[Closed] Line between two objects

Hi,

I want to create a line that stays between two objects, it will be used in a character rig to show the directions of pole vectors and such.

So far I’ve used Burnett’s Null object, but I would like to make the rig free from external plugins, and I want to do this using only one object. I have a test function that uses a SplineShape with instanced controllers on each vertex, but it doesn’t work if I parent the objects that the shape gets its controllers from…

Here’s the function I made:

function createLine =
  (
 	startObj = sphere pos:[20,0,0] radius:2  
 	endObj = sphere pos:[0,40,0] radius:2
 	
 	local tShape = SplineShape pos:[0,0,0]
 	addNewSpline tShape
 	addKnot tShape 1 #corner #line startObj.pos
 	addKnot tShape 1 #corner #line endObj.pos
 	updateShape tShape
 	
 	startCon = Point3_XYZ()
 	endCon = Point3_XYZ()
 	
 	animateVertex tShape #all
 
 	tShape[4][8].controller.Spline_1___Vertex_1.controller = startCon
 	tShape[4][8].controller.Spline_1___Vertex_2.controller = endCon
 	
 	startCon[1].controller = startObj.pos.controller[1].controller
 	startCon[2].controller = startObj.pos.controller[2].controller
 	startCon[3].controller = startObj.pos.controller[3].controller
 	
 )
 
 createLine()

Has anyone here a better suggestion?