[Closed] Protractor Helper

here is it…

 /* denisT collection 2013 */

plugin helper ProtractorPro
	name:"Pro-Tractor" 
	classID:#(0x1967, 0x0aabbcc03) 
	category:"Standard" 
	extends:Protractor
	replaceUI:off
(
	parameters extra 
	(
		angle type:#float animatable:off
		on angle get val do 
		(
			if (targets = refs.dependson delegate).count > 1 then
			(
				node = refs.dependentnodes this firstonly:on
				acos (dot (normalize (node.pos - targets[1].pos)) (normalize (node.pos - targets[2].pos)))
			)
			else val
		)
	)
)
 

enjoy!

Collected:
The Protractor object works in a manner similar to the Tape object, but it measures the angle between two objects. To use the Protractor object, click in a viewport to position the Protractor object. (The Protractor object looks like two pyramids aligned point to point and represents the origin of the angle.) Then click the Pick Object 1 button, and select an object in the scene. A line is drawn from the Protractor object to the selected object. Next, click the Pick Object 2 button. The angle-formed objects and the Protractor object are displayed in the Parameters rollout. The value changes when either of the selected objects or the Protractor is moved.