Class Matrix3x3

Represents a 3x3 matrix.

Index

Constructors

Properties

Methods

adjugate bound det get inverse scale subMatrixExcludingPosition times timesMatrix toString transpose fromArray identity rotationDegrees translation

Constructors

constructor

new Matrix3x3(elements): Matrix3x3
Parameters
- elements: number[][]
Returns Matrix3x3
- Defined in src/Matrix3x3.ts:9

Properties

`Private` elements

elements: number[][]

Methods

adjugate

adjugate(): Matrix3x3
Finds the adjugate matrix for this matrix.

Returns Matrix3x3
- Defined in src/Matrix3x3.ts:164

`Private` bound

bound(i): number
Returns a value in the interval [0, 2]. By adding or subtracting 3 to the input value.
Parameters
- i: number
Returns number
- Defined in src/Matrix3x3.ts:198

det

det(): number
Calculates the determinant of the matrix.

Returns number
- Defined in src/Matrix3x3.ts:212

get

get(y, x): number
Returns the element in the given position.
Parameters
- y: number
  The y of the element.
- x: number
  The x of the element
Returns number
- Defined in src/Matrix3x3.ts:87

inverse

inverse(): Optional<Matrix3x3>
Returns an inversed version of this matrix.

Returns Optional<Matrix3x3>
- Defined in src/Matrix3x3.ts:130

scale

scale(scalar): Matrix3x3
Returns a version of this matrix where all elements are multiplied by the given scalar.
Parameters
- scalar: number
Returns Matrix3x3
- Defined in src/Matrix3x3.ts:142

`Private` subMatrixExcludingPosition

subMatrixExcludingPosition(x, y): Matrix2x2
Gets the sub matrix excluding a given position. This is used to calculate the adjugate for example. This method always makes the top left element of the new matrix to be the element at the bottom right of the excluded position. If the excluded position is the bottom right of the matrix, the selection wraps and hence chooses the top left of the main matrix to be the top left position of the sub matrix.
Parameters
- x: number
- y: number
Returns Matrix2x2
- Defined in src/Matrix3x3.ts:184

times

times(vArray): number[]
Multiplies this matrix with an array of numbers.
Parameters
- vArray: number[]
Returns number[]
- Defined in src/Matrix3x3.ts:113

timesMatrix

timesMatrix(m): Matrix3x3
Multiplies this matrix with another matrix.
Parameters
- m: Matrix3x3
Returns Matrix3x3
- Defined in src/Matrix3x3.ts:94

toString

toString(): string
Returns a string representation of this matrix.

Returns string
- Defined in src/Matrix3x3.ts:122

transpose

transpose(): Matrix3x3
Returns the transpose of this matrix.

Returns Matrix3x3
- Defined in src/Matrix3x3.ts:150

`Static` fromArray

fromArray(a): Matrix3x3
Returns a 3x3 Matrix from an array. The element in the array are given in the following places: [(0,0), (1,0), (2,0), (0,1), (1,1), (2,1), (0,2), (1,2), (2,2)]
Parameters
- a: number[]
Returns Matrix3x3
- Defined in src/Matrix3x3.ts:74

`Static` identity

identity(): Matrix3x3
Returns an identity matrix 3x3.

Returns Matrix3x3
- Defined in src/Matrix3x3.ts:53

`Static` rotationDegrees

rotationDegrees(degrees): Matrix3x3
Returns a rotation matrix with the given degrees. that rotates a vector clockwise.
Parameters
- degrees: number
Returns Matrix3x3
- Defined in src/Matrix3x3.ts:16

`Static` translation

translation(x, y): Matrix3x3
Returns a transform matrix that moves a point by x, y.
Parameters
- x: number
- y: number
Returns Matrix3x3
- Defined in src/Matrix3x3.ts:35

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