[bug]Text position matrix operation is incorrect

[Danjuanlab]

I have a project that is useful for dynamic layout. I tried to use expressions in AE to accomplish this purpose, but when exporting animation, the position of the text in the web page is different from that in AE. I found that the data in the position matrix of the text on the front end of the webpage is different from that in AE.
OS：win10 64bit
AE2019

sample.zip

[Danjuanlab]

@bodymovin I inadvertently debugged and found that this error seemed to originate from the order in which the expressions were evaluated. Place the graphics layer above the text layer, and the export result is correct. So my guess is that when generating the json file, the text position is calculated first. At this time, the text expression is calculated based on the original data of the graphic.

[bodymovin]

This is also related to sourceRectAtTime, unfortunately, when using this method, the order of expression evaluation is not respected because the element needs to be rendered to calculate its size.

[Danjuanlab]

This is also related to sourceRectAtTime, unfortunately, when using this method, the order of expression evaluation is not respected because the element needs to be rendered to calculate its size.

Thanks for your information, I will think again if there is a way to achieve dynamic size change without applying this sourceRectAtTime. However, for the design of dynamic width interactive UI controls, this function seems to be inevitable. I hope that there are plans to optimize it in the future.