How to draw an extending arrowed-headed curve following a tracker's path?
Noob here. 3rd day into AfterEffects. So, kindly bear with me. :)
I'm trying to put two concepts together:
- An extending arrowed-headed curve following a pre-drawn path. This can be done by following this video: https://www.youtube.com/watch?v=ofwHRvKuwqo
- Track a player/object in a video and form a path, to which objects can be attached. This can be done by following this video: https://www.youtube.com/watch?v=VNM22hh2dIE
Now, I try to put the two concepts together: I want to make a video, where it's a football/soccer video, and I track a player, but then, before the player start to move in the video, I draw an extending arrow-headed curve from the player's current position to their future position, then with that extended curve on the screen, play the video, which shows that the player moves along the path.
My difficulty: I'm stuck at the step where after I get the player tracked (I have a "Tracker Point" and its "Attach Point" with many keyframes), I cannot make a curve shape to follow that tracker's path (before I set the Trim Paths of that curve to 0->100 so that it extends over time).
I wonder if my overall approach to make this effect is just wrong, or did I miss something in this the bolded step.