Box2D  2.2.1
A 2D Physics Engine for Games
Public Member Functions | Public Attributes
b2Mat33 Struct Reference

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

#include <b2Math.h>

List of all members.

Public Member Functions

 b2Mat33 ()
 The default constructor does nothing (for performance).
 b2Mat33 (const b2Vec3 &c1, const b2Vec3 &c2, const b2Vec3 &c3)
 Construct this matrix using columns.
void SetZero ()
 Set this matrix to all zeros.
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.

Public Attributes

b2Vec3 ex
b2Vec3 ey
b2Vec3 ez

Detailed Description

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


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.

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.

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.

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.


The documentation for this struct was generated from the following files:
 All Classes Files Functions Variables Enumerations Enumerator Defines