Quaternion Constructors

Definition

Namespace:

System.Windows.Media.Media3D

Assembly:

PresentationCore.dll

Initializes a new instance of the Quaternion structure.

Overloads

Quaternion(Vector3D, Double)	Initializes a new instance of the Quaternion structure.
Quaternion(Double, Double, Double, Double)	Initializes a new instance of the Quaternion structure.

Quaternion(Vector3D, Double)

Initializes a new instance of the Quaternion structure.

C#

public Quaternion(System.Windows.Media.Media3D.Vector3D axisOfRotation, double angleInDegrees);

Parameters

axisOfRotation

Vector3D

Vector3D that represents the axis of rotation.

angleInDegrees

Double

Angle to rotate around the specified axis, in degrees.

Remarks

The W property of the quaternion is computed automatically.

Quaternion(Double, Double, Double, Double)

Initializes a new instance of the Quaternion structure.

C#

public Quaternion(double x, double y, double z, double w);

Parameters

x

Double

Value of the new Quaternion's X coordinate.

y

Double

Value of the new Quaternion's Y coordinate.

z

Double

Value of the new Quaternion's Z coordinate.

w

Double

Value of the new Quaternion's W coordinate.

Remarks

For the axis (x, y, z) and angle of rotation theta, the w value for the quaternion is:

w = cos(theta/2)

Note that if you use the Vector3D constructor, the fourth parameter is the angle, in degrees, and the w calculation is performed for you.