A class representing a 3x3 [link:https://en.wikipedia.org/wiki/Matrix_(mathematics) matrix].

```
const m = new Matrix3();
```

The [page:set]() method takes arguments in [link:https://en.wikipedia.org/wiki/Row-_and_column-major_order#Column-major_order row-major]
order, while internally they are stored in the [page:.elements elements] array in column-major order.

This means that calling
```
m.set( 11, 12, 13,
21, 22, 23,
31, 32, 33 );
```

will result in the [page:.elements elements] array containing:
```
m.elements = [ 11, 21, 31,
12, 22, 32,
13, 23, 33 ];
```

and internally all calculations are performed using column-major ordering. However, as the actual ordering
makes no difference mathematically and most people are used to thinking about matrices in row-major order,
the three.js documentation shows matrices in row-major order. Just bear in mind that if you are reading the source
code, you'll have to take the [link:https://en.wikipedia.org/wiki/Transpose transpose] of any matrices outlined here to make sense of the calculations.

Creates and initializes the [name] to the 3x3 [link:https://en.wikipedia.org/wiki/Identity_matrix identity matrix].

A [link:https://en.wikipedia.org/wiki/Row-_and_column-major_order column-major] list of matrix values.

Creates a new Matrix3 and with identical elements to this one.

Copies the elements of matrix [page:Matrix3 m] into this matrix.

Computes and returns the [link:https://en.wikipedia.org/wiki/Determinant determinant] of this matrix.

Return true if this matrix and [page:Matrix3 m] are equal.

Extracts the [link:https://en.wikipedia.org/wiki/Basis_(linear_algebra) basis] of this
matrix into the three axis vectors provided. If this matrix is:
```
a, b, c,
d, e, f,
g, h, i
```

then the [page:Vector3 xAxis], [page:Vector3 yAxis], [page:Vector3 zAxis] will be set to:
```
xAxis = (a, d, g)
yAxis = (b, e, h)
zAxis = (c, f, i)
```

[page:Array array] - the array to read the elements from.

[page:Integer offset] - (optional) index of first element in the array. Default is 0.

Sets the elements of this matrix based on an array in
[link:https://en.wikipedia.org/wiki/Row-_and_column-major_order#Column-major_order column-major] format.

Inverts this matrix, using the [link:https://en.wikipedia.org/wiki/Invertible_matrix#Analytic_solution analytic method]. You can not invert with a determinant of zero. If you attempt this, the method produces a zero matrix instead.

[page:Matrix4 m] - [page:Matrix4]

Sets this matrix as the upper left 3x3 of the [link:https://en.wikipedia.org/wiki/Normal_matrix normal matrix]
of the passed [page:Matrix4 matrix4]. The normal matrix is the [link:https://en.wikipedia.org/wiki/Invertible_matrix inverse] [link:https://en.wikipedia.org/wiki/Transpose transpose]
of the matrix [page:Matrix4 m].

Resets this matrix to the 3x3 identity matrix:
```
1, 0, 0
0, 1, 0
0, 0, 1
```

Post-multiplies this matrix by [page:Matrix3 m].

Sets this matrix to [page:Matrix3 a] x [page:Matrix3 b].

Multiplies every component of the matrix by the scalar value *s*.

[page:Float n11] - value to put in row 1, col 1.

[page:Float n12] - value to put in row 1, col 2.

...

...

[page:Float n32] - value to put in row 3, col 2.

[page:Float n33] - value to put in row 3, col 3.

Sets the 3x3 matrix values to the given
[link:https://en.wikipedia.org/wiki/Row-_and_column-major_order row-major]
sequence of values.

Pre-multiplies this matrix by [page:Matrix3 m].

Set this matrx to the upper 3x3 matrix of the Matrix4 [page:Matrix4 m].

[page:Float tx] - offset x

[page:Float ty] - offset y

[page:Float sx] - repeat x

[page:Float sy] - repeat y

[page:Float rotation] - rotation (in radians)

[page:Float cx] - center x of rotation

[page:Float cy] - center y of rotation

Sets the UV transform matrix from offset, repeat, rotation, and center.

[page:Array array] - (optional) array to store the resulting vector in. If not given a new array will be created.

[page:Integer offset] - (optional) offset in the array at which to put the result.

Writes the elements of this matrix to an array in
[link:https://en.wikipedia.org/wiki/Row-_and_column-major_order#Column-major_order column-major] format.

[link:https://en.wikipedia.org/wiki/Transpose Transposes] this matrix in place.

[page:Array array] - array to store the resulting vector in.

[link:https://en.wikipedia.org/wiki/Transpose Transposes] this matrix into the supplied array,
and returns itself unchanged.

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]