Class b2Mat22

public Abs()

Sets all internal matrix values to absolute values.

public AddM(m: b2Mat22)

Adds the two 2x2 matricies together and stores the result in this matrix.

Parameters

• m: b2Mat22

  2x2 matrix to add.

public Copy(): b2Mat22

Creates a copy of the matrix.

Returns

b2Mat22

Copy of this 2x2 matrix.

public GetAngle(): number

Gets the rotation matrix angle. R(theta) = [ cos(theta) -sin(theta) ] [ sin(theta) cos(theta) ]

Returns

number

The rotation matrix angle (theta).

public GetInverse(out: b2Mat22): b2Mat22

Compute the inverse of this matrix, such that inv(A) A = identity.

Parameters

• out: b2Mat22

  Inverse matrix.

Returns

b2Mat22

Inverse matrix.

public Set(angle: number)

Sets the 2x2 rotation matrix from the given angle. R(theta) = [ cos(theta) -sin(theta) ] [ sin(theta) cos(theta) ]

Parameters

• angle: number

  Matrix angle (theta).

public SetIdentity()

Sets the 2x2 matrix to identity.

public SetM(m: b2Mat22)

Sets the 2x2 matrix from a 2x2 matrix.

Parameters

• m: b2Mat22

  2x2 matrix values.

public SetVV(c1: b2Vec2, c2: b2Vec2)

Sets the 2x2 matrix from 2 column vectors.

Parameters

• c1: b2Vec2

  Column 1 vector.

• c2: b2Vec2

  Column 2 vector.

public SetZero()

Sets the 2x2 matrix to all zeros.

public Solve(out: b2Vec2, bX: number, bY: number): b2Vec2

TODO, has something to do with the determinant

Parameters

• out: b2Vec2

  Solved vector

• bX: number

• bY: number

Returns

b2Vec2

Solved vector