DOMMatrixReadOnly: fromFloat32Array() static method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2020.
Note: This feature is available in Web Workers.
The fromFloat32Array() static method of the DOMMatrixReadOnly interface creates a new DOMMatrixReadOnly object given an array of single-precision (32-bit) floating-point values.
If the array has 6 values, the result is a 2D matrix; if the array has 16 values, the result is a 3D matrix. Otherwise, a TypeError exception is thrown.
Syntax
DOMMatrixReadOnly.fromFloat32Array(array)
Parameters
array-
A
Float32Arraywith 6 or 16 elements in column-major order.
Return value
A DOMMatrixReadOnly object.
Exceptions
TypeError-
Thrown if the length of the
arrayparameter is not 6 or 16.
Examples
Creating a 2D matrix from a Float32Array
This example creates a 2D matrix from a 6-element Float32Array.
const float32Array = new Float32Array([1, 0, 0, 1, 10, 20]);
const matrix2D = DOMMatrixReadOnly.fromFloat32Array(float32Array);
console.log(matrix2D.toString());
// Output: matrix(1, 0, 0, 1, 10, 20)
console.log(matrix2D.is2D);
// Output: true
Creating a 3D matrix from a Float32Array
This example creates a 3D matrix from a 16-element Float32Array.
const float32Array = new Float32Array([
1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 10, 20, 30, 1,
]);
const matrix3D = DOMMatrixReadOnly.fromFloat32Array(float32Array);
console.log(matrix3D.is2D);
// Output: false
console.log(matrix3D.m41, matrix3D.m42, matrix3D.m43);
// Output: 10 20 30
Specifications
| Specification |
|---|
| Geometry Interfaces Module Level 1 # dom-dommatrixreadonly-fromfloat32array |
Browser compatibility
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