Math / Sprites question

[Slastraf]

What would be the best way to make a raycast between two points visible ? It is needed for a mechanic inside the game (no debug DrawLine)

local selfpos = self.entity:GetPosition(true)
sprite:SetPosition(selfpos+(other:GetPosition(true)-selfpos)*Vec3(0.5, 0.5, 0.5))

So far I came up with this. In this case other is an entity at the second point. It will place an object in the middle of the two Points. The question is how I rotate the model (plane) that it looks toward the Camera without many lines of code, and be reasonable efficient ? And then how do I scale it so that it will have its edges at each point ?

[Slastraf]

I found this which could possibly help, but did not test it yet:

Update:

I added a post there, with my edition of the script.