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Class: TransformUtils

Defined in: utils/TransformUtils.ts:9

Utility methods for converting between SimilarityTransform objects and gl-matrix mat3 matrices

Constructors​

Constructor​

new TransformUtils(): TransformUtils

Returns​

TransformUtils

Methods​

asGLMat3x2()​

static asGLMat3x2(m): number[]

Defined in: utils/TransformUtils.ts:74

Extracts a column-major mat3x2 (3 columns × 2 rows) from a mat3, discarding the third row

Parameters​

m​

mat3

The source matrix

Returns​

number[]

fromSimilarityMatrix()​

static fromSimilarityMatrix(m): SimilarityTransform

Defined in: utils/TransformUtils.ts:18

Decomposes a 3×3 similarity matrix into a SimilarityTransform

Extracts uniform scale, rotation (in degrees), and translation from a column-major gl-matrix mat3.

Parameters​

m​

mat3

The source matrix

Returns​

SimilarityTransform

toSimilarityMatrix()​

static toSimilarityMatrix(tf, options?): mat3

Defined in: utils/TransformUtils.ts:36

Builds a 3×3 similarity matrix from a (partial) SimilarityTransform

Applies, in order: scale, rotation (around center if provided), and translation.

Parameters​

tf​

Partial<SimilarityTransform>

The transform components (all optional)

options?​

Optional rotation center in pre-scaled coordinates

center?​

{ x: number; y: number; }

center.x​

number

center.y​

number

Returns​

mat3

transposeAsGLMat2x4()​

static transposeAsGLMat2x4(m): number[]

Defined in: utils/TransformUtils.ts:86

Transposes a mat3 and extracts a column-major mat2x4 (2 columns × 4 rows), zero-padded in the fourth row

Parameters​

m​

mat3

The source matrix

Returns​

number[]