Encelade

I'm working on a patch allowing to put spheres on a space, and then draw link between them.

I'm able to put two spheres (let say A and B) and a cylinder as a link, but I can't figure how to automatically align the cylinder with the spheres.

I've got the coordinates of AB vector, giving its norm (being then the cylinder length). I also placed the cylinder in the middle of A and B. So I got good mean position, and good cylender length.

I can rotate the cylinder to place it manually, but I would like it to be done automatically, based on AB vector (= cylinder has to be parallel to AB, and placed at the middle of AB : it will then give the illusion of connectig A and B).

I tryed to work on (AB) slope's and played with rotate/rotatexyz on cylinder, but I can't find the mathematical relationship to implement, and I do not know what cylinder's parameter to control with it. Something with cosinus probably :) The main thing is that I do not know understand the operation to do with Max. I got basic skills in Jitter : for example I do not use nodes (and I don't know what it is), I do not take parent notion into account as I do not understand how to define "X object is parent of Y"... I worked on learning these points but I do not understand them clearly...

I do not put the code here as this is part of a bigger patch, with remote send and receive ordes + patch dynamically loading.

I put a screenshot of it, hope this will help understand.

(I looked at Max's tutorials and on the web, to better understand jJter - especially for camera and animation / nodes. Globally speaking it's quite confusing for me, so if you have good ressources on it, feel free to give ! :) thanks)

I'm working on a patch allowing to put spheres on a space, and then draw link between them. 

I've got the coordinates of AB vector, giving its norm (being then the cylinder length). I also placed the cylinder in the middle of A and B. So I got good mean position, and good cylender length.
I can rotate the cylinder to place it manually, but I would like it to be done automatically, based on AB vector (= cylinder has to be parallel to AB, and placed at the middle of AB : it will then give the illusion of connectig A and B). 

I do not put the code here as this is part of a bigger patch, with remote send and receive ordes + patch dynamically loading. 

Align two spheres and a cylinder... :)