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Matrix2D

class Matrix2D implements TypeWebGLConvertible

A specialized 2x3 Matrix representing a 2D transformation.

A Matrix2D contains six elements defined as [a, b, c, d, tx, ty]

This is a shortcut for a 3x3 matrix of the form [a, b, 0, c, d, 0 tx, ty, 1]

Note that because a Matrix2D ignores the z-values of each component vectors, it does not satisfy all properties of a "real" 3x3 matrix.

  • A Matrix2D has no transpose
  • A(B + C) = AB + AC does not hold for a Matrix2D
  • (rA)^-1 = r^-1 A^-1, r != 0 does not hold for a Matrix2D
  • r(AB) = (rA)B = A(rB) does not hold for a Matrix2D

Constructors​

constructor​

public new Matrix2D(): Matrix2D
public new Matrix2Dmatrix: PossibleMatrix2D: Matrix2D
public new Matrix2Dx: PossibleVector2numbery: PossibleVector2numberz: PossibleVector2number: Matrix2D
public new Matrix2Da: numberb: numberc: numberd: numbertx: numberty: number: Matrix2D

Properties​

values​

readonly public values: Float32Array = ...

identity​

static readonly public identity: Matrix2D = ...

symbol​

static readonly public symbol: typeof symbol = ...

zero​

static readonly public zero: Matrix2D = ...

Accessors​

determinant​

public get determinant(): number

Get the determinant of the matrix.

domMatrix​

public get domMatrix(): DOMMatrix

inverse​

public get inverse(): nullMatrix2D

Get the inverse of the matrix.

If the matrix is not invertible, i.e. its determinant is 0, this will return null, instead.

Examples

rotation​

public set rotationangle: number: void
public get rotation(): number

Parameters

scaleX​

public set scaleXvalue: number: void
public get scaleX(): number

Parameters

scaleY​

public set scaleYvalue: number: void
public get scaleY(): number

Parameters

scaling​

public set scalingvalue: PossibleVector2number: void
public get scaling(): Vector2

Parameters

skewX​

public set skewXvalue: number: void
public get skewX(): number

Parameters

skewY​

public set skewYvalue: number: void
public get skewY(): number

Parameters

translateX​

public set translateXvalue: number: void
public get translateX(): number

Parameters

translateY​

public set translateYvalue: number: void
public get translateY(): number

Parameters

translation​

public set translationtranslation: PossibleVector2number: void
public get translation(): Vector2

Parameters

x​

public get x(): Vector2

y​

public get y(): Vector2

Methods​

add​

public addother: Matrix2D: Matrix2D

Add the provided matrix to this matrix.

This method returns a new matrix representing the result of the computation. It will not modify the source matrix.

Examples

Parameters

column​

public columnindex: number: Vector2

Get the nth component vector of the matrix. Only defined for 0, 1, and 2.

Examples

Parameters

  • index: number

    The index of the component vector to retrieve.

equals​

public equalsother: Matrix2Dthreshold: number = EPSILON: boolean

Parameters

exactlyEquals​

public exactlyEqualsother: Matrix2D: boolean

Parameters

mul​

public mulother: Matrix2D: Matrix2D

Returns the matrix product of this matrix with the provided matrix.

This method returns a new matrix representing the result of the computation. It will not modify the source matrix.

Examples

Parameters

mulScalar​

public mulScalars: number: Matrix2D

Multiply each value of the matrix by a scalar.

Examples

Parameters

  • s: number

    The value by which to scale each term

rotate​

public rotateangle: numberdegrees: boolean = true: Matrix2D

Rotate the matrix by the provided angle. By default, the angle is provided in degrees.

This method returns a new matrix representing the result of the computation. It will not modify the source matrix.

Examples

Parameters

  • angle: number

    The angle by which to rotate the matrix.

  • degrees: boolean = true

    Whether the angle is provided in degrees.

row​

public rowindex: number: numbernumbernumber

Returns the nth row of the matrix. Only defined for 0 and 1.

Examples

Parameters

  • index: number

    The index of the row to retrieve.

scale​

public scalevec: PossibleVector2number: Matrix2D

Scale the x and y component vectors of the matrix.

If vec is provided as a vector, the x and y component vectors of the matrix will be scaled by the x and y parts of the vector, respectively.

If vec is provided as a scalar, the x and y component vectors will be scaled uniformly by this factor.

This method returns a new matrix representing the result of the computation. It will not modify the source matrix.

Examples

Parameters

sub​

public subother: Matrix2D: Matrix2D

Subtract the provided matrix from this matrix.

This method returns a new matrix representing the result of the computation. It will not modify the source matrix.

Examples

Parameters

toSymbol​

public toSymbol(): symbol

toUniform​

public toUniformgl: WebGL2RenderingContextlocation: WebGLUniformLocation: void

Parameters

  • gl: WebGL2RenderingContext
  • location: WebGLUniformLocation

translate​

public translatevec: PossibleVector2number: Matrix2D

Translate the matrix by the dimensions of the provided vector.

If vec is provided as a scalar, matrix will be translated uniformly by this factor.

This method returns a new matrix representing the result of the computation. It will not modify the source matrix.

Examples

Parameters

fromRotation​

static public fromRotationangle: number: Matrix2D

Parameters

fromScaling​

static public fromScalingscale: PossibleVector2number: Matrix2D

Parameters

fromTranslation​

static public fromTranslationtranslation: PossibleVector2number: Matrix2D

Parameters