Quaternion.equals()

The Quaternion.equals() method is used to compare two quaternions and check whether they are equal or not. It returns true if both the quaternions have the same values for the x, y, z and w components, false otherwise.

Syntax

quaternion.equals( other )

Parameters

• other: The quaternion to compare.

Return Value

• Returns true if the two quaternions are equal, false otherwise.

Example

const quat1 = new THREE.Quaternion(0.707, 0, 0, 0.707);
const quat2 = new THREE.Quaternion(0.707, 0, 0, 0.707);

const result = quat1.equals(quat2);

console.log(result); // true

Notes

• In three.js, Quaternion is a class that represents a 4D vector used to encode rotations in 3D space. It is implemented using the Vector4 class in three.js.
• Quaternions are often used instead of Euler angles to avoid the problem of gimbal lock, which can occur when using Euler angles in certain situations.
• Quaternions are not commutative, meaning that q1 * q2 is not equal to q2 * q1 in general.

See Also

• Quaternion
• Vector4.equals()