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). | |
b2Mat33 (const b2Vec3 &c1, const b2Vec3 &c2, const b2Vec3 &c3) | |
Construct this matrix using columns. | |
void | GetInverse22 (b2Mat33 *M) const |
void | GetSymInverse33 (b2Mat33 *M) const |
Returns the zero matrix if singular. | |
void | SetZero () |
Set this matrix to all zeros. | |
b2Vec2 | Solve22 (const b2Vec2 &b) const |
b2Vec3 | Solve33 (const b2Vec3 &b) const |
Public Attributes | |
b2Vec3 | ex |
b2Vec3 | ey |
b2Vec3 | ez |
b2Mat33::b2Mat33 | ( | ) | [inline] |
b2Mat33::b2Mat33 | ( | const b2Vec3 & | c1, |
const b2Vec3 & | c2, | ||
const b2Vec3 & | c3 | ||
) | [inline] |
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] |
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.