Legacy Documentation: Version 4.3.0
HandleUtility.ClosestPointToArc
static function ClosestPointToArc(center: Vector3, normal: Vector3, from: Vector3, angle: float, radius: float): Vector3;
static Vector3 ClosestPointToArc(Vector3 center, Vector3 normal, Vector3 from, float angle, float radius);
static def ClosestPointToArc(center as Vector3, normal as Vector3, from as Vector3, angle as float, radius as float) as Vector3
Description

Get the point on an arc (in 3D space) which is closest to the current mouse position.

This function takes the arc defined by its parameters and "flattens" it into screen space. The closest point between the flattened arc and the current mouse position (also in screen space) is then found and converted back into a 3D point on the original 3D arc. This is useful for Handle GUIs that involve rotation of an object around the center of the arc; the 2D mouse movements are converted into 3D space in the familiar way used by Unity's built-in tools.