Jump to: Board index » General » Fusion

switching which object is being tracked with out moving...

Learn about 3D compositing, animation, broadcast design and VFX workflows.
  • Author
  • Message
Offline

Caleb Rodgers

  • Posts: 18
  • Joined: Tue Feb 03, 2015 8:24 pm

switching which object is being tracked with out moving...

PostFri Feb 16, 2018 12:00 am

I have a shot that doesn't have one tractable point. I want to follow one point until just before it goes off screen, then switch which point I am tracking with out moving the object following the track points, then finally move with the new track point on the next frame. If you watch the last 15 minuets or so of "Masking for airborne death. Um, I might have to redo some of it." on my channel Coolshows101 you get a visual representation.
Offline
User avatar

Bryan Ray

  • Posts: 2474
  • Joined: Mon Nov 28, 2016 5:32 am
  • Location: Los Angeles, CA, USA

Re: switching which object is being tracked with out moving.

PostFri Feb 16, 2018 12:08 am

Change the Path Center from "Pattern Center" to "Track center (append)."
Bryan Ray
http://www.bryanray.name
http://www.sidefx.com
Offline

Caleb Rodgers

  • Posts: 18
  • Joined: Tue Feb 03, 2015 8:24 pm

Re: switching which object is being tracked with out moving.

PostSun Feb 18, 2018 3:47 am

Thanks. I found a point I can track 22 frames in and I am planning to manually move my object for the first 22. Now I need to have it change perspective, like corner positioning but off set. How do I change size and position of the image I am tracking, then have it follow the track points?
Offline
User avatar

Bryan Ray

  • Posts: 2474
  • Joined: Mon Nov 28, 2016 5:32 am
  • Location: Los Angeles, CA, USA

Re: switching which object is being tracked with out moving.

PostSun Feb 18, 2018 7:30 pm

You can manually offset any tracked point using the X and Y Offset controls that appear at the bottom of the Tracker's control panel. Each point has its own Offset—select the point you wish to modify, and the sliders will change accordingly. The original tracked point keeps its usual two-arrow icon, and the offset point gets a small square linked to the parent point by a line. Scroll to the bottom of this image to see where I've indicated the Offset controls:

Untitled2.png
Untitled2.png (29.84 KiB) Viewed 900 times



You can connect a Point control to the offset point by right-clicking, and pointing to Connect To > Tracker Node > Tracker #: Offset Position. Note that in the Connect To menu, you get an entry for the entire node, and one entry each for the tracked points themselves. The two types of entries have different options and different purposes. To connect to one of the tracked points: Connect To > TrackerNodeTracker# > Position.

Untitled.png
Untitled.png (88.47 KiB) Viewed 900 times



The Tracker is one of the more complicated tools available in Fusion. It is well worth studying its entry in the Tool Reference Guide (p. 657ff in the July 2017 edition) and the Tracking chapter in the User Manual (Chapter 11, p. 309ff).
Bryan Ray
http://www.bryanray.name
http://www.sidefx.com

Return to Fusion

Who is online

Users browsing this forum: No registered users and 11 guests