Morph shapes where move_to was not in a matching pair would crash.
Now the previous pen position is used to generate the matching
move_to.
The ratio was backwards, causing the shape tween to run in
reverse. Morph shapes should now animate in the proper direction.
Switch from pixels to twips for internal calculations. swf crate
was updated to add a Twips wrapper-type. Ruffle will use this type
internally for transforms and shapes. This fixes some precision
errors in rendering (see heroes_of_cybertron.swf) and will match
what the Flash Player does internally more closely. (e.g.
DisplayObject x and y will be quantized to 1/20 pixel units). It
is up to the renderer to convert units from twip space to pixels
when rendering.
Mike Welsh