How do I track an object so that part of a shape follows the object? What I mean by this is: I'm tracking a drone flying and I want a triangle to follow it, but only the point of the triangle to follow and the base of the triangle should remain still without growing or moving. I am trying to replicate a NASCAR tracking line. Any help?
Here is what I am trying to do:
Head to 2:21:50 and I am trying to replicate the grey triangle following the car.
Use the Beam effect. Use motion tracking in AE to track your drone. Apply the tracking data to a null object. Use expressions to tie one end of the Beam to that null. Adjust the settings in the Beam effect so that it looks less like a light saber/laser beam and more like a solid line. Change the size of one end so it's more triangle-y.