Chart of car during the race

How to track an object so that part of the shape follows the object? What I mean by that: I am tracking a flying drone and I want a triangle to follow, but the point of the triangle to follow and the base of the triangle should remain without growth or movement. I'm trying to reproduce a line followed NASCAR. Any help?

Here's what I'm trying to do:

https://www.YouTube.com/watch?v=6Y_ukGDv6hU

Head to 02:21:50 and I'm trying to reproduce the gray triangle next to the car.

I guess you mean this:

You will need to learn Motion tracking, the effect of beam and simple expressions with the pickwhip.

  1. Open the pictures you want to use in the Panel film by double clicking on it in the project Panel
  2. Cut the cards to the part you want to use in the final blow by setting an entry and exit point by using ICT and the Alt/Option key + [and Alt/Option +]
  3. Select the images carved in the project Panel, and then choose file > new Comp from Selected
  4. Add a null value to the timeline
  5. Open the motion tracking workspace
  6. Select your video in the timeline
  7. Move the CTI on the image where you want to begin to see the sharp grey
  8. Select the video layer to the Source of the query in the monitoring panel and Track Motion (this should open the layer panel - if it does not open it manually by double-clicking on the footage in the timeline panel)
  9. Move the tracking box (it is no period but retail tracking) to the car and adjust the area research and size enough car to get a good lead (the default value is much too small for most of the time)
  10. Run the track for the period during which you want the gray thing to point to the car
  11. Check the track to make sure it's good and all the corrections you need to do
  12. Select the value Null as the target in the monitoring panel, then press on apply
  13. Return to the timeline and the comp Panel press U to reveal key images 1 Tracker in images
  14. Move the CTI for the beginning of the timeline, press the k key to jump to the first keyframe of Tracker 1
  15. Add a new solid of the size of the model to the timeline and cut the point by pressing the Alt/Option key +]
  16. Apply effect > generate > beam
  17. The length of the value to 100% and 50% time
  18. Set the start, end, colors and sweetness to get the look you want
  19. Add a chart for the title at the top block and put the anchor in the center of the graph, then cut to the point of the image
  20. Reveal the position property of the image by pressing the letter p
  21. Add an expression to the start Point of the beam by dragging the pickwhip to the position property of the graph
  22. Add an expression for the endpoint of the beam first typing 'p = then "drag the pickwhip to the position property of the Null value.
  23. You can then divide the table and subtract some pixels to the value of Y to move the point of arrival to the top
  24. [Cut the ends of the graph and the layers of beam by moving the ICT at the end of the pointer effect and press Alt/Option +]

You'll get something that looks like this:

The expression of the Position of end of beam modified to increase the end point above that the Null looks like this:

p = thisComp.layer("Null_1_Target").transform.position;

x = p [0];

y = p - 60 [1];

[x, y]

There are many ways to do this effect, but I think it's the easiest.

Tags: After Effects

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