Yes, I think so too. It would have been nice if it internally changed 0 to 0.0001 or something. I guess the only way around this is to build the matrices from scratch manually.

Or just alert the user if the scale is 0.

Thanks for the reply Dan.

Yes, that would work. But as the toWorlVec is both rotation and scale, I guess rotation is lost as well in that case?

I’m exporting objects to other applications and therefore I need to extract the world matrix of objects.

I’m using toWorldVec to extract the rotation/scale matrix from a 3d layer, but it seems like this expression breaks when scale is 0. Is there a way around this without changing the actual value of the layer?

Example:

thisComp.layer(2).toWorldVec([1,0,0])
// returns an error if the scale is 0 on any axis.

I’m having some trouble with extracting the global orientation values using the toWorldVec method.

It all seems to work well as long as the rotation values are within -90 and 90, but outside of that it fails. Example:

– Create a new camera and animate the Y rotation from 0 – 150 degrees.

– Create a text layer and apply the following expression to the…

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It almost feels like the whole thing is random? Things that worked stopped working the next day etc?

It still seems like it’s doing some rounding errors.

In the above code it seems to work if the getFrameRange function adds a Math.floor to each value before it returns them.

I also struggled with setting the startFrame of a comp. From what I understand you can use comp.displayStartFrame directly now, but as far as I can tell that won’t work in older…

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Thanks for the reply and example code Dan!

I started over from scratch with your code and it actually seems to be that simple.

The things that always seemd to mess up my calculations were custom start frames on the composition and how the frame was setup in the TimeDisplayStyle was set (to 0 or 1).

Here’s some example code that in my first tests seem…

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I’ve been banging my head trying to get the same result as the expression timeToFrames but via scripting (as it’s missing and can’t use timeToCurrentFormat).

Every time it seems to work, it breaks in more extreme situations (like changing the frame-rate to very high/low).

I’m trying to do some simple calculation like get the first and last frame via…

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Hm, I actually seems like toWorldVec does work with poi. But it seems to break in some situations?

Thanks to a few post on these forums I’ve been able to get the world orientation of objects (via toWorldVec). Everything is working great, except for objects that use the point of interest property.

Is there a way to take the point of intrest into account when extracting the rotation matrix?

Thanks!

* I “only” need the matrix, not the full matrix to…

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Thanks a lot Dan, that seems to work perfectly!

* I haven’t asked a question here in 10 years, and from what I remember you helped me that last time as well. Simply amazing work!

I have a 3×3 matrix (generated from layer.toWorldVec) and I would like to extract scale values from this matrix. Is this possible? I found some expression to extract rotation values which seems to work well, but I haven’t found a way for scale.

// 3x3 matrix
L = thisComp.layer("Dark Gray Solid 1");
u = L.toWorldVec([1,0,0]);
v =…

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