Class Quaternion

Clones the instance.

Returns a value that represents the current rotation in Euler angles.

Returns the dot product of the quaternion and v.

Compares the quaternion to v, and returns true if they are approximately equal.

Updates the quaternion's value to the identity rotation. This is the state of having no rotation.

Inverts the quaternion's value.

Returns the quaternion's length when viewed as a 4-dimensional vector.

Returns the quaternion's squared length when viewed as a 4-dimensional vector.

Multiplies the quaternion's value by v.

Normalizes the quaternion's value.

Sets the quaternion's component values to those specified in x, y, z, and w.

Updates the quaternion to a value that represents a rotation of degree degrees around the axis.

Example

new Quaternion().setFromAxisAngle(new Vector3(0, 1, 0), 90);

Updates the quaternion to a value that represents a rotation in Euler angles. Axes are applied in the order of ZXY.

Example

new Quaternion().setFromEulerAngles(new Vector3(90, 0, 0));

Updates the quaternion to a value that represents a rotation in Euler angles. Axes are applied in the order of ZXY.

Example

new Quaternion().setFromEulerAngles(90, 0, 0);

Calculates the spherical linear interpolation (slerp) between the current value and v, using a as the interpolation factor, then updates the quaternion's value to the result.

Example

let min = new Quaternion().identity();
let max = new Quaternion().setFromEulerAngles(0, 45, 0);
min.clone().slerp(max, 0.5);

Gets the axis and angle values that represent the current rotation.

Gets the quaternion that represents a rotation of degree degrees around the axis.

Example

let q = Quaternion.axisAngle(new Vector3(0, 1, 0), 90);

Gets the quaternion by the value that represents a rotation in Euler angles. Axes are applied in the order of ZXY.

Gets the quaternion by the value that represents a rotation in Euler angles. Axes are applied in the order of ZXY.

Gets a Quaternion that changes orientation from from direction to another direction to.

Creates a Quaternion looking towards forward direction with the upward direction being up.

up is optional, and if omitted, it will be treated as if new Vector3(0, 1, 0) was specified.