[XML] Generating xml results in incorrect positional data

[YashinskiDev]

Hello,

I'm creating an FCP XML generation library and had encountered some funky maths with position,scale and anchor points.

I got the feel they are all related, but could'nt find the correct method to accurately supply keyframe data in pixels and have it translated correctly to the relative/fractional number that is stored in the xml file.

Could someone please help me understand how the conversion works so I could implement transform effects?

Example:
Input:

pos: 1655.8, 882.9

anchor: 1134.8, 799.3

scale: 66.7

Desired output:

pos: -0.591039, -0.740126

anchor: 0.0910389, 0.240126

scale: 66.7

Actual output:

pos: 0.271364, 0.793074

anchor: 0.091042, 0.240093

scale: 66.7

[Bruce Bullis · Accepted solution]

Sorry, Adobe has no additional details to offer; PPro's FCP XML implementation is based on Apple's file format specification. 

[YashinskiDev]

Thanks.