[Home](./index.md) > [server](./server.md) > [Matrix3](./server.matrix3.md) ## Matrix3 class Represents a 3x3 matrix. **Signature:** ```typescript export default class Matrix3 extends Float32Array ``` **Extends:** Float32Array ## Remarks All matrix methods result in mutation of the matrix instance. This class extends `Float32Array` to provide an efficient way to create and manipulate a 3x3 matrix. Various convenience methods are provided for common matrix operations. ## Constructors

Constructor	Modifiers	Description
[(constructor)(m00, m01, m02, m10, m11, m12, m20, m21, m22)](./server.matrix3._constructor_.md)		Constructs a new instance of the `Matrix3` class

## Properties

Property	Modifiers	Type	Description
[determinant](./server.matrix3.determinant.md)	`readonly`	number	The determinant of the matrix.
[frobeniusNorm](./server.matrix3.frobeniusnorm.md)	`readonly`	number	The frobenius norm of the matrix.

## Methods

Method	Modifiers	Description
[add(matrix3)](./server.matrix3.add.md)		Adds a matrix to the current matrix.
[adjoint()](./server.matrix3.adjoint.md)		Sets the adjugate of the current matrix.
[clone()](./server.matrix3.clone.md)		Clones the current matrix.
[copy(matrix3)](./server.matrix3.copy.md)		Copies a matrix to the current matrix.
[create()](./server.matrix3.create.md)	`static`	Creates a new `Matrix3` instance.
[equals(matrix3)](./server.matrix3.equals.md)		Checks if the current matrix is approximately equal to another matrix.
[exactEquals(matrix3)](./server.matrix3.exactequals.md)		Checks if the current matrix is exactly equal to another matrix.
[fromMatrix4(matrix4)](./server.matrix3.frommatrix4.md)	`static`	Creates a new `Matrix3` instance from a `Matrix4` instance.
[fromQuaternion(quaternion)](./server.matrix3.fromquaternion.md)	`static`	Creates a new `Matrix3` instance from a `Quaternion` instance.
[fromRotation(angle)](./server.matrix3.fromrotation.md)	`static`	Creates a new `Matrix3` instance from a rotation of identity matrix.
[fromScaling(scale)](./server.matrix3.fromscaling.md)	`static`	Creates a new `Matrix3` instance from a scale of identity matrix.
[fromTranslation(translation)](./server.matrix3.fromtranslation.md)	`static`	Creates a new `Matrix3` instance from a translation of identity matrix. This is used only when working with two-dimensional homogeneous coordinates, which is why the `translation` parameter is a `Vector2`.
[identity()](./server.matrix3.identity.md)		Sets the current matrix to the identity matrix.
[invert()](./server.matrix3.invert.md)		Inverts the current matrix.
[multiply(matrix3)](./server.matrix3.multiply.md)		Multiplies the current matrix by another matrix.
[multiplyScalar(scalar)](./server.matrix3.multiplyscalar.md)		Multiplies each element of the current matrix by a scalar value.
[projection(width, height)](./server.matrix3.projection.md)		Sets the current matrix to a orthographic projection matrix with the given bounds.
[rotate(angle)](./server.matrix3.rotate.md)		Rotates the current matrix by an angle in radians.
[subtract(matrix3)](./server.matrix3.subtract.md)		Subtracts a matrix from the current matrix.
[toString()](./server.matrix3.tostring.md)		Returns a string representation of the current matrix.
[transformVector(vector)](./server.matrix3.transformvector.md)		Multiplies the provided vector3 by this matrix. This modifies the vector in-place, but also returns the transformed vector.
[transpose()](./server.matrix3.transpose.md)		Transposes the current matrix.