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

Constructor	Modifiers	Description
[(constructor)(x, y, z, w)](./server.quaternion._constructor_.md)		Constructs a new instance of the `Quaternion` class

## Properties

Property	Modifiers	Type	Description
[length](./server.quaternion.length.md)	`readonly`	number	The length of the quaternion.
[magnitude](./server.quaternion.magnitude.md)	`readonly`	number	The magnitude of the quaternion. Alias for `.length`.
[squaredLength](./server.quaternion.squaredlength.md)	`readonly`	number	The squared length of the quaternion.
[squaredMagnitude](./server.quaternion.squaredmagnitude.md)	`readonly`	number	The squared magnitude of the quaternion. Alias for `.squaredLength`.
[w](./server.quaternion.w.md)		number	The w-component of the quaternion.
[x](./server.quaternion.x.md)		number	The x-component of the quaternion.
[y](./server.quaternion.y.md)		number	The y-component of the quaternion.
[z](./server.quaternion.z.md)		number	The z-component of the quaternion.

## Methods

Method	Modifiers	Description
[clone()](./server.quaternion.clone.md)		Creates a clone of the current quaternion.
[conjugate()](./server.quaternion.conjugate.md)		Conjugates the current quaternion.
[copy(quaternion)](./server.quaternion.copy.md)		Copies the components of a `QuaternionLike` object to the current quaternion.
[dot(quaternion)](./server.quaternion.dot.md)		Calculates the dot product of the current quaternion and another quaternion.
[equals(quaternion)](./server.quaternion.equals.md)		Checks if the current quaternion is approximately equal to another quaternion.
[exactEquals(quaternion)](./server.quaternion.exactequals.md)		Checks if the current quaternion is exactly equal to another quaternion.
[exponential()](./server.quaternion.exponential.md)		Calculates and sets the current quaternion to its exponential.
[fromEuler(x, y, z)](./server.quaternion.fromeuler.md)	`static`	Creates a quaternion from Euler angles.
[fromQuaternionLike(quaternionLike)](./server.quaternion.fromquaternionlike.md)	`static`	Creates a quaternion from a `QuaternionLike` object.
[getAngle(quaternion)](./server.quaternion.getangle.md)		Calculates and returns the angle between the current quaternion and another quaternion.
[identity()](./server.quaternion.identity.md)		Sets the current quaternion to the identity quaternion.
[invert()](./server.quaternion.invert.md)		Inverts each component of the quaternion.
[lerp(quaternion, t)](./server.quaternion.lerp.md)		Linearly interpolates between the current quaternion and another quaternion.
[logarithm()](./server.quaternion.logarithm.md)		Sets the current quaternion to its natural logarithm.
[multiply(quaternion)](./server.quaternion.multiply.md)		Multiplies the quaternion by another quaternion.
[normalize()](./server.quaternion.normalize.md)		Normalizes the quaternion.
[power(exponent)](./server.quaternion.power.md)		Raises the current quaternion to a power.
[randomize()](./server.quaternion.randomize.md)		Randomizes the current quaternion.
[rotateX(angle)](./server.quaternion.rotatex.md)		Rotates the quaternion around the x-axis.
[rotateY(angle)](./server.quaternion.rotatey.md)		Rotates the quaternion around the y-axis.
[rotateZ(angle)](./server.quaternion.rotatez.md)		Rotates the quaternion around the z-axis.
[scale(scale)](./server.quaternion.scale.md)		Scales the quaternion by a scalar value.
[setAxisAngle(axis, angle)](./server.quaternion.setaxisangle.md)		Sets the current quaternion to the angle and rotation axis.
[slerp(quaternion, t)](./server.quaternion.slerp.md)		Spherically interpolates between the current quaternion and another quaternion.
[toString()](./server.quaternion.tostring.md)		Returns a string representation of the quaternion in x,y,z,w format.
[transformVector(vector)](./server.quaternion.transformvector.md)		Rotates the provided vector by the rotation this quaternion represents. This modifies the vector in-place, but also returns the rotated vector.