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Camera flat facing 3D object in 3D motion tracked footage
Hi there,
First post ever in the forum, would appreciate a lot your help because I can’t seem to find a solution to something I want to achieve.
I have a shot taken with a drone that is just rotating in the air. I have used the motion tracker to generate a camera and tracking points to attach some text/objects to. The issue is trying to make these objects face flat to the camera at all time. The Layer:Transform:Auto-Orient doesn’t seem to work, of course, the generated camera is not really moving, its just simulating the footage perspective!!
2D tracking is not an option. I want the objects to exit the screen naturally, as they would do if they were really integrated in the shot.
Can this be done??
Any help would be awesome. Thanks!!!
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3 Replies
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use the 3D tracker option.
If the points don’t come close, you can just set up close by but preview first.
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Paste
C = thisComp.activeCamera;V = C.toWorldVec([0,0,1]);
P = toWorld(anchorPoint);
lookAt(P, P + V);
At the layers orientation to make them flat to the camera.You could also map a 3d position to a 2d one. Pasting this to a position of a 2d layer:
a=thisComp.layer("reference null");
a.toComp(a.anchorPoint)Cassius Marques
http://www.zapfilmes.com -
The 3D position to 2D expression worked like a charm. Couldn’t make the orientation one to work, I am not good enough at expressions. Thanks Cassius!!!
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