32bitkid

I think the real question about rotation being clockwise or counter/anti-clockwise can really only be answered by talking about the y axis. Is a positive up system (traditional cartesian plane) or a positive down (bitmap/screen coordinates)? If its the former then counter-clockwise is my vote. If its the latter, then clockwise is my vote. For what its worth. And I think a non frame-based animation system is a fantastic and I like that its manifested as such in the file format.

The programmer in me thinks that it would be nicer to use guids for ids rather than integers. That would avoid conflicting id references between files -- like when merging two files together programmatically, inserting elements like key elements, parsing the document into a dictionary, or just searching the document. With that, I think it would make sense for element to reference folder id and image name, since ids would always be unique, but names would only be unique within a folder context. The programmer in me also thinks that rather than storing x,y,sx,sy,r, store the first six elements of a 3x3 2d transformation matrix -- where the last three elements are assumed to be 0,0,1. Though, the tradeoff would be that it would make it less human readable, but I think its a worthwhile tradeoff, and support for skews would be a pleasant plus. Lastly, I kinda feel like the should be a reference -- like images -- rather than a hard coded value per frame. But, that more of a feeling than having a real rational objective... Those are my initial thoughts anyway, and these are just suggestions that cater to my programmer side. My artistic side thinks the format is structurally sufficient.