Class b2Mat22

constructor

• new b2Mat22(): b2Mat22

• Empty constructor

  Returns b2Mat22

col1

col2

Abs

• Abs(): void

• Sets all internal matrix values to absolute values.

  Returns void

AddM

• AddM(m: b2Mat22): void

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

  Parameters

  • m: b2Mat22

    2x2 matrix to add.

  Returns void

Copy

• Copy(): b2Mat22

• Creates a copy of the matrix.

  Returns b2Mat22

  Copy of this 2x2 matrix.

GetAngle

• GetAngle(): number

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

  Returns number

  The rotation matrix angle (theta).

GetInverse

• 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.

Set

• Set(angle: number): void

• 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).

  Returns void

SetIdentity

• SetIdentity(): void

• Sets the 2x2 matrix to identity.

  Returns void

SetM

• SetM(m: b2Mat22): void

• Sets the 2x2 matrix from a 2x2 matrix.

  Parameters

  • m: b2Mat22

    2x2 matrix values.

  Returns void

SetVV

• SetVV(c1: b2Vec2, c2: b2Vec2): void

• Sets the 2x2 matrix from 2 column vectors.

  Parameters

  • c1: b2Vec2

    Column 1 vector.
  • c2: b2Vec2

    Column 2 vector.

  Returns void

SetZero

• SetZero(): void

• Sets the 2x2 matrix to all zeros.

  Returns void

Solve

• 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

StaticFromAngle

• FromAngle(angle: number): b2Mat22

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

  Parameters

  • angle: number

    Matrix angle (theta).

  Returns b2Mat22

  2x2 matrix.

StaticFromVV

• FromVV(c1: b2Vec2, c2: b2Vec2): b2Mat22

• Creates a 2x2 matrix from two columns.

  Parameters

  • c1: b2Vec2

    Column 1 vector.
  • c2: b2Vec2

    Column 2 vector.

  Returns b2Mat22

  2x2 matrix.