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Box2D
2.3.0
A 2D Physics Engine for Games
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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). | |
| b2Mat22 (const b2Vec2 &c1, const b2Vec2 &c2) | |
| Construct this matrix using columns. | |
| b2Mat22 (float32 a11, float32 a12, float32 a21, float32 a22) | |
| Construct this matrix using scalars. | |
| void | Set (const b2Vec2 &c1, const b2Vec2 &c2) |
| Initialize this matrix using columns. | |
| void | SetIdentity () |
| Set this to the identity matrix. | |
| void | SetZero () |
| Set this matrix to all zeros. | |
| b2Mat22 | GetInverse () const |
| b2Vec2 | Solve (const b2Vec2 &b) const |
Public Attributes | |
| b2Vec2 | ex |
| b2Vec2 | ey |
A 2-by-2 matrix. Stored in column-major order.
Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases.
1.8.14