- From: Øyvind Stenhaug <oyvinds@opera.com>
- Date: Fri, 04 Nov 2011 16:59:54 +0100
- To: www-style@w3.org, public-fx@w3.org
http://dev.w3.org/csswg/css3-2d-transforms/#animation or http://www.w3.org/TR/2009/WD-css3-2d-transforms-20091201/#animation and also http://dev.w3.org/Graphics-FX/modules/2D-transforms/spec/2DTransforms.html#animation This section gives rules for interpolating transform values for transition/animation purposes. However, it is unclear on some points. 1) A couple of points are conditional on functions being "of the same type". It is not clear what "type" means. E.g.: a) Is translate(20px) the same type as translate(40px, 40px)? b) translate(20px) and translateX(20px)? c) translate(20px) and translate(80%)? 2) Even assuming that having the "same type" simply means having identical FUNCTION tokens and the same number of parameters, we end up at "the individual components of the function are interpolated numerically", which doesn't make sense unless each pair of "components" have matching units. 3) Even if considering parameters with different units to result in functions being different "type", the "Otherwise" step says to convert to matrix values. But transitions/animations operate on computed values, and percentages cannot be resolved at this level (they depend on used values). -- Øyvind Stenhaug Core Norway, Opera Software ASA
Received on Friday, 4 November 2011 16:00:36 UTC