From the course: Cinema 4D R23 Essential Training: VFX

Solving an object tracked shot - CINEMA 4D Tutorial

From the course: Cinema 4D R23 Essential Training: VFX

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Solving an object tracked shot

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- [Tutor] To solve an Object Track Shot, we need to create an object tracker and transfer the data from the motion tracker to it. Before we continue, if you can't see the footage that I'm using here, just hop over to the footage tab and reconnect the can object track image sequence. With the motion tracker selected, you can create an object tracker in a couple of ways. You can come over to the tracker menu and just create one here, or if you're in the motion tracker layout, you can find the button here and just click. Because we had the motion tracker selected, the motion tracker is automatically added here. If you didn't have the motion track selected, this would be blank and you'd need to add it manually just by dragging it in. What we need to do now is come back onto the motion tracker and select all the user tracks that we want to apply to the object tracker. In this case, it's all of them. So we can right click and choose Select all. Now we want to apply these to the object tracker so we could right click and choose assign to object, object tracker, or another method is to come onto the object tracker in the trackers tab, choose assign selected. So clicking that, you can see that they're all added to the list. And if we scrub through, we can verify that they're on the object. Now we've transferred the tracks to the object tracker, we can run the 3D Solver on the object tracker itself. So come over to the reconstruction tab and just click the Run 3D Solver for Object button. So with that done, what's great to see is that we have key frames on every single frame here, and we can scrub the timeline, just verify that. Let's lock our solved data. Next, we need to add constraints to the object tracker. So I'm going to click to create a position constraint here, and then I'll click and hold and add a vector constraint, I'll click at the top, and then click down here. And this will be our y-axis with a known length of 7.5 centimeters. Next, we can click and hold and choose a Planar constraint. So I'm going to click here, here, and here. And this will be our x-axis. So with our object track solved and constraints set, the next stage would be to add test geometry and then integrate a model into the shot. And we'll do that next.

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