How to align pasted effect coordinates to target anchor point

Question

I have created a new composition and inserted a video. I used the face track feature and I have now Face track coordinates.

The anchor point of the video layour is set to 320;180.

I added a picture to a new layer. It is different size and has a different anchor point (it is still in the center of the composition). It's anchor point is 203;175

When I copy the face track points, they have the coordinates of the original video (and I guess use it's anchor point). So when I paste it, the face track coordinates are way off in the picture.

How can I align the copied values to consider the actual anchor point?

Mylenium · Answer

Such stuff requzires to use the toComp() and fromComp() layer space transforms to convert coordinates from layer to comp and back or you manually add/ subtract values. hard to say what exactly needs to happen based on such incomplete info. Here's something that explains the basic drill:

mA=thisComp.layer("A");
mB=thisComp.layer("B");

mPosA=mA.transform.position;
mAncA=mA.transform.anchorPoint;
mPosB=mB.transform.position;
mAncB=mB.transform.anchorPoint;

X=mPosB[0]-mPosA[0]+mAncB[0]-mAncA[0];
Y=mPosB[1]-mPosA[1]+mAncB[1]-mAncA[1];

[X,Y]

Making this up on the go, so no guarantees for typos or correctness, but I hope you get the idea. Just play around with it.

Mylenium

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