Class Mat3

constructor

• new Mat3(elements?: Float32Array): Mat3

  Mat3 constructor

  Parameters

  • elements: Float32Array = ...

    initial array to use, default to identity matrix

  Returns Mat3

type

elements

set

• set(
      n11: number,
      n12: number,
      n13: number,
      n21: number,
      n22: number,
      n23: number,
      n31: number,
      n32: number,
      n33: number,
  ): Mat3

  Sets the matrix from 9 numbers

  Parameters

  • n11: number

    number

  • n12: number

    number

  • n13: number

    number

  • n21: number

    number

  • n22: number

    number

  • n23: number

    number

  • n31: number

    number

  • n32: number

    number

  • n33: number

    number

  Returns Mat3

  • this Mat3 after being set

identity

• identity(): Mat3

  Sets the Mat3 to an identity matrix

  Returns Mat3

  • this Mat3 after being set

setFromArray

• setFromArray(
      array?: number[] | Float32Array<ArrayBufferLike>,
      offset?: number,
  ): Mat3

  Sets the Mat3 values from an array

  Parameters

  • array: number[] | Float32Array<ArrayBufferLike> = ...

    array to use

  • offset: number = 0

    optional offset in the array to use

  Returns Mat3

  • this Mat3 after being set

copy

• copy(matrix?: Mat3): Mat3

  Copy another Mat3

  Parameters

  • matrix: Mat3 = ...

    matrix to copy

  Returns Mat3

  • this Mat3 after being set

clone

• clone(): Mat3

  Clone a Mat3

  Returns Mat3

  • cloned Mat3

setFromMat4

• setFromMat4(matrix?: Mat4): Mat3

  Set a Mat3 from a Mat4.

  Parameters

  • matrix: Mat4 = ...

    Mat4 to use.

  Returns Mat3

  • this Mat3 after being set.

multiply

• multiply(matrix?: Mat3): Mat3

  Multiply this Mat3 with another Mat3

  Parameters

  • matrix: Mat3 = ...

    Mat3 to multiply with

  Returns Mat3

  • this Mat3 after multiplication

premultiply

• premultiply(matrix?: Mat3): Mat3

  Multiply another Mat3 with this Mat3

  Parameters

  • matrix: Mat3 = ...

    Mat3 to multiply with

  Returns Mat3

  • this Mat3 after multiplication

multiplyMatrices

• multiplyMatrices(a?: Mat3, b?: Mat3): Mat3

  Multiply two Mat3

  Parameters

  • a: Mat3 = ...

    first Mat3

  • b: Mat3 = ...

    second Mat3

  Returns Mat3

  • Mat3 resulting from the multiplication

invert

• invert(): Mat3

  Invert this Mat3.

  Returns Mat3

  • this Mat3 after being inverted

transpose

• transpose(): Mat3

  Transpose this Mat3.

  Returns Mat3

  • this Mat3 after being transposed

getNormalMatrix

• getNormalMatrix(matrix?: Mat4): Mat3

  Compute a normal Mat3 matrix from a Mat4 transformation matrix.

  Parameters

  • matrix: Mat4 = ...

    Mat4 transformation matrix

  Returns Mat3

  • this Mat3 after being inverted and transposed

setUVTransform

• setUVTransform(
      tx?: number,
      ty?: number,
      sx?: number,
      sy?: number,
      rotation?: number,
      cx?: number,
      cy?: number,
  ): Mat3

  Set a transformation matrix from translation, scale and center 2D coordinates and a rotation. Useful to compute UV transformation matrices.

  Parameters

  • tx: number = 0

    translation along X axis.

  • ty: number = 0

    translation along Y axis.

  • sx: number = 1

    Scale along X axis.

  • sy: number = 1

    Scale along Y axis.

  • rotation: number = 0

    Rotation in radians.

  • cx: number = 0

    Center of the transformation along X axis.

  • cy: number = 0

    Center of the transformation along Y axis.

  Returns Mat3

rotateByAngleX

• rotateByAngleX(theta?: number): Mat3

  Rotate this Mat3 by a given angle around X axis, counterclockwise.

  Parameters

  • theta: number = 0

    Angle to rotate along X axis.

  Returns Mat3

  • this Mat3 after rotation.

rotateByAngleY

• rotateByAngleY(theta?: number): Mat3

  Rotate this Mat3 by a given angle around Y axis, counterclockwise.

  Parameters

  • theta: number = 0

    Angle to rotate along Y axis.

  Returns Mat3

  • this Mat3 after rotation.

rotateByAngleZ

• rotateByAngleZ(theta?: number): Mat3

  Rotate this Mat3 by a given angle around Z axis, counterclockwise.

  Parameters

  • theta: number = 0

    Angle to rotate along Z axis.

  Returns Mat3

  • this Mat3 after rotation.

premultiplyTranslate

• premultiplyTranslate(vector?: Vec2): Mat3

  premultiply this Mat3 by a translate matrix (i.e. translateMatrix = new Mat3().translate(vector)).

  Parameters

  • vector: Vec2 = ...

    translation Vec2 to use.

  Returns Mat3

  • this Mat3 after the premultiply translate operation.

premultiplyScale

• premultiplyScale(vector?: Vec2): Mat3

  premultiply this Mat3 by a scale matrix (i.e. translateMatrix = new Mat3().scale(vector)).

  Parameters

  • vector: Vec2 = ...

    scale Vec2 to use.

  Returns Mat3

  • this Mat3 after the premultiply scale operation.

translate

• translate(vector?: Vec2): Mat3

  Translate a Mat3.

  Parameters

  • vector: Vec2 = ...

    translation Vec2 to use.

  Returns Mat3

  • translated Mat3.