Motion Tracking: How to link a object which is not the tracked one?

Question

Hello,
I have a video, its a landscape and the camera is moving from left to right. I want a flare appearing on the right side. There is one point which is always in the picture, I used this point to track the motion.
But the problem is, when I want to link optical flares with the tracking point, the flare is always ON the tracking point, but I want it a little bit more on the right side...
How is it possible to link a Object which is not exactly on the tracking point?

Answer 1

Usually you would apply the tracking info to a null and then use an expression to tie the position property of whatever you are trying to attach to the null with a simple expression. If you need update the position then you can either add value + to the front of the pickwhip generated expression or, and sometimes this is best, add a second null, parent null 2 to null 1 and then use the a layer space transformation expression on the position property of your effect. The expression looks like this:
p = thisComp.layer("Null 2");
p.toComp([0,0,0]);
If I did not if I did not accurately understand the problem then please post a screenshot of your project with all of the properties for the layers in question revealed.
Here's what a project would look like: