# Vector3D.angleBetween()

**URL:** <https://forum.kirupa.com/t/vector3d-anglebetween/274899>\
**Category:** programming\
**Created:** [November 6, 2008, 11:23am UTC](https://forum.kirupa.com/t/vector3d-anglebetween/274899 "2008-11-06T11:23:11Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![substance](https://avatars.discourse-cdn.com/v4/letter/s/c6cbf5/32.png) [@substance](https://forum.kirupa.com/u/substance)\
**Post date:** [November 6, 2008, 11:23am UTC](https://forum.kirupa.com/t/vector3d-anglebetween/274899/1 "2008-11-06T11:23:11Z")

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Flash player 10 has come with a ton of cool new built in function that provide easy solutions to classic gaming problems. For Example:

> distance(pt1:Vector3D, pt2:Vector3D):Number  
> [static] Returns the distance between two Vector3D objects.

> pointAt(pos:Vector3D, at:Vector3D = null, up:Vector3D = null):void  
> Rotates the display object so that it faces a specified position.

But one of the most seemingly useful methods confuses me, or I’m just using it wrong.

> angleBetween(a:Vector3D, b:Vector3D):Number  
> [static] Returns the angle in radians between two vectors.

Does anyone have any experience with this or got it working with rotation? Maybe it’s not possible for use because its returning a 3-dimensional angle…

Anyway, anyone find any other practical uses for these new methods? Are these built-in methods faster than the previous way of finding distance, angle etc.?