Reference

A 2-by-2 matrix. Stored in column-major order. More...

#include <b2Math.h>

Public Member Functions
	b2Mat22 ()
	The default constructor does nothing (for performance). More...
	b2Mat22 (const b2Vec2 &c1, const b2Vec2 &c2)
	Construct this matrix using columns. More...
	b2Mat22 (float32 a11, float32 a12, float32 a21, float32 a22)
	Construct this matrix using scalars. More...
b2Mat22	GetInverse () const
void	Set (const b2Vec2 &c1, const b2Vec2 &c2)
	Initialize this matrix using columns. More...
void	SetIdentity ()
	Set this to the identity matrix. More...
void	SetZero ()
	Set this matrix to all zeros. More...
b2Vec2	Solve (const b2Vec2 &b) const

Public Attributes
b2Vec2	ex
b2Vec2	ey

Detailed Description

A 2-by-2 matrix. Stored in column-major order.

Definition at line 182 of file b2Math.h.

Constructor & Destructor Documentation

b2Mat22::b2Mat22 ( )

inline

The default constructor does nothing (for performance).

Definition at line 185 of file b2Math.h.

b2Mat22::b2Mat22 ( const b2Vec2 &  c1, const b2Vec2 &  c2  )

inline

Construct this matrix using columns.

Definition at line 188 of file b2Math.h.

b2Mat22::b2Mat22 ( float32  a11, float32  a12, float32  a21, float32  a22  )

inline

Construct this matrix using scalars.

Definition at line 195 of file b2Math.h.

Member Function Documentation

b2Mat22 b2Mat22::GetInverse ( ) const

inline

Definition at line 222 of file b2Math.h.

void b2Mat22::Set ( const b2Vec2 &  c1, const b2Vec2 &  c2  )

inline

Initialize this matrix using columns.

Definition at line 202 of file b2Math.h.

void b2Mat22::SetIdentity ( )

inline

Set this to the identity matrix.

Definition at line 209 of file b2Math.h.

void b2Mat22::SetZero ( )

inline

Set this matrix to all zeros.

Definition at line 216 of file b2Math.h.

b2Vec2 b2Mat22::Solve ( const b2Vec2 &  b ) const

inline

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 238 of file b2Math.h.

Member Data Documentation

b2Vec2 b2Mat22::ex

Definition at line 252 of file b2Math.h.

b2Vec2 b2Mat22::ey

Definition at line 252 of file b2Math.h.

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

• b2Math.h